Answer:
123.2 Liters.
Explanation:
At STP (T = 273K & P = 1atm)<em>, one mol of any gas will occupy 22.4 liters</em>.
With the above information in mind, we can <u>calculate how many liters would 5.500 mol of gas occupy</u>:
5.500 mol * 22.4 L / mol = 123.2 L
So 5.500 moles of C₃H₃ would have a volume of 123.2 liters at STP.
Answer:
38.83 % of CaCO3
61.17 % of MgCO3
Explanation:
where Moles of CaCO3 is equals to x and MgCO3 is y we have that...
CaCO3 molar mass = 100.09 g / mol = 100.09 x
MgCO3 molar mass = 84.31 g / mol = 84.31 y
decomposition reactions :
CaCO3 ---> CaO + CO2
MgCO3 ---> MgO + CO2
So we have that , Moles of CaO = Moles of CaCO3 = x
and Moles of MgO = Moles of MgCO3 = y
CaO molar mass = 56.08 g / mol
MgO molar mass = 40.30 g / mol
CaO = 56.08 x
MgO = 40.30 y
"If the weight of the combined oxides is equal to 51.00% of the initial sample weight,"
total mass of MgO and CaO = 51.00 % of Total Mass of MgCO3 and CaCO3
thus
56.08 x + 40.30 y = 0.51 ( 100.09 x + 84.31 y )
56.08 x + 40.30 y = 51.04 x + 42.99y
5.04 x = 2.7 y
y = 1.87 x
CaCO3 % in the sample
= 100.09 x × 100 / ( 100.09 x + 84.31 y )
= 10009 x / ( 100.09 x + 84.31 × 1.87 x )
= 10009 x / ( x ( 100.09 + 157.66 ) )
= 10009 / 257.75
= 38.83 %
MgCO3 % in the sample
= 100 - 38.83
= 61.17 %
Answer:
18. E. 0%
19. D. 25%
Explanation:
Question 18:
Let's use "B" to represent the dominant allele of "light blue skin", and
"b" for recessive "light green skin".
Squidward => BB - light blue skin
Squidward's bride => bb - light green skin
When they cross, they will have the following offsprings:
(BB) × (bb) - Parent
(Bb) (Bb) (Bb) (Bb) - Offspring
All the offspring would be light green skin. The dominant allele of light green skin will express itself over the recessive allele.
Therefore, the chances of Squidward and his bride having light green skin is 0%
Question 19:
Squidward's son => Bb - light blue skin
Squidward's son's bride => Bb - light blue skin
(Bb) × (Bb) - parent
(BB) (Bb) (Bb) (bb) - offspring
They will have the following offspring:
BB and Bb - light blue - 75%
bb - light green - 25%
Chance of having offspring with light green skin is 25%
<span>An even smaller concentration measurement is parts per billion (ppb). One ppb is one part in 1 billion. One drop of ink in one of the largest tanker trucks used to haul gasoline would be an ink concentration of 1 ppb. It is important to know the difference between ppm and ppb. I hope this helped :)</span>
<h2>Let us solve for it </h2>
Explanation:
Magnesium oxide
- It is MgO
- Its molecular mass is : 24 +16=40 g
- When MgO decomposes it forms = 3.54 g of oxygen gas
- when 40 g of MgO decomposes it forms = 16g of oxygen
- or we can say that :
- 16g of oxygen is produced when 40 g of MgO is decomposed .
- 1g of oxygen will be formed from =40/16g of MgO
- 3.54 g of oxygen will be formed = 40/16 x 3.54 =8.85g of MgO
