CHEMISTRY HIGH SCHOOL

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Which statements accurately describe volume? Check all that apply.

Answers

Answer 1

Answer:

Answer:

Volume is a physical property of an object

One unit of volume is the milliliter

Liquids and solids have constant volumes

Explanation:

Answer 2

Answer:

Explanation:

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Compute 3.5×4.48697. Round the answer appropriately. Express your answer numerically using the proper number of significant figures.
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What is ductiliy in a solid

Answers

The property by which it can be converted into nuts and bolts

Which element has atoms that can bond with each other to form long chains or rings?(1) carbon (3) oxygen
(2) nitrogen (4) fluorine

Answers

The correct answer is option 1. It is the carbon (C) atom that can bond with each other to form ring and chain structures in compounds. These ring and chain structures and compounds are called organic compounds. Chain structures include alkanes, alkenes, alkynes. Ring structures include cyclic hydrocarbons and aromatic hydrocarbons.

Answer: Option (1) is the correct answer.

Explanation:

Carbon atoms are able to combine with its atoms resulting in formation of long chains. This property of carbon is known as catenation. Whereas carbon atom also has the property to combine with other atoms and results in the formation of long chains or rings.

On the other hand, oxygen, nitrogen, and fluorine does not form long chains or rings.

Thus, we can conclude that carbon is the element whose atoms can bond with each other to form long chains or rings.

In Rutherford’s gold foil experiment, many of the alpha particles passed straight through the gold foil, completely undeflected. What did Rutherford conclude from this observation? A. Alpha particles have a positive charge.

B. Electrons have a negative charge.

C. An atom is made up of mostly empty space.

D. There is a dense area within an atom that has a negative charge.

Answers

Answer: C

Explanation:

Rutherford's Gold Foil Experiment

These were his conclusions.

Aimed beam of alpha particles at a thin piece of gold foil and found most of the particles passed through the gold foil without being scattered, except for a few particles.
He found the volume of an atom is mostly empty space.
He proposed there is a heavy, positively charged body at the center of each atom that contains most of the mass.
Electrons are throughout the atom.
Number of electrons outside the nucleus equals the number of protons in the nucleus. Atom is electrically neutral.

A 7.0 liter balloon at room temperature contains helium gas. if the temperature is halved, what happen to the volume?

Answers

The volume = 6.71 L

Further explanation

Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

$\tt (V_1)/(T_1)=(V_2)/(T_2)$

V₁=7 L

T₁=25 °C(room temperature) + 273 = 298 K

T₂=12.5(halved) + 273 = 285.5 K

$\tt (V_1)/(T_1)=(V_2)/(T_2)\n\n(7)/(298)=(V_2)/(285.5)\n\nV_2=6.71~L$

Which best describes emerging scientific ideas?

Answers

Answer : Not studied by many scientists.

Explanation : An emerging scientific idea should be something which is not commonly studied by most of the scientists. If it is found to be common with many scientific ideas then it may not be considered as emerging scientific idea. It has to be unique, different and innovative from rest of the ideas.

What are chemical reactions?