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10g C2H2/26.0 g/mol= 0.38 mol
0.38 x 64.04 g/mol= 24g CaC2
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Does the compounds C2H2 and C6H6 have the same percent composition by mass?
It does not necessarily mean that. For example glucose (C6H12O6) and formaldehyde (CH2O) have the same percentages of elements by mass, but are two very difference compounds.
How many moles are in 0.244 grams of calcium carbide?
The chemical formula for Calcium Carbide is CaC2. So to find how many moles are in 0.244 grams of CaC2, you must first find the molar mass. Ca = 40.08 g/mol C = 12.01 g/mol Now that you have the molar mass, you just add it all together. Since there are two Carbon, you add it's mass twice. 40.08 + 12.01 + 12.01 = 64.1g Now you use Stoichiometry to convert the .244g to moles. 0.244g * (1 mol) / (64.1 g) = .00380655 mol The final answer would round to 0.00381 mol
How is an objects mass related to the upward force needed to overcome the pull of gravity?
Times the objects weight (In kilograms) by (approximately) 9.81 to get the objects mass on Earth. This figure, is the amount of Newtons (N) needed to overcome the pull of gravity. Example. A cat weighs 10Kg. 10X9.81 = 98.1N It would take 98.1N to lift this cat off the ground.
Why is a greater amount of force needed to accelerate a truck than a jeepney even if they are running with the same velocity?
The truck has a greater mass and therefore a greater amount of inertia to overcome. To accelerate a greater mass requires a greater force.
What is the speed it takes to move a 1 kilogram mass in one hour?
To know the speed of an object we need to know the distance the object travels and the time it takes. The object's mass is not needed. Since we do no know the distance in this case, we cannot solve to find its speed.
How many grams of water are needed to react with 492 g of calcium carbide?
Assuming pure calcium carbide: CaC2 + 2 H2O → C2H2 + Ca(OH)2 Molar mass of CaC2 = 64.1 Molar mass of water =18 ∴ no mol of CaC2 = 492/64.1=7.68mol ∴ no mol H2O =2*7.68=15.35mol ∴mass H2O = 15.35*18 = 276.3g of water
What mass of calcium bromide is needed to prepare 250 ml of a 2.50M?
The answer is 124,93 g (for the anhydrous CaBr2).
How many grams of K2SO4 would be needed to prepare 4.00 L of a 0.0510 M solution?
The needed mass is 35,549 g.
What is the mass of sodium hudroxide needed to prepare 100 mL of a 0.10 M solution?
1.17 grams :)
What mass of K2CO3 is needed to prepare 200 mL of a solution having a potassium ion concentration of 0.150 M?
2.07g
How many carbon atoms are contained in 84.3 g of ethyne (c2h2)?
3.90x10^24 atoms To arrive at an answer in units of carbon atoms, first we must cancel out the grams by diving 84.3g C2H2 by the molar mass of C2H2 (26.038g/mol). This molar mass is calculated by adding the masses of 2 carbon atoms (12.011g/mol) and 2 hydrogen atoms (1.008g/mol). This renders units of moles of ethyne. Next multiply by Avagadro's number (6.022x10^23 atoms/mol) to cancel the moles of ethyne and reach atoms of ethyne. Finally, because there are 2 carbon atoms in C2H2, multiply by 2 atoms Carbon/1 atom C2H2 to reach the final answer of 3.90x10^24 atoms of Carbon. This answer has been rounded to three significant figures because the lowest known value of significant figures throughout the calculations was three (84.3). The entire process is as follows: 84.3g C2H2 x (1 mol C2H2)/(26.038 g C2H2) x (6.022x10^23 atoms C2H2)/(1 mol C2H2) x (1 atoms C2H2)/(2 atom C) = 3.90x10^24 atoms C
How does china prepare for an earthquake?
They mass produce...
What mass of calcium bromide is needed to prepare 150.0 mL of a 3.50 M solution?
3.5M / 1000, x 150 = how many moles you need. = .525 moles. moles = mass / molec mass. molec mass if cabr2 is 199.86 g/mol. .525 x 199.86 is 104.93g CaBr2
How many grams of koh are needed to prepare 250 milliliters of a 2 m solution of koh formula mass 56?
28 gram. = 2 * 56 * 250 / 1000
How many grams of H20 can be produced by the reaction of 2.40mol c2 h2 with 7.40mol O2?
The equation for the reaction is 2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O. Therefore, the minimum mole ratio of O2 to C2H2 to permit complete reaction is 5/2. The actual ratio present, 7.40/2.40 or about 3.08, is greater than this minimum; therefore, all the available C2H2 will react. The reaction equation shows that the number of moles of H2O produced is the same as the number of moles of C2H2 reacted. Therefore, 2.40 moles of H2O are produced. The gram molecular mass of H2O is about 18.015; therefore the mass of water produced is 43.2 grams, to the justified number of significant digits.
How many moles of acetylene (C2H2) are needed to completely react with 12 moles of oxygen?
The reaction is:2 C2H2 + 5 O2 = 4 CO2 + 2 H2OThe answer is 4,8 moles oxygen.
Does the compounds C2H2 and C6H6 have the same percent composition by mass?
It does not necessarily mean that. For example glucose (C6H12O6) and formaldehyde (CH2O) have the same percentages of elements by mass, but are two very difference compounds.
