There us no sound in the vacuum of space Why?

Answer all that are correct

A) sound must travel through something that vibrates

B) there is no energy in space

C) there is no air to vibrate in the human eardrum

If you are studying cells and heredity, you are most likely taking a chemistry class. a. True b. False

If you need to do a 1:20 dilution on a culture to get acceptable plate counts, how many milliliters of original sample will you add to a final volume of 0.1 mL? For this course, a 1:20 dilution is 1 part culture to a final volume of 20 parts.

Magnesium is a light metal with a density of 1.74 g/cm3. What volume is occupied by 1.35 kg of magnesium?

You buy a balloon at the grocery store and walk outside into - 10F temperatures. what happens to the balloon? the balloons temp increses the vol increases the vol decreases the vol stays the same

Suppose we have a solution of lead nitrate, pb (no3) 2 (aq). a solution of nacl (aq) is added slowly until no further precipitation occurs. the precipitate is collected by filtration, dried, and weighed. a total of 17.

Why does one Oxygen atom bond with two Hydrogen atoms to form water? Why don't they bond in a different ratio?

A fossilized bone contains about 65% of its original carbon-14. to the nearest hundred years, how old is the bone

Calculate the mass of 1.25 moles of Al2 (SO4) 3

which of Nature's erosions message do you think wears down a mountain or part 2 faster when water or ice why

We dissolve 5.00 grams of sugar, C12H22O11, in water to make 1.000 L of solution. What is the concentration of this solution expressed as a molarity?