GenChem1

1. What is the formula for percent mass composition?

• A

• B

• C

• D

Which chemical formula is composed of 119g/mol of molecular mass?

• CH₄

• H₂O

• NaCl

• MnO₄

What is the primary use of isotope Yttrium – 90?

• cutting tools

• superconductors

• jet engine coatings

• to treat cancer and shrink tumors

It is known to be the most abundant isotope of Hydrogen.

• H

• ₁¹H

• ₁²H

• ₁³H

A sample of copper weighing 6.93 g contains how many moles of copper atoms?

• 0.109 mol

• 1.09 mol

• 10.9 mol

• 109 mol

Which of the following is a polyatomic anion?

• Bromide

• Iodide

• Nitrite

• Sulfide

Which of the following is a binary compound?

• BaCrO₄

• HNO₂

• HNO₃

• MgCl₂

How many chlorine atoms are there in dinitrogen tetrachloride?

• 1

• 2

• 3

• 4

What is the correct charge of sulfate?

• 1-

• 2-

• 3-

• 4-

What is the charge of a cation?

• negative

• neutral

• positive

• unknown