The picture represents _________________.

A . Compounds

B . Mixture of Elements and Compounds

C. Mixture of Elements

D. Elements

E. Mixture of Compounds

Answer:

X = 4

Explanation:

Start 2800

End 175

175 = 2800x(0.5)^X

175/2800 = 0.5^X

0.0625 = 0.5^X

log(0.5 x) = log(0.0625)

x · log(0.5) = log(0.0625)

-0.301x = -1.204

x = -1.204/-0.301

x = 4

Answer:

2CO + O ₂ → 2CO ₂

Explanation:

CO + O ₂ → CO ₂

Left Side

C = 1

O = 3

Right Side

C = 1

O = 2

So we'll balance the oxygen first

2CO + O ₂ → 2CO ₂

Left Side

C = 2

O = 4

Right Side

C = 2

O = 4

Ok so balancing the O has also balanced the C

Answer:

Renewable energy require less overall maintenance than generators that use traditional fuel sources. Renewable energy has numerous health and environmental benefits.

Explanation:

Answer:

In the year 1850, Rudolf Virchow was studying cells under a microscope, when he observed that cells were dividing and forming new cells. Realizing what he had observed, he understood that living cells reproduce new cells through division

If the polar ice caps were to melt then it could lift the lid of a new carbon sink capable of soaking up carbon dioxide.

If all the ice protecting Antarctica, Greenland, and mountain glaciers around the sector were to melt, sea degrees might upward push about 70 meters (230 ft). the sea might cowl all of the coastal towns. And the land place would decrease considerably. but many cities, inclusive of Denver, might live to tell the tale.

Melting ice reasons more warming.

because they are darker in the shade, the ocean and land take in more incoming solar radiation and then launch the warmth to the environment. This reasons more global warming. in this way, melting ice causes more warming and so extra ice melts.

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Answer:

D

Explanation:

To solve this we must be knowing each and every concept related to  activity series. Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.

We refer to the metal series in the image above as the activity series. This serves as a guide so that we can identify the byproducts of a metal displacement process. For displacement to take place, a metal must be placed over the other metallic combination.

Ag is significantly lower than Na in the series so, nothing happens. Since Al is above Fe, there is no response. Ni is below Na, hence no reaction will take place. A displacing reaction will happen because Fe is a greater active metal than copper.

Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.

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Answer:

1.6

Explanation:

log 43 = 1.6335

B, 1.6

Explanation: E21

Answer:

Conjugate acid is H3O

Explanation:

HCl + H2O = H3O + Cl

HCl = H+ and Cl- = Acid

H2O = OH- and H+ = Neutral as equal OH- and H+

H3O = H3O+ = Acid also known as Hydronium

Cl = Just free floating Chlorine = Cl-

Conjugate acid is H3O

Acid = A solution with more H+ ions than OH- ions.

Answer:

They can warm up the water. Sugar dissolves much faster in warm/hot water.

A perfect example of this is when you put sugar in your hot coffee/tea -> it will dissolve almost immediately. If you put sugar in cold water, you will have to stir it for quite some time before it dissolves.

Answer:

Kinetic

Explanation:

potential means it has the POTENTIAL to move, gravitational potential energy is when an object isn't moving but the it turns into gravitational kinetic energy since gravity causes it to move. since the object in question is already in motion it proves kinetic energy as the answer.

Answer:

it is Dead plants fall in swamp, Layers of dead plants pile up, Plant matter is buried by rocks and dirt, Plant matter is compressed and is exposed to heat, and Coal forms.

if iam right please make this into brainlest

Answer:

base drugs

Explanation:

The pH scale is a scale graduated from 0-14. It is used as an indicator of the degree of acidity or alkalinity. A pH of 0-6.9 indicates acidity. A pH of 7 indicates that the solution is neutral. A solution of pH above 7 indicates that the substance is basic.

It is thus a correct statement to say that any substance that dissolves in solution to produce a solution of pH greater than 7.0 is a basic substance.

If we look at the options closely, it is only a basic drug that will dissolve in water to yield a basic solution of pH greater than 7.0 hence the answer.

Answer:

0.472 grams of aluminum oxide would be produced from the reaction of 0.25 grams of aluminum with excess oxygen gas.

