CaCO₃ → CaCl₂
Ca = 40, C = 12, O = 16, Cl = 35.5
100 →111
3 → x
x = 3.33g
Answer:
0.97 × 10⁹ strontium atoms
Explanation:
if 1 pm is equal with 10⁻⁹ mm
then 215 pm are equal to X mm
X = (215 × 10⁻⁹) / 1 = 215 × 10⁻⁹ mm
Now the diameter of the strontium atom is twice the radius:
diameter = 215 × 10⁻⁹ × 2 = 430 × 10⁻⁹ mm
if 1 strontium atom have a diameter of 430 × 10⁻⁹ mm
then X strontium atom are needed to be laid said by side to span a distance of 419 mm
X = (419 × 1) / (430 × 10⁻⁹) mm = 0.97 × 10⁹ strontium atoms
You must add 7.5 pt of the 30 % sugar to the 5 % sugar to get a 20 % solution.
You can use a modified dilution formula to calculate the volume of 30 % sugar.
<em>V</em>_1×<em>C</em>_1 + <em>V</em>_2×<em>C</em>_2 = <em>V</em>_3×<em>C</em>_3
Let the volume of 30 % sugar = <em>x</em> pt. Then the volume of the final 20 % sugar = (5 + <em>x</em> ) pt
(<em>x</em> pt×30 % sugar) + (5 pt×5 % sugar) = (<em>x</em> + 5) pt × 20 % sugar
30<em>x</em> + 25 = 20x + 100
10<em>x</em> = 75
<em>x</em> = 75/10 = 7.5
If the earth rotates 360 degrees at 100,000 mph the core of the earth would start burning up the entire human population would go extinct we would have to have an escape pod to go to mars and make a new home there
Answer:
The answer to your question is: 8.31 x 10 ²² atoms
Explanation:
butane C₄H₁₀
carbon atoms in 2 g of butane
MW C₄H₁₀ = (4 x 12) + (1 x10) = 48 + 10 = 58 g
58 g of butane ------------------- 48 g of C
2 g of butane ----------------- x
x = (2 x 48) / 58 = 1.655 g of C
1 mol C ------------------- 12 g
x ------------------ 1.655 g
x = (1.655 x 1) / 12 = 0.14 mol of C
1 mol of C ------------------- 6.023 x 10 ²³ atoms
0.14 mol of C ---------------- x
x = ( 0.14 x 6.023 x 10 ²³) / 1
x = 8.31 x 10 ²² atoms
