How many Significant Figures does the number 0.005000 have? 4 5 1 2 3 2- 107 1.0

Question

How many Significant Figures does the number 0.005000 have?

4

5

1

2

3

2-

107

1.07

2.88

81.1

93.3

.Q3-

4, 50, 16, 18

1, 5, 2, 2

2, 2, 7, 1

1, 13, 8, 9

2, 25, 16, 18

Q4----

What is the mass % of oxygen in lead (II) nitrate (Pb(NO3)2) rounded to three significant figures?

4.83

19.3

29.0

14.5

0.331

4

5

1

2

3

2-

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:

CaO (s) + H2O (l) Ca(OH)2 (s)

In a particular experiment, a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)2 is recovered. What is the percent yield in this experiment?

107

1.07

2.88

81.1

93.3

.Q3-

When the following equation is balanced, the coefficients are ________.

C8H18 + O2   CO2 + H2O

4, 50, 16, 18

1, 5, 2, 2

2, 2, 7, 1

1, 13, 8, 9

2, 25, 16, 18

Q4----

What is the mass % of oxygen in lead (II) nitrate (Pb(NO3)2) rounded to three significant figures?

4.83

19.3

29.0

14.5

0.331

Explanation / Answer

The number is 0.005000.

According to the significant number rules, the leading zeros before a non-zero value are not significant.

So, the number 0.005000 has 4 significant figures.

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