Explanation:

First of all, you should know that the balanced reaction that occurs:

4 Al + 3 O₂ → 2 Al₂O₃

Then, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts are produced in moles:

Being:

The molar mass of the compounds participating in the reaction is:

Then, by stoichiometry of the reaction, the following amounts of mass react and are produced:

Now it is possible to apply the following rule of three: if 108 grams of Al produce 204 grams of Al₂O₃, 0.25 grams of aluminum how much mass of Al₂O₃ will it produce?

[tex]mass of Al_{2} O_{3} =\frac{0.25 grams of Al*204 grams of Al_{2} O_{3} }{108 grams of Al}[/tex]

mass of Al₂O₃=0.472 grams

0.472 grams of aluminum oxide would be produced from the reaction of 0.25 grams of aluminum with excess oxygen gas.

Answer:

D

Explanation:

Answer:

Ammonia accepts a proton from water

Explanation:

Let us quickly remind ourselves of the Brownstead-Lowry definition of an acid. According to Brownstd-Lowry, an acid is any substance that donates hydrogen ions while a base is any substance that accepts hydrogen ions. The hydrogen ion is also known as a proton.

If we look at the behaviour of ammonia in water;

NH3(g) + H2O(l) ----> NH4^+(aq) + OH^-(aq)

We can easily see that ammonia accepts a proton from water (this makes it a Brownstd-Lowry base) and the hydroxide ion is formed in the process. Water functions as the proton donor here.

Answer:

D. Weight

Explanation:

Answer:

Weight

Explanation:

Answer via Educere/ Founder's Education

Answer:

The answer is B.

Explanation:

A P E X

Answer:

Which of the following are not examples of matter, well clouds are matter, gasoline is matter, ice is matter, so it would be light.

Answer:

4.38 Grams of C

Explanation:

How many grams of C are required to react with 52.6grams of Fe2O2?

Fe2O2 + C = 2Fe + CO2

Ratio 1:1

Fe2O2 = 144 Molar Mass

Fe2O2 52.6/144 = 0.365Moles of Fe2O2

Fe =56grams/mole =  Charge 2+, 3+

O = 16grams/mole = Charge 2-

C = 12grams/mole = Charge 4+

So Ratio is 1:1 so we only need 0.365Moles of C so 4.38grams

Answer:

Question 1

Which type of bond describes the coming  together and sharing of two unpaired outer  electrons, one from each atom?

A. Single covalent bond.

Definition of single covalent bond:

A single covalent bond is when only one pair of electrons is shared between atoms.

Question 2

What is the name of this molecule (CO2) that  forms by burning of fuels and is one of the  gases that contributes to global  warming/climate change?

C. Carbon dioxide.

Answer:

Explanation:

loss of habitat and contact with humans

Answer:

A

Explanation:

Loss of habitat and contact with humans contributed to the extinction of many large mammals.

Answer: A)  0.20 L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the neutralization law,

[tex]M_1V_1=M_2V_2[/tex]

where,

[tex]M_1[/tex] = molarity of stock [tex]H_2SO_4[/tex] solution = 10.0 M

[tex]V_1[/tex] = volume of stock [tex]H_2SO_4[/tex]   solution = ?

[tex]M_2[/tex] = molarity of dilute [tex]H_2SO_4[/tex]  solution = 0.50 M

[tex]V_2[/tex] = volume of dilute [tex]H_2SO_4[/tex]  solution = 4.0 L

[tex]10.0\times V_1=0.50\times 4.0[/tex]

[tex]V_1=0.20L[/tex]

Therefore, the volume of 10.0 M [tex]H_2SO_4[/tex] solution needed to prepare 4.0 L of 0.50 M [tex]H_2SO_4[/tex] is 0.20 L

Answer:

N = -3

H = +1

O = -2

Cl = +1

Explanation:

The balanced Equation of the reaction above is:

NH3 + 3HOCl ----> NCl3 + 3H2O

Where NH3 is ammonia;

HOCl is Oxochlorate (I) acid

NCl3 is nitrogen trichloride

H2O is water

Nitrogen in both Ammonia and Nitrogen trichloride has an oxidation state of -3. It shares three electrons with each of the three atoms of hydrogen and chlorine

Hydrogen in both Oxochlorate (I) acid and in water has an oxidation state of +1. Each atom shares an election with oxyen in both compounds.

