Explain why a model of the atom is crucial to understanding chemistry and in explaining the behavior of matter. Use 3 - 4 sentences in your explanation.

Answers

Answer 1

Answer: The model of the atom is crucial because without it we wouldn't know how the protons, neutrons, and electrons are connected. Essentially, the protons and neutrons are seen with their bonds while electrons are rotating waves of energy that go around the atom. This model helps us differentiate different elements and isotopes based on the number of components and the way they are connected.

Answer 2

Answer:

Understanding the model of the atom helps predict how elements will react with each other.

For example, the ball-and-stick model is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them.

The atoms are represented by spheres, connected by rods which represent the bonds.

Every ball represent one atom in one molecule and they have different colors for different atoms (for example, carbon is black, hydrogen is white, nitrogen is blue).

There also other models: skeletal models, polyhedral models, composite models, computer-based models.

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A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of gas Y?

Answers

The answer is 1.6 atm. Let's first calculate the mole fraction of gas Y. The mole fraction (x) is: x = n1/n, where n1 is a number of moles of an individual gas in a mixture and n is total moles of the gas mixture. We know that n1 of gas Y is 6.0 mol (n1 = 6.0 mol) and that there are in total 8. mol of the gas mixture (n = 2.0 + 6.0 = 8.0 mol). Now calculate the mole fraction of gas Y. x = 6.0/8.0 = 0.75. Now, let's use the mole fraction of gas Y (x) and the total pressure (P) to calculate the partial pressure of gas Y (P1): x = P1/P. P1 = x * P. If x = 0.75 and P = 2.1 atm, then the partial pressure of gas Y is: P1 = 0.75 * 2.1 atm = 1.6 atm.

yes, this would be 1.6 atm

The results of an investigation are the
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Answers

Answer: ending results

Explanation:

Final answer:

The results of an investigation are the observations and data collected during an experiment or research, which may be qualitative or quantitative. For example, the results of a plant growth experiment could include measurements and descriptions of the plants under different light conditions.

Explanation:

The results of an investigation are the findings obtained from carrying out an experiment or research. An investigation seeks to answer a question, test a hypothesis, or solve a problem. The results constitute the data collected and analyzed, which may be quantitative (numerical) or qualitative (descriptive) in nature. For example, if you conduct an investigation to determine the effect of light on plant growth, your results might include measurements of plant height, color intensity, and a description of leaves condition at different light exposures.

Learn more about Investigation Results here:

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What type of bond is this combination most likely to form?

Answers

Sodium is a group 1 element with atomic number 1. It has 11 electrons. It is soft reactive metal. It has 1 valence electron.

Fluorine is a group 7 element, a hologen with 7 valence electron. It is a most reactive non metal.

When sodium react with fluorine, ionic bond is formed in the resulting compound sodium fluoride.

One sodium and fluorine each totaling 2 atoms are enough to make the bond.

As the bond is formed, both atoms have octet structure. That is they each have 8 electrons on their outermost shells.

The positive charge on sodium indicates that sodium had lost 1 electron to fluorine atom.

The negative charge on fluorine ion indicates that fluorine atom had gained 1 electron from sodium atom to form negative ion.

The name of the compound is sodium fluoride with formula NaF.

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A box experiences a force of 2 N to the left and 3 N to the right. Which is true of the box's motion?A) The box will slow down.
B) The box's velocity will be 1 m/s.
C) The box's velocity will not change.
D) The box will experience acceleration.

Answers

Answer: Option (D) is the correct answer.

Explanation:

The rate of change in velocity over change in time is defined as acceleration.

Mathematically, Acceleration = $(\Delta v)/(\Delta t)$

where $\Delta v$ = change in velocity

$\Delta t$ = change in time

Therefore, when a force of 2 N to the left and 3 N to the right then box will experience acceleration as velocity is also changing with time.

Thus, we can conclude that a box experiences a force of 2 N to the left and 3 N to the right then it is true that the box will experience acceleration.

Answer choice would be D, answer choice B, is the boxes net force. Velocity = distance/time. The correct answer is D. I hope this helps!

What is a physical change

Answers

A change that one can see with the eye. Such as a new hairstyle or a growth over the years.

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Explanation:

↓↓↓↓↓↓↓↓↓↓↓

Physical Change is a substance it does not change. Arrangement of molecules changes.

Solid
Liquid
Gas

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What is the maximum number of covalent bonds a carbon atom can form with other atoms?A. 1
B. 2
C. 4
D. 6

Answers

(C.) Each carbon atom in ethane forms 4

There is no such thing called a 'hexa-bond', as there is a quad-bond and a triple bond and so on...

A carbon atom cannot form a 6 covalent bond with another atom, the max is 4.

Answer: 4

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