What are some positive and negative things about living near a volcano?

Answers

Answer 1
Pros and cons If a volcano erupts, homes can be destroyed, and thousands could be left homeless, or could be killed.
If a volcano erupts a lot of wildlife could be killed, and many species can go extinct because of the eruptions.
If lava is flowing onto a road, people cannot out run it.
People can suffocate on ash

Related Questions

A food company produces raspberry coulis as a topping for its best-selling line, double strength chocolate mousse pie. Fresh raspberries comprising 5% seeds, 20% pulp solids, and 75% water are homogenised and placed in a stainless steel vat. Sugar is added to give a raspberry:sugar mass ratio of 3.5:1. The mixture is blended, strained to remove the seeds, then heated to reduce the water content to 35%. Half a tonne of coulis is produced every day.

Required:
a. What mass of raspberries is required per week?
b. How much sugar is required per week?
c. What is the sugar content of the coulis?

Answers

Answer:

5357.1429kg per week

2142.8571 kg per week

Explanation:

Given that :

Fresh Raspberries :

5% = seeds

20% = pulp solids

75% = water

Raspberry : Sugar = 3.5 : 1

Water content = 35%

Coulis produced per day = 0.5 tonnes

Mass of Raspberry produced per week :

Mass is measured in kg;

1 tonne = 1000kg

0.5 tonne = (1000/2) kg = 500kg

Mass of Coulis produced per week = 500kg * 7 = 3500kg

Coulis contains 35% water, Raspberry required 75% water :

(3500 / 35) * 75 = 7500kg

Raspberry : Sugar ratio = 3.5 : 1

Mass of Raspberry :

[7500 - (1 /3.5) * 7500]

7500 - 2142.8571

= 5357.1429kg per week

B.

Sugar required per week:

(1/3.5) * 7500kg

= 2142.8571 kg per week

C.)

Sugar content in coulis :

To run a spectrophotometry experiment, begin by _________ the spectrophotometer and preparing the samples. Be sure to select the correct ________, then run a measurement on the _________ solution. Follow up by running measurements on _______solutions. Once data is collected, turn off the instrument, clean the area, and discard the samples.

Answers

Answer:

To run a spectrophotometry experiment, begin by warming up the spectrophotometer and preparing the samples. Be sure to select the correct wavelength, then run a measurement on the blank solution. Follow up by running measurements on sample solutions. Once data is collected, turn off the instrument, clean the area, and discard the samples.

Explanation:

The spectrophotometer is a device used in laboratories to carry out analysis in experiments that need to measure and compare the amount of light absorbed or transmitted between samples, regardless of whether the samples are transparent or opaque solid. The spectrophotometer can be single-beam and double-beam. Regardless of the nature of the beam, to perform a spectrophotometry experiment, you must start by heating the spectrophotometer and preparing the samples. Make sure to select the correct wavelength and perform a measurement on the blank solution. Follow up by performing measurements on sample solutions. Once the data is collected, turn off the instrument, clean the area and discard the samples.

nitrophenol is more acidic than phenol. ​

Answers

Answer:

The p- nitrophenol is more acidic than phenol because the deactivating nature of nitro group and after loosing the protons it makes more resonance stabilization as nitro group is having strong deactivating nature so it attracts electrons towards it.

Which illustration is a closed circuit? * + A B​

Answers

Answer:

I believe its B for sure

Hope this helps!

Explanation:

I think it is B, by far. Hope this helps you out

Given 5.86 grams of NaN3, how many grams of Na are produced?

Answers

Answer:

what no entiendo nada jahag6

When 5.86 grams of NaN3, then 22.99 gram of Na are produced by using mole formula.

What is gram ?

A thousandth of a kilo-gram in terms of mass in the metric system.

What is mole?

A mole is a unit of measurement for atom amount. A mole of Iron atoms weighs heavier than just a mole of Carbon molecules because it is measured by the number of atoms present instead of by weight.

The reaction can be written as:

[tex]2 Na N_{3}[/tex] → 2Na + [tex]3N_{3}[/tex].

