Lab Measurements data and questions 1411

1. A thermometer is taken from an inside room to the outside, the air temperature is 5°F . After 1 minute, the thermometer reads 55°F , after 5 minutes the reading is 30°F. What is the initial temperature at the room?

For the image attached Make a x and y axes graph of the average mass vs. year.

I am not sure what is being asked for in question #2.

Just number 42.

Calculate density of a metal an unknown metal

A. Rounding Off A.1 Rounding A student rounded off the following calculator displays to three significant figures. Indicate if the rounded number is correct. If it is incorrect, round off the display value properly. Calculator Student's Correct (yes/no). Corrected (if needed) Display Rounded Value 24.4704 24.5 143.63212 144 532 800 530 0.00858345 0.009 8. 8.00 17

Use calculator to solve the problems. Write your answer in the correct scientific notation with the correct number of sig fig. Enter numbers only, no units. Enter scientific notation as (number)E(exponent) for example: enter 2 x 104 as 2E-4 (note there are no spaces) (9.4 x 10° mm) (4.5 x 10° mm) =

Convert 6.75 g/L to lb/in3. Give your answer in scientific notation (e. g. 1.23E4 instead of 12340). 1 lb = 453.59 g Question 8 Convert 0.00 K to °C and °F. Give your answers to the correct number of sig. figs. KC+273.15 °F (9/5)(°C) + 32 T = T = Question 9 °C 1 in 2.54 cm °F Convert 322 °F to °C and K. Give your answers to the correct number of sig. figs. K= °C + 273.15 °C (5/9)(°F-32)

Round off to 2 decimal places. Don't forget the units for your answers. Show your solutions. 1. Carry out each of the following conversions a, 5,250 ft to km b. 6.5 ft to cm 2. On a recent road trip, your average speed was 85 miles per hour. What was your average speed in           a.  m/s? 3. Carry out each of the following conversions a. 450 μg/mL to mg/mL b. 0.15 g/L  to mg/mL 4. A patient has been prescribed 0.100 mg of a drug that is available in 25-μg tablets. How many tablets are needed? 5. How many milliliters of Children’s Motrin (100 mg of ibuprofen per 5 mL) is needed to give a child a dose of 160 mg? 6. When the human body is exposed to extreme cold, hypothermia can result and the body’s temperature can drop to 28.5 °C. Convert this temperature to °F and K. 7. Calculate the volume in milliliters of 150 g of coconut oil, which has a density of 0.95 g/mL. How many liters does this correspond to?

Use the data set below to answer the following question. This is a fictitious data set, so no units are listed. Data Set 282 294 270 276 232 295 For the data set above, the Q-test suspect value is type your answer. and based on the statistics you can choose your answer. that value with 90% confidence.

A jet airplane reaches 661. km/h on a certain flight. How long does it take to cover 416. m? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols. time 10

For each trial (data in Tables 3 – 5) graph the volume of water displaced (in mL) on the x-axis versus the time in seconds on the y-axis Use the graphing to determine the equation of the best-fit line for your data. Use the equation of the line to determine the slope and reciprocal of the slope for each trial.

* Question Completion Status: QUESTION 3 A If 20.0 Cal make an ounce, how many ounces of formula should a baby drink per day if the energy need per day is 1.50 x 10³ Cal? Express answer to the correct number of significant figures. 75.0 x 10E3 ebapps~2Fblackboard~2Fcontent~2Flist Content.jsp%3Fcourse_id%3D_514... QUESTION 4 A 9.86 g sample of iron metal was heated in water to 85°C. Then, it was dropped into a beaker containing 240.0 g of H₂O at 28.5°C. Assuming that the water gained all the heat lost by the iron, what is the final temperature of the H₂O and Fe? If 756 cal of heat were added to 64.8 g of Al at 32.5 °C, what is the final temperature of the aluminum? 10

(number 15, for the second picture)

Express your answers in scientific notation with the correct number of significant figures. Pay attention to the units and remember how to do conversions. One peanut M&M weighs approximately 2.33 g. A.  How many peanut M&Ms are there in 53.768 kg of M&M’s? B.  What is the weight of 43 peanut M&Ms in milligrams?

2.  Volumetric pipet is used to measure small amounts of liquid very accurately; draw in or suck the liquid using an aspirator (never use your mouth). True or False   3. Which of the following statements about density is incorrect? *   a. The intensive property density can be calculated from the two extensive properties: mass and volume. b. The densities of liquids are usually expressed in units of g/mL (or g/cm^3). c. Densities of gases change greatly with changes in temperature and pressure. d. If oil and water are placed in a container, they form two layers with oil as the top layer because it has the greater density.

