True or false.

The density of a substance varies with samples of that substance

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-numbered coefficients?

How might human activities change to compensate for a decrease in water supplies? Humans might build a factory. Humans might build drainage systems. Humans might extract more water from the ground.

Is a ph = 7.00 solution acidic, basic, or neutral at 37 °c?

What is released when an excited electron returns to a lower energy state?

How many moles 1 gram H2SO4

What is the name fro H2O

A scientist has a tomato plant with red-skinned tomatoes. It has one allele for red skin (R) and one for yellow skin (r). Which describes the phenotype of the tomato plant?

Which of the following sentence best describes a buffer? A. Buffer is A substance that resists small change in the acidity of a solution when an acid or base is added to the solution. B.

Hydrogen and oxygen bond to form water. What is the chemical formula for each of these reactants? A. H and HO B. O and HO C. H and O D, HO and O

Which molecules would most likely cause a liquid to have the lowest viscosity? large, polar molecules small, nonpolar molecules small, polar molecules large, nonpolar molecules