Oxygen in both Oxochlorate (I) acid and water has an oxidation state of -2. Each atom shares two electrons with neighboring atoms; in HOCl, it shares with chlorine and hydrogen, while in H2O, it shares with two atoms of hydrogen.

Chlorine in both Oxochlorate (i) acid and Nitrogen trichloride has an oxidation state of +1. It shares an electron with each of it's neighboring bonded atoms.

Answer:

in explanation

Explanation:

Human hands are distinguished from apes by possessing longer thumbs relative to fingers.

Hope this helps!!!

Answer:

The human hand and primate hand both have finger prints and palm prints, or palmar whorls, but the prints differ. Human fingerprints have a higher ride density than primate fingerprints, which means the print ridges, or lines, are closer together. While the human’s prints are denser, primates usually have more lines overall.

Explanation:

I've learned this before

Answer:

Conversing the conditional statement is nothing but switching the hypothesis and conclusion. Therefore, the converse of the given conditional statement will be “If x is odd, then x+1 is even.

Explanation:

The converse of the conditional statement is if x is odd, then x+1 is even.

A conditional statement is defined as a specific kind of compound sentence that meets the "if...then" requirement. If the hypothesis is correct but the conclusion is untrue, a conditional statement is false. Programming language elements called conditional statements, expressions, or simply conditionals instruct the computer to take specific actions.

Reversing the two statements that make up a categorical or implicational statement yields its opposite. Carry on a discussion is more properly referred to as "converse." Let's say there is a conditional statement of the form "If p then q." If q, then p is the converse. In a symbolic sense, q p is the opposite of p q. The reverse of a conditional assertion is not logically comparable.

Thus, the converse of the conditional statement is if x is odd, then x+1 is even.

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Answer:

Cytoplasm

Explanation:

Cytoplasm is a jellylike substance within cells.

Answer: he is right

Explanation:

Answer:

Steel is a metallic bond

Propane is a covalent bond

Calcium Chloride is an Ionic Bond

Water is a covalent bond

Explanation:

ence a material's properties, identify each of the , ionic, covalent, or metallic bonds

Ionic Bonds are where the extra outer electron of one atom transfers to the other atom.

Covalent Bonds are where the outer electron of one atom takes the open path to the nucleus (negative valance) of a 2nd atom.

Metallic Bonds are formed from the attraction between free electrons and fixed positively charged metallic atoms. Metallic bonds extend over the entire molecular structure.

Substance                  Properties

Steel                           Conducts electricity as solid and liquid

Propane                      Low melting point

Calcium Chloride       Conducts electricity when dissolved in water

Water                          Solid form is brittle, melts at 0C

Steel is an alloy of carbon, iron and other things

Propane = C3H8 C4- H+

Calcium Chloride  = CaCl2 = Ca2+ Cl-

Water = H2O = OH- and H+

Answer: A. Electrons are knocked off atoms, causing electricity to flow.

Explanation:

Photoelectric effect is defined as emission or ejection of electrons from the surface of a metal when a light of certain frequency falls on the surface of the metal. Electrons emitted in this effect can be called photoelectrons.

The light which falls on the surface of the metal must be of sufficiently high frequency called as threshold frequency.

Thus light knocks off the electrons and thus the flow of electrons will result in the production of electricity.

Thus the correct option is Electrons are knocked off atoms, causing electricity to flow.

Answer:

cold temperatures slow the rate at which the cells die.

Explanation:

the answer is c

The correct answer is option C. Cold temperatures slow the rate at which cells die.

Temperatures between 46 ° C and 60 ° C are associated with irreversible cell damage proportional to exposure time (8, 9). Protein coagulation occurs quickly between 60 ° C and 100 ° C, causing irreversible damage to important cytosol and mitochondrial enzyme-nucleic acid-histone complexes.

Cold temperatures can also slow down cell growth by preventing cell hypertrophy. In extreme situations,  Prolonged exposure to freezing temperatures can cause intracellular fluids to begin to freeze, forming crystals that penetrate the membrane and eventually kill the cells.

Perhaps by reducing elasticity and preventing the uptake of lipid substances into the expanding membrane. Tissue swelling at low temperatures causes lesions in the cell membrane and can cause cold wounds.

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