Wasses Fill in the calculation triangle for changing between masses and moles. Then complete the table below. (Use the
following A values: H=1, C = 12, N = 14,0 = 16, Mg = 24, S = 32, CI = 35.5, Ca = 40, Cu = 64.)
Substance Ar or Mr number mole G
cu ? ? 128
some pls i dont understand that traingle how to fill i finded ar and mole gramm pls help me​

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?