287.2L
Explanation:
Given parameters:
Mass of sodium peroxide = 1000g = 1kg
Unknown
volume of oxygen produced at STP
Solution:
At standard temperatue and pressure STP;
Number of moles = 
molar mass of Na₂O₂ = (2 x 23) + (2 x 16 ) = 78g/mol
Number of moles = 
= 12.82mole
To solve this problem, we need to write the equation of the reaction since this is a decomposition reaction;
Na₂O₂ → 2Na + O₂
The unknown is the volume of oxygen that would be produced at STP
Volume of gas at STP = number of moles x 22.4
From the equation;
1 mole of Na₂O₂ produced 1 mole of O₂ gas
12.82mole will produce 12.82mole of oxygen gas
Now, the volume of gas at STP = 12.82 x 22.4 = 287.2L
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Volume of gas at STP brainly.com/question/12684384
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1.2over2=0.6 as molarity then we know that molar volume=22.4dm3
molarity=volume per molar volume
therefore volume=molarity ×molar volume= 0.6 x 22.4= 13.44
Answer:
Check the image above
explanation:
When naming organic compounds based on IUPAC; we take note of functional group, position of functional group.
In 2,3,4-trimethyl-3-heptanol, the functional group is hydroxyl group ( OH ). It is on position 3 (2,3,4-trimethyl<u>-</u><u>3</u><u>-</u>heptanol. Then we put it on the third carbon. Another functional group is methyl group, with three positions, 2, 3, and 4.
In 4-ethyl-4-octanol, the functional group is hydroxyl group ( OH ) which is in position 4 on the fourth carbon. Another functional group is ethyl group in position 4 on the fourth carbon. In this case, the functional groups that have same position, are put on that same carbon.
The number of Ml of 0.80 M sucrose solution that contain
(A) 7.45 g are 27.25 Ml
<u>calculation</u>
volume= moles /molarity
molarity = 0.80 M which is the same as 0.80 mol/l
moles= mass/molar mass
= 7.45 g/ 342.3 g/mol =0.0218 moles
volume is therefore = 0.0218 moles / 0.80 mol/L=0.02725 L
convert into ml by multiplying by 1000
= 27.25 ml
<h3>
<u>
question b</u></h3>
volume = moles/molarity
molarity = 0.80 M = 0.80 Mol/L
moles =mass/molar mass
mass 17.