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Naya [18.7K]
4 years ago
12

The standards used to make a judgment or decision when designing a product are called _______. A. prototypes B. criteria C. desi

gns D. investigations
Chemistry
2 answers:
Elenna [48]4 years ago
7 0
B. criteria because it's a principal or standard by which something may be judged or decided  <span />
Fittoniya [83]4 years ago
5 0

Answer:

B is the correct answer

Explanation:

I just took the test on edge :-)

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g What is the relationship between the moles of the limiting reagent and the change in temperature (i.e. directly proportional o
ivann1987 [24]

Answer:

number of moles is inversely proportional to the Temperature

Explanation:

As we know

PV = nRT

where P is the pressure

V is the volume

n is the number of moles

R is the gas constant

and T is the temperature

If we see the equation, we can find that n is inversely proportional to the Temperature

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3 years ago
How to separate sand from salt
IRINA_888 [86]
Put the salt and sand in some water.
the salt will not be visible but the sand will
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3 years ago
Reacts with air..physical or chemical property ;)
Mila [183]
It is a chemical <em>process</em> - an oxidation.
3 0
3 years ago
Read 2 more answers
Whoever awser correct I will give you Brainly
vivado [14]

Answer:

Option A.

2Na + 2H2O —> 2NaOH + H2

Explanation:

To know which option is correct, we shall do a head count of the number of atoms present on both side to see which of them is balanced. This is illustrated below below:

For Option A:

2Na + 2H2O —> 2NaOH + H2

Reactant >>>>>>> Product

2 Na >>>>>>>>>>> 2 Na

4 H >>>>>>>>>>>> 4 H

2 O >>>>>>>>>>>> 2 O

Thus, the above equation is balanced.

For Option B:

2Na + 2H2O —> NaOH + H2

Reactant >>>>>>> Product

2 Na >>>>>>>>>>> 1 Na

4 H >>>>>>>>>>>> 3 H

2 O >>>>>>>>>>>> 1 O

Thus, the above equation is not balanced.

For Option C:

2Na + H2O —> 2NaOH + H2

Reactant >>>>>>> Product

2 Na >>>>>>>>>>> 2 Na

2 H >>>>>>>>>>>> 4 H

1 O >>>>>>>>>>>> 2 O

Thus, the above equation is not balanced.

For Option D:

Na + 2H2O —> NaOH + 2H2

Reactant >>>>>>> Product

1 Na >>>>>>>>>>> 1 Na

4 H >>>>>>>>>>>> 5 H

2 O >>>>>>>>>>>> 1 O

Thus, the above equation is not balanced.

From the illustrations made above, only option A is balanced.

7 0
3 years ago
When a metal and a non-metal react, the ____ tends to lose electrons and the ____ tends to gain electrons?
valentina_108 [34]
<span>When a metal and a non-metal react, the metal tends to lose electrons and the non metal tends to gain electrons?</span>
8 0
3 years ago
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