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3 years ago

Find the molar mass and the mass of 5.0000 mol of each of the following compounds. a. calcium acetate, Ca(C2H3O2)2

Chemistry

1 answer:

Vadim26 [7]3 years ago

8 0

Answer:

molar mass is 158g and the mass of 5moles is 790g

Explanation:

this is becasuse i added the atomic mass of each of the elements in the compound and also taking note of their subscript.the i multiply the molarmass by 5 for 5moles of the compound

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5K + KNO3 ------ 3K2O + N

masya89 [10]

Answer:

174,957.143 grams of potassium and 89,228.478 grams of potassium nitrate will be needed.

Explanation:

$5K +KNO_3\rightarrow 3K_2O + N$

Mass of nitrogen = 27 lbs = 12,247 g

1 lbs = 453.592 g

Moles of nitrogen = $\frac{12,247 g}{14 g/mol}=874.786 mol$

According to reaction, 1 mole of nitrogen is produced from 5 moles of potassium and 1 mole of potassium nitrate.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{5}{1}\times 874.786 mol=4,373.928 mol$ of potassium.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{1}{1}\times 874.786 mol=874.789 mol$ of potassium nitrate.

Mass of 4,373.928 moles of potassium:

$4,373.928 mol\times 40 g/mol=174,957.143 g$ of potassium

Mass of 874.789 moles of potassium nitrate:

$874.789 mol\times 102 g/mol=89,228.478 g$ of potassium nitrate

3 0

3 years ago

Solid magnesium carbonate (mgco3) and solid sodium nitrate were mixed, placed in water, and stirred. what is observed? 1. mgco3

Komok [63]

MgCO3 will remain undissolved and
NaNO3 will dissolve

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3 years ago

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A gardener cut her finger while pruning shrubs. She noticed that after two weeks the wounds had nearly healed with just a small

kkurt [141]

Answer:

Explanation:

7 0

3 years ago

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For each pair of molecules given in the table below, identify the correct relationship.

Oduvanchick [21]

For each pair of molecules given in the table below, the correct relationships are identified as follows.

<h3>The relationships between the molecules are given as?</h3>

These are structural isomers. This is because, they have the same molecular formula (C₆H₁₂) but possess varying structures.
The given pair of molecules posses similar formula (C₄H₁₀O) and can be superimposed on one another via rotation of the entire molecule, hence they are identical isomers.
In this case the pair of molecules possess similar molecular formula (C₄H₁₀O) and similar arrangement of atoms. Hence, they are identical isomers.
This case also features structural isomers. They both contain the same carbon chain with similar formula - C₃H₆BrCl
These pair as identical isomers. They are also derived from C₃H₆BrCl.
This pair are called stereoisomers isomers. This is because they contain the same about of molecules but are different in the position of the alcohol (-OH) group. But more importantly, the position of the bonding is the same.
This set is a functional pair. This is because the composition of the molecules present in each case are different.
This is also a functional pair.

<h3>What is a molecules?</h3>

A molecule is a bonded collection of atoms that represents the smallest fundamental unit of a chemical compound that may participate in a chemical process.

Learn more about a molecule at:
brainly.com/question/473667
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6 0

2 years ago

The catalytic decomposition of hydrogen peroxide yields oxygen gas and water, according to the reaction given below. In an exper

elixir [45]

Answer:

The molar concentration of hydrogen peroxide is 0.01164 M

Explanation:

<u>Step 1: </u>Data given

Volume of gas yielded = 75.3 mL = 0.0753 L

Temperature = 25.0 °C

Atmosphere = 0.976 atm

(Water = 0.032 atm at 25°C)

The original volume of H2O2 is 500 mL

Molar mass of O2 =32 g/mol

<u>Step 2:</u> The balanced equation

2H2O2(aq) → 2 H2O(l) + O2(g)

<u>Step 3:</u> Calculate pressure of O2

P = P(02) + P(water)

P(O2) = P - P(water)

P(O2) = 0.976 atm - 0.032 atm

P(O2) = 0.944 atm

<u>Step 4:</u> Calculate moles O2

p*V=n*R*T

⇒ with p = the pressure of O2 gas = 0.944 atm

⇒ with V= the volume of O2 = 0.0753 L

⇒ with n = the number of moles of O2

⇒ with R = the gas constant = 0.08206 L*atm/K*mol

⇒ with T = the temperature = 25°C = 298 Kelvin

n = (p*V)/(R*T)

n = (0.944 * 0.0753)/(0.08206*298K)

n = 0.00291 moles O2

<u>Step 5:</u> Calculate moles of H2O2

For 1 mole of O2 produced, we need 2 moles of H2O2

For 0.00291 moles O2 we need 2*0.00291 = 0.00582 moles H2O2

<u>Step 6:</u> Calculate molar concentration of H2O2

Molar concentration = moles / volume

Molar concentration = 0.00582 moles / 0.500L

Molar concentration = 0.01164 M

The molar concentration of hydrogen peroxide is 0.01164 M

3 0

3 years ago