Please help me in Chemistry :)​ 1.) Write 2 points of difference between water molecule and hydrogen molecule.

2.) Differentiate between homogeneous and heterogeneous mixture.
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Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

In which of these cases are the two wave points considered to be in phase with each other?

What happens when the temperature of a solution increases?