It's important to remember that elements are

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Answer 1

Answer:

No, unless you're doing some sort of course where they demand that you do. It's useful to remember the general features of the periodic table (what each block is, where they are in relation to each other, roughly where the most common elements are), but memorizing the entire thing would simply be a mnemonic exercise

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Answer 2

Answer:

Answer:

i used a vent to vented

Explanation:

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Maki uses 20 gallons of a solution with an unknown ethanol concentration and 60 gallons of a 12% ethanol solution to make 80 gallons of a 10% solution. What is the value of x, the concentration of the unknown ethanol solution?. a. 0.02. b. 0.04. c. 0.05. d. 0.08
Calculate the value of ?E in joules for a system that loses 115 J of heat and has 150 J of work performed on it by the surroundings.
Based on intermolecular forces, which of these substances would have the highest boiling point?(1) He (3) CH4(2) O2 (4) NH3
When scientists use one of their five senses to gather information, they are A. making an observation. B. making an inference. C. predicting a relationship D. drawing a conclusion.

When light waves hit ice, most of them bounce off and radiate back into space. Because of this, ice is best described as which kind of surface? reflective absorbent dense rough

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The bouncing back of light waves observed when light waves hit ice and most of them bounce off and radiate back into space is called reflection.

What are light waves?

Light waves are a form of waves which produces visible sensitization of the eyes

Light waves have properties of waves such as:

reflection
refraction
diffraction
interference, etc.

When light waves hit ice, most of them bounce off and radiate back into space.

This property of light waves is known as reflection.

Learn more about reflection of light waves at: brainly.com/question/1191238

When light waves hit ice, most of them bounce off and radiate back into space, hence, ice is best described as a reflective surface.

What is a Reflective surface?

A reflective surface is one which can cause incident light to bounce back (reflection).

According to this question, when light waves hit ice, most of them bounce off and radiate back into space. This means that most of the incident lightreflects off the ice surface.

Therefore, the ice surface is best described as a reflective surface.

Learn more about reflection at: brainly.com/question/8553652

The Earth's systems are all interdependent, which means that A. each system has no influence on the other systems. B. one system can overpower the other systems, causing damage to the Earth. C. each system works by itself to benefit the Earth. D. each system is unique, yet each interacts with the others.

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The answer to the question is D. each system is unique, yet each interacts with the others. In an interdependent system, each part of the system works in its own way but interacts with the others. When combined together, all the different systems produce individual benefits but interact with one another to produce a huge benefit for the planet Earth.

What was John Dalton's contribution to the development of the atomic theory?A
Dalton recognized that tiny atoms combined to form complex structures.

B
Dalton recognized the presence of electrons around a nucleus.

C
Dalton recognized the presence of protons in the nucleus.

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Answer:

A. Dalton recognized that tiny atoms combined to form complex structures.

Which atomic model was proposed as a result of J. J. Thomson’s work?

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J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. He then proposed the Plum Pudding Model.

The atomic model was proposed as a result of J. J. Thomson’s work was the plum pudding model.

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What is the nuclear equation for the alpha decay of 173 Yb?

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Yb 173 turns into Er 169 after alpha decay. you can find that by knowing an alpha particle is basically a helium nucleus with 2 protons and 2 neutrons. That means that Yt 173 loses 2 protons and 2 neutrons when undergoing alpha decay.

Any reaction that absorbs 150 kcal of energy can be classified asa. activated.
b. exothermic.
c. oxidation.
d. endothermic

Answers

The answer should be (D) endothermic reaction.

Reason : - Reactions in which energy is absorbed are called endothermic reactions. In your provided question, 150 kcal energy is being absorbed, and thus, we can say that it is an endothermic reaction.

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What unit is used to measure weighted average atomic mass?a. amub. gramc. angstromd. nanogram

The abbreviation that represents a volume unit isa. cm3.b. mg.c. mm.d. cm.

PLEASE HELPSusana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after the heating. Is the sample of red crystals an element or a compound? Explain your answer.