Why aluminium foils are use to wrap food items

A microbiologist is preparing a medium on which to culture e. coli bacteria. she buffers the medium at ph 7.00 to minimize the effect of acid-producing fermentation.

A chemical reaction produces. 884 mols of H2S gas. what volume will the gas occupy at STP? Knowing the molar mass is 32.0 g/mol, what is the density of this gas?

What is meant by localised orbitals? Explain.

Given the balanced ionic equation representing the reaction in an operating voltaic cell: zn (s) + cu2 + (aq) → zn2 + (aq) + cu (s) the flow of electrons through the external circuit in this cell is from the

Why is lewis electron-dot diagrams more suitable than electron-shell diagrams illustrating chemical bonds

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