Which of the following options give the correct number of moles AND the correct number of atoms in a 3.54-g sample of copper (Cu)? Avogadro's number is 6.022 × 1023. Select both correct answers.
Question
Which of the following options give the correct number of moles AND the correct number of atoms in a 3.54-g sample of copper (Cu)? Avogadro's number is 6.022 × 1023. Select both correct answers.
Solution
To answer this question, we first need to know the molar mass of copper (Cu). The molar mass of copper is approximately 63.55 g/mol.
Step 1: Calculate the number of moles in the sample. The number of moles (n) can be calculated using the formula: n = mass (g) / molar mass (g/mol)
So, for a 3.54-g sample of copper: n = 3.54 g / 63.55 g/mol = 0.0557 mol
Step 2: Calculate the number of atoms in the sample. The number of atoms can be calculated using Avogadro's number (6.022 x 10^23 atoms/mol). The formula is: Number of atoms = number of moles * Avogadro's number
So, for our sample: Number of atoms = 0.0557 mol * 6.022 x 10^23 atoms/mol = 3.35 x 10^22 atoms
So, the correct options are 0.0557 mol and 3.35 x 10^22 atoms.
Similar Questions
How many copper, Cu atoms are present in a sample of copper with a mass of 662.4 amu? 42096. 64. 6.277 ×× 1024 12. 10.
Calculate the correct number of moles AND formula units in 7.3 x 10–3 g of CaSO4. Avogadro's number is 6.022 x 1023.
How many electrons are present in a copper atom?a.4b.14c.23d.29Clear my choice
What is the definition of Avogadro’s number?The number of particles in one mole of a substanceThe number of particles in one gram of a substanceThe number of moles in one gram of a substanceThe number of grams in one mole of a substance2Which of the following is the best definition for one mole of any substance?Has the same mass as the Mr of that substanceIs expressed in gramsContains 6×1023 particlesContains 6×1023 particles and has the same mass in grams as the Mr of that substance3What is the mass of one mole of fluorine gas?38 g19 g18 g9 g4How many moles are there in 54 g of water?42315Five moles of an unknown element have a mass of 35 g. What is the element?OxygenLithiumSodiumCarbon
How many moles of gold, Au, would have the same number of atoms as 84.0 g of silver, Ag?
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.