A mixture consists of sand, salt, and iron filings. Which of the following instruments or materials would NOT be useful in separating this mixture?

a. magnet

b. filter paper

c. screen

d. water

How long does it take for plastic bags to decompose?

if you double the volume of your simple of chalk, what would happen to the density this is science

In the experiment the hydrogen gas is collected in a eudiometer tube over water. If the barometric pressure and the temperature at the time of the experiment are 752.3 mm Hg and 21.6°C, respectively, and the vapor pressure of water at 21.6°C is 19.

When North America tilts toward the sun, what season is it?

What is the hydronium concentration of a solution with a pH of 3.60

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.

When solid lead (II) sulfide ore burns in oxygen gas, the products are solid lead (II) oxide and sulfur dioxide gas.? A. write the balanced equation B. how many grams of oxygen are required to react with 29.9 grams of lead II sulfide? C.

What are some differences between insect larvae and worms?

Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times Celsius.

What type of overall charge, if any, does the balloon in Diagram B have? Explain how you determined your answer.