Is tarnishing silver physical or chemical

What is silicone used for

In reaction CFCl3 + UV Light - > CFCl2 + Cl, there is only one reactant (CFCl3) and no collision So, why did a reaction take place?

2C3H7OH (l) + 9O2 (g) → 8H2O (g) + 6CO2 (g) ΔHreaction = 1,830 kJ/mol Calculate the enthalpy of combustion for 55.9g isopropanol given the molecular weight of isopropanol is 60.096 g/mol.

Is Li2o+h2o=LiOH combustion

How do you the density of a matchbox car which has a mass of 10 grams and the water level in the cylinder rises from 41 ml to 46 ml when it is dropped in?

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