Answer:
101.3 kPa / 1 atm (first choice)
Explanation:
1 atm = 101.3 kPa, so to convert atm to kPa, just multiply the given value by 101.3 kPa.
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Answer:
Galileo Galilei
What launched the era of modern science in the 17th century? Modern science began in the 17th century, when the Italian physicist Galileo Galilei revived the Copernican view.
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Explanation:
Answer:
1.33 x 10^-3 mol H2
Explanation:
? mol H2 = 8.00 x 1020^20 molecules H2 x 1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2
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The balanced equation for the above reaction is;
Ca + S ---> CaS
stoichiometry of Ca to S is 1:1
Number of Ca moles - 1.6 g/ 40 g/mol = 0.04 mol
Number of S moles - 4.25 g / 32 g/mol = 0.13 mol
since Ca to S molar ratio is 1:1, there's excess amount of S present.
Ca is the limiting reactant.
stoichiometry of Ca to CaS is 1:1
Number of CaS moles to be formed - 0.04 mol
Therefore mass of CaS - 0.04 mol x 72 g/mol = 2.88 g
therefore theoretical yield is 2.88