Inorganic Chemistry Answers

What describes the emissions of an isotope that gives off both beta and gamma radiation?

1. a mixture of positive and negatively charged particles
2. negatively charged particles and high energy photons
3. no particles emitted, only high energy photons of light
4. neutral particles and high energy photons of light

which of the option ?

What does adding a catalyst to a reaction do? Select all that apply.

1. alter the orientation of reactants in the reaction
2. lower the activation energy of the reaction
3. increase the rate of the reaction
4. increase the amount of each product formed by the reaction

What happens when there is an increase in temperature for a reaction rate? Select all that apply.

1. It increases the chance that the reaction will be endothermic
2. It increases the activation energy of a reaction
3. It increases the total number of molecular collisions that occur
4. It increases the percentage of collisions that result in a reaction

the last option is correct, but there are two options to choose so what would the other one be ?

Study the reaction. H2SO4(l) + CaCO3(s) ⇌ CO2(g) + H2O(l) + CaSO4(aq) Which of the following would cause the equilibrium to shift, producing more carbon dioxide gas? Select all that apply.

1. removing carbon dioxide gas from the system
2. adding CaCO3 to the system
3. removing water from the system
4. removing H2SO4 from the system

Why do water molecules tend to stick to each other to form a liquid?

1. The hydrogen atoms form negative ions that can make ionic bonds with oxygen.
2. The exposed charge on hydrogen's protons are attracted to unshared electron pairs on oxygen atoms. 
3. Water molecules can share electrons with neighboring molecules forming strong covalent bonds.

which of the option ?

Americium-241 is a radioactive isotope used in household smoke detectors. It decays by alpha decay. Which of the following describes the properties of this radiation? Select all that apply.

1. unlikely to escape the smoke detector
2. made of 4 particles joined together
3. positively charged
4. high energy photons of light

A Mixture Contains 1.5 Liters Oxalic Acid H2C2O4· 2H2O (ρ=1.653 g/mL) and 2-

gallon Water. Determine:

ρ Oxalic acid = 1.653 g/mL

ρ water = 1000 g/L

a) %w/w, %w/v, %v/v of oxalic acid in a solution (6 pts)

b) ppm and ppb of oxalic acid (4 pts)

c) Molarity, Normality, and molality of the solution (10 pts)

36 grams of aspirin is burnt with a flame in presence of excess oxygen until nothing remains. The byproduct gases are collected and it is found that there are 79.2 g of pure CO2 as one of the products. How many carbon atoms are there in each formula unit of Aspirin (MW = 180g)?

Everyone knows that helium makes your voice high pitched, but there is another gas with the opposite effect. It is composed of the elements Sulfur and Fluorine, with the molecular formula SF6. Let’s assume that we perform a reaction in the lab at constant temperature and pressure and that both Sulfur (assume sulfur is monatomic in this state) and Fluorine are in gaseous form. What ratio of elements would give us only product without excess starting material?

Thinking back to our Sulfur Hexafluoride reaction, how big of a vessel would we require to store only the product in liters if we start with 2 moles of Fluorine (with just enough Sulfur to completely convert all Fluorine to the product) at standard temperatures and pressure? Assume that Sulfur Hexafluoride is an ideal gas.