A car travels 240 km in 2.0 hrs and a sprinter travels a 100. m in 9.5 s. Which is traveling faster and by how much?

balance the following reaction. a coefficient of "1" is understood. choose option "blank" for the correct answer if the coefficient is "1". ___ Kcl + ___ Pb (NO3) 2 - ->___ Pbl2 + ___ KNO3

The radioisotope radon-222 has a half-life of 3.8 days. How much of a 73.9-gram sample of radon-222 would be left after approximately 23 days?

A patient comes into the hospital because she is worried about possible exposure to radiation. The doctors determine that the patient has 60 rem of exposure. What is her risk of cancer? High because her exposure is less than 100 rem.

What type of energy is carried by electrical charges as they move in a circuit? A. Nuclear energy B. Electrical energy

Which sentence correctly uses commas to separate coordinate adjectives? More than 700,000 books make up the library's large, diverse, rare-book collection. More than 700,000 books make up the library's large, diverse rare-book collection.

What is the volume of 90.0 grams of ether if the density of ether is 0.70 g/mL? a) 1.1 x 10^2 mL b) 1.3 x 10^2 mL c) 6.3 x 10^1 mL d) 7.8 x 10^-3 mL

Which of the following is the general definition of a gas? Matter with a fixed volume and a fixed shape. Matter with no fixed volume and no fixed shape. Matter with a fixed volume but no fixed shape. Matter with a fixed shape but no fixed volume.

If data are from a trusted source and the results are validated by multiple tests, the evidence supporting a scientific claim is

Suppose you are performing an extraction procedure with a carboxylic acid, like a benzoic or toluic acid Which layer should contain the carboxylic acid in a two-layer mixture of water and an organic solvent, like diethyl ether? A.

Which of the following statements is true for a decomposition reaction? A) new atoms are formed B) a single product is formed C) multiple products are formed D) multiple reactants break down