The formula of cupric sulfate is? A. Cu(SO4)2 B. CuSO3 C. CuSO4 D. Cu(SO3)2 Q2: A silicon chip has a mass of 6.2g. The no. of moles of silicon in the chip is? A. 0.44 mol B. 0.22 mol C. 170 mol D. 87 mol Q3: A 0.22 mol silicon chip has how many number of Si atoms

Q: Which of the following has the most moles of substance? a. 10.0 g He b. 5.0 x 10²³ atoms Ne c.…

A:

Q: 13. How many oxygen atoms are in 225 g of O2? a. 4.23 x 1024 b. 6.84 x 1024 c. 8.47 x 1024 d. 1.69 x…

A: Number of Atoms of Oxygen can be calculated as -

Q: Calculate the percent by mass of each element in the following compounds to one decimal place. a.…

A: The Answers to both the questions are given as:

Q: Find the mass of 1 molecule of NaH in gram. O a. 3.98 x10-23 O b. 12 O c. 23.99 O d. 3.98 x1023

A: Molar mass amount(1 mole) of any compound contains Avogadro number6.022×1023 of molecules. Molar…

Q: a. Oxalic acid is a crystalline solid with the molecular formula H2C2O4. A sample of pure oxalic…

A:

Q: percent of iron in the iron oxide"

A: Given data:-0.220 g of iron atomic weight = 55.85 g/molis burned with oxygen.→ 0.341 g of iron  is…

Q: The composition of a commercial cold remedy mixture is 87% aspirin, 7% caffeine, 6% vitamin C. What…

A: Mass of mixture that contains 5 g Caffeine = ? % of aspirin = 87 % % of caffeine = 7% % of vitamin C…

Q: Which of the following statements is not correct? A. 12.01 g of C contains 6.022 x 1023 atoms of C…

A: 1 mol of any substance contains Avogadro's number of particles (atom/ion/molecule etc.). Avogadro's…

Q: 0.4 moles of calcium carbonate contains how many carbon atoms?     A. 1.2 x 1023   B. 4.8 x…

A: The formula of calcium carbonate = CaCO3  Molecular weight of CaCO3 is 100 gm/mol  1 mole CaCO3 =…

Q: Calculate mass (in grams) of sodium in 8.5 g of each sodium- containing food additive. a. NaCl…

A: Since you are asked for multiple sub-parts , we are entitled to solve first three.

Q: The molar mass for F e (C O 3 ) is: A. 251.4 grams/mole B.115.8 grams/mole C.139.8 grams/mole D.83.8…

A: We have given that  The molar mass for Fe(CO3) is: A. 251.4 grams/mole B.115.8 grams/mole C.139.8…

Q: 18. The chemical formula for hydrogen sulfide is H,S. What is the percent composition by mass of…

A: Step 1: Solution Given,Compound = H2Smolar mass of : hydrogen(H) = 1 g/mol, Sulfur(S) = 32…

Q: 0.6 moles of strontium phosphate contains how many oxygen atoms?     A. 0.8 NA   B. 2 NA   C.…

A: Answer: Molecular formula of Strontium Phosphate: Sr3(PO4)2

Q: How many carbon atoms are in a pure diamond (all carbon) with a mass of 52.00 mg? A. 4.330 x 103 O…

A: Given: Mass of carbon = 52.00 mg = 52×10-3 g (since 1 g = 103 mg) Atomic mass of carbon = 12 g/mol

Q: What is the number of molecules in 319g of Li2SO4? (Take NA = 6 x1023)

A: The question is based on mole concept. We have  to determine number of molecules present in the…

Q: What is the mass in grams per mole?

A: Information about the question

Q: How many oxygen atoms are present in 3,0 x 1023 molecules of Ca(NO3)2?   A. 6.0 x 1023   B. 1.5…

A: 1 molecule of Ca(NO3)2 have 6 oxygen atoms as NO3 have 3 oxygens and (NO3)2 will have 3 x 2 = 6…

Q: What is the mass percent (%) for K in K2CrO4? A. 26.48 B. 38.09 C. 85.48 D. 40.66 E. 56.48 I…

A:

Q: How many iron ions are present in 43.6 g of Fe203? Select one: O a. 1.64 x 1023 ions O b. 2.63 x…

A:

Q: 4. A. HBr, ROOR D. HBr G. HC=CNa 5. A. HBr, ROOR D. HBr G. NaOH 6. A. t-BuOK D. H₂SO4, H₂O, HgSO4…

A: Given are organic reactions.

