Chemistry High School


Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of the Moon. How should he position them to show a New Moon?

Answers

Answer 1
A black ball is probably the best way to show it sense we can’t see a new moon when it’s around

Related Questions

A clownfish uses a sea anemone as a safe place to live. While living there, the clownfish lures in food for the anemone. This is an example of what type of relationship?

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do you possibly have a picture by vhanec?

4) How many atoms are present in a sample of oxygen, O2 with 12.222 moles?

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Answer:

two oxygen atoms

A block of concrete has a mass of 5100 g and a volume of 2500 cm3 . Calculate the density.

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Answer:

2.04 g/cm3

Explanation:

Density = mass ÷ volume

= 5100 ÷ 2500

=2.04 g/cm3

I NEED HELP PLS PLS PLS

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pyrite because it doesn’t sink it floats

Please help I’ll even give you brainliet

What is the molecular formula for a compound that is 34.31% sodium, 17.93% carbon, 47.76% oxygen and has a molar mass of 134.00g?

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Answer: Na2C2O4 probably sodium oxalate

Explanation: assume you have 100 g substance.

Mass of Na is m(Na) = 34.31 g, m(C) = 17.93 g and m(O) = 47.76 g.

Calculate moles n(Na) = 34.31 g/22.99 g/mol= 1.49 mol.

For C n(C) = 1.49 mol and n(O) = 2.985. You divide all by 1.49 you

Get n(Na) : n(C) : n(O) = 1:1:2 M(NaCO2) = 67 g/mol.

Divide 134:67 = 2. You get formula Na2C2O4

which process helps guarantee that a species continues to involve over hundreds of years?

A. growth

B. nutrition

C. reproduction​

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Answer:

C. reproduction​

Explanation:

help :) plz :) ........

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Answer:

D. 4:3

Explanation:

The mole ratio is simply the coefficients in a balanced chemical reaction and their relation to each other. For example, the mole ratio between Al and [tex]Al_{2}O_{3}[/tex] is 2:1, and the ratio between [tex]O_{2}[/tex] and [tex]Al_{2}O_{3}[/tex] is 3:2.

Which statement best describes the polarity of the molecule Sil4?

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Answer:

I dont a picture

Explanation:

but the answer is 24

connect them, dont guess please + 23 points

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Answer:

Astronaut- highly trained individual for space travel

Payload Specialist- partnering scientist, journalist, or political guest.

Space Sickness- nausea, vomiting, and upset stomach.

Muscle Atrophy- the result of microgravity.

Johnson Space Center- training facility for U.S. astronauts.

A mixture of Oxygen and Hydrogen occupies a pressure of 101.3kPa. The pressure of Hydrogen is 56kpa. Calculate the pressure of oxygen.

Answers

Answer:

45.3 KPa

Explanation:

From the question given above, the following data were obtained:

Total pressure (Pₜ) = 101.3 KPa

Pressure of Hydrogen (Pₕ) = 56 KPa

Pressure of Oxygen (Pₒ) =?

The pressure of oxygen in the mixture can be obtained as follow:

Pₜ = Pₕ + Pₒ

101.3 = 56 + Pₒ

Collect like terms

101.3 – 56 = Pₒ

Pₒ = 45.3 KPa

Thus, the pressure of oxygen in the mixture is 45.3 KPa

Find the pH of a solution containing [H+]=0.00003

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Answer:

Acid

Explanation:

because acid has a pH of6_1

PLEASE HELP!!!!!!!! I DO NOT UNDERSTAND

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Answer:

A, B, C

Explanation:

Answer:A, b, c

Explanation

WDYT a mixture is? Please help

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Answer:

A mixture is when two substances are physically combined and can be taken apart.

Explanation:

my words

What is the atomic number of the following element??

Answers

Answer:

91

Explanation:

91 it always says the number in the top left corner
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