ปัญหา 1เลือกประเภทWhat do we call the chemistry unit to quantify the amount of a substance?particleskilogrammoleliter
ปัญหา 2เลือกประเภทOne mole is equal to how many particles (molecules, atoms)?6.02 x 10^23 6.02 x 10^24 6.02 x 10^25 6.02 x 10^26
ปัญหา 3เลือกประเภทHow many molecules are in 2.00 moles of H2O? 1.20x10^23 molecules of H2O1.20x10^24 molecules H2O6.02x10^23 molecules H2O6.02x10^24 molecules H2O
ปัญหา 5เลือกประเภทB2H6 + 3 O2 → 2 HBO2 + 2 H2O What mass of O2 (in grams) will be needed to burn 36.1 g of B2H6? Ar H = 1, Ar O = 16, Ar B = 11112124164168
ปัญหา 6คำตอบสั้น2 Na + 2 H2O → 2 NaOH + H2 How many dm3 of hydrogen are produced (in R.T.P) if 120 g of Na are reacted? Ar H = 1, Ar Na = 2362.662.6062.61