The strongest substance in your body is:

After balancing the equation, what would be the coefficient for water? __NH3+__O2=__NO+H2O

A chemistry student is given 600. mL of a clear aqueous solution at 27.° C. He is told an unknown amount of a certain compound X is dissolved in the solution. The student allows the solution to cool to 27.° C. The solution remains clear.

Which of the following is an adaptation found in many desert plants? A. large, flat leaves B. dormant period during the winter C. fuzzy growth on leaves D. wide-spreading, shallow roots

In which of the following situations is the greatest amount of work accomplished? A boy lifts a 2-newton box 0.6 meters. A boy lifts a 4-newton box 0.6 meters. A boy lifts a 6-newton box 0.3 meters. A boy lifts a 9-newton box 0.3 meters.

Explain why atoms are neutral.

Read the list of elements given below. He, Ne, Ar, Kr Which of the following about the elements is true? All of them are unreactive gases. All of them are reactive metalloids. He and Ne are unreactive gases and Ar and Kr reactive metalloids.

Blank is the energy required for a chemical reaction to take place, and blank is the energy associated with every substance.

When a group 7 element reacts with a group 1 element, what is the effect on the group 1 atom

Which term best indicates the average mass of an atom of an element? atomic number mass number group number atomic mass

How many protons and electrons in Arsenic ion