Density = 968 g/cm³
mass = 250 g
Volume = ?
Therefore:
D = m / V
968 = 250 / V
V = 250 / 968 => 0.26 cm³
Answer C
Answer:
moles Hg = 25.8 / 200.59 = 0.129
atoms = 0.129 x 6.02 x 10^23 =7.74 x 10^22
Moles Zn = 0.0340 / 65.39 =0.000520
atoms = 3.13 x 10^20
work in the same way : divide the mass by the molar mass and multiply by 6.02 x 10^23
Explanation:
Answer:
H2 + I2 —> 2HI
Explanation:
H2 + I2 —> HI
Now, let us balance the equation. This can be achieved by doing the following:
There are 2 atoms of H on the left side of the equation and 1atom on the right side. It can be balance by putting 2 in front of HI as shown below:
H2 + I2 —> 2HI
Now the equation is balanced as there are equal numbers of atoms of the different elements present on both sides of the equation.
