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Natasha2012 [34]
3 years ago
13

Which of the following is a substance: table salt, seawater, or sand? Explain how you know.

Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
6 0
TABLE SALT IS A SUBSTANCE.
In chemistry, a substance refers to a matter which has specific composition and specific properties which do not change. A substance can be an element or a compound. A substance typically has a constant composition, which can not be separated by physical methods.
In the question given above, table salt is an example of a chemical substance because, it has a constant specific composition and its components can not be separated by physical methods. 
Seawater and sand are not substances, because they have varied compositions and their components can be separated by physical methods.
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When the u-235 nucleus is struck with a neutron, the zn-72 and sm-160 nuclei are produced, along with some neutrons. How many ne
Oxana [17]

4 neutrons that are produced along with the Zn and sm. The complete final equation is:  ²³⁵U + ¹n → \;^{72}Zn+\;^{160}sm + 4 n

<h3>What atomic mass?</h3>

Atomic mass, the quantity of matter contained in an atom of an element.

1) In the left side of the transmutation equation appears:

²³⁵U + ¹n →

Deleting the atomic number (subscript to the left) because the question does not show them as it is focused on a number of neutrons.

2) The right side of the transmutation equation has:

→ \;^{72}Zn+\;^{160}sm +?

3) The total mass number of the left side is 235 + 1 = 236

4) The total mass number of Zn and sm on the right side is 160 + 72 = 232

5) Then, you are lacking 236 - 232 = 4 unit masses on the right side which are the 4 neutrons that are produced along with the Zn and sm.

The complete final equation is:

²³⁵U + ¹n → \;^{72}Zn+\;^{160}sm + 4 n

Learn more about the atomic mass here:

brainly.com/question/14250653

#SPJ1

8 0
2 years ago
In the reaction H2CO3 (aq) + 3NH3 (aq) = 2 NH4+ (aq) + CO3 2-, how many electrons are transferred?
Scrat [10]

na look it up please im not that smart

5 0
2 years ago
What are the products in this chemical reaction? 2H3PO4+3Ca(OH)2→Ca3(PO4)2+6H2O
finlep [7]
<h2>Answer:C</h2>

Explanation:

A chemical equation is a equation that describes a corresponding chemical reaction.

A chemical reaction is generally written as

reactants→products

reactants refer to all the reactants involved in the chemical reaction.

Reactants are usually written on the left hand side of the chemical equation.

products refer to all the products formed in the chemical reaction.

products are usually written on the right hand side of the chemical equation.

In the given reaction,Ca_{3}(PO_{4})_{2},H_{2}O are written on the right side of the equation.

So,Ca_{3}(PO_{4})_{2},H_{2}O are the products.

5 0
3 years ago
Read 2 more answers
Consider the hypothetical serine protease, which shows the specificity pockets. The S1 pocket has a glutamic acid in the bottom,
BigorU [14]

Answer:

See explaination

Explanation:

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Please see attachment for the step by step solution of the given problem.

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What kind of bond holds together atoms within a molecule?
sesenic [268]
I think it would be these three answers ionic , covalent , and polar covalent
7 0
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