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