One complete trip of the earth around the sun which takes one year is called a

An element has an atomic number of 22 what is the total number of valance electrons?

How much heat is required to raise the temperature of 250.0 grams of mercury 52°C? The specific heat capacity of mercury is 0.14 J/g°C.

Two substances, A and Z, are to be identified. Substance A can not be broken down by a chemical change. Substance Z can be broken down by a chemical change. What can be concluded about these substances? (1) Both substances are elements.

How do you think temperature will affect the rate of a chemical reaction?

A gas has a pressure of 532 KPa at 188L. what will its pressure be if the volume is decreased to 100L?

What is the oxidizing agent in the reaction fe + agno3 fe (no3) 3 + ag?

If the pituitary gland is inhibited, then what stops

Which mass measurement contains four significant figures? 1. 0.086 g 2. 0.431 g 3. 1003 g 4. 3870 g

A main function of a plant's seed is to

What are two metals found in the outer core