Answer:
Explanation:
as we know that 1kg =1,000,000 mg
therefore
0.425 kg= 0.425*1,000,000/1=425000
result:
0.425 kg contain 425000 mg
i hope this will help you
Answer:
8.8 cm³
Explanation:
Data given:
volume of Liquid = 0.0088 L
convert volume to Cubic centimeters
Solution:
There are number of unit in which volume can be measured
As
Liter is unit of volume represented by L
Cubic centimeters represented by cm³
liter is larger value then cm³
Now to convert L to cm³
As we Know
1 L = 1000 cm³
So
Apply unity formula
1 L = 1000 cm³
0.0088 L = x cm³
Do Cross multiplication
x cm³ = 0.0088 L x 1000 cm³ / 1 L
x cm³ = 8.8 L.cm³ / 1 L
x cm³ = 8.8 cm³
So,
0.0088 L of liquid = 8.8 cm³
Answer:
6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.
Explanation:
We are given the chemical equation:
And we want to determine the amount of products produced when 12.5 moles of NH₃ is reacted with excess CuO.
Compute using stoichiometry. From the equation, we can see the following stoichiometric ratios:
- The ratio between NH₃ and N₂ is 2:1. (i.e. One mole of N₂ is produced from every two moles of NH₃.)
- The ratio between NH₃ and Cu is 2:3.
- The ratio between NH₃ and H₂O is 2:3. (i.e. Three moles of H₂O or Cu is produced frome every two moles of NH₃.)
Dimensional Analysis:
- The amount of N₂ produced:
- The amount of Cu produced:
- And the amount of H₂O produced:
In conclusion, 6.25 moles of N₂ is produced, and 18.8 moles of Cu and H₂O is produced.
Answer:
1.71 × 10²¹ molecules
Explanation:
1 gram is equal to 1000 milligrams. The mass in grams corresponding to 500 mg is:
500 mg × (1 g / 1000 mg) = 0.500 g
The molar mass of ascorbic acid is 176.12 g/mol. The moles corresponding to 0.500 grams of ascorbic acid are:
0.500 g × (1 mol/ 176.12 g) = 0.00284 mol
In 1 mole of ascorbic acid, there are 6.02 × 10²³ molecules of ascorbic acid (Avogadro's number). The molecules in 0.00284 moles are:
0.00284 mol × (6.02 × 10²³ molecules/ 1 mol) = 1.71 × 10²¹ molecule
Answer:
D
Explanation:
the charges need to balence out
so finding the LCM which is 12 we find we need 3x's
and 4 zs
so that makes the formula X3Z4 which is D
