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 moles of atoms are in each elemental sample? A) 3.6 x 1024 Pb atoms (24th power) B) 3.7 x 1022 He atoms (22nd power) C)7.36 x 1023 K atoms (23rd power) D) 4.5 x 1021 Ca atoms (21st power)
How many oxygen atoms are there in 6.00 g of sodium dichromate, Na 2Cr 2O 7? 0.160 oxygen atoms 1.97 × 1021 oxygen atoms 1.37 × 1022 oxygen atoms 9.65 × 1022 oxygen atoms
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
How many moles of atoms are in each elemental sample? 1. 3.31×1022 HeHe atoms 2. 6.96×1023 KK atoms 3. 4.34×1021 CaCa atoms 4. 1.34 gg Zn 5. 16.0 gg Ar 6. 72.5 gg Ta 7. 2.24×10−2 gg Li What is the mass in grams of each elemental sample? 6.67 mol W 0.585 mol Ba 68.2 mol Xe 1.58 mol S
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