How is the number of moles of an element determined from a known mass? A. The known mass is multiplied by Avogadro's number to get moles.
B. The known mass is divided by Avogadro's number to get moles.
C. The atomic number is used as a conversion factor to convert
grams to moles.
D. The mass of 1 mole of the element is used as a conversion factor
to convert grams to moles.

What overall charge must all compounds have

What is another way to determine mass times acceleration?

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal