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How many moles of Ca(NO) are there in a sample with a mass of 50.0 g?
a. 0.305 mol
b. 0.333 mol
c.
0.490 mol
d. 8200 mol

The statement is true because  asphalt in the la brea tar pits  can not be burnt to produce energy henece they are not fossil fuels.

Fossil fuels are those hydrocarbons that are burnt to liberate energy. They include; crude oil, natural gas, coal, etc,

The statement is true because  asphalt in the la brea tar pits  can not be burnt to produce energy henece they are not fossil fuels.

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Answer:

False

Explanation:

The answer is false I just took the test , the other answer is incorrect.

The molar mass of methylammonium bromide is 111u.

The molar mass is defined as the mass per unit amount of substance of a given chemical entity.

Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.

Add it all together and put units of grams/mole after the number.

Atomic weight of H is 1u

Atomic weight of N is  14u

Atomic weight of C is  12u

Atomic weight of Br is  79u

Calculating molar mass of  [tex]2H_3NCH_3Br[/tex] =2(1 x3+ 14+12+ 1 x 3 +79) = 111u

Hence, the molar mass of methylammonium bromide is 111u.

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Answer:

.59 g

Explanation:

5.6 d / 3.9 d /half life = 1.436 half lives

(1/2)^1.436 = .3696 of original left

.3696 * 1.6 = .59 gm

[tex]\huge\bf\maltese{\underline{\red{J0|N}}}\maltese[/tex]

Answer:

answer is 60

Explanation:

Answer:

Water is one of the most precious resources the earth provides to mankind. Its use in modern age is manifold. We drink water to satisfy our thirst. We use it for domestic needs, irrigation, industrial use, transportation, power production and waste disposal. Water is universal solvent.

Thanks to our nature; it is very rich in water. About three-fourth of the earth's surface is covered with water. But only a small portion of total water resources is actually available for human use. Majority, about 97.3% is present in oceans and is salty in nature.

The fresh water constitutes only 2.7%. Out of this, inland" surface waters i.e. lakes, rivers, and ponds account for hardly 0.02%. This relatively negligible portion of the earth's water is crucially important to all form of terrestrial and freshwater aquatic life. We get water mainly from three sources;

1 Rain water.

2 Surface water

3 Ground water

The number of molecules of hydrogen will be required to produce 1.60 mol of water are 9.6×10²³.

Stoichiometry of the reaction gives idea about the relative amount of moles of reactants and products present in the given chemical reaction.

Given chemical reaction is:

2H₂ + O₂ → 2H₂O

From the stoichiometry of the reaction,

2 moles of hydrogen = produces 2 mole of water

1.6 moles of hydrogen = produces 1.6 mole of water

As we know that in 1 mole of any substance 6.022×10²³ entities of that substance are present.

In 1.6 mole of H₂ gas = (1.6)(6.022×10²³) = 9.6×10²³ molecules of hydrogens are present.

Hence 9.6×10²³ molecules of hydrogens are present.

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Answer:

using electric cars , Transitioning to energy sources that do not emit greenhouse gases, such as solar, wind, biofuels, and nuclear ☢️

Explanation:

Answer:

See below

Explanation:

1)

.897 J / g-C  *  100 gm  * 120 C  = 10764 J    (see how the 'units' cancel out?)

2)  spec heat =   963.6 J / (120 gm (90-80 C) =

                              963.6 / ( 120 * 10) = .803  J / g-C

              from the table,  this is granite

Answer: c, and my yt is ChezBeed

Explanation:

The balloon will burst if the volume of the balloon is less than 1.68 L since 8 g of sodium bicarbonate produces 1.68 L of carbon dioxide gas.

The volume of carbon dioxide produced is obtained from the equation below:

[tex]CH_3COOH + NaCO_3 \rightarrow CH_3COONa + H_2O + CO_2 \\ [/tex]

1 mole of sodium bicarbonate reacts with one mole of acetic acid in vinegar to produce 1 mole of carbon dioxide.

