What's a closed system? Explain

Physical or chemical agent known as "blank" can cause mutations in DNA

Ethanol can react with hydrochloric acid to form chloroethane and water. When sulfuric acid is added, the reaction proceeds more quickly The sulfuric acid is still present when the reaction is complete.

In which orbitals the valence electrons for carbon (C) be placed

What transforms energy in food molecules into usable energy

Do elements of the halogen family lose one electron to become halide ions

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda