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antiseptic1488 [7]
3 years ago
7

Hey! need help filling in this chart ASAP, thanks

Chemistry
1 answer:
goldenfox [79]3 years ago
3 0

Answer:

Be: Helium--------Loses-------4--------Be2+

B: Helium--------Loses--------5--------B5

N: Helium--------Gain---------7--------N3−

O: Lithium---------Gain--------8-------O2−

F: Neon--------electrically neutral-------9---------F-

Explanation:

Hope this helps:)

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Pure elemental gases like oxygen and nitrogen have extremely low melting values of about -220 degrees Celsius because pure gases are nonpolar and only covalently linked. The intensity of intermolecular interactions between molecules determines a substance's melting point.

Which gases make up the elements?

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3 0
2 years ago
A rectangular block has the following dimensions: 3.21 dm, 5.83 cm, and 1.84 in. The block has a mass of 1.94 kg. What is the de
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The density of the rectangular block in g/mL is 7.0.

<u>Given the following data:</u>

  • Mass of block = 22.8 gra1.94 kg
  • Length of block = 3.21 cm
  • Width of block = 5.83 cm
  • Height of block = 1.84 in.

To find the density of the block in g/mL:

First of all, we would determine the volume of the rectangular block by using the following formula:

Volume = length × width × height

<u>Conversion:</u>

1 in = 2.54 cm​

5.83 in = X cm

Cross-multiplying, we have:

X = 2.54(5.83)\\\\X = 14.81 \; cm

Volume = 3.21 × 5.83 × 14.81

Volume = 277.16 cubic centimeters.

<u>Note</u>: Milliliter (mL) is the same as cubic centimeters.

1000 grams = 1 kg

Y grams = 1.94 kg

Cross-multiplying, we have:

Y = 1940 grams

Now, we can find the density:

Density = \frac{Mass}{Volume}\\\\Density = \frac{1940}{277.16}

<em>Density </em><em>= 7</em><em>.0 g/mL</em>

Therefore, the density of the rectangular block in g/mL is 7.0.

Read more: brainly.com/question/18320053

4 0
3 years ago
To determine the molarity of naoh solution, student took 3.5 g of khp (khp – potassium hydrogen phthalate; molar mass = 204.22 g
alexandr402 [8]
Hello!

First, we need to determine the concentration of KHP. This concentration is:

\frac{3,5g KHP }{50 mL sol}* \frac{1000 mL}{1 L}* \frac{1 mol KHP}{204,22 g KHP}=0,343 M

The neutralization reaction is:

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At the equivalence point:

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What does this graph show about the acceleration of the moving object?
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Answer:

the accleration is decreasing

Explanation:

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