Q: An unknown compound comprised of osmium and chlorine is 40.11% osmium by mass. a. If you assume…

A: Hello. Since the question contains more than three sub-parts, the first three sub-parts shall be…

Q: Match the correct number of nitrogens with the correct situation that you see below v 2 NH4NO3 A. 4…

A: Count the no. of N' atom by simply multiply by its coefficient.

Q: A compound containing carbon, oxygen, and hydrogen was found to have an empirical formula of CH,0.…

A: Empirical Formula is CH2O Formula mass of CH2O = 1 x Atomic mass of C + 2 x Atomic mass of H + 1x…

Q: 1. A. What is the mass in grams of atoms of strontium? grams B. How many strontium atoms are there…

A: We have to apply mole concept

Q: 30. An aluminum alloy contains 0.091 mol aluminum and 0.038 mol of magnesium. Determine the mass…

A:

Q: Calculate the mass percent of Carbon (C) in Carbon dioxide (C02).A. 27.3% CB. 42% CC. 37.5% CD. 100%…

A: The mass percentage is calculated as the mass of a component divided by the total mass of the…

Q: 1. Which of the following statements is TRUE? Show your proof. I. The molar mass of CaCO, is 100.1…

A: NOTE - Here chemical compound is CaCO3 1mol of any substance contains 6.023 × 1023 Number of mols =…

Q: Molar mass is defined as: a. the mass of one mole of a substance in grams. b. the mass of one gram…

A: option a

Q: You have 53 carbon atoms. What is the mass? Which units should you use g/mol or amu? a. 686.58 amu…

A: Answer: No option is correct. The correct answer is 636.53 amu We should use amu unit instead of…

Q: What is the total number of atoms contained in 3.00 moles of cobalt?

A: Given :- number of moles of Co = 3.00 mol  To calculate :- number of atoms of Co

Q: 4.00 moles of carbon have a mass of? a. 4.60 g b. 23.0 g c. 92.0 g d. 11.0 g e. 48.0 g

A: The molar mass of carbon=12 g/mol The given number of moles of Carbon=4.0 mol

Q: Find the mass of 1 molecule of NaH  in gram. a. 12 b. 3.98 x10-23 c. 23.99 d. 3.98 x1023

A:

Q: How many formula units are in 0.761 g of iron(III) nitrate?   A. 1.89 x 1021 f.u.   B. 3.13 x…

A: Interpretation: The amount of formula units are in 0.761 g of iron(III) nitrate is to be calculated.

Q: 10. What does Avogadro's number represent? a. the number of atoms in 1 mol of an element b. the…

A:

Q: a. Use the average atomic mass to calculate the number of moles of the element present in 6.70 g of…

A: a) given, mass of neon = 6.70 g Number of moles of neon = ? Note: Atomic mass of neon = 20.18 g/mol

Q: Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of Prevacid…

A: Given, Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of…

Q: The formula for nitrogen dioxide is NO₂2. a. How many grams of nitrogen are present in 3.85 moles of…

A: Here, we have to calculate the mass of nitrogen that is present in 3.85 moles of NO2 and the number…

Q: Calculate the percent by mass of each element in the following compounds. a. Methane, CH4 b.…

A: Percent by mass is simply the ratio of atomic mass of element present in compound to total molar…

Q: 13. The molar mass of an element is numerically equivalent to what? a. 1 amu c. 1 mole d. its atomic…

A:

Q: How many atoms of Hydrogen are in 1.96 moles of Hydrogen?

A:

Q: What can be said about 1 mole of Ag and 1 mole of Au? A. They have the same molar mass. B. They…

A: What can be said about 1 mole of Ag and 1 mole of Au? A) They have the same molar mass. B) They…

Q: Use the References to access important values if needed for this question. According to the…

A: