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Chemistry: Stoichiometry and Chemical Equations

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Chemistry: Stoichiometry and Chemical Equations

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Questions and Answers

What is the formula to calculate the molecular mass of a compound?

M = sum of atomic masses (correct)

M = sum of atomic masses / 2

M = difference of atomic masses

M = product of atomic masses

What is the difference between molecular mass and formula mass?

Molecular mass is for ionic compounds, while formula mass is for covalent compounds

Molecular mass is for polyatomic compounds, while formula mass is for binary compounds

Molecular mass is for binary compounds, while formula mass is for polyatomic compounds

Molecular mass is for covalent compounds, while formula mass is for ionic compounds (correct)

How many significant figures are used to read masses from the periodic table in this course?

4 (correct)

What is the formula for tetraphosphorous trisulfide?

P4S3 Signup and view all the answers

What is the correct order to calculate the molecular mass of a compound?

Write the formula, multiply the number of atoms by the respective atomic masses, add the masses Signup and view all the answers

What is the molecular mass of H2O?

18.02 amu Signup and view all the answers

What is the formula mass of the binary compound P4S3?

220.09 amu Signup and view all the answers

What is the name of the ionic compound with the formula NaF?

Sodium fluoride Signup and view all the answers

What is the molecular mass of the covalent compound NF3?

71.01 amu Signup and view all the answers

What is the unit of the mole, a physical property?

mol Signup and view all the answers

How do you determine the formula of a binary compound?

By finding the simplest whole number ratio of atoms in the compound Signup and view all the answers

What is the difference between a formula mass and a molecular mass?

Formula mass is for ionic compounds, molecular mass is for covalent compounds Signup and view all the answers

From the given text, what can be inferred about the empirical formula of a compound?

It gives the relative number of atoms of each element present. Signup and view all the answers

What is the molecular formula for hydrogen peroxide (H2O2) based on the text?

H2O2 Signup and view all the answers

What is the mass ratio of hydrogen to oxygen in hydrogen peroxide according to the text?

1:16 Signup and view all the answers

In the context of the text, what is the provisional formula based on?

Amount of each element in moles Signup and view all the answers

How many steps are involved in finding the empirical formula of a compound?

3 Signup and view all the answers

Based on the provided information, what does the molecular formula of a compound represent?

The actual number of atoms of each element in a molecule Signup and view all the answers