Answer:
a) is correct.......,.....
Answer:
The coefficients are: 1, 2, 1, 2
Explanation:
To know which option is correct, we shall balance the equation. This can be obtained as follow:
SnO₂ + H₂ —> Sn + H₂O
There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before H₂O as shown below:
SnO₂ + H₂ —> Sn + 2H₂O
There are 2 atoms of H on the left side and a total of 4 atoms on the right side. It can be balance by writing 2 before H₂ as shown below:
SnO₂ + 2H₂ —> Sn + 2H₂O
Now the equation is balanced.
The coefficients are: 1, 2, 1, 2
Thus, none of the options are correct.
Answer:
If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.
Explanation:
Hope this helped! Please give brainly if you want!
Answer:
0.129g MgCl2
Explanation:
For this we need to understand the concept of molarity.
Molarity is number of moles of solute/litres of solution
M=n/L
Here we are given molarity of 0.054M and volume of 25ml. we just plug this in formula to find moles of MgCl2
0.054=x/(25/1000) (we divided 25 by 1000 to convert it to litres of solution)
x=0.00135 moles of MgCl2 (we are not done yet the question asks for grams so to convert to grams we multiply by molar mass of MgCl2.)
0.00135molesMgCl2 x 95.211g MgCl2/1molMgCl2
= 0.129g MgCl2