19. A certain sample of dichlorine heptoxide consists of 4200 oxygen atoms combined with chlorine atoms. How many chlorine atoms are contained in the sample? A. 8400 oxygen atoms B. 4200 oxygen atoms C. 2100 oxygen atoms D. 1200 oxygen atoms 600 oxygen atoms E.

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: 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: 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: Write the symbol for the cation in each of the following ionic compounds:a. AuCl3      b. Fe2O3…

A: Hi, since you have posted questions with multiple subparts. We will answer the first three subparts…

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: How many moles are in 1.88 x 1022 Al atoms? A.) 2.00 moles B.) 0.500 moles C.) 0.312 moles D.)…

A: The number of moles of a substance is given as the mass of the substance upon its molar mass.

Q: Calculate the mass of each element.a. 5.22 mol of He              c. 2.22 mol of Tib. 0.0455 mol of…

A: The number of moles can be calculated using the mass of a substance as its mass divided by the molar…

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: 12. Complete combustion of 1.550 grams of a compound produces 1.250 grams of carbon dioxide and…

A: Given data :

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: which has the correct number of atoms in one molecule of dichlorine momooxide A. contains three…

A: To determine No of Atom in a molecule, we must know the molecular formula of that molecule Then we…

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: 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: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A: Given: Mass of copper(II) sulfate pentahydrate = 78.1 kg

Q: . What is the mass, in grams, of each of the following? a. 2.3*10^-3 mol Sb b. 3.59*10^-2 mol Ba…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The element rhenium (Re) has two naturally occurring isotopes, 185 Re and 187 Re. Rhenium is 62.60%…

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: Determine the number of moles in the given amount of each substance. Show or explain your work. a.…

A: 1 mole of any element / compound contains 6.02 * 1023 atoms / molecules  of that substance. Mass of…

Q: How many gold (Au) atoms are there in a 10. g sample of that is 50% Au by mass?  a. 6.2 x 1022 b.…

A:

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: How many moles of tungsten atoms are in 4.8 x 10^24 atoms in tungsten. a. 8.0x10^0 moles b.…

A: Given: No. of tungsten atoms =  4.8 x 1024 atomsRequired: no. of Moles of tungsten= ?

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: One mole of calcium contains____calcium atoms.

A:

Q: How many atoms of hydrogen are present in 4.54 g of ammonia? A. 6.64 x 1019 B. 8.20 x 1024 O C. 1.61…

A: We know that , 1 mole of substance contain  = 6.022 × 1023  atoms By using this relation , we can…

Q: 15. How many atoms are in a sample of 10.0 grams of silver? a. b. 5.58 x 1022 atoms 3.06 x 1022…

A: mole is equal to weight of substance divide by it's molar mass

Q: How many entities are present in each of the following? a. 8.44 mol argon atoms b. 1.1 x 10-¹2 mol…

A: For any substance, . In all the questions moles are given. Thus, the number of atoms can be…

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

A:

Q: An element's percentage of the total mass in a compound containing the element. A law stating that…

A: The composition of a chemical compound is determined using elemental analysis of inorganic elements.…

Q: How many oxygen atoms are in 1.50 mol of SO3?

A: Mole is a unit of quantity of substance. One mol of a substance contains 6.022 x 1023 units of that…

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: