to the following reaction
2C^2H^2+5O^2-------->4CO^2+2H2O
HOW MANY GRAMS OF EACH PRODUCT ARE PRODUCED WHEN 2.50x10^4 of C^2H^2 BURNS COMPLETELY
2007-05-13 23:53:26 · 3 answers · asked by sxe 1 in Science & Mathematics ➔ Chemistry
Work sites are starting to use Gasoline under pressure instead of acetylene
2007-05-13 23:58:23 · answer #1 · answered by MCE 2 · 3⤊ 3⤋
Atomic weights: C=12 H=1 O=16 C2H2=26 CO2=44 H2O=18
2.50x10^4gC2H2 x 1molC2H2/26gC2H2 x 4molCO2/2molC2H2 x 44gCO2/1molCO2 = (2.5x10^4)(4)(44)/(26)(2) = 8.46x10^4gCO2
The 2.50x10^4gC2H2 is given. The first factor comes from the molecular weight of C2H2. The g C2H2 cancel,leaving moles C2H2. The next factor comes from the balanced equation. Moles C2H2 cancel, leaving moles CO2. The final factor comes from the molecular weight of CO2. The moles CO2 cancel, leaving g CO2. Note that the 4 in the numerator cancels the 2 in the denominator, reducing the number of calculator keystrokes.
To get g H2O, substitute 2molH2O/2molC2H2 x 18gH2O/1molH2O for the last two factors.
2007-05-14 01:59:14 · answer #2 · answered by steve_geo1 7 · 1⤊ 0⤋
for the first ques you try using the formula, no.of moles= mass in gram/ relative molecular mass so u should divide this 75g with the Mr of AgNo3. u'll get the no. of moles for AgNo3. after that use the same formula in which u use the previous ans multiplied by the mr of Agcl. from this u'll get the mass of Agcl. from that use again the same formula and use the mass and Mr of Agcl. u'll get the ans. I hope. i'm not too sure for the 2nd ques..
2016-05-17 21:24:05 · answer #3 · answered by tereasa 4 · 0⤊ 0⤋