One light-hour is the distance that light travels in an hour. how far is this, in kilometers? (recall that the speed of light is 300,000 km/s)

How will the addition of water affect the acidity of a highly acidic solution having pH 2?. A) There will be a slight decrease in the pH value. B) There will be a slight increase in the pH value. C) The pH value will remain constant.

Wich body system makes the energy in food usable for the body to carry out its activities

A driver realizes that she is traveling in the wrong direction on a one-way street. She has already driven 3.5 meters at a velocity of 16 meters per second, cast before deciding to make a U-turn.

If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? If there is 0.2 M glucose along with 0.15 M NaCl in solution, what is the osmolarity of this solution? 1. 500 mOsm 2. 2.15 Osm 3. 350 mOsm 4. 2.

A certain ore is 33.0% nickel by mass. How many kilograms of this ore would you need to dig up to have 25.0 g of nickel?

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.