Count the significant digits in each of these measurements: measurement 0.003600 J number of significant digits -2 - 8.0 x 10 kJ/mol 51800. kg 9.9 x 10 -1 mL G

Q5: 1.44 grams of a sample of marble (impure calcium carbonate) dissolved in 40 ml of 1.0 normality (N) of hydrochloric acid, then add an amount of distilled water to the resulting solution, and its volume became 100 ml, it was found that 25 ml of this resulting solution (mixture) needs 19 ml of 0.2 normality (N) NaOH solution. Calculate the normality (mole/L) of the mixture solution and then calculate the percentage of pure calcium carbonate in this sample. If you know that the molecular weight of pure calcium carbonate is 106 g/mol. *

How do I include units into my slope intercept Units - g mL 1. Y=1.2534x+0.0250 Answer- Y=1.2534x ( mL ) + 0.0250 (g) 2. Y = 0.997x + 0.0585 Answers y=0.997x(mL) + 0.0585 (g)

1. It is known that the boiling point of water on the Kelvin temperature scale is 373.15 K and the freezing temperature of water is 273.15 K. A temperature scale, called the Reaumur (R) scale, is defined by identifying the freezing point of water as 0.0°R and the boiling point of water as 80.0°R. What is 62.3°R on the Kelvin scale? Clearly define your variables.

To how many significant figures should each answer be rounded? (6.626x 10-34 J . s) (2.9979x 10% m/s) equation A: = 4.483992189616 x 10-19 J (unrounded) 4.430 x 10-7 m After rounding, the answer to equation A should have O 1 significant figure. O 4 significant figures. O 2 significant figures. O 3 significant figures. O 5 significant figures. (6.022x 1023 atoms/mol) (0.653 g) 20.18 g/mol = 1.949 x 1022 atoms (unrounded) equation B: After rounding, the answer to equation B should have

All of the following metric multiplies and their values are correct EXCEPT: Kilo; 1 x 103 Micro; 1 x 10-6 Milli; 1 x 10-2 Deci; 1 x 10-1

A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. (-1.7) =). 0 mmol. °C = ? kJ mol. °C x10 X 3 010 5

Length is measured with a metric ruler. Part ofa combined metric and inch ruler is shown in Figure B. On the metric side of the ruler the distance between numbered Hines is equal to one centimeler. Bach centimeter is divided into 10 equal parts. Each one of these parts is equal to one millimeter. The figure below shows a combined metric and inch ruler. 12 ENCHES Figure B 1. What value does the prefix milli- stand for? 2. What value does the prefix centi- stand for? 3. Which is larger, a meter or a millimeter? 4. How many millimeters make 1 centimeter? 5. The length at A may be written as 45 mm. It may also be written as 5 cm, 45 cm, 4.5 mm 6. The length at B may be written as mm or cm. Measure each of the following lengths. Write the lengths on the right in centimeters and millimeters. 7. 7. mm 8. 8. cm mm 9. 9. cm mm 10. 10. mm To the right of each length listed, draw a line of that length. a) 92 mm b) 9.2 cm ) 43 mm d) 3.5 cm

Done < AA www-awu.aleks.com MEASUREMENT Multiplication and division of... Decide whether each proposed multiplication or division of measurements is possible. If it is possible, v last column of the table. proposed multiplication or division Is this possible? result x10 (2.0 mg) - (0.020 g) = ? yes ola no Ar yes (4.0 g) · (6.0 mL) = ? no yes (2.4 em) · (0.30 m) = ? %3D no Explanation Check © 2021 McGraw-Hill Education. All Rights Reserved.

Washington, D.C. has an average January temperature of 34.9 degrees Fahrenheit. What is this average if temp is expressed in Celsius? (Round to two decimal places.) [Hint: Conversion between Fahrenheit and Celsius is a linear transformation: Fahrenheit = Celsius*1.80 + 32, or Celsius = Fahrenheit*(1/1.80) - (32/1.80)]