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Andreyy89
3 years ago
10

Pure sodium metal explodes when it makes contact with water. In its natural state, chlorine is a deadly, poisonous gas. When the

se two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt. Which of the following statements does this information support? A. The properties of substances change during chemical reactions but then later go back to their original condition. B. Heat must be added in order to change the chemical properties of substances. C. When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances. D. When substances are chemically combined, the properties of the new substances that are formed are the same as the properties of the original substances.
I think it's D but I'm not sure
Chemistry
2 answers:
RideAnS [48]3 years ago
8 0

https://do-work-zone.com/?mref=hello69

marin [14]3 years ago
7 0

Answer:  C. When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances

Explanation: In chemical reactions, the substances combine and undergo rearrangement to form new substances and the new substances formed have different properties than the combing substances.

2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)

In the given chemical reaction, Na in solid state and a reactive metal combines with gaseous and poisonous chlorine but in stable form to give sodium chloride which is salt and is non toxic.

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Organisms are classified into domains and other groups by similar characteristics. There are three domains: Archaea, Bacteria, a
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Answer:

presence or absence of a nucleus

Explanation:

These classification of organisms into broad domains is based on the present or absence of nucleus in the cell of an organism.

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8 0
3 years ago
Enter your answer in the provided box. When mixed, solutions of barium chloride, BaCl2, and potassium chromate, K2CrO4, form a y
ira [324]

Answer:

35.42g

Explanation:

Step 1:

The balanced equation for the reaction

BaCl2(aq) + K2CrO4(aq) → BaCrO4(s) + 2KCl(aq)

Step 2:

Determination of the limiting reactant.

It is important to determine which of the reactant is limiting the reaction as the limiting reactant is used to determine the maximum yield of the reaction. The limiting reactant can be determined as follow:

From the balanced equation above,

1 mole of BaCl2 reacted with 1 mole of K2CrO4.

Therefore, 0.7 mole of BaCl2 will also react with 0.7 mol of K2CrO4.

From the above illustration, we can see that it requires a higher amount of K2CrO4 to react with 0.7 mol of BaCl2. This simply means that K2CrO4 is the limiting reactant.

Step 3:

Determination of the number of mole of BaCrO4 produced from the reaction.

The limiting reactant is used in this case.

From the balanced equation above,

1 mole of K2CrO4 produced 1 mole of BaCrO4.

Therefore, 0.14 mole of K2CrO4 will also produce 0.14 mole of BaCrO4.

Step 4:

Converting 0.14 mole of BaCrO4 to grams.

This is illustrated below:

Molar Mass of BaCrO4 = 137 + 52 + (16x4) = 137 + 52 + 64 = 253g/mol

Number of mole BaCrO4 = 0.14 mole

Mass of BaCrO4 =?

Mass = number of mole x molar Mass

Mass of BaCrO4 = 0.14 x 253

Mass of BaCrO4 = 35.42g

Therefore, 35.42g of BaCrO4 is produced from the reaction.

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I think it’s C atomic radius and numbers of unshielded protons
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What is the difference between a scientist theory and a scientific law
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Answer:

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