It can be seen that 2 mole of sodium azide give 3 mole of nitrogen molecule.

Calculate the moles of Na.

Moles of Na = 1 mol sodium azide × 2 mol of Na / 2 mol sodium azide = 1 mole of Na.

Calculate the mass of Na.

Mass of Na = 1 mol Na × 22.99 g Na / 1 mol Na = 22.99 gNa.

Therefore, the mass of Na will be 22.99 gram

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20 Points!! Which of the following is a synthesis reaction? AgNO3+NaCI--> AgCI+NaNO3
CH4+O2->CO2+H2O SO3+H2O-> H2SO4 Cu+AgNO3 ->Ag+CuNO3

Answers

the third one
synthesis reactions have multiple reactants that synthesize into one product

Question 5
2 pts
How many atoms of helium are found in a helium balloon if it has 3.9g of helium
inside?
The answer should be
x1023
Type the number that precedes the x1023

Answers

Answer: There are [tex]6.2\times 10^{23}[/tex] atoms of helium are found in a helium balloon if it has 3.9 g of helium  inside.

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}=\frac{3.9g}{4.00g/mol}=0.975moles[/tex]

1 mole of helium contains = [tex]6.023\times 10^{23}[/tex]  atoms

Thus 0.975 moles of helium contain = [tex]\frac{6.023\times 10^{23}}{1}\times 0.975=6.2\times 10^{23}[/tex]  atoms

A sample of polystyrene, which has a specific heat capacity of 1.880 J.g .°C , is put into a calorimeter (see sketch at right) that contains 300.0 g of water. The polystyrene sample starts off at 94.9 °C and the temperature of the water starts off at 22.0 When the temperature of the water stops changing it's 27.7 °C. The pressure remains constant at 1 atm. Calculate the mass of the polystyrene sample.

Answers

Answer:

56.6g

Explanation:

Given that :

Mass of water, m1= 300.0 g

Temperature of water, T1= 22°C

Specific heat capacity of water, C= 4.184 J/g°C

Mass of polystyrene, m2=?

Temperature of polystyrene = 94.9

Specific heat capacity of polystyrene, c2= 1.88 J/g°C

Final temperature = 27.7 oC

Heat lost by polystyrene = Heat gained by water

mc(dT) = mc(dT)

m2 * 1.88 * (94.9 - 27.7) = 300 * 4.184 * (27.7 - 22)

m2 * 1.88*67.2 = 300*4.184*5.7

126.336 * m2 = 7154.64

m2 = 7154.64 / 126.336

m2 = 56.631838

Hence, mass of polystyrene = 56.6g

HCl (aq) + H2O (l) ⇌ H3O^+ (aq) + Cl^- (aq)
In 1.0 M HCl (aq), is nearly 100 percent dissociated, as represented by the equation above. Which of the following best helps to explain why, in 0.01 M HCN (aq), less than 1 percent of HCN is dissociated?

A. Compared to the HCl (aq) solution, the concentration of the HCN (aq) solution is much too dilute to achieve 100 percent dissociation.

B. The CN^- ion is not very soluble in water, and a solid precipitate would form if more of the HCN dissociated..

C. The equilibrium constant for the dissociation of HCN (aq) is much smaller than that for the dissociation of HCl (aq).

D. HCN (aq) reacts with water to form a basic solution, and the high concentration of OH^- (aq) interferes with the dissociation process.

Answers

There is lesser dissociation of hydrogen cyanide as compared to HCl, as  equilibrium constant for the dissociation of hydrogen cyanide has been smaller than HCl. Hence, option C is correct.

Hydrogen cyanide has been a weak acid that has been dissociated into the constituent ions. The dissociation of the compound in water has been corresponds to the equilibrium constant.

Equilibrium constant for hydrogen cyanide and HCl

The equilibrium constant has been defined as the ratio of the concentration of solute and solvent ions at equilibrium.

The sample with lesser equilibrium constant tends to dissociate at lesser concentration as well.

