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Zigmanuir [339]
3 years ago
11

Al + h2so4 → al2(so4)3 + h2 when the equation is correctly balanced, the coefficient of h2so4 is -

Chemistry
1 answer:
Yuri [45]3 years ago
8 0
First, we have to balance the equation:

Al +  H2SO4 → Al2(SO4)3 + H2

we have the number of Al atoms not equal on both sides so we will put 2 Al instead of Al on the left side of the equation.

2Al + H2SO4  → Al2(SO4)3 + H2 

now we have an unequal number of (SO4) group on both sides of the equation so we put  3H2SO4 instead of H2SO4

2Al + 3H2SO4 → Al2(SO4)3 + H2

now, we have to put 3H2 instead of H2 to make the H atoms equals on both sides.

2Al + 3H2SO4 → Al2(SO4)3 + 3H2 this is the final balanced equation.

∴ the coefficient of  H2SO4 is 3
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Why do atoms separate in molecules
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Answer:

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5 0
2 years ago
Given 8.25 g of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100
mash [69]

Answer:

              10.87 g of Ethyl Butyrate

Solution:

The Balance Chemical Equation is as follow,

   H₃C-CH₂-CH₂-COOH + H₃C-CH₂-OH  →  H₃C-CH₂-CH₂-COO-CH₂-CH₃ + H₂O

According to equation,

    88.11 g (1 mol) Butanoic Acid produces  =  116.16 g (1 mol) Ethyl Butyrate

So,

           8.25 g Butanoic Acid will produce  =  X g of Ethyl Butyrate

Solving for X,

                      X =  (8.25 g × 116.16 g) ÷ 88.11 g

                      X =  10.87 g of Ethyl Butyrate

8 0
3 years ago
The density of liquid mercury is 13.69 g/cm^3. How many atoms of mercury are in a 15.0 cm^3 sample? Use "E" for "x10" and use si
balu736 [363]
The formula is  m = D x V
D = <span>13.69 g/cm^3.
</span>V = <span>15.0 cm^3 
the mass of the liquid mercury is m= </span>13.69 g/cm^3 x 15.0 cm^3 = 195g
the molar mass of Hg is 200,
1 mole of Hg = 200g Hg, so #mole of Hg= 195 / 200 = 0.97 mol
but we know that
 1 mole  = 6.022 E23 atoms
0.97 mole=?

6.022 E23 atoms x 0.97 / 1 mole = 5.84 E23 atoms
6 0
3 years ago
Calcium’s atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?
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It would be a positive charge because it lost two electrons, if the charge was neutral it would be the same amount of protons and electrons, if the charge was negative the electrons would be 20 instead of 18. So in this case it is positive.
6 0
3 years ago
What process is being shown by water being given off from each bond site?
34kurt
The process that is being shown by water being given off from a bond site is DEHYDRATION SYNTHESIS.
Dehydration synthesis is the process of joining two molecules or compounds together as a result of removal of water.
4 0
3 years ago
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