In an atom of argon-40, the number of protons

a. equals the number of electrons

b. equals the number of neutrons

c. is less than the number of electrons

d. is greater than the number of electr

How can you tell if a chemical change has occurred?

Ammonia is created in the Haber process in a rigid container (nitrogen gas plus hydrogen gas react to form ammonia gas). 10 moles of hydrogen gas are mixed with 5 moles of nitrogen gas. The initial pressure exerted on the container is 10 atm.

Does anyone know how sand is made?

All of the following are abiotic factors in an ecosystem except: Algae pH Salinity Climate

Calculate the mass of 1.000 mole of CaCl2

Marcus measured the masses and volumes of samples of four different substances, and he calculated their densities. The table shows Marcus's measured and calculated values. Substance Mass (g) Volume (cm3) Density (g/cm3) aluminum 5.7 2.1 2.

5. Rocks and sediment change their form as they move through the rock cycle. Which change involves melting? O lava to rock O magma to lava O rock to magma rock to sediment Submit .

Glucose is a simple sugar made up of a carbon, hydrogen, and oxygen. What kind of molecule is glucose?

Imagine that you have a 7.00 LL gas tank and a 3.50 LL gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.

Which profession is likely to use a radiation shield