319.3 grams of Na2O2 = ____________________________ molecules of Na2O2
Question
319.3 grams of Na2O2 = ____________________________ molecules of Na2O2
Solution
To find the number of molecules in 319.3 grams of Na2O2, you need to follow these steps:
-
First, find the molar mass of Na2O2. The atomic mass of Sodium (Na) is approximately 23 grams/mole and Oxygen (O) is approximately 16 grams/mole. So, the molar mass of Na2O2 = 2(23) + 2(16) = 78 grams/mole.
-
Next, find the number of moles in 319.3 grams of Na2O2. To do this, divide the mass of Na2O2 by its molar mass. So, 319.3 grams ÷ 78 grams/mole = approximately 4.09 moles.
-
Finally, find the number of molecules. Use Avogadro's number, which states that there are approximately 6.022 x 10^23 molecules in one mole. So, 4.09 moles x 6.022 x 10^23 molecules/mole = approximately 2.46 x 10^24 molecules.
So, 319.3 grams of Na2O2 is approximately equal to 2.46 x 10^24 molecules of Na2O2.
Similar Questions
923.7 grams of NaOH = _______________________ molecules of NaOH
<ol> <li>Mole Calculation Review:</li> </ol> <p>a. To calculate the number of moles from grams, we use the formula:</p> <p>moles = mass (g) / molar mass (g/mol)</p> <p>The molar mass of NaCl (Sodium Chloride) is approximately 58.44 g/mol and the molar mass of Na2CO3 (Sodium Carbonate) is approximately 105.99 g/mol.</p> <p>i. For 55 g of NaCl:</p> <pre><code> moles = 55 g / 58.44 g/mol = 0.94 moles </code></pre> <p>ii. For 0.025 g of Na2CO3:</p> <pre><code> moles = 0.025 g / 105.99 g/mol = 0.00024 moles </code></pre> <p>b. To calculate the mass in grams from moles, we use the formula:</p> <p>mass (g) = moles * molar mass (g/mol)</p> <p>i. For 0.5 moles of NaCl:</p> <pre><code> mass = 0.5 moles * 58.44 g/mol = 29.22 g </code></pre> <p>ii. For 2.11 moles of Na2CO3:</p> <pre><code> mass = 2.11 moles * 105.99 g/mol = 223.64 g </code></pre> <ol start="2"> <li>Molarity (mol/L) is a measure of concentration. It represents the number of moles of a substance per liter of solution.</li> </ol> <p>a. mol/L means moles per liter. It is a unit of concentration that tells us how many moles of a substance are present in one liter of solution.</p> <p>b. mol/L and grams/liter are both measures of concentration. The main difference between them is what they are measuring. mol/L measures the number of moles of a substance per liter of solution, while grams/liter measures the mass of the substance per liter of solution. The similarity is that both are used to express the concentration of a solution. However, mol/L takes into account the molecular weight of the substance, while grams/liter does not.</p> ####
CS2 and NaOH react according to the equation below.3CS2 + 6NaOH ⟶ 2Na2CS3 + Na2CO3 + 3H2OHow many grams of Na2CS3 can be produced from the reaction of 6.352 moles of CS2 and 8.958 moles of NaOH? Express your answer in the correct number of significant figures.
If there are 8.24 x 1022 molecules of NaCl in a salt shaker, what is the mass of the salt? First find the number of moles, then convert to grams.
What is the mass of 8 moles of sodium (Na) atoms?The Periodic TableA.183.9 gB.1.11 × 1026 gC.4.82 × 1024 gD.22.99 gSUBMITarrow_backPREVIOUS
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.