Answer: 1.5 x 10^24
Explanation: Just multiply 2.5 by avagadro's number 6.2 x 10^23 to get the answer.
Answer:
Molaresحخىطنصثىخرنص رهصجتخطرةصخىر رصىشطثرىنصكرىصخكترة شصر
Answer:
120g
Explanation:
Based on the reaction, when 1 mole of propane and 5 moles of oxygen react, 3 moles of CO2 and 4 moles of H2O are produced. The ratio of production is 3 moles of CO2 per 4 moles of H2O.
Thus, we need to convert mass of water to moles using its molar mass:
Moles H2O (Molar mass: 18g/mol):
63g H2O * (1mol / 18g) = 3.5 moles H2O
Converting to moles of CO2:
3.5 moles H2O * (3 moles CO2 / 4 moles H2O) = 2.625 moles CO2
Mass CO2 (Molar mass: 44g/mol):
2.625 moles CO2 * (44g / mol) = 115.5g of CO2 are released
<h3>120g
</h3>
To convert the given value we need conversion factors to relate molecules to liters. At STP, we know that 1 mol is equal to 22.4 L and by using Avogadro's number we can relate molecules to 1 mol. Calculation is as follows:
5.0x10^24 molecules ( 1
mol / <span>6.022 x 10^23 molecules<span> ) ( 22.4 L / 1 mol) = 186.0 L </span></span>
Answer:
MgSO4. 7H2O
There are seven water molecules attached to the hydrated salt.
Explanation:
From the equation;
Number of moles of hydrated salt = number of moles of anhydrous salt, we obtain:
Mass of hydrated salt/ molar mass of hydrated salt = mass of anhydrous salt/ molar mass of anhydrous salt
From the question;
Mass of hydrated salt = 1.000g
Molar mass of hydrated salt = 120.366 +18x gmol-1
Mass of anhydrous salt= 0.488g
Molar mass of anhydrous salt= 120.366 gmol-1
Substituting into the equation above;
1.000/120.366 +18x = 0.488/120.366
1.000/120.366 +18x = 0.004
1.000= 0.004 (120.366 +18x)
1.000= 0.48 + 0.072x
1.000 - 0.48 = 0.072x
0.52= 0.072x
x= 0.52/0.072
x=7
Therefore the hydrated salt is MgSO4. 7H2O
