CHEMISTRY HIGH SCHOOL

A change of phase never accompanies a. a change in volume b. a change in pressure
c. a change in temperature
d. a change in density
e. a change in structure

Answers

Answer 1
Answer: (b) there will be no change in pressure

Related Questions

What are the efficient things needed for a village ​
SOMEONE HELP ME PLEASEEEE!!!What is the outermost layer of the Earth called?
Nitrogen oxides and sulfur oxides make _____.
The_____is an organelle that can give instructions for acell to reproduce and send directions to organelles to make neededmaterials.
Mg(s) + Cu(NO3)2(aq) → Mg(NO3)2(aq) + Cu(s) what is the oxidizing agent and the reducing agent

Plants perform photosynthesis during the night

only during an eclipse

only when the sun is not out

during the day

Answers

The correct answer is the fourth option. Plants perform photosynthesis during the day. Photosynthesis is the process in plants to make their food. This involves the use carbon dioxide to react with water and make sugar or glucose as the main product and oxygen as a by-product.

What is a chemical substance that cannot be broken down into another chemical substance?A. Element

B. Molecule

C. Matter

D. Compound

Answers

Molecule is a chemical substance that cannot be broken down into another chemical substance.

Answer:

The correct answer is A. An element.

Explanation:

An element is a chemical substance that cannot be broken down into another chemical substance.

Which term best defines a saturated hydrocarbon with single bonds only?a. alkane
b. isomer
c. alkene
d. alkyne

Answers

the answer is A "alkane"

Answer:

\large \boxed{\mathrm{A. \ alkane}}

Explanation:

Alkanes are saturated hydrocarbons with only single bonds of carbon and hydrogen.

What are the products of burning fuel

Answers

water vapour.
carbon dioxide.
carbon monoxide.particles.
sulfur dioxide.

Precipitation _____. occurs equally all over the globe. is the change in state from a gas to a liquid. happens when ice changes into water vapor. exceeds evaporation over land.

Answers

Precipitation exceeds evaporation over the land.

Which of the following pairs share the same empirical formula? Select one:
a. CH4 and C2H4
b. PbCl2 and PbCl4
c. N2O5 and NO2
d. C2H6 and C4H12

Answers

Answer: The correct option is d.

Explanation: Empirical formula is a chemical formula which has the simplest ratio of elements present in a chemical compound.

From the given following pairs, the pair which shares the same empirical formula is C_2H_6\text{ and }C_4H_(12)

Empirical formula of C_2H_6 is CH_3 (by dividing the coefficients of C_2H_6 by 3)

Empirical formula of C_4H_(12) is CH_3 (by dividing the coefficients of C_4H_(12) by 3)

Both the chemical formulas have same empirical formula. Hence, the correct option is d.
C2H6 and C4H12 share the same emperical formula of CH3 as the both compounds can be reduced by the smallest subscript in each compound. So C2H6 will be reduced by 2 making CH3 and C4H12 can be reduced by 4 making CH3
Other Questions
Several substances are labeled on the pH scale below.A p H scale is shown ranging from 0 the top to 14 at the bottom. The approximate locations of substances are: gastric fluid, 1.2; lemon juice, 2.2; milk, 6.5; blood, 7.5; seawater, 8; milk of magnesia, upper M g (upper O upper H) subscript 2 solution, 10.5; household lye, upper N a upper O upper H solution, 13.5.Which substance has the lowest [H+] concentration but is still considered an acid?
What is the difference between gram positive and gram negative?
A piece of wood and a piece of steel are at the same temperature; however, the steel feels hotter. This is because the steel has _____. A- more entropy B- greater thermal conductivity C- greater thermal insulation D- a higher R-value
The process by which complex compounds are broken down by enzymes and by which many organic alcohols are formed is called fermentation. a. Trueb. False