If you weighed out 0.38 grams of calcium and reacted it with excess amount of HCI how many miles of H2 grams would you expect to produce?
To determine the amount of H2 gas produced, we need to use stoichiometry and the balanced chemical equation for the reaction between calcium (Ca) and hydrochloric acid (HCl):
Ca + 2HCl → CaCl2 + H2
Let's calculate the molar mass of Ca:
Ca: 40.08 g/mol
Next, we need to convert the given mass of Ca into moles:
moles of Ca = mass of Ca / molar mass of Ca
moles of Ca = 0.38 g / 40.08 g/mol
moles of Ca = 0.009488 moles
According to the balanced equation, 1 mole of Ca reacts to produce 1 mole of H2 gas. Therefore, the number of moles of H2 gas produced will be the same as the moles of Ca:
moles of H2 gas = moles of Ca = 0.009488 moles
Lastly, we can calculate the mass of H2 gas produced using its molar mass:
molar mass of H2 = 2.02 g/mol
mass of H2 gas = moles of H2 gas × molar mass of H2
mass of H2 gas = 0.009488 moles × 2.02 g/mol
mass of H2 gas = 0.01912656 g
So, you would expect to produce approximately 0.0191 grams of H2 gas.
To determine the number of grams of H2 gas produced, we need to use stoichiometry, which involves using the balanced chemical equation and molar ratios.
First, we need to write the balanced chemical equation for the reaction between calcium (Ca) and hydrochloric acid (HCl):
Ca + 2HCl -> CaCl2 + H2
From the equation, we can see that for every 1 mole of calcium (Ca), 1 mole of hydrogen gas (H2) is produced.
Next, we need to find the number of moles of calcium (Ca) using its molar mass. The molar mass of calcium is 40.08 g/mol.
Number of moles of calcium (Ca) = mass of calcium (g) / molar mass of calcium (g/mol)
Number of moles of calcium (Ca) = 0.38 g / 40.08 g/mol
Now, since the reaction occurs with an excess amount of hydrochloric acid (HCl), all the calcium (Ca) will react. Therefore, the moles of calcium (Ca) will be equal to the moles of hydrogen gas (H2) produced.
Number of moles of hydrogen gas (H2) = number of moles of calcium (Ca)
Number of moles of hydrogen gas (H2) = 0.38 g / 40.08 g/mol
Finally, we need to convert the number of moles of hydrogen gas (H2) into grams using its molar mass. The molar mass of hydrogen is 2.02 g/mol.
Mass of hydrogen gas (H2) = number of moles of hydrogen gas (mol) * molar mass of hydrogen (g/mol)
Mass of hydrogen gas (H2) = (0.38 g / 40.08 g/mol) * 2.02 g/mol
By calculating the above expression, you will be able to find the predicted mass of hydrogen gas (H2) in grams.
Note: If you want to convert grams to miles, you will need to know the density of hydrogen gas and convert between units appropriately.
I assume you meant moles and not miles.
Ca + 2HCl ==> CaCl2 + H2
mols Ca = grams/atomic mass = ?
mols H2 = mols H2 (look at the equation. 1 mol Ca produces 1 mol H2)