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4 years ago

You are writing a safety contract for your class. List 10 things you would include in the contract?

Chemistry

1 answer:

maria [59]4 years ago

8 0

Answer:

1.always listen to teacher

2 no eating in class

3 always have attentive listening

4 always have proper safety material

5 wear eyeglasses when needed

6 let others be able to listen

sorry I could only think of 6

Explanation:

I just have six for you sorry...

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Which one of these statements about cell division is not accurate?

Masja [62]

The answer is b damaged tissue can not be repaired

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4 years ago

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Can you define what chemestry is? (Maybe in a easy way)

Mamont248 [21]

Answer:

Explanation:

Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.

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3 years ago

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Elements are organized into groups / families according to their physical and chemical properties. Identify the elements that's

Kryger [21]

Answer:

1 valence - Alkali Metals: Li Lithium, Na Sodium, K Potassium

2 valence - Alkaline Earth Metals: Be Beryllium, Mg Magnesium, Ca Calcium

3 valence - Non-metals: B Boron, Al Aluminium

4 valence - Non-metals: C Carbon, Si Silicon

5 valence - Non-metals: N Nitrogen, P Phosphorus

6 valence - Non-metals: O Oxygen, S Sulfur, Se Selenium

7 valence - Halogens: F Fluorine, Cl Chlorine, Br Bromine

8 valence - Noble Gases: He Helium, Ne Neon, Ar Argon

3 0

4 years ago

What is the Volume of the salt solution?

hammer [34]

<h3>Answer:</h3>

61.3 mL

<h3>Explanation:</h3>

From the data given;

Mass of volumetric flask is 109.1 g
Mass of salt is 5.01 g
Mass of Volumetric flask and salt is 113.5 g
Mass of volumetric flask and salt solution is 170.4 g
Mass of salt solution is 61.3 g

We are required to calculate the volume of salt solution;

We need to know the relationship between density, mass and volume of a solution.

Density = Mass ÷ Volume

Therefore, given mass and density we can find the volume.

Rearranging the formula;

Volume = Mass ÷ density

Assuming the density of salt solution is 1 g/mL

Then;

Volume = Mass of the salt solution ÷ density of the salt solution

= 61.3 g ÷ 1 g/mL

= 61.3 mL

Therefore, the volume of the salt solution is 61.3 mL

3 0

3 years ago

Why does sodium have a lower melting point then magnesium

Lady bird [3.3K]

Answer:

Number of delocalized electrons

Explanation:

Magnesium has more delocalized electrons compared to sodium and this accounts for the higher melting point.

When magnesium atoms comes together to form a metallic bonds, they have more network of delocalized electrons.
There is more pull for the localized electrons due to the nuclear charge on the nucleus.
This strong intermolecular metallic bond increases the melting point of magnesium.

3 0

3 years ago