How many grams of oxygen would be needed to completely react with 18 grams of methane (CH4) ?

What is the difference between alchemy and science

What is the moons role in causing tides?

What is the difference between the following: ions/atoms, isotopes/atoms

How many moles of calcium atoms do you have if you have 3.00 * 10²¹ atoms of calcium. (The mass of one mole of calcium is 40.08 g.)

Which of the following is a neutralization reaction? A. NaOH (aq) + HCl (aq) = NaCl (aq) + H2O (1), B. Pb (NO3) 2 + 2 KI = PbI2 + 2 KNO3, C. AgNO3 + HCl = AgCl + HNO3, D. Fe2O3 + HCl = FeCl3 + H2O

An insulator: A. Conducts heat well B. Does not conduct heat well C. Is used to heat cold objects D. Is used to cool hot objects

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)

Increasing the temperature of a liquid-solid solution will:

What is the most abundant substance dissolved in sea water? magnesium chloride sodium chloride

Problem 5.32 - enhanced - with feedback the rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically μr=0.002. suppose a 180,000 kg locomotive is rolling at 22 m/s on level rails.