What is the name given to an alloy made from the two metals found in a penny?

What is the mass percent of oxygen in sodium bicarbonate (NaHCO3) ?

How do the crystallization and settling of the earliest formed minerals affect the composition of the remaining magma?

Your teacher has asked you to perform an experiment to see if the shape of objects, alone, affects the motion of objects. Which of the following would be the best experiment to perform?

Aluminum bronze contains 92.0% of copper and 8.0% aluminum. what maximum mass of aluminum bronze can be prepared from 73.5g of copper and 42.2g of aluminum?

A 22.4-L sample of which of the following substances, at STP, would contain 6.02 X 10^23 representative particles? a) oxygen b) gold c) cesium iodide d) sulfur

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change

How many moles of copper are needed to react with sulfur to produce 0.25 moles Ol copper (1) sulfide according to the following reaction: 2 Cu + S + Cuzs

If you wish to warm 52 kg of water by 22 ∘c for your bath, find what the quantity of heat is needed. express your answer in calories cal.

Which of the following compounds is the most soluble in water? a) propanoic acid b) propane c) propanal d) l-bromopropane

What mass of solid Na2CO3 is required to make 250.0mL of a 0.125M solution of Na2CO3?