I don't know how to do this. Please help.

help me find the Total Mass of Water with Density of Water (g/mL)  and Average Density.

For the image attached Make a graph of the average mass vs year. Please label y and x axes

Round off to 2 decimal places. Don't forget the units for your answers. Show your solutions. 1. Carry out each of the following conversions a. 5,250 ft to km b. 6.5 ft to cm 2. On a recent road trip, your average speed was 85 miles per hour. What was your average speed in           a.  m/s? 3. Carry out each of the following conversions  a. 450 μgμg / mL to mgmLmgmL b. 0.15 g/L  to mg/mL 4. A patient has been prescribed 0.100 mg of a drug that is available in 25-μg tablets. How many tablets are needed?  5. How many milliliters of Children’s Motrin (100 mg of ibuprofen per 5 mL) is needed to give a child a dose of 160 mg?  6. When the human body is exposed to extreme cold, hypothermia can result and the body’s temperature can drop to 28.5 °C. Convert this temperature to °F and K. 7. Calculate the volume in milliliters of 150 g of coconut oil, which has a density of 0.95 g/mL. How many liters does this correspond to?

QUESTIONS REFER to your notes to answer Questions below: 1. Convert 25.0 °C (Room Temperature) in Celsius to: • Fahrenheit • Kelvin . Make sure you report to proper number sig figs using multiple operations rules. 2. Which temperature scale do we use in the laboratory? 3. Why do not use the degree (o) mark on the unit kelvin (K)? 4. Explain why you would be dead at 100 kelvin (K). Refer to figure above.

General Chemistry Laboratory I Lab 1 Significant Figures and Dimensional Analysis Student name PRE-LABORATORY QUESTIONS 1. How many significant figures are in each measurement? (1) 0.0044500 m (2) 5.003 km (4) 1.00 x 10³ s (5) 0.002 mm 2. Define accuracy and precision. 3. Convert 1.567 kilometers to centimeters.ccurate d 4. Convert 3.70 milligrams to kilograms. O Date: Page 1 IN-LABORATORY WORKSHEET 1. Give the number of significant figures in each of the following numbers. (1) 1,278.50 (2) 120,000 (4) 0.0053567 (5) 670 (7) 8.002 (8) 823.012 (10) 2.60 (Prepared by W. Song) (3) 10 dm (6) 10,000 m (3) 90,027.00 (6) 0.00730 (9) 0005789

Show all  computations  and  express final answer in  sig  fig  and  scientific  notation.  Box  out  final answer. Convert1) 3.25 X10^5 ft/ s^2 to m / hour^2

Please help

1. Which is higher: 85.7 °F or 28.9 °C ? 2. The boiling point of a liquid is calculated to be 325 K. What is this temperature on the Celsius and Fahrenheit scales?  3. The melting point of an unknown solid is determined to be 33.0°C. What is this temperature on the Fahrenheit and Kelvin scales?

A. The Internal System of Units Fill in the space provided with the correct SI units and symbol for each quantity. Quantity Unit Symbol Length Mass Time Electric current Temperature Amount of substance Luminous intensity B. The Metric System Convert the following figures to its desired units. Do not round off your answers. 1. 23 m to 2. 76 L to 3. 93.2 mg to 4. 83.34 dL to 5. 94.1 Dm to 6. 12 cm to 7. 164,000 ml to 8. 454 g to 9. 1,232 kg to 10. 672 L to km DL Hg mm mg m kL

Can you help me answer this questions 4 and 5, this is from the previous question I just split my question, thanks

A cooking recipe lists adding 3.0 qt of water as a step. How many mL of water is this?

Q1. Which student collected the most accurate data? Q2.Who collected the most precise data?

SECTION-3 : CHEMICAL PROPERTIES V Effervescent tablets bubble when the citric acid and baking soda in them react. V Chemical changes and chemical properties are not the same. Chemical properties of a substance describe which chemical changes will occur and which chemical changes will not occure. V Chemical changes are the process by which substances actually change into new substances. hp 13 0 fó O Scroll m f5 f8 O f9 f10 a f11 2 f12 pau %23 8 8 4 5 7 4 U 5 6 E Y 2 3 G H F.

Rewrite this measurement with a simpler unit, if possible. kg-m S'S 7.7 Note: If you can simplify the unit at all, it may be possible to make more than one simplification. Be sure your final answer uses the simplest possible unit. 0 0 ロ･ロ X 3 00 8

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.