Write the formula of the following chemical compounds: i. Calcium phosphate ii. Ammonium carbonate

Answers

Answer 1

Answer: i - Ca3(PO4)2
ii- (NH4)2CO3

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Match the following definition to the type of solution it describes. unsaturated solution saturated solution supersaturated solution A. The amount of solute dissolved is less that the maximum amount the solution can hold. B. The amount of solute dissolved is the maximum amount the solution can hold. C. The amount of solute dissolved is more than the usual maximum amount.

1.09 L of a gas at standard temperature and pressure is compressed to 374 ml. what is the new pressure of the gas?

Answers

This can be solved using the equation PV = nRT, but there is an easier way using Boyle's Law. This law states that the product of pressure and volume are constant in a system with constant temperature. This means that we can set the product of initial pressure and volume equal to the final pressure and volume. Maybe you have seen this equation as P1V1 = P2V2. We know that temperature is constant at 0 degrees Celsius (or 273.15 K), and that the initial pressure is standard at 1 atmosphere (atm). This means our knowns are:
P1 = 1 atm V1 = 1.09 L V2 = 0.374 L (from 374 mL)
Plug these into the Boyle's Law equation P1V1 = P2V2:
(1 atm)*(1.09 L) = (P2) * (0.374 L)
(1 atm)*(1.09 L)/(0.374 L) = P2
P2 = 2.91 atm

What is the charge of an electron?A.) Positive one
B.) Positive two
C.) Negative one
D.) Negative two

Answers

The correct answer is C. An electron has a charge of -1 and a smaller mass than a proton. Proton has the same mass with the neutron. The ratio between the mass of a proton and an electron is about 2000. An electron has an equal value but negative charge with the proton.

What volume of a 2.00 M stock solution of NaOH is needed to prepare 150. mL of 0.40 M solution?

Answers

To find the volume ratios we say m1v1=m2v2

where m1 is the initial molarity, m2 the final molarity, v1 the initial volume, v2 the final volume.in this question m1=2.00M, m2=0.40M v2=150ml

Therefore the expression becomes: 2.00M×v1=0.40M×150mL

v1=(0.40M×150mL)/2.00M

=30mL

The Dome of the Rock and Al-Aqsa Mosque are located in what city?Jerusalem
Cairo
Damascus
Baghdad

Answers

They are located in Jerusalem.

Old City of Jerusalem

A biochemist is attempting to replicate a chemical reaction that commonly takes place in cells. During the chemical reaction, starch is broken down into glucose. What will most likely happen if the amount of enzyme that catalyzes this reaction is increased?

A. The reaction will stop.
B. The reaction will slow down.
C. The reaction will speed up.

Answers

C. the reaction will speed up, as the role of a catalyst is to increase the rate of reaction

Food is shipped thousands of miles throughout our country using various types of transportation such as trucks, planes, and boats. Food availability would be most affected by a shortage in which of the following energy sources? Coal Natural gas Petroleum Water power

Answers

The correct answer for this would be the third option: PETROLEUM. So when food is shipped thousands of miles throughout our country using various types of transportation such as trucks, planes, and boats, food availability would be most affected by a shortage of PETROLEUM. Petroleum is the energy that is used to operate trucks, planes and boats. Hope this answers the question.

Answer: Petroleum

Explanation:

Petroleum is a fossil fuel. It is also called as crude oil. It is a yellowish black liquid that can be found beneath the earth crust. It is a highly combustible fuel and generates lot of heat energy necessary for running the vehicle. It is the most commonly used fuel for shipping, and road transportation of goods and services. It helps the vehicles to run for long and covering the large distance.

The food availability would be affected by the shortage in absence of petroleum.

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