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Anna35 [415]
3 years ago
12

Which types of changes must follow the law of conservation of mass?

Chemistry
1 answer:
Elis [28]3 years ago
6 0

Answer: both

Explanation:

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When ethyl acetoacetate (ch3coch2co2ch2ch3) is treated with one equivalent of ch3mgbr, a gas is evolved from the reaction mixtur
pashok25 [27]
The protons of methylene group between the two carbonyl groups in ethylacetoacetate are acidic in nature. When compounds containing such acidic protons are treated with bases the loose proton and form enolates.

In this particular example when ethylacetoacetate is reacted with methyl magnesium bromide, the methyl group abstracts the acidic proton and converts into methane gas. The enolate when hydrolyzed is again converted into ethylacetoacetate as shown below,

6 0
3 years ago
A chemical reaction produced 10.1 cm3 of nitrogen gas at 23 °C and 746 mmHg. What is the volume of this gas if the temperature a
adell [148]

Answer:

volume of gas = 9.1436cm³

Explanation:

We will only temperature from °C to K since the conversion is done by the addition of 273 to the Celsius value.

Its not necessary to convert pressure and volume as their conversions are done by multiplication and upon division using the combined gas equation, the factors used in their conversions will cancel out.

V1 =10.1cm³ , P1 =746mmHg,     T1=23°C =23+273=296k

V2 =? ,   P2 =760mmmHg ,     T2=0°C = 0+273 =273K

Using the combined gas equation to calculate for V2;

\frac{V1P1}{T1}=\frac{V2P2}{T2} \\ re-arranging, \\V2 =\frac{V1P1T2}{P2T1}

V2 =\frac{10.1*746*273}{760*296}

V2=9.1436cm³

6 0
4 years ago
Why can gasses change volume?​
soldi70 [24.7K]

Answer:

b. I've seen a question like this before lol

7 0
3 years ago
Read 2 more answers
In which pair do both compounds exhibit predominantly ionic bonding?
klasskru [66]

Answer:

In pair NaF and H2O both compounds exibit predominantly ionic bonding.

4 0
2 years ago
Sodium is reacted with chlorine to produce sodium chloride. How much sodium chloride is produced when 45 grams of sodium reacted
77julia77 [94]

Answer:

114.7g

Explanation:

Given parameter:

Mass of Na = 45g

Unknown:

Mass of produced NaCl  = ?

Solution:

The reaction equation is shown below;

          2Na + Cl₂   →   2NaCl

Now, we solve from the known to the unknown. The known here is the mass of Na and it is sufficient to solve the problem;

         Number of moles  = \frac{mass}{molar mass}

 Molar mass of Na = 23g/mol

            Number of moles  = \frac{45}{23}   = 1.96moles

               2 mole of Na produced  2 moles of NaCl

              1.96 moles of Na will produce 1.96 moles of NaCl

Mass of NaCl  = number of moles x molar mass

                         = 1.96 x [23 + 35.5]

                         = 114.7g

5 0
3 years ago
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