How many protons and electrons are present in O2-?
What is 8 protons and 10 electrons?
100
What is the correct order of the electromagnetic spectrum from shortest wavelength to longest?
What is Gamma Rays→X-rays→Ultraviolet Radiation→Visible Light→Infrared Radiation→Microwaves→Radio Waves.
100
What is the volume of 28.0 g of nitrogen gas at STP?
What is 22.4 L
100
Name CO
What is carbon monoxide?
200
The pressure of the earth's atmosphere at sea level is 14.7 lb/in2. What is the pressure when expressed in g/m2? (2.54 cm = 1 in., 2.205 lb = 1 kg, 1000 g = 1 kg)
What is 1.03 × 107 g/m2
200
Chlorine has two stable isotopes, Cl-35 and Cl-37. If their exact masses are 34.9689 amu and 36.9695 amu, respectively, what is the natural abundance of Cl-37? (The atomic mass of chlorine is 35.45 amu)
What is 24.05%
200
A compound containing phosphorus and oxygen has a molar mass of 219.9 g/mol and an empirical formula of P2O3. Determine its molecular formula.
What is P4O6?
200
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25°C?
What is 36.7 atm
200
Write copper (I) chloride
What is CuCl?
300
A room has dimensions of 10.0 ft × 20.0 ft × 8.00 ft. Given that there are three feet in a yard, what is the volume of the room in yd3?
What is 59.3?
300
What is the oxygen-to-sulfur mass ratio of sulfur dioxide?
What is 1.0?
300
The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0 g. What is the percent yield?
What is 56.0?
300
What is the molecular geometry of NH4+?
What is tetrahedral?
300
Name NiF2
What is nickel (II) fluoride?
400
An energy diagram that shows the reactants having greater energy than the products illustrates an...
What is exothermic reaction?
400
A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio. The name of the compound described here is?
What is sodium oxide
400
An unknown acid has a molar mass of 60.05 g/mol. Given the following percent composition, what is the molecular formula? 40% C, 6.7% H, 53.3% O.
What is C2H4O2?
400
What is the electron configuration for P?
What is [Ne]3s23p3?
400
Write sulfur hexafluoride
What is SF6?
500
How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to 50.0°C?
Q = m c ΔT; cwater = 4.184 J / g.OC
What is 10.5?
500
How many aluminum atoms are in aluminum can with a mass of 16.2 g.
What is 3.62 x 10^23
500
What mass of nitrogen must be reacted inorder to absorb 246 kJ of energy according to the following reaction : N2 (g) + O2 (g) → 2NO (g) ; △H0 rxn = +182.6 kJ
What is 37.7 g
500
A 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32°C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three significant figures in °C)?