What are the three (3) things involved in stoichiometry problems???

Answer:

hi

Explanation:

Answer:

C

Explanation:

cell theory states:

all living things are made of 1 or more cells

all cells come from pre-existing cells

the cell is the basic unit of structure

Answer:What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant

The correct option is (b)

Explanation:

A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).

A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.

Explanation:

The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. ... This method is most useful when there are only two reactants. The limiting reagent can also be derived by comparing the amount of products that can be formed from each reactant.

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Answer:

I would describe it as a amount of water that builds up and jumps up into the air and then splashes back down into the water like it was never there.

Explanation:

Answer:

16.6 g of Al are produced in the reaction of 82.4 g of AlCl₃

Explanation:

Let's see the decomposition reaction:

2AlCl₃ →  2Al  + 3Cl₂

2 moles of aluminum chloride decompose to 2 moles of solid Al and 3 moles of chlorine gas.

We determine the moles of salt:

82.4 g . 1mol/ 133.34g = 0.618 moles

Ratio is 2:2. 2 moles of salt, can produce 2 moles of Al

Then, 0.618 moles of salt must produce 0.618 moles of Al.

Let's convert the moles to mass → 0.618 mol . 26.98g /mol = 16.6 g

Answer:

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.

Explanation:

Brainliest please

Answer:

Explained below.

Explanation:

From avogadro's number, we know that;

1 mole = 6.022 × 10^(23) atoms, molecules, protons e.t.c.

Now,to convert from atoms, compounds, formula units, etc to moles, what we will do is just to divide the amount of the particle value given in the specific units by avogadro's number.

For example, to convert 23 × 10^(20) atoms to moles, we will have;

Number of moles = (23 × 10^(20))/(6.022 × 10^(23)) moles = 0.00382 moles

Answer:

Draw the example below

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Hope it helps.

If you have any query, feel free to ask.

Answer:

not sure but I think its b

Answer:

the answer is about your question isb.floods

Answer:

Explanation:

1. New substances such as carbondioxide and water is formed.

2. There is evolution of gas bubbles. Gases are released.

3. There is either the absorption of energy or release of energy in form of light and energy.

4. The reaction is irreversible i.e it cannot be reversed, it is permanent once the reaction take place.

5. There is a change in both odor and smell.

A chemical change is a change where new substances are formed due to changes in the properties.

The second quantum number (l) describes which sublevel the electron is in

Answer:

Yes it is a colligative Property

Explanation:

There is freezing point depression, boiling point elevation, Osmotic Pressure, Vapor Pressure Lowering

Answer: a tundra is at a higher latitude than a desert.

The environments of a desert and a tundra different because tundra is at a higher latitude than a desert. Therefore, option A is correct.

Temperature is the primary distinction between desert and tundra biomes. The desert has very warm temperatures, which can become extremely hot at times.

Extreme temperatures in some deserts can exceed 130 degrees Fahrenheit. Tundras are extremely cold, with many areas remaining frozen throughout the year.

Tundra regions typically receive less than 25 centimeters (10 inches) of precipitation per year, making them deserts. For six to ten months of the year, they have long, cold winters with high winds and average temperatures below freezing.

Thus, option A is correct.

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Answer:

In order to obtain a volume of

1 L

,

500 mL

of water must be added to the original solution of

500 L

.

Explanation:

Answer:

It could pollute other planets. Nuclear waste might be attracted by the gravitational pull of the sun and disintegrate there instead. The waste storage spacecraft could crash into a planet, moon, or another astronomical body. It could be dangerous for other life forms out there.

Explanation:

Answer:

Pangea

Explanation:

Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and began to break apart about 175 million years ago. Forming into what we have today :)

Answer:

Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy. The importance of photosynthesis in our life is the oxygen it produces. Without photosynthesis there would be little to no oxygen on the planet.

Answer:

a) pH = 9.82     b) pH = 1.65

a) pOH = 7.8     b) pOH = 4.45

Explanation:

pOH + pH = 14 for all of these solutions.

pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

3.a)Given;

pOH = 4.18

To Find;

pH = ?

We know that

pH + pOH = 14

pH = 14 – pOH

pH = 14 – 4.18

pH = 9.82

Thus, The pH of the solution is 9.82

b)Given;

pOH = 2.35

To Find;

pH = ?

We know that

pH + pOH = 14

pH = 14 – 2.35

pH = 14 – 2.35

pH = 11.65

Thus, The pH of the solution is 11.65

4. a)

Given;

pH = 6.2

To Find;

pOH = ?

We know that

pH + pOH = 14

pOH = 14 – pH

pOH = 14 – 6.2

pOH = 7.8

Thus, The pOH of the solution is 7.8

4. b)

Given;

pH = 9.55

To Find;

pOH = ?

We know that

pH + pOH = 14

pOH = 14 – pH

pOH = 14 – 9.55

pOH = 4.45

Thus, The pOH of the solution is 4.45

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Explanation:

i have done

see the picture

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Answer:

10.3125 grams of carbon dioxide will be formed.

Explanation:

The balanced reaction is:

C₃H₈ + 5 O₂→ 3 CO₂ + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles participate in the reaction:

Being the molar mass of the compounds:

then by stoichiometry of the reaction, the following amounts of mass participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: If by reaction stoichiometry 44 grams of propane react with 160 grams of oxygen, 7.2 grams of propane react with how much mass of oxygen?

[tex]mass of oxygen=\frac{7.2 grams of propane*160 grams of oxygen}{44 grams of propane}[/tex]

mass of oxygen= 26.18 grams

But 26.18 moles of O₂ are not available, 12.5 grams are available. Since you have less mass than you need to react with 7.2 grams of propane, oxygen O₂ will be the limiting reagent.

Then you can apply the following rule of three: if by stoichiometry of the reaction 160 grams of oxygen form 132 grams of carbon dioxide, 12.5 grams of oxygen will form how much mass of carbon dioxide?

[tex]mass of carbon dioxide=\frac{12.5 grams of oxygen*132 grams of carbon dioxide}{160 grams of oxygen}[/tex]

mass of carbon dioxide= 10.3125 grams

10.3125 grams of carbon dioxide will be formed.

Answer:

1250joules

Explanation:

The kinetic energy is energy in motion and it's formula is

KE =1/2MV^2

M represent mass which is 100Kg.

V represent velocity which is 5m/s

Therefore, KE = 1/2×100×5× 5

= 50 × 25

KE= 1250joules

Answer: C planets dont travel in perfect circles and they do not orbit earth they orbit the sun and they ellipse around the sun. this is the correct answer do not lsiten to the other person

Explanation:

The statement which is correct about planetary orbits is the planets travel in ellipses around the sun.

Orbits is the path of the motion, in which planets do revolutionary motion in a particular sequence.

In the solar system, sun is present at the center and all the planets do revolution around the sun in their orbits which are ellipse in their shape. Elliptical shape of the orbits is due the large distance of planets from the sun which reduces the speed due to less gravitational force of sun on that object.

Hence, option (C) is correct i.e. The planets travel in ellipses around the sun.

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Answer:

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

(b) Zinc + Silver nitrate → Zinc nitrate + Silver

(c) Aluminium + Copper chloride → Aluminium chloride + Copper

(d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chlorid

Explanation:

Answer:

0.4318 mol

Explanation:

moles = mass/molar mass

moles = 9.50/22

Answer:

Single replacement

Explanation:

Zn replaces the halogen (Cl) from HCl

It is a single replacement reaction