Do you think a chemical reaction occurs every time two substances are placed together in a reaction vessel?

Answers

Answer 1

Answer:

Not necessarily.

Explanation:

Answer 2
DIS NUTSS NA JK, nooooooo o o o

Related Questions

how many moles of water are required to produce 2.15 mol oxygen gas in this reaction

Answers

How am I supposed to know >:(

What is your observation of the relationship between m and a

Answers

Answer:

They are both letters?

Explanation:

BF3
What is The calculation and bond type

Answers

Bond order is 1 1/3 the type of bond is it’s a covalent bond

Plants absorb water in the soil through their roots and pump this water up to deliver
nutrients to their leaves. This pumping is driven by the evaporation of water through
small pores on the undersides of leaves. What is this process called?
A)germination
B)pollination
C)respiration
D)transpiration

Answers

It is transpiration.

Which statement about copper, diamond, and silicon(IV) dioxide is correcta)Copper and silicon(IV) dioxide have similar electrical conductivityb)In diamond the carbon atoms are covalently bonded as flat sheetsc)In silicon(IV)dioxide the silicon and oxygen atoms are covalently bonded in flat sheetsd)The structure of copper includes a lattice of positive ions

Answers

Answer:

In diamond the carbon atoms are covalently bonded as flat sheets

In silicon(IV) dioxide the silicon and oxygen atoms are covalently bonded in flat sheets

The structure of copper includes a lattice of positive ions

Explanation:

Diamond and silicon(IV) dioxide are covalent network solids. Covalent network solids are made up of atoms joined to one another by covalent bonds to form a giant lattice, The solids are hard and have a very high melting point. They do not conduct electricity. So, for both diamond and SiO2, atoms are covalently bonded to yield flat sheets in a covalent bonded network solid.

Copper is a metallic substance having metallic bonds, a metallic crystal consists of positive ions and a cloud of electrons.

A scientist is comparing 2 samples of the same compound. One is pure and the other is impure. The compound is a solid at room temperature. Explain how the scientist could tell which is the pure compound. [2]

Answers

Answer:

A glass of mineral water is not pure water.

Explanation:

Pure chemical substances

Pouring water into a glass from a bottle

Food and drink may be advertised as ‘pure’. For example, you may see cartons of ‘pure orange juice’ or ‘pure mineral water’. This means that nothing else was added to the orange juice or mineral water during manufacture. However, these substances are not pure to a scientist. In science, a pure substance contains only one element or compound.

Mineral water is mostly water, but there are other substances mixed with it. These are the ingredients that you see listed on the bottle’s label.

1s2, 2s2, 2p6, 3s2, 3p6, 4s2
How many shells does this atom have?

Answers

Answer:

4

Explanation:


A gas at 127 celsius and 10.0 L expands to 20.0 L. What is the new
temperature in kelvin? (You must convert to Kelvin before calculating
this problem

Answers

Answer:

800.3 Kelvin

Explanation:

127°C = 400.15 Kelvin   (because 127 + 273.15)

Charles Law:

[tex]\frac{V1}{T1} = \frac{V2}{T2}[/tex]   Thus, [tex]\frac{10.0 L}{400.15 K} = \frac{20.0 L}{T2}[/tex]

Then, work out the math algebraically.  

T2 = 20.0 / (10.0/400.15)

= 20.0 / 0.02499...

= 800.3 Kelvin

This is assuming the pressure remains constant.

ssignment Vhat challenges would have existed in the spread of Christianity. pe overcome. Remember social media and cell phones did not exis R < previous​

Answers

Answer:

A lot of people rejected it outright. Christians were persecuted and killed for their beliefs, and there were no cars, etc for easy transportation. Most people had to walk everywhere since horses and the like were only for the rich and royal. Hope this helps, please give me brainliest :)

Explanation:

Answer: Your not the best a spelling...

Explanation:

H3PO4 + HCI
PCI5+H2O

Answers

Answer:

Balanced Chemical Equation:

H3PO4 + 5HCl → PCl5 + 4H2O

I'll give Branliest to the most efficient and first answer.

1. What major change in our thinking about the path of a moving electron had to be made with the advent of quantum theory?

2. Calculate the wavelength of a space shuttle with a mass of 2.05 x 107kg traveling at a rate of 7.85 x 103 m/s. ​

Answers

Answer:

See explanation

Explanation:

1) With the advent of the quantum theory came the idea that the path of a moving electron can not be exactly determined. We can only talk about the probability of finding the electron within a given region in space.

2) Using the De Broglie's relation;

λ = h/mv

Where;

λ = wavelength

h = Plank's constant

m = mass

v = velocity

λ = 6.6 * 10^-34/2.05 x 10^7 * 7.85 x 10^3

λ = 4.1 * 10^-25 m


Wendy wants to find out if a substance is an acid or a base. What are two ways that Wendy could
investigate to find out what kind of substance it is?

Answers

If it is corrosive and sour, or bitter and smooth. Or, by its pH level.

Without tasting a colorless liquid, an acid or a base can be determined using indicators.

The three most common indicators to test for acids and bases are: Litmus. Methyl orange. Phenolphthalein.

How do you know something is an acid?One practical method for determining how acidic something is is to use the pH scale. A solution is acidic if its pH is less than 7. If the pH of the solution is 7, it is neutral; if the pH is greater than 7, it is basic.To identify acids and bases, two types of litmus paper are available: red litmus paper and blue litmus paper. When exposed to acidic conditions, blue litmus paper turns red, while red litmus paper turns blue when exposed to basic or alkaline conditions.

To learn more about :  Indicators

Ref : https://brainly.com/question/2815636

#SPJ2

A rain garden is a garden planted in a low-lying area where water tends to collect.
What benefit would rain gardens most likely provide for a community?

Answers

-Aesthetic, looks nice in the community.

-Environmental, reduces runoff of pollutants from the paved surface.

Determina la densidad de una barra dd hierro cuya masa ed de 160gr y su volumen es de 20,35cm³ ¿que volumen ocuparan 12g de hierro?

Answers

Answer:

15.26 cm³

Explanation:

La densidad de una sustancia se define como su masa por unidad de volumen:

densidad = masa/volumen

Tenemos los siguientes datos de la barra de hierro:

masa = 160 g

volumen = 20,35 cm³

Por lo tanto, la densidad de la barra de hierro es:

densidad = 160 g/20,35 cm³ = 0.786 g/cm³

El volumen de 12 gramos de hierro se calcula utilizando el dato de masa (12 g) y la densidad calculada:

densidad = masa/volumen  ⇒ volumen = masa/densidad

                                                                 = 12 g/(0.786 g/cm³)

                                                                 = 15.26 cm³

4 OT 5
A 35g chunk of metal at 130C was dropped in a bucket containing 220g of water at 25C. The final temperature of the mixture
was 300. What is the specific heat capacity of the metal?
(Specific heat for water: 4184 J/g C) Formula (m)(c)(T) = (m) (c)(T)

Answers

Answer: The specific heat capacity of metal is [tex]1.31J/g^0C[/tex]

Explanation:

[tex]Q_{absorbed}=Q_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]      

where,

[tex]m_1[/tex] = mass of metal = 35 g

[tex]m_2[/tex] = mass of water = 220 g

[tex]T_{final}[/tex] = final temperature = [tex]30^0C[/tex]

[tex]T_1[/tex] = temperature of metal = [tex]130^oC[/tex]

[tex]T_2[/tex] = temperature of water = [tex]25^oC[/tex]

[tex]c_1[/tex] = specific heat of metal = ?

[tex]c_2[/tex] = specific heat of water =  [tex]4.184J/g^0C[/tex]

Now put all the given values in equation (1), we get

[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex]

[tex]35\times c_1\times (30-130)^0C=-[220g\times 4.184\times (30-25)][/tex]

[tex]c_1=1.31J/g^0C[/tex]

Therefore, the specific heat capacity of metal is [tex]1.31J/g^0C[/tex]

What is the most basic level of biological organization?



Question 1 options:

Organism


Cell


Molecule


Atom

Answers

Answer:

molecule

Explanation:

Answer:

c

Explanation:

Who discovered the nucleus?

Answers

Ernest Rutherford i believe
Ernest Rutherford’s

Helppp
me plzzz!!!!

Answers

Answer:

Explanation:

The sound waves are bocing off the walls.  

HELPP!! I REALLY NEED TO BRING UP MY SCIENCE GRADE!!!!
Scientists studied the location of ____ to determine plate boundaries.

Answers

Answer:

Of earthquakes

Explanation:

Earthquake i think...

an example of xenon (Xe)

Answers

Answer: i am not sure what you mean but here are some product of xenon stroboscopic lamps, photographic flash lamps, high-intensive arc-lamps for motion picture projection, some lamps used for deep-sea observation, bactericidal lamps, sunbed lamps and high-pressure arc all use this gas. In fact, you probably see xenon lamps on a regular basis and if you want compounds : Xe2F2, XeF4, XeO3, XeF6....

