Which of the following factors would explain why 50 grams of iron powder reacts faster than a 50 gram solid block of iron?

a. Temperature

b. Concentration of Reactants

c. Particle Size

d. Agitation

e. Catalysts

f. Nature of reactants

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g/cm3. (1cm3 = 1ml) select one: a. 18.5 ml b. 23.6 ml c. 42.4ml d. 31.2 ml

What electron has the electron configuration 1s22s22p63s23p2?

A boy inflated a bunch of balloons while he was outside with an ambient temperature of 26oC. He then took the balloons inside his air-conditioned house where the temperature was 20oC. What do you think happened to the balloons?

The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have?

Physical Science Gas Laws Test Boyles Law: P1/V1 = P2/V2 1atm = Standard Pressure Charles Law: V1/T1 = V2/T2 Degrees Celcius + 273 = Kelvin Combined gas Law: (P1) (V1) = (P2) (V2) (T1) (T2) Answer the following problems using the correct formula.

Which component is an example of scientific law? A. All objects attract other. B. Radium is a radioactive element. C. What goes up always comes back down. D. Gravity is a dent in the fabric of space and time.

At 40°C, how much KNO3 is soluble?

If you started with 1000 units of a radioactive element that has a half-life of 2,500 years, how many half-lives will the material have gone through in 7500 years? (Show work and explain answer).

Consider the reaction BF3 + NH3 → F3B-NH3 What changes in hybridization (if any) of the B atom are a result of this reaction? A. Before the reaction boron is sp2 hybridized, and after the reaction it is sp3d hybridized. B.

In the reaction CaCO3 → CaO + CO2 100 grams of calcium carbonate (CaCO3) is observed to decompose upon heating into 56 grams of calcium oxide (CaO) and 44 grams of carbon dioxide (CO2). This is an illustration of