Nomenclature
what is the name of HI
hydroiodic acid
If normal body temperature is 98.6°F then what is this in degrees Celsius?
37.0
Calculate the percent composition by mass of magnesium in magnesium hydroxide.
41.7%
Which of the following is a nonmetal?
A.Lithium, Li, Z = 3 B. Bromine, Br, Z = 35
C. Mercury, Hg, Z = 80 D. Bismuth, Bi, Z = 83
E. Sodium, Na, Z = 11
B. Bromine, Br, Z = 35
The result of (3.8621 × 1.5630) – 5.98 is properly written as
0.06
what is the formula for copper(II) phosphate?
Cu3(PO4)2
If a patient in the hospital is running a temperature of 39.5°C, what is this in degrees Fahrenheit?
103.1
What is the empirical formula for a 100-g sample containing 87.42 g of nitrogen and 12.58 g of hydrogen? N(14.01); H(1.01)
NH2
How many neutrons are there in an atom of lead whose mass number is 208?
126
Nitrogen gas plus hydrogen gas react to produce ammonia (NH3) in a Synthesis reaction.
The coefficient for ammonia in the balanced chemical equation is
2
The compound, P4S10, is used in the manufacture of safety matches. What is its name?
tetraphosphorus decasulfide
How many micrograms are in 65.3 kg?
6.53*1010
What is the empirical formula for a sample containing 81.70% carbon and 18.29% hydrogen?
C(12.01); H(1.01)
C3H8
Ammonium carbonate is made up of?
2 NH4+ cations and 1 CO32- anion
If you have a graduated cylinder containing 15.5 mL and this volume changes to 95.2 mL after a metal with a mass of 7.95 g is dropped into the graduated cylinder, then what is the density of this metal?
9.97 × 10–2 g/mL
Sodium sulfite is used for preserving meats. What is the formula for sodium sulfite?
Na2SO3
A dose of medication was prescribed to be 35 microliters.
Which of the following expresses that volume in centiliters?
3.5 × 10–3 cL
Hydroxylammonium nitrate contains 29.17 mass %N, 4.20 mass %H, and 66.63 mass %O.
What is its empirical formula? N(14.01); H(1.01); O(16.00)
H2NO2
Calculate the molar mass of the antacid magnesium hydroxide.
Mg(24.31); O(16.00); H(1.01)
58.33 g/mol
The density of water is 1.00 g/mL at 4°C. How many water molecules are present in 6.25 mL of water at this temperature? (Avogadro’s number = 6.022 × 1023) (MM of H2O = 18.02 g/mol)
Hint: start with 6.25 mL and convert to water molecules.
2.09×1023 molecules
What is the name of C3H7OH?
propanol