The equilibrium constant for the dissociation of hydrogen cyanide has been smaller than HCl. Thus, there will be lesser dissociation of hydrogen cyanide as compared to HCl. Hence, option C is correct.

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Dividend
Divisor
Quotient/ Remainder
SAGOT
75
21
16.) 54
17.) 108
18.) 380
19.) 633
20.) 648
27
76
57
32
Solo
nihanda ni:
NNA MARIE S. CARAIT
borrinoloticon​

Answers

Answer:

Dividend Divisor Quotient/ Remainder SAGOT 75 21 16.) 54 17.) 108 18.) 380 19.) 633 20.) 648 27 76 57 32. Solo nihanda ni: NNA MARIE S.

Explanation:

When two substances combine to form a mixture, the properties of the substances change. True False

Answers

Answer:

Tell students that sometimes when two (or more) substances are mixed together, a change occurs and another substance (or substances) is created. This is called a chemical reaction. Gas may form, heat may be produced, and color may change. These types of changes indicate that a chemical reaction has occurred.

Trial 12 1.Volume of Acid used ( mL) 2020 2.Molarity of acid used (M) 0.0160.016 3.Initial volume reading of base buret 018.6 4.Final volume reading of base used 18.636.9 5.Volume of base used (4-3, mL) _________ _________ 6.Molarity of base (1*2/5, M) _________ _________ 7.Average molarity of base _________

Answers

Answer:

[tex]V_B = 18.3mL[/tex] -- Volume of base used

[tex]M_B = 0.0175M[/tex] --- Molarity of base

Explanation:

Given

[tex]V_A = 20mL[/tex] -- Volume of acid used

[tex]V_B_1 = 18.6mL[/tex] --- Buret Initial reading

[tex]V_B_2 = 36.9mL[/tex] --- Buret Final reading

[tex]M_A = 0.016M[/tex] --- Molarity of the acid

Solving (a): Volume of base used (VB)

This is calculated by subtracting the initial reading from the final reading of the base buret.

i.e.

[tex]V_B = V_B_2 - V_B_1[/tex]

[tex]V_B = 36.9mL - 18.6mL[/tex]

[tex]V_B = 18.3mL[/tex]

Solving (b): Molarity base (MB)

This is calculated using:

[tex]M_A * V_A = M_B * V_B[/tex]

Make MB the subject

[tex]M_B = \frac{M_A * V_A }{V_B}[/tex]

This gives:

[tex]M_B = \frac{0.016M *20mL}{18.3mL}[/tex]

[tex]M_B = \frac{0.016M *20}{18.3}[/tex]

[tex]M_B = \frac{0.32M}{18.3}[/tex]

[tex]M_B = 0.0175M[/tex]

Solving (c): There is no such thing as average molarity

How many moles are in 8.30 X 1023 molecules of H2O? with the step

Answers

Answer:

Answer: 1.38 moles

Explanation: According to Avogadro's law, 1 mole of every substance contains Avogadro number of particles (atoms, molecules or ions) i.e.6.023*10^23  particles.

Given : 1 mole molecule of water contains 6.023*10^23 molecules of water.

6.023*10^23  molecules are present in = 1 mole

 8.30*10^23molecules will be present in =

1/6.023*10^23 ×8.30*10^23=1.38 moles

Thus  molecules is equal to 1.38 moles.

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Which of the following sentences uses commas correctly?
-----------------------------------------------------------------------------------------------------------------------------
I got all of the answers on the test correct, didn't I?
I, got all of the answers on the test correct didn't I?
I got all of the answers, on the test correct didn't I?
I got all of the answers on the test, correct didn't I?

Answers

The first choice is correct. That’s because it uses the comma to pause the sentence, so the statement and question fit together
Answer: I got all of the answers on the test correct, didn't I?Explanation: Because it makes more sense

Find the total mass in kilograms of a ring that contains a 5.0 x 10 -1 carat diamond and 7.00 grams of gold.

Answers

Answer:

49 вот правильный ответ

How many atoms are in 12 moles of sodium?

