a) If log x = (0.2993)(74.29), what is x? (give the answer to the correct number of significant figures)

Q9. I am unsure on how to get the final answer. I believe we have to convert the number to scientific notation but I’m not sure how they got that answer.

I think I did a calculation wrong but I am having trouble understanding significant figures. In this problem, I am calculation the density of water from my previous calculations mass= 7.359g and volume=7.8mL. So I then divided 7.359g by 7.8mL to find density and got (.9434615385) on my calculator which I then turned into (.94) because I believe there should be 2 significant figures. Is (.94) correct or should 1.4 be the final answer?

(282.7×105)−(1.100×103)]×2.8990 Express your answer to the appropriate number of significant digits.

Perform the following mathematical operations, and express the result to the correct number of significant figures.

Consider the following mathematical expression: (2.4 × 10³) (2.24 × (2.54)³) 0.7217 x = X The answer X should be expressed as significant figures.

At sea, distances are measured in nautical miles and speeds are expressed in knots. (1 nautical mile=6076.12 ft) (1 knot= 1 nautical mi/h) How many miles are in one nautical mile?

x 100 (100 is exact) e. 9.875 x 102 5. a) At what temperature is the temperature in degrees Fahrenheit equal to twice the temperature in degrees Celsius? b) The average daytime temperatures on earth and Jupiter are 72 °F and 313 K, respectively. Calculate the difference in temperature, in C. between these two planets. 6. For a material to float on the surface of the water, the material must have a density less than that of water (1.0 g/mL) and must not react with the water or dissolve in it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will this ball float or sink when placed in water? (Note: Volume of a sphere r .) 7. a)Using examples, explain the difference between a physical property and a chemical property. b) Do the following statements describe chemical or physical properties? (i) Oxygen gas supports combustion. (ii) Fertilizers help to increase agricultural production. ii) Water boils below 100°C on top of a mountain. (iv) Lead is denser than aluminum. (v) Uranium…

How many significant figures are in each number?(a) 58.31 (b) 0.00250 (c) 2.7 * 103 (d) 1 cm = 0.01 m (e) 0.500 (f) 2100

(a) How many picometers are there in 1 m? (b) Express6.0 * 103 m using a prefix to replace the power of ten.(c) Use exponential notation to express 4.22 mg in grams.(d) Use decimal notation to express 4.22 mg in grams.