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3 years ago

How many atoms are in a molecule of RSq?

Chemistry

1 answer:

Wewaii [24]3 years ago

6 0

2 atoms in a molecule of RSq, TSq contains 3 different types of atoms (Sq, R, and T.)

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The reaction of hydrogen(g) with fluorine(g) to form hydrogen fluoride(g) proceeds as follows: H2(g) + F2(g) 2 HF(g) When 0.647

Nata [24]

Answer: The value of $\Delta H$ for the reaction will be -537 kJ

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of hydrogen gas = 0.647 g

Molar mass of hydrogen gas = 2 g/mol

Putting values in above equation, we get:

$\text{Moles of hydrogen gas}=\frac{0.647g}{2g/mol}=0.324mol$

We are given:

Energy released for 0.324 moles of hydrogen reacted is 174 kJ

For the given chemical reaction:

$H_2(g)+F_2(g)\rightarrow 2HF(g)$

By Stoichiometry of the reaction:

When 0.324 moles of hydrogen gas is reacted, the energy evolved is 174 kJ

So, when 1 mole of hydrogen gas will react, the energy evolved will be = $\frac{174kJ}{0.324mol}\times 1mol=537kJ$

Sign convention of heat:

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

Hence, the value of $\Delta H$ for the reaction will be -537 kJ

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3 years ago

What kind of charge does a neutron have?

Nat2105 [25]

Neutrons actually don't carry an electrical charge, which is why they are called neutrons because they are "Neutral".

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Kelly has some sand in a bucket, but she thinks that there may be some salt mixed in with her sand. How can she determine if the

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What is an atomic nucleus?

Blababa [14]

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The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom

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3 years ago

Is NaHCO3 a compound? Explain pls!

Slav-nsk [51]

Answer:

Yes it is

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2 years ago

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