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marissa [1.9K]
3 years ago
8

PLEASE LOOK AT POST MARKING BRAINIEST

Chemistry
1 answer:
Charra [1.4K]3 years ago
8 0

Explanation:

             MgF₂ + ___Li₂CO₃  → ___MgCO₃ + ___LiF

1. Every chemical reactions obey the law of conservation of matter. The law states that "matter can neither be created not destroyed but transformed from one form to another".

 When chemical reactions are balanced, they simply obey the law of conservation of matter and mass. This makes makes measurement easy to make when carrying out experiments. One can easily deduce the amount of reactants to be used and the products expeceted

2                 MgF₂ + ___Li₂CO₃  → ___MgCO₃ + ___LiF

  to balance the equation:

  • check if the equation is balanced.
  • Put a,b,c and d before each of the products and reactants.

                  aMgF₂ + bLi₂CO₃  → cMgCO₃ + dLiF

  • The coefficients are needed to balance the equation:

  conserving Mg:       a = c

                       F:         2a = d

                       Li:        2b = d

                        C:        b = c

                        O:       3b = 3c

  • From the above:

       let us assume that    a=1

         then                         c = 1

                                          b = 1

                                          d =2

     

                         MgF₂ + Li₂CO₃  → MgCO₃ + 2LiF

Learn more:

Balanced chemical reaction brainly.com/question/11102790

#learnwithBrainly

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1093.5 rounded into 3 sig figs
Ray Of Light [21]
Significant figures means the number of important figures, 0 not included.

This means that the answer is 1094.00

Hope this helps! :)

3 0
3 years ago
A 25. 00 ml sample of acetic acid containing phenolphthalein indicator is titrated with 0. 1067 m naoh. The solution changes col
sasho [114]

The concentration of acetic acid:

The concentration of the acetic acid before titration is 0.128 M

What is titration?

Titration is a quantitative analytical procedure that works by allowing a known analyte to gradually react with a titrant until an endpoint is reached.

Titration for weak acid and strong base:

Moles of acetic acid =  moles of NaOH

Given:

Concentration of NaOH = 0.1067 M

Volume of NaOH = 30.07 ml = 0.03007 L

Calculation:

So, by using the formula, Concentration = Moles/Volume

Moles of NaOH = concentration x volume = 0.1067 x 0.03007 = 0.0032

Therefore, the moles of acetic acid  = 0.0032 mole

Now, using the formula again for determining the concentration of acetic acid, we get,

Concentration = Moles/Volume

Concentration of acetic acid =  0.0032/0.025 = 0.128M

Learn more about titration here,

brainly.com/question/2728613

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7 0
2 years ago
BRAINLIEST!!! ❣
SOVA2 [1]
Q1. A.

Q2. Nitrous oxide

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8 0
3 years ago
Read 2 more answers
PLEASE HELP, dana wants...​
tensa zangetsu [6.8K]

Answer:

C

Explanation:

8 0
3 years ago
Read 2 more answers
An organic compound is 61.5% C, 2.56% H and 35.9% N by mass. 2.00 grams of this gas is entered into a 300.0 mL flask and heated
pashok25 [27]

Answer:

C₄H₂N₂

Explanation:

First we<u> calculate the moles of the gas</u>, using PV=nRT:

P = 2670 torr ⇒ 2670/760 = 3.51 atm

V = 300 mL ⇒ 300/1000 = 0.3 L

T = 228 °C ⇒ 228 + 273.16 = 501.16 K

  • 3.51 atm * 0.3 L = n * 0.082atm·L·mol⁻¹·K⁻¹ * 501.16 K
  • n = 0.0256 mol

Now we<u> calculate the molar mass of the compound</u>:

  • 2.00 g / 0.0256 mol = 78 g/mol

Finally we use the percentages given to<em> </em><u>calculate the empirical formula</u>:

  • C ⇒ 78 g/mol * 61.5/100 ÷ 12g/mol = 4
  • H ⇒ 78 g/mol * 2.56/100 ÷ 1g/mol = 2
  • N ⇒ 78 g/mol * 35.9/100 ÷ 14g/mol = 2

So the empirical formula is C₄H₂N₂

6 0
3 years ago
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