Explanation:

A 250 mL glass of orange juice cantains 22 grams of sugar. How much sugar is in a two liter (2,000 mL) bottle of orange juice?​

Answers

Answer: 44000 g

Explanation:

For every 250mL of juice, there is 22g of sugar. So for 2000mL,

2000*22g = 44000g of sugar in the bottle of juice

please help me!! (brainliest)

Answers

Answer:

ok

Explanation:

explain what keeps the electrons confined in the space surrounding the nucleus

Answers

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

Which energy transformation describes what occurs in a circuit? (select
the BEST answer)
chemical --> electrical --> light
thermal --> chemical --> light
electrical --> thermal --> light
Olight --> thermal --> chemical

Answers

Answer:

electrical --> thermal --> light

Explanation:

Answer:

electrical--> thermal--> light

Why do you think males and children are more likely to die from DHMO

Answers

Answer:

Dihydrogen Monoxide (DHMO) is perhaps the single most prevalent of all chemicals that can be dangerous to human life. Despite this truth, most people are not unduly concerned about the dangers of Dihydrogen Monoxide. Governments, civic leaders, corporations, military organizations, and citizens in every walk of life seem to either be ignorant of or shrug off the truth about Dihydrogen Monoxide as not being applicable to them. In 1997, the Dihydrogen Monoxide Research Division was formed and went online spreading the truth about DIHYDROGEN MONOXIDE. As word has spread, so too has the public awareness of Dihydrogen Monoxide and its implications involving the Internet and accessibility of such information. To that end, the DMRD's web site at DHMO.org continues to provide the most comprehensive collection of Dihydrogen Monoxide information available anywhere.

Explanation:

DHMO has been the dihydrogen monoxide. It has been responsible for the death of males and children as it causes tissue damage.

The DHMO has been the hydric acid and is one of the major constituents of acid rain. Gas has been responsible for greenhouse gas. Ingestion may lead to tissue damage with symptoms of nausea, vomiting, and electrolyte imbalance.

The companies dumping waste in the rivers and lakes have been warned for the removal of DHMO as it has been harmful to the males and children, and results in death.

For more information about Dihydrogen Monoxide, refer to the link:

https://brainly.com/question/14898986

why and how do ions form?

Answers

Answer and Explanation:

Ions are electrically charged particles that are formed from the removing and addition of electrons. It can be a positively or negatively charged atom.

This image shows a...​

Answers

Answer:

I think is the last one!!!! punnet square ⬜

MARKING BRAINLIEST

options: Tempature
solid
melting point
time
condensation point
gas
freezing point
liquid
boiling point

Answers

Answer:

I LIKE TRAINS

Explanation:

SNAILS ARE YUMMY

N2 + 3H2 → 2NH3 How many grams of hydrogen are necessary to react completely with 853.42g of nitrogen in the above reaction?

Answers

Answer: 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

Explanation:

The balanced chemical reaction is :

[tex]N_2+3H_2\rightarrow 2NH_3[/tex]

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]  

[tex]\text{Number of moles of nitrogen}=\frac{853.42g}{28g/mol}=30.479moles[/tex]

According to stoichiometry:

1 mole of [tex]N_2[/tex] react with = 3 moles of [tex]H_2[/tex]

30.479 moles of [tex]N_2[/tex] will react with=[tex]\frac{3}{1}\times 30.479=91.437moles[/tex] of [tex]H_2[/tex]

 Mass of [tex]H_2[/tex] =[tex]moles\times {\text {Molar mass}}=91.437mol\times 2g/mol=182.87g[/tex]

Thus 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

There are three main parts to any dissolution which result in an energy change, either endothermic or exothermic. Consider the dissolution of sodium chloride and explain what each of these three major energy changes are.

Answers

Answer:

The dissolution of sodium chloride involves three steps. During the process energy changes occur in:

1. breaking apart the hydrogen bonds between water molecules,

2. breaking apart the electrostatic bonds between sodium and chloride ions, and

3. when bonds are formed between water molecules and aqueous ions in solution.

Since the energy used to break apart the hydrogen bonds between water molecules and the energy used to break apart the electrostatic bonds between sodium and chloride ions, is greater than the energy released when bonds are formed between water molecules and aqueous ions in solution, the dissolution of sodium chloride is endothermic.

Explanation:

The heat of solution or enthalpy of solution/dissolution, is the enthalpy change that occurs with the dissolution of a solute in a solvent at constant pressure, resulting in infinite dilution. Its unit is kJ/mol for reactions taking place under standard conditions (298.15 K and 1 atm).

The process of dissolution occurs in three energy-dependent steps:  

1. The breaking of bonds within the solute. For example, electrostatic forces of attraction between two oppositely-charged ions. This process is endothermic.

2. The endothermic process of breaking of intermolecular forces within the solvent, e.g. hydrogen bonds in water.

3. The exothermic process of the formation of new solute-solvent bonds in solution.

The sum of the energies involved in these three steps gives the enthalpy of dissolution of a solute. The overall process of dissolution can either endothermic or exothermic depending on the amount of energy used or released in breaking and making bonds. If more energy is released in making than is used in breaking bonds, it is exothermic.  However, if more energy is used in breaking bonds than is released in making bonds, dissolution is then endothermic.

For example, considering the dissolution of sodium chloride. During the process the energy used to break apart the hydrogen bonds between water molecules and the energy used to break apart the electrostatic bonds between sodium and chloride ions, is greater than the energy released when bonds are formed between water molecules and aqueous ions in solution. Therefore, the dissolution of sodium chloride is endothermic.

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