WorksheetsCHAPTER 1_CHEMISTRY & NOMENCLATURE
Total questions: 12
Worksheet time: 11mins
How many atoms are in 0.551 g of potassium (K)?
39.01 atoms K
6.022x1023 atoms K
8.48x1021 atoms K
How many grams of CH2Cl2 are obtained in 2.88 moles of CH2Cl2? (Ar of H: 1.0, C: 12.0 and Cl: 35.5)
244.8 g
254.4 g
246.4 g
234.8
Calculate the number of Br atoms in 32 g Br2? (Ar Li: 7, H: 1, S: 32 and O: 16)
2.4x1023 atom Br
1.2x1023 atom Br
0.2 atom Br
5113.6 atom Br
How many moles of pttasium atoms are present in 7.83x1023 molecules of K3PO4?
1.3 mol of K atoms
3.9 mol of K atoms
0.43 mol of K atoms
2.3 mol K atoms
Convert 71.6 kg to ng
7.16 x 1013 ng
71.6 x 10-6 ng
7.16 x 1012 ng
7.16 x 10-6 ng
Convert 49.1 mm3 to liters
4.91 x 10-5 L
49.1 x 10-5 L
4.91 x 102 L
49.1 x 102 L
what is the chemical nomenclature for HClO4?
(a)
What is the chemical nomenclature for SiCl4
(a)
A 18.72 g sample of nickel metal is placing in a graduated cylinder initially containing 10.3 mL of water, causing the water level in the cylinder to rise to 18.7 mL. Calculate the density of the nickel metal
2.2 g/ml
1.8 g/ml
Convert -271 K to 0F
-956.47 F
-947.47 F
-934.47 F
An element, X, has the following isotopic composition: X-200, 90%; X-199, 8.0%; and X-202, 2.0%. Determine its average atomic mass.
199.96 amu
200.33 amu
State number of significant figures in 0.0571100 × 104
6 SF
8 SF
5 SF
4 SF