The volume of 1 mole of carbon dioxide is 22.4 L

Moles of sodium bicarbonate in 8 g = mass/molar mass

molar mass of sodium bicarbonate = 106 g

moles of sodium bicarbonate = 8/106 = 0.075 moles

Moles of carbon dioxide produced = 0.075 moles

Volume of carbon dioxide = 0.075 × 22.4 = 1.68 L

Therefore, the balloon will burst if the volume of the balloon is less than 1.68 L.

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Answer:

it's A

Explanation:

The given element is, fluorine is a non-metal with symbol (F). It is a gas and belongs to the group 17 and period 2.

The atomic number of fluorine = 9

The number of electrons = 9

Answer:

its the first one... sorry for the wait was doing my homework :)

The value of Avogadro's number is:

[tex]N = 6.02214076*10^{23}[/tex]

So the correct option is the second one.

Avogadro's number represents the number of molecules in a mole.

The value of the Avogadro's number is such that the mass of one mole of a compound is numerically equal to the mass of that compound in daltons.

And, by definition, Avogadro's number is:

[tex]N = 6.02214076*10^{23}[/tex]

With this in mind, we conclude that the correct option is the second one.

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Answer:

Explanation:

6.02x10^23

The sample which has the largest volume is 5 grams of aluminum.

Density is the mass of per unit volume.

Given, density of aluminum is 2.7 g.cm

The density of copper is 9. 0 g.cm

Step1: Calculate the volume

a. volume of copper of 1.0 gram

[tex]\dfrac{mass}{density} = \dfrac{1}{9} = 0.112[/tex]

Volume of copper of 5.0 gram

[tex]\dfrac{mass}{density} = \dfrac{5}{9} = 0.55[/tex]

b. aluminum of 1 gram

[tex]\dfrac{1}{2.7} = 0.370[/tex]

Aluminum of 5 gram

[tex]\dfrac{5}{2.7} = 1.851[/tex]

Thus, 5 gram of aluminum has the largest volume.

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Answer:

c.) riding your bike

Explanation:

Playing chess doesn't require any physical challenges, just mental

While watching basketball, you don't physiclly move

Riding a bike requires physical movement and acceliration

Therefore  C is the correct answer

Answer:

1 Nitrate

2 sulphate

3 ammonium

4 carbonate

5 permanganate

6 phosphate

7 acetate

8 chromate

9 dichromate

10 sulphite

Answer:

Double helix

Explanation:

Its like two starcaises intertwined.

Answer:

D

Explanation:

D is the answer had to find out the harder way

The volume of a sample of a gas at 0°c is 100 liters, if the volume of the gas is increased to 200 L at constant pressure, then new temperature is 546K.

Relation between the volume and temperature of any gas will be explained by using the ideal gas equation:

PV = nRT

Means volume and temperature is directly proportional to each other & for this question equation becomes:
V₁/T₁ = V₂/T₂, where

On putting all these values on the above equation, we get

T₂ = (200)(273) / (100) = 546 K

Hence resultant temperature of the gas is 546 K.

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Answer:

Sublimation

Explanation:

Answer:

[tex]\boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}[/tex]

Explanation:

Given:

Mass of ferous (Fe) produced = 750 gram.

To find:

Mass of water produced= ?

Solution:

Molar mass of Fe is 55.84 gram/mol

Let's find out the number of moles of ferous produced.

[tex] \small \sf Number \: of \: moles = \frac{Given \: mass \: of \: substance }{Molar \: mass \: of \: substance} [/tex]

Substituting the given data in above formula.

[tex] \small \sf Number \: of \: moles = \frac{750}{55.84} [/tex]

[tex] \boxed{\small \sf Number \: of \: moles \: of \: Fe= 13.43 \: moles}[/tex]

Now the given reaction is,

[tex]Fe_3O_4 + 4H_2 \rightarrow 3Fe + 4H_2O[/tex]

now calculate the number of moles of H2O

[tex] \sf \: \frac{3}{4} = \frac{13.43}{x} \\ \sf x = \frac{13.43 \times 4}{3} \\ \sf x = 17.90 \: moles[/tex]

[tex] \small \boxed{\sf number \: of \: moles \: of \: H_2O= 17.90 \: moles}[/tex]

mass of one mole of H2O is 18 gram, so we can calculate mass of 17.90 moles.

