Chemistry » Page 21

Chemistry

Guest

What is the oxidation number for CO2

Answer Answers (1)

Chemistry

Adam

Which is a property of acids in aqueous solutions?

Answer Answers (1)

Chemistry

Maritza

On the periodic table, calcium and bromine are located in period 4. What is one difference between the two elements?

A. Calcium atoms are more reactive than bromine atoms.

B. Bromine and calcium atoms will each combine with the same elements to form compounds.

C. Calcium atoms combine more easily with other atoms in Group 2.

D. Bromine atoms have more electrons in their outer shell than calcium atoms.

Answer Answers (1)

Chemistry

Georgia Novak

Who's theory states that atoms are made up of empty space with electrons around a positively charged mass?

Answer Answers (1)

Chemistry

Franco Golden

O3 (g) + NO (g) O2 (g) + NO2 (g) Write the equalibrium expression

Answer Answers (1)

Chemistry

Ezra Khan

You are given 10.00 mL of a solution of an unknown acid. The pH of this solution is exactly 2.36. You determine that the concentration of the unknown acid was 0.3535 M. You also determined that the acid was monoprotic (HA). What is the pKa of your unknown acid? (Leave the unit box empty, as pKa has no unit.)

Answer Answers (1)

Chemistry

Cael Lyons

What mass of copper is consumed in the reaction with hydrochloric acid if 10.0 g of gas is collected?

Answer Answers (1)

Chemistry

Kristian Costa

How does the movement of molecules inside a solid block of iron change as the iron is heated?

The molecules move faster.

The molecules move slower.

The molecules stop moving completely.

The molecules move in the same way at all temperatures.

Answer Answers (1)

Chemistry

Jakob Allison

Read the following passage: The movement of tectonic plates buries a rock deep inside Earth. Intense heat and pressure change the mineral composition of the rock and transform it into Rock A. Rock A melts and comes out to the surface of Earth during a volcanic eruption. The molten rock cools rapidly to form Rock B. Which statement is most likely correct? Rock B may have fossils. Rock A may have shiny, glassy surface. Rock A is composed of layers of sediments. Rock B has a fine grainy texture and small crystals.

Answer Answers (1)

Chemistry

Harper Lang

What is a change which forms one or more new substances?

Answer Answers (1)

Chemistry

Sherlyn Gordon

Which changes occur as a cadmium atom, Cd, becomes a cadmium ion, Cd2+?

(1) The Cd atom gains two electrons and its radius decreases.

(2) The Cd atom gains two electrons and its radius increases.

(3) The Cd atom loses two electrons and its radius decreases.

(4) The Cd atom loses two electrons and its radius increases.

Answer Answers (1)

Chemistry

Nico Leon

Explain Charles law

Answer Answers (1)

Chemistry

Redbull

2 H2 + O2 → 2 H2O What is the product of this chemical reaction

Answer Answers (1)

Chemistry

Lainey Hansen

Which of the following is a chemical property?

A.) Ability to burn

B.) Mass

C.) Density

D.) All of the above

Answer Answers (1)

Chemistry

Joshua Coffey

What is the density of rock if it has a mass of 25 g?

Answer Answers (1)