If 0.4g of methane was burned to heat 500cm3 of water what would be the maximum temperature rise of the water? The enthalpy of combustion of methane (CH4) is -882kJ/mol.

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?