To how many significant figures should each answer be rounded? (6.626 x 10-34 J . s) (2.9979 × 10° m/s) equation A: = 4.062185153374 x 10-19 J (unrounded) 4.890 x 10- m After rounding, the answer to equation A should have O 1 significant figure. O 5 significant figures.

A hospital patient has an oral temperture of 40.5 degrees celcius and weighs 155 pounds. He is to recieve a drug, the dosage of which is 1.50mg of drug/kg body mass. The drug is dissolved in water to make a solution that is 25mg of drug per 1 mL of solution. What mass of pure drug shoujld he recieve? What volume of drug solution should he recieve?

Question 15 ( Use Scientific Notation (and only scientific notation!) to find the answer to the following. Write your answer in the from: 2.3x10^3. Use 2 decimal places in your answer. (6.97 x 103) (2.34 × 10−6) + (3.2 × 10−2) A/

A chemistry student needs 5.00 g of acetic acid for an experiment. She has available 250. g of a 15.8% w/w solution of acetic acid in ethanol. Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.  Round your answer to  significant digits.

In the lab, a cube of granite has a mass of 40.9 grams and its temperature rises from 28.7oC to 63.0oC when placed outside in the sun for a period of time. Calculate the amount of heat absorbed by the granite. The specific heat of granite is 0.79 J/goC .  Round your answer to 1 decimal place.    Your Answer:

Volume of Water(mL)=100mL Initial temp of water (C)= 21 C degrees Mass of metal(g)=2.9grams Final temp of water and metal(C)=38 C degrees If the density of water is 1.000g/mL what is the mass of water used and what would be your (q)water calculation?

The lowest temperature recorded in a particular city during the past year was –16.53° C. What was the temperature on the Kelvin scale? 252.62 T = K Incorrect The highest temperature recorded in the same city during the past year was 300.31 K. What was the temperature in degrees Celsius? T = 27.16

A graduated cylinder contains 31.0 mLmL of water. What is the new water level after 35.1 gg of silver metal is submerged in the water?

If 20.0 Cal make an ounce, how many ounces of formula should a baby drink per day if the energy needed per day is 1.50 x 10E3 Cal? Express answer to the correct number of significant figures.

A 1,581,819 g car is traveling 0.823 m/s. Calculate the kinetic energy of the car in J. Do not include units in your answer. Give the answer as a whole number.