How many electrons are located in the valence energy level of elements of Group 15?

a-2

b-3

c-4

d-5

A car traveling at 32 m/s starts to decelerate steadily. It comes to a complete stop in 6 seconds. What is its acceleration? answer units

3. C6H6 + O2 combustion

Which is a chemical bond? A. The force that holds together the elements in a compound? B. A substance that's composed of atoms? C. A representation of chemical properties? D. The attraction of two atoms that hold the atoms together?

The molecular mass of the compound is 132 amu. What is the molecular formula?

Greenhouse gases make up what percentage of Earth's atmosphere? A. less than 1% B. between 1% and 5% C. between 5% and 20% D. over 20%

A data table shows the heght of a person on his birthday each year ten years what is the independent varible

Convert 0.185mol sucrose (C12H22O11) into grams.

Is there a difference between the freezing temperature and the melting temperature? Explain your answer in terms of numerical values, physical change and energy changes

When an acid and a base react, a particular type of salt is formed. This is an example of what type of reaction? A. physical only B. chemical only C. physical and chemical

A chemist adds 0.55 L of a 4.69M silver nitrate (AgNO3) olution to a reaction flask. Calculate the mass in kilograms of silver nitrate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.