show work
10. Divide 1436 by 203. The answer expressed to the correct number of sig figs is: a) 0.141 b) 0.1414 c) 7.07 d) 7.074 11. Add 114.32+12.1+ 13. The answer expressed to the correct number of sig figs is: a) 139 b) 139.4 c) 139.42 d) 140 12. The mass of a substance is 17.46 grams and its volume is 3.42 mL. What is the density of the substance rounded to the proper number of sig figs? a) 0.1959 g/mL b) 0.196 g/mL c) 5.105 g/mL d) 5.11 g/mL 13. Consider the element sodium, Na, and answer the following questions: a) b) c) Is it a metal, nonmetal or metalloid? What name is given to the group it belongs to on the periodic table? is it a representative element or a transition element?
Solution
10) 1436/203 = 7.074
answer: c) 7.07
11) 114.32 + 12.1 + 13 = 139.4
answer: b) 139.4
12) density (d) = mass / volume
= 17.46/3.42
= 5.105 g/ml
answer: d) 5.11 g/ml
13) sodium,Na
a) metal
b) alkali metals(1st group)
c) representatiove element.
.
show work 10- Divide 1436 by 203- The answer expressed to the correct.docx
1. show work
10. Divide 1436 by 203. The answer expressed to the correct number of sig figs is: a) 0.141 b)
0.1414 c) 7.07 d) 7.074 11. Add 114.32+12.1+ 13. The answer expressed to the correct number
of sig figs is: a) 139 b) 139.4 c) 139.42 d) 140 12. The mass of a substance is 17.46 grams and its
volume is 3.42 mL. What is the density of the substance rounded to the proper number of sig
figs? a) 0.1959 g/mL b) 0.196 g/mL c) 5.105 g/mL d) 5.11 g/mL 13. Consider the element
sodium, Na, and answer the following questions: a) b) c) Is it a metal, nonmetal or metalloid?
What name is given to the group it belongs to on the periodic table? is it a representative element
or a transition element?
Solution
10) 1436/203 = 7.074
answer: c) 7.07
11) 114.32 + 12.1 + 13 = 139.4
answer: b) 139.4
12) density (d) = mass / volume
= 17.46/3.42
= 5.105 g/ml
answer: d) 5.11 g/ml
13) sodium,Na
a) metal
b) alkali metals(1st group)
c) representatiove element.
