(a) Interpretation: If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 0.08331 should be determined. Concept Introduction: Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10. For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
(a) Interpretation: If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 0.08331 should be determined. Concept Introduction: Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10. For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
Solution Summary: The author explains that scientific notation is written in such a way that large numbers in small decimal form are multiplied by the power of 10.
If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 0.08331 should be determined.
Concept Introduction:
Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10.
For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
Interpretation Introduction
(b)
Interpretation:
If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 2.8 should be determined.
Concept Introduction:
Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10.
For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
Interpretation Introduction
(c)
Interpretation:
If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 0.0491 should be determined.
Concept Introduction:
Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10.
For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
Interpretation Introduction
(d)
Interpretation:
If the power of 10 is positive, negative or zero exponents in the standard scientific notation of 70, 892, 000 should be determined.
Concept Introduction:
Scientific notation for a number is written in such a way that large numbers are written in small decimal form which is then multiplied by the power of 10.
For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent.
CH₂-COOH
Citric acid has the formula HO-C-COOH
I
CH₂-COOH
CH2–CDD - Na*
+
HD-C-CDD- Na
CH₂-COO-
COO-Na
A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was
diluted to 250 mL in a graduated volumetric flask.
A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution
using phenolphthalein indicator for the titration end-point.
A) 0.0075
Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution.
B) 0.576
D
and is tribasic acid, forming the tri-sodium salt
on complete neutralisation with sodium hydroxide.
1.44
0.00225
1.
(answer the questions in the tan boxes in the tables below each question)
A student conducted an investigation to determine the effect of water temperature on
the amount of sugar that dissolves in a beaker of water. Identify components for trial 1
of this investigation.
Beaker
Number
1
2
3
4
Amount of
Water (mL)
100
100
100
100
Amount of Water (mL)
Trial 1
Temperature of Temperature of Amount of Sugar
Sugar (°C) Water (°C)
Dissolved (g)
20
20
20
20
Temperature of Sugar
5
10
15
20
185
189
194
204
Temperature of Water
Terms
Variable
Constant
Amount of Sugar Dissolved
Be sure to answer all parts. Enter your answer in scientific notation.
Carry out the following calculation, paying special attention to significant figures, rounding, and units
(J-joule, the SI unit of energy; mol = mole, the SI unit for amount of substance):
(6.022 x 1023 atoms/mol) (4.68 x 10-18
J/atom)(1-2-3-2)=[25.051
Note that the numbers 1 and 3 in the last term are exact.
x 10
J/mol