Which colorless and odorless gas, produced by radioactive decay of uranium-238, is considered to be a form of pollution?

a. boron

b. oxygen

c. radon

d. hydrogen

A family is another name for a on the periodic table of elements.

Which conditions create a thunder storm? Select three responses. low humidity high humidity warm air temperature cold air temperature high air pressure low air pressure

Which reaction is balanced correctly? C + O2 → 2CO2 CH4 + 4O2 → CO2 + 2H2O C3H8 + 5O2 → 3CO2 + 4H2O C6H12O6 + 3O2 → 6CO2 + 6H2O

A sample of iron absorbs 67.5 j of heat upon which the temperature of the sample increases from 21.5 °c to 28.5 °c. if the specific heat of iron is 0.450 j/g-k, what is the mass (in grams) of the sample?

Calculate the pressure using the formula P = 1.03 + Mass on Syringe / area of Top of Syringe Pressure: kg/cm2

Lead oxide is formed when a lead cation that has a charge of 2 + combines with an oxygen anion that has a charge of 2-. Using the crisscross method, write the formula for lead oxide.

Why is it important to reduce coefficients in a balanced equation to the lowest possible whole-number ratio?

Which agent causes sand dunes to form? Ocean waves Gravity The wind carries the sand until it runs into an obstacle Weathering of old rocks in the desert

What does composition mean in science

Which of the following descriptions best describes a solid substance? A. The volume of the substance depends on the container it is in. B. Volume of the substance changes depending on its location. C. The shape of the substance changes often. D.