Chemistry

Iron, Fe, is an Alkaline Earth metal. True or false?

False

Potassium, K, is an Alkaline Earth metal. True or false?

False

The words "rigid shape" describe a gas. True or false

False

Tin, Sn, is an Alkaline Earth metal. True or false?

False

Atoms consist principally of what three fundamental particles?

Neutrons, electrons, and protons

SO2 condenses to a colorless liquid at 14°F and atmospheric pressure. Chemical or physical property?

Physical property

What is the correct classification for NH4+?

Polyatomic cation

Calculate the number of moles of oxygen atoms in 32.0 grams of oxygen gas (O2).

1 mol

How many significant figures does 0.04309

4 sig figs

Liquid nitrogen is used by physicians to burn moles off of skin. Liquid nitrogen boils at boils at 77 K. What is its boiling point in °C ?

-196

A cube of lead has a volume of 6.61 cm3. Its mass is 75.0 grams. What is its density?

11.3 grams/cm^3

At 25°C, one cm3 of iron has a mass of 7.62 grams. What volume of iron is occupied by 125 grams of iron?

16.4 cm^3

How many significant figures should there be in the answer to the following math equation? 23.413 g(2.15 cm x 1.1 cm x 3.73 cm)

2 sig figs

How many significant figures should there be in the answer to the following math equation? 2.834 + 5.71520 + 2.12 + 178.1 + 250.2619

3 sig figs

What mass of iron is contained in 86.6 grams of FeSO4?

31.8 g Fe

Balancing a chemical equation so that it obeys the law of conservation of matter requires:

Adjusting the coefficients in front of the formulas so there are the same number and type of atom on both sides of the equation.

Glucose has a molecular weight of 180.2 g and an empirical formula CH2O. What is its molecular formula?

C6H12O6

Mercury(II) sulfide forms when it is exposed to sulfide ions. Chemical or physical property?

Chemical Property

Magnesium, Mg, is an Alkaline Earth metal. True or false?

True