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3 years ago

7

The chemical equation below shows the amount of the reactants used and the amount of only one of the products formed. How much w

ater (H2O) should be formed in this chemical reaction? CH4 mass 4 + 2O2 mass 16 CO2 11 + 2h2O mass ?

1 answer:

Karolina [17]3 years ago

6 0

Answer:

CH4 + 2O2 → CO2 + 2H2O

Explanation:

This is all i could come up with im sorry.

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Calculate the molar mass of a gaseous substance if 0.125 g of the gas occupies 93.3 mL at STP.

just olya [345]

Answer:

30.0g/mol

Explanation:

Step 1: Given data

Mass of the gas: 0.125 g

Pressure (P): 1 atm (standard pressure)

Temperature (T): 273.15 K (standard temperature)

Volume (V): 93.3 mL

Step 2: Calculate the moles of the gas

We will use the ideal gas equation.

$P \times V = n \times R \times T\\n = \frac{P \times V}{R \times T} = \frac{1atm \times 0.0933L}{\frac{0.0821atm.L}{mol.K} \times 273.15K} = 4.16 \times 10^{-3} mol$

Step 3: Calculate the molar mass of the gas

4.16 × 10⁻³ moles correspond to a mass of 0.125 g. The molar mass of the gas is:

$\frac{0.125g}{4.16 \times 10^{-3} mol} =30.0g/mol$

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3 years ago

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Vaselesa [24]

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3 years ago

An astronomer is a guest speaker at your school. She states that iron is the very last product in stellar fusion. Why would she

Zarrin [17]

Iron is the very last product in stellar fusion is that; Iron has a tightly bound nucleus, and atoms larger than iron are less stable and tend to undergo nuclear fission.

The stability of an atom is dependent on the binding energy per nucleon of the atom.

The binding energy per nucleon of elements increases steadily until iron, we can see that from the curve very easily.

Beyond iron, we have exceeded the region of stable binding energy per nucleon of atoms. The atoms after iron in the curve are mostly unstable heavy nuclei.

Learn more: brainly.com/question/10095561

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2 years ago

A student wants to prepare 1.00 L of a 1.00 M solution of NaOH (molar mass 40.00 g/mol). If solid NaOH is available, how would t

Serga [27]

Explanation:

1)

$Molarity=\frac{\text{Mass of substance}}{\text{Molar mass of substance}\times \text{Volume of solution(L)}}$

Mass of NaOH = m

MOlar mass of NaOH = 40 g/mol

Volume of NaOH solution = 1.00 L

Molarity of the solution= 1.00 M

$1.00 M=\frac{m}{40 g/mol\times 1.00 L}$

$m=1.00 M\times 40 g/mol\times 1.00 L = 40. g$

A student can prepare the solution by dissolving the 40. grams of NaOH in is small volume of water and making that whole volume of solution to volume of 1 L.

Upto two significant figures mass should be determined.

2)

$M_1V_1=M_2V_2$ (dilution equation)

Molarity of the NaOH solution = $M_1=2.00 M$

Volume of the solution = $V_1=?$

Molarity of the NaOH solution after dilution = $M_2=1.00 M$

Volume of NaOH solution after dilution= $V_2=1 L$

$M_1V_1=M_2V_2$

$V_1=\frac{1.00 M\times 1.00 L}{2.00 M}=0.500 L$

A student can prepare NaOH solution of 1.00 M by diluting the 0.500 L of 2.00 M solution of NaOH with water to 1.00 L volume.

Upto three significant figures volume should be determined.

8 0

3 years ago

What does homogeneous and herogeneous mean?

serious [3.7K]

Homogeneous:

denoting a process involving substances in the same phase (solid, liquid, or gaseous).

Herogeneous:

of or denoting a process involving substances in different phases (solid, liquid, or gaseous).

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3 years ago