Chemical Formulas and John Dalton's Laws Quiz

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What did John Dalton propose in the early nineteenth century?

Atoms of a given element have different masses and chemical properties.

Atoms don't have defined mass or chemical properties.

Atoms of different elements are identical in mass and chemical properties.

Atoms of a given element are identical in mass and chemical properties. (correct)

Which particle has a positive electrical charge and a mass similar to that of a Hydrogen atom?

Isotope

Electron

Proton (correct)

Neutron

What is the smallest particle of an element?

Molecule

Neutron

Atom (correct)

Proton

What is the atomic number defined as?

Number of protons in the nucleus Signup and view all the answers

What are isotopes?

Atoms with the same atomic number but different mass numbers Signup and view all the answers

What holds the constituent atoms together in polyatomic molecules?

Chemical bonds Signup and view all the answers

Which type of substances do not consist of ions and do not conduct electricity?

Nonelectrolytes Signup and view all the answers

How are formulas of substances written to denote the number of atoms of an element in the substance?

With numerical subscripts after each symbol Signup and view all the answers

What is the charge on the ammonium ion (NH4+)?

+1 Signup and view all the answers

In the compound CaO, what does 'O' stand for?

Oxygen Signup and view all the answers

What does molarity (M) measure in a solution?

Number of moles of solute in 1 liter of solution Signup and view all the answers

How is normality (N) defined in a solution?

Number of equivalents of solute in 1 L of solution Signup and view all the answers

What does weight percent express in terms of concentration?

% weight of solute per 100 g of solution Signup and view all the answers

In a 5% (v/v) aqueous solution, what does 'v/v' represent?

% volume to volume ratio Signup and view all the answers

What does 'ppm' stand for in expressing concentration?

% parts per million Signup and view all the answers

'Parts per million' is equivalent to how many mg/L for dilute aqueous solutions with a density of approximately 1.00 g/mL?

$0.01 mg/L$ Signup and view all the answers

Chemical Formulas and John Dalton's Laws Quiz

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Questions and Answers

What did John Dalton propose in the early nineteenth century?

Which particle has a positive electrical charge and a mass similar to that of a Hydrogen atom?

What is the smallest particle of an element?

What is the atomic number defined as?

What are isotopes?

What holds the constituent atoms together in polyatomic molecules?

Which type of substances do not consist of ions and do not conduct electricity?

How are formulas of substances written to denote the number of atoms of an element in the substance?

What is the charge on the ammonium ion (NH4+)?

In the compound CaO, what does 'O' stand for?

What does molarity (M) measure in a solution?

How is normality (N) defined in a solution?

What does weight percent express in terms of concentration?

In a 5% (v/v) aqueous solution, what does 'v/v' represent?

What does 'ppm' stand for in expressing concentration?

'Parts per million' is equivalent to how many mg/L for dilute aqueous solutions with a density of approximately 1.00 g/mL?

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