[tex]\small \sf \: Mass \: of \: H_2O = 17.90 \times 18 \\ \boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}[/tex]

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Answer:

Explanation:

in set up A the fresh soil contains carbon (iv) oxide which reacts with lime water to form an insoluble white precipitate of calcium carbonate. In set up B carbon (iv) oxide is not present in the soil since it has been boiled the gas has been expelled. Therefore there is no observable change in B

The rate of the reaction is the speed at which the reactants are used to produce the products. An increase in temperature and concentration of the reactant increases the rate of reaction.

The rate of the reaction is the speed at which the products are used to produce products. The rate increases when the concentration of the reactants in a reaction is increased. Also, the smaller grounded pieces of reactants increase the reaction rate as the surface area gets increases.

The rise in temperature and the addition of the catalyst also increases the rate of reaction as temperature and the catalysts increase the chemical reaction by increasing the speed.

When an inhibitor is added to a reaction then the rate of the reaction decreases as they inhibit the formation of the products and block the reaction pathways.

Therefore, the inhibitors decrease the rate of the reaction.

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Answer:

The process or effect of simplifying a single chemical entity into two or more fragments.

Explanation:

Chemical decomposition, or chemical breakdown, is the process or effect of simplifying a single chemical entity into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis.

Answer:

What are some examples of decomposition reactions?

Production of calcium oxide or quicklime.

Production of lithium oxide.

Preparation of oxygen and carbon dioxide.

In metallurgy, for the extraction of metals from their oxides and chlorides through electrolytic decomposition.

The required mass of argon in given number of atoms of argon is 155.61 grams.

Avogadro's number is the number of atoms which are present in 1 mole of any substance and it is equal to 6.022×10²³.

Relation between the mass and moles of any substance will be represented as:

So, moles of argon will be calculated by using given number of atoms as:

Moles = 2.4×10²⁴ atoms / 6.022×10²³ atoms per mole

Moles = 3.9 moles

Now mass will be:

W = (3.9mol)(39.9g/mol) = 155.61 g

Hence required mass of argon is 155.6g.

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This can be solved according to Le C ha.tellors principle

So

Here to increase NO_2

We need to increase the temperature or increase the concentrations of reactants

The addition of N₂O₄(g) to the system would result in an increase of nitrogen dioxide, NO₂.

The balanced equation provided shows the equilibrium between nitrogen dioxide (NO₂) and dinitrogen tetroxide (N₂O₄). According to Le Chatelier's principle, a change in conditions will cause the system to shift in a way that opposes the change. In this case, if N₂O₄ is added to the system, the equilibrium will shift to the right to consume the added N₂O₄ and produce more NO₂.

Based on the given information, the enthalpy change (AH°) for the reaction is 58 kJ. This indicates that the forward reaction (from N₂O₄ to 2NO₂) is endothermic, meaning it requires heat to proceed. Adding N₂O₄ to the system will provide more reactant molecules, increasing the concentration of N₂O₄ and causing the equilibrium to shift towards the products (more NO₂) to minimize the effect of the added N₂O₄.

Therefore, the addition of N₂O₄ to the system will result in an increase in nitrogen dioxide, NO₂, as the equilibrium shifts to the right to restore equilibrium.

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By applying Boyle's law, the new volume of this ideal gas is equal to 551.58 cm³.

Given the following data:

In order to determine the new volume of this ideal gas, we would apply Boyle's law.

Mathematically, Boyle's law is given by this formula:

PV = k

P₁V₁ = P₂V₂

Where:

Making V₂ the subject of formula, we have:

V₂ = (P₁V₁)/P₂

Substituting the given parameters into the formula, we have;

V₂ = (110.0 × 524)/104.5

V₂ = 57,640/104.5

V₂ = 551.58 cm³

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Answer:

equation

Explanation:

Answer:

Bromine (Br)

Explanation:

Im assuming thats the answer you are looking for since you didnt include any options :,)

Answer:

granulated sugar

Explanation:

the rate of dissolving can be increased by mixing stirring and agitating the

solution. hope this answers your question

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

"Mayans cooking method includes digging a shallow pit, lining it with stones or clay balls.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya, with different types of fruit. Corn was made into a kind of porridge, called atole in Mesoamerica and capita in Inca territory.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

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