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3 years ago

HELP PLEASE PLEAES PLAESE

Chemistry

2 answers:

mamaluj [8]3 years ago

7 0

Explanation:

Filter the sand and sea salt from water.

Add water and wait for sea salt to dissolve.

Filter sand from salt water.

Heat and evapourate salt water for salt.

Tema [17]3 years ago

7 0

It dissolved the salt dissolved in the water and the sand

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Which evidence supports the claim that matter can bend light waves?

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Answer:d

Explanation:I’m not 100% sure how to explain it but I’m almost for sure it’s d.

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Explain how an atom is composed of charged particles yet can have an overall charge of zero.

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3 years ago

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A cell with normal tonicity is placed in a 200 mm nacl solution. This solution is ________ and the cell will ________.

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The concentration of a cell is generally 0.15 M (0.9 % NaCl)

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4 years ago

When the concentration of a reactant is increased, the

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Answer:

When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases.

Explanation:

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3 years ago

Identitfy the types of reaction:

Vera_Pavlovna [14]

Answer:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

AgCl + HNO3 = AgNO3 + HC - Double replacement reaction

N2 + H2 = NH3 - Combination reaction

MgCO3 = MgO + CO2 - Decomposition reaction

Explanation:

Single replacement reaction - The type of reaction in which one strong ion replaces the weak ion from the solution.

For example: C2H5OH + Na = C2H5ONa + H2

Double replacement reaction - The reaction in which two compounds in a solution reacts by interchanging their ions and forms a new product.

For example: AgCl + HNO3 = AgNO3 + HCl

Combination reaction - The type of reaction in which two or more compounds combine together to form a single compound.

For example: N2 + H2 = NH3

Decomposition reaction - The type of reaction in which only one compounds break down into two or more new compounds.

For example: MgCO3 = MgO + CO2

Hence, the correct answer is:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

AgCl + HNO3 = AgNO3 + HC - Double replacement reaction

N2 + H2 = NH3 - Combination reaction

MgCO3 = MgO + CO2 - Decomposition reaction

7 0

4 years ago