Which type of preservation is made when a mold fills in with sediment, showing the exterior features of an organism?

A. Trace fossil

B. Carbon film

C. Cast

D. Microfossil

At 570. mm Hg and 25°C, a gas sample ne (in mm Hg) at a volume of 1250 mL and a temperature of 175°C and 25°C, a gas sample has a volume of 2270 mL. What is the final pressure

Potassium chlorate decomposes according to the following chemical equation: 2KClO3 - - - > 2KCl + 3O2, If you start with 458 g of KClO3, what mass (g) of O2 will be produced? A. 83.71 L O2 B. 179.39 L O2 C. 687 L O2 D. 67.2 L O2

This system has an equilibrium constant of 0.105 at 472°C: N2 (g) + 3H2 (g) ↔ 2NH3 (g) What is the reaction quotient, Q, for this system when [N2] = 2.00 M, [H2] = 2.00 M, and [NH3] = 1.00 M at 472°C? 0.0625 0.1250 0.2500 0.5000

The graph below shows how solubility changes with temperature. What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of water

Desribe difference between ketones and aldehydes

What can the student predict if she finds the mass of the whole candy bar, including the wrapper?

A hardware salesman measures the mass of a box containing 1000 washers. The mass is 1.1298kg. What is the mass of a single washer in milligrams? Write your answer as a decimal.

according to the law of conservation of, the number of atoms in the products of a chemical and equation must be balanced with the number of atoms in the reactants

whats the specific heat of an unknown substance if the addition of 800 joules of heat energy caused a 30 gram sample to warm from 20 to 40 degrees celsius?

How much energy (in kj) is required to ionize 2.52 moles of hydrogen atoms?