How many atoms are in a 5.00 mg sample of oxygen?
1.9 × 1020
9.4 × 1022
6.0 × 1021
1.9 × 1023
5.3 × 1022
How many atoms are in a 5.00 mg sample of oxygen? 1.9 × 1020 9.4 ×...
How many atoms of oxygen are in 350 mg of calcium nitrate? 2.07 × 1026 9.48 × 1025 7.7 × 1021 2.1 × 1026 1.3 × 1021
19 How many hydrogen atoms are in a 1.0 g sample of acetic acid, CH3COOH? The molar mass of acetic acid is 60.06 g- mor-1. 4.0 x 1022 atoms H 2.5 x 1021 atoms H 1.0 x 1022 atoms H 3.6 x 1025 atoms H
* 10 What is the mass in grams of a sample of Mg(CIO3)2 that contains 6.0 x 1020 atoms of oxygen? (A) 31717. grams (B) 3. 1529 x 1047 grams (C) 1. 1502 grams (D) 31. 299 grams 11 Name the compound Pb(NO3)4. (A) lead (II) nitrite (B) lead (II) nitrate (C) lead (IV) nitrate (D) lead (III) nitride 12 What is the mass % of carbon in (C2H SO)? (A) 7.74% (B) 60.0 % (C) 20.6% (D) 30.7% (E)...
14. A sample of oxygen gas has a volume of 4.50 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? A) 1.16 x 1023 B) 5.8 x 1022 C) 2.32 x 1024 D) 1.16 x 1022 E none of these
How many oxygen atoms are in 3.02 moles of MgSO4? 1.82 x 1024 atoms 1.59 x 1023 atoms 2.41 x 1024 atoms O 7.27 x 1024 atoms
51. How many atoms of aluminum can be produced by the decomposition of 13.3 g of aluminum oxide? (Hint: Write down the balanced equation before solving.) a. 3.14 x 1023 aluminum atoms b. 1.57 % 1023 aluminum atoms c. 7.86 x 1022 aluminum atoms d. 3.93 x 1022 aluminum atoms e. None of these
How many moles of atoms are in each elemental sample? 3.88×1022 He atoms
1. How many ATOMS of phosphorus, are present in 4.10 moles of tetraphosphorus decaoxide, P4O10? __________ atoms of phosphorus 2. How many MOLES of oxygen are present in 1.75×1021 molecules of tetraphosphorus decaoxide? ___________ moles of oxygen 3. How many ATOMS of phosphorus are present in 7.95 grams of tetraphosphorus decaoxide, P4O10? ________atoms of phosphorus 4.How many GRAMS of oxygen are present in 1.75×1021 molecules of tetraphosphorus decaoxide? _________grams of oxygen
One mole of oxygen molecule contains how many atoms of oxygen? Show work. Select one: a. 6.022 x 1023 b. 1.204 x 1024 c. 1.6021 x 10−19 d. 1.6021 x 1019
QUESTION 15 Isopropyl alcohol has a formula of C3H80. How many carbon atoms are there in 1.00 g of the substance? For atomic weights you can use 12.0 g/mol for C, 1.01 g/mol for H, and 16.0 g/mol for O. Less than 2.0*1023 atoms. Between 2.0*1023 atoms and 4.0*1023 atoms. Between 4.0*1023 atoms and 6.0*1023 atoms. Between 6.0*1023 atoms and 8.0*1023 atoms. More than 8.0*1023 atoms.