Answers

Answer: There are 1.20 x 1024 atoms of sodium in 2 moles

Explanation:

As human populations grow, it becomes more important to use renewable sources of energy. Which of the following objects uses energy from a renewable source?
A-a stove that is powered by natural gas

B- a refrigerator that runs on solar power

C- a lantern that burns oil from beneath Earth's surface

D- a toaster that uses electricity from a coal-burning power plant

Answers

B

explanation:
it’s common sense

mineral and nutrient solution is in water epiphyte plants or hydroponic plants

Answers

Answer:

hydro ponic plants

Explanation:

coz they are hydro

All of the following are physical changes except
A. ice melting.
B. plaster hardening.
C. paint drying.
D. rocket fuel burning.

Answers

Answer:

rocket fuel burning i think

What is the correct name for Cr2O3?

A. Chromium trioxide
B. Chromium(III) oxide
C. Dichromium trioxide
D. Chromium(II) trioxide ​

Answers

B is correct
Hope that helped
The answer would be B! I hope this helps!

Which of the following can be calculated from the mass of the reactants used in a chemical reaction? (Select all that apply)
Theoretical yield of products
Amount of limiting reactant used in a reaction
Actual yield of products
Amount of excess reactant from a reaction

Answers

Answer:

Can you explain it more please

Explanation:

Mass of hydrated copper sulfate in CuSo4.5H2O​

Answers

Answer: Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.

Explanation:

Molar mass is the mass of 1 mole of the molecule. It is calculated by adding masses of all the atoms in the given molecule.

[tex]CuSO_4.5H_2O[/tex] contains one atom of copper , 1 atom of sulphur, 9 atoms of oxygen and 10 atoms of hydrogen

Mass of copper = 63.5  g/mol

Mass of sulphur =  32.06 g/mol

mass of oxygen = 16.00 g/mol

Mass of hydrogen = 1.008 g/mol

 Thus mass of [tex]CuSO_4.5H_2O[/tex] = 63.5(1)+32.06(1)+16.00(9)+1.008(10)=249.68 g

Molar mass of [tex]CuSO_4.5H_2O[/tex] is 249.68 g/mol.

The density of pentanol, C3H20, is 0.8110 g/mL. Calculate the volume occupied by 7.455 moles of pentanol. What is the volume occupied by 7.455 moles of pentanol?

Answers

The volume occupied by 7.455 moles of pentanol is 553.5 mL or 0.5535 L.

What does molar mass of a compound signify?

The molar mass of a given compound is the mass of one mole of that compound. It is expressed in unit as grams per mole (g/mol).

To calculate the volume of pentanol occupied by 7.455 moles of the substance, we can use the following formula:

Volume = (number of moles x molar mass) / density

The molar mass of pentanol (C3H8O) can be calculated as:

3 x atomic mass of carbon (12.01 g/mol) = 36.03 g/mol 8 x atomic mass of hydrogen (1.01 g/mol) = 8.08 g/mol 1 x atomic mass of oxygen (16.00 g/mol) = 16.00 g/mol Total molar mass = 60.11 g/mol

Placing the given values into the formula, we get:

Volume = (7.455 mol x 60.11 g/mol) / 0.8110 g/mL Volume = 553.5 mL or 0.5535 L

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What kind of questions do scientists ask?

A. Ones that there are no right answers to
B. Ones that only deal with scientific issues
C. Ones that deal with matters of opinion
D. Ones that are answered through observing​

Answers

ones that are answered through observing :)

Answer: D.

Explanation:

ones that are answered through observing.

How does a temperature increase cause the rate of a reaction to increase?
A. It increases the kinetic energy of the molecules.
B. It decreases orientation requirements of the molecules.
C. It increases the equilibrium constant for the reaction.
D. It decreases the activation energy of the reaction.

Answers

Answer:

B

Explanation:

"The temperature increases cause the rate of a reaction to increases the kinetic energy"

What is rate of reaction?

The reaction rate, also known as the rate of reaction, is the rate for which a chemical reaction occurs, and is proportional to increase in product concentration per unit time and the reduction in reactant concentration per unit time. The rate of reaction varies greatly.

What is kinetic energy?

An object's kinetic energy is the energy it has as a result of its motion. It is the amount of work required to push a body of a given mass from rest to a certain velocity. The body keeps its kinetic energy gained during acceleration unless that speed changes.

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kylie jenner wants to test if red or pink lipstick makes her lips look bigger. what is the independent variable here?

Answers

Answer:

her ugly duck lips

Explanation:

Answer:

her lips.

Explanation:

the dependent variable is the lip stick because it changes but her lips do not actually change at all, ......i think. ;)

The vapor pressure of liquid pentane, C5H12, is 40.0 mm Hg at 244 K. A sample of C5H12 is placed in a closed, evacuated container of constant volume at a temperature of 409 K. It is found that all of the C5H12 is in the vapor phase and that the pressure is 62.0 mm Hg. If the temperature in the container is reduced to 244 K, which of the following statements are correct?

a. No condensation will occur.
b. The pressure in the container will be 100. mm Hg.
c. Only pentane vapor will be present.
d. Some of the vapor initially present will condense.
e. Liquid pentane will be present.

Answers

Answer:

b. The pressure in the container will be 100mm Hg.

d. Some of vapor initially present will condense.

Explanation:

The vapor pressure of liquid Pantene rises when there is container where evacuation of water molecules is restricted. The pressure inside the container rises to 100 mm Hg and then liquid molecules start condensing. These molecule form vapors.



Circuit A has a resistance of 7.5 ohms, and circuit B has a resistance of 5 ohms. Which statement about the circuits must be correct?


If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is equal to the current in circuit B


If the current in circuit A is equal to the current in circuit B, then the voltage in circuit A is less than the

voltage in circuit B


If the current in circuit A is less than the current in circuit B, then the voltage in circuit A is less than the

voltage in circuit B


If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the

current in circuit B

Answers

Answer:

If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the current in circuit B

Explanation:

To know the the correct answer to the question, do the following:

Case 1: Let the circuit A and B have equal voltage say 24 V.

For Circuit A:

Voltage (V) = 24 V

Resistance (R) = 7.5 ohms

Current (I) =?

V = IR

24 = I × 7.5

Divide both side by 7.5

I = 24 / 7.5

I = 3.2 A

For Circuit B:

Voltage (V) = 24 V

Resistance (R) = 5 ohms

Current (I) =?

V = IR

24 = I × 5

Divide both side by 5

I = 24 / 5

I = 4.8 A

Thus for the same voltage, current in circuit A is less than the current in B.

Case 2: Let circuit A and B have equal current say 2 A

For circuit A:

Current (I) = 2 A

Resistance (R) = 7.5 ohms

Voltage (V) =?

V = IR

V = 2 × 7.5

V = 15 V

For Circuit B:

Current (I) = 2 A

Resistance (R) = 5 ohms

Voltage (V) =?

V = IR

V = 2 × 5

V = 10 V

Thus, for the same current, the voltage in circuit A is greater than the voltage in B

Case 3: Let circuit A have a current of 4 A and circuit B have a current of 5 A

For circuit A:

Current (I) = 4 A

Resistance (R) = 7.5 ohms

Voltage (V) =?

V = IR

V = 4 × 7.5

V = 30 V

For circuit B:

Current (I) = 5 A

Resistance (R) = 5 ohms

Voltage (V) =?

V = IR

V = 5 × 5

V = 25 V

Thus, when the current in circuit A is less than the current in circuit B, the voltage in circuit A is greater than the voltage in circuit B.

From the illustrations above and the options given in the question, the current answer is:

If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the current in circuit B

On another planet, the isotopes of titanium have the given natural abundances.
Isotope Abundance
Mass (u)
46Ti
70.600%
45.95263
48Ti
12.900%
47.94795
50Ti
16.500%
49.94479
What is the average atomic mass of titanium on that planet?

Answers

im pretty sure you do the number times the percentage converted to a decimal and then add the sums so (46*0.706)+(48*0.129)+(50*0.165)
32.476+6.192+8.25
=46.918 amu

*i dont trust my calc so pleasee check if the answer is right and also remember to convert a percent to decimal move the decimal back 2 places so like for 12.9% the decimal is gonna be 0.129

hope this helpss ask if you have questions

Is a burning log an exothermic or endothermic event if the log is the (system) ?

Answers

Answer:

Exothermic Reaction

Explanation:

Burning wood in air is an exothermic process (it releases heat), but there is an energy barrier, so it requires a bit of heat in the beginning to get the reactions started.

Wood reacts with oxygen in the air to form (mostly) carbon dioxide and water vapor. The process involves many different individual chemical reactions, and it requires some energy to initiate the reactions. This is because it's usually necessary to break some chemical bonds (endothermic) before new stronger bonds can be formed (exothermic). Overall, though, more heat is released in forming the final products than is consumed in starting new reactions.

Have a great day <3

In the given question, a burning log is an exothermic event if the log is the system.

An exothermic reaction releases energy to the surroundings, usually in the form of heat. The change in enthalpy is negative.

When a log burns, it reacts with oxygen in the air to produce carbon dioxide, water vapor, and heat. This heat is released to the surroundings, making the burning log an exothermic event.

Therefore, a burning log is an exothermic event if the log is the system. This is due to the fact that the reaction emits heat into the environment, making it an exothermic reaction.

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Silicon (chemical symbol Si) is located in group 14 Period 3. which is silicon most likely to be Which statement is true? Explain the trade between the North African Berbers and the Empires ofWest Africa. Factor out the GCF from the terms of the polynomial 2x^3 5x^2 + 25. Find an ordered triple that represents 65 = (2, 6, 8) and = (1, -2, 6). true or false, henri cartier bred sons photos are not collected in any books and cant be seen online Can someone pls help me with this?? Im in a rush its due at 11:59 pm..pls help! And show work pls and thx From Selfie: The Changing Face of Self-Portraitsby Susie Brooks The Changing Face of Self-Portraits.Which sentence uses reflection in the same way it is used in paragraph 4? Fill in the blanks with appropriate prepositionsa) My grandfather is always complaining__________the pain in his leg b) Shreya will be coming__________Chandigarh after her visit to Shimla.c) They're going_______work early today.d) I am waiting______the postman.e) The crow is peeping________the jar.f) I was angry_______my brother for spoiling my project.g) The progress of a country depends_______its citizens.h) My hands are too big to go________the gloves.I) A small child depends______his mother for food.j) He is worried______his result. _:7 = 24 : 56A.2 B.3 C.4 D.5 2. (04.03 MC) Which component is missing from the process of cellular resplration? Glucose + Carbon Dioxide + Water + Energy a Sunlight b Sugarc Oxygen d Carbon -Ms. Gorman says, Then victory wont lie in the blade, but in all the bridges weve made. What does she mean by bridges?please help Which of the following items would best fulfill a need?a) automobileOb) foodc) shoesd) a Play Station Jackson believed his victory in the Presidential election was a(n) ___ for him to end the national bank.opportunitysignedictmandateproposal Emotive language should be used subtly in speeches.A. TrueB. False Tides are caused by gravity of the__1. Earth and sun2.earth and moon3.moon and stars4.sun and moon what are all the sums and differences of 3/4? Alex created a map of his neighborhood using a scale of 1 inch = 2 blocks. If his street is 6 blocks long, how long will it be on the map? a ) 12 inches b ) 3 inches c ) 6 inches d ) 2 inches 12345678910= What is a main difference between Mercury and Neptune? Mercury is an inner planet with a thicker atmosphere and a longer year than Neptune. Mercury is an inner planet with a thinner atmosphere and a shorter year than Neptune. Neptune is an inner planet with a thicker atmosphere and a shorter year than Mercury. Neptune is an outer planet with a thinner atmosphere and a shorter year than Mercury.