<span>Percentage of the compound,
silicon = 6.360 %
bromine = 36.18 %
iodine = 57.46 %
In 100 grams of compound we will have
silicon = 6.36, bromine = 36.18, iodine = 57.46
Molar mass
silicon = 28.09, bromine = 79.90, iodine = 126.09
Calculating the moles,
silicon = 6.36 / 28.09 = 0.226
bromine = 36.18 / 79.90 = 0.452
iodine = 57.46 / 126.09 = 0.455
Divide with the lowest
silicon = 0.226 / 0.226 = 1
bromine = 0.452 / 0.226 = 2
iodine = 0.455 / 0.226 = 2
So the empirical formula would be SiBr2I2</span><span />
Answer:
<h2>Density = 10.01 g/cm³</h2>
Explanation:
The density of a substance can be found by using the formula
<h3>
</h3>
From the question
mass of metal = 54.52 g
Volume of metal = new volume - original volume of water in the cylinder
That's
new volume = 28.85 mL
original volume of water = 23.44 mL
Volume of metal
= 28.85 - 23.44 = 5.41 mL
Next we convert the volume from mL to cm³
1 mL = 1 cm³
5.41 mL = 5.41 cm³
Substitute the values into the above formula and solve
That's
<h3>
</h3>
We have the final answer as
<h3>Density = 10.01 g/cm³</h3>
Hope this helps you
Yes, it is possible if the death rate exceeds that of the birth rate. This death rate could be due to a dramatic change in climate, health issues in a population, etc.
Explanation:
The states may differ depending on the reactions
Answer:
Mass = 76.176 g
Explanation:
Given data:
Mass of lead(II) chloride produced = 62.9 g
Mass of lead(II) nitrate used = ?
Solution:
Chemical equation:
Pb(NO₃)₂ + 2HCl → PbCl₂ + 2HNO₃
Number of moles of lead(II) chloride:
Number of moles = mass/molar mass
Number of moles = 62.9 g/ 278.1 g/mol
Number of moles = 0.23 mol
Now we will compare the moles of lead(II) chloride with Pb(NO₃)₂ from balance chemical equation:
PbCl₂ : Pb(NO₃)₂
1 : 1
0.23 : 0.23
Mass of Pb(NO₃)₂:
Mass = number of moles × molar mass
Mass = 0.23 mol × 331.2 g/mol
Mass = 76.176 g
