(a) Interpretation: The number of significant digits in the answer should be determined by evaluating the given expression. ( 0.0432 ) ( 2.909 ) ( 4.43 × 10 8 ) . Concept Introduction: During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy. Decimal place is the position of digit right to the decimal point. In division and multiplication, the calculated values are always rounded up to minimum number of significant figures. Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations. Rules for rounding off numbers are as follows: If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up. If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
(a) Interpretation: The number of significant digits in the answer should be determined by evaluating the given expression. ( 0.0432 ) ( 2.909 ) ( 4.43 × 10 8 ) . Concept Introduction: During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy. Decimal place is the position of digit right to the decimal point. In division and multiplication, the calculated values are always rounded up to minimum number of significant figures. Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations. Rules for rounding off numbers are as follows: If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up. If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
The number of significant digits in the answer should be determined by evaluating the given expression.
(0.0432)(2.909)(4.43×108).
Concept Introduction:
During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy.
Decimal place is the position of digit right to the decimal point.
In division and multiplication, the calculated values are always rounded up to minimum number of significant figures.
Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations.
Rules for rounding off numbers are as follows:
If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up.
If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
Expert Solution
Answer to Problem 139AP
0.557×108.
Explanation of Solution
The expression is (0.0432)(2.909)(4.43×108). By calculating it we get, 0.556712784×108
In multiplication, the number of significant figures in final answer should be equal to the minimum number of significant figures in the calculation. The number with minimum number of significant figure is 4.43×108 thus, minimum number of significant figure is 3, thus, final answer should be rounded off up to three significant figures which is equal to 0.557×108.
Interpretation Introduction
(b)
Interpretation:
The number of significant digits in the answer should be determined by evaluating the given expression.
(0.8922)/[(0.00932)(4.03×102)]
Concept Introduction:
During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy.
Decimal place is the position of digit right to the decimal point.
In division and multiplication, the calculated values are always rounded up to minimum number of significant figures.
Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations.
Rules for rounding off numbers are as follows:
If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up.
If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
Expert Solution
Answer to Problem 139AP
23.74×10−2.
Explanation of Solution
The given expression is (0.8922)/[(0.00932)(4.03×102)]. By calculating it we get, 23.7542465×10−2
In multiplication and division, the number of significant figures in final answer should be equal to the minimum number of significant figures in the calculation. The number with minimum number of significant figure is 0.8922 thus, minimum number of significant figure is 4, thus, final answer should be rounded off up to four significant figures which is equal to 23.74×10−2.
Interpretation Introduction
(c)
Interpretation:
The number of significant digits in the answer should be determined by evaluating the given expression.
(3.923×102)(2.94)(4.093×10−3)
Concept Introduction:
During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy.
Decimal place is the position of digit right to the decimal point.
In division and multiplication, the calculated values are always rounded up to minimum number of significant figures.
Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations.
Rules for rounding off numbers are as follows:
If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up.
If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
Expert Solution
Answer to Problem 139AP
47.2×10−1.
Explanation of Solution
The given expression is (3.923×102)(2.94)(4.093×10−3). By calculating it we get, 47.20710666×10−1
In multiplication, the number of significant figures in final answer should be equal to the minimum number of significant figures in the calculation. The number with minimum number of significant figure is 2.94 thus, minimum number of significant figure is 3, thus, final answer should be rounded off up to three significant figures which is equal to 47.2×10−1.
Interpretation Introduction
(d)
Interpretation:
The number of significant digits in the answer should be determined by evaluating the given expression.
(4.9211)(0.04434)/[(0.000934)(2.892×10−7)]
Concept Introduction:
During addition or subtraction, the final answer should be rounded off for minimum number of digits after the decimal for more accuracy.
Decimal place is the position of digit right to the decimal point.
In division and multiplication, the calculated values are always rounded up to minimum number of significant figures.
Initially the calculation is carry out without considering the significant figures, the rounding off is done after the completion of all the calculations.
Rules for rounding off numbers are as follows:
If the number to be rounded off is followed by digit 5 or greater than 5, the number will be rounded up.
If the number to be rounded off is followed by digit zero or less than 5, the number will be rounded down.
Expert Solution
Answer to Problem 139AP
80.78×107.
Explanation of Solution
The given expression is (4.9211)(0.04434)/[(0.000934)(2.892×10−7)]. By calculating it we get, 80.78164899997334×107
In multiplication and division, the number of significant figures in final answer should be equal to the minimum number of significant figures in the calculation. The number with minimum number of significant figure is 2.892×10−7 thus, minimum number of significant figure is 4, thus, final answer should be rounded off up to four significant figures which is equal to 80.78×107.
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These are in the wrong boxes. Why does the one on the left have a lower molar mass than the one on the right?
SYNTHESIS REACTIONS. For the following reactions, synthesize the given products from the given reactants.
Multiple reactions/steps will be needed. For the one of the steps (ie reactions) in each synthesis, write out the
mechanism for that reaction and draw an energy diagram showing the correct number of hills and valleys for
that step's mechanism.
CI
b.
a.
Use acetylene (ethyne)
and any alkyl halide as
your starting materials
Br
C.
d.
"OH
OH
III.
OH
Calculate the pH and the pOH of each of the following solutions at 25 °C for which the substances ionize completely:
(a) 0.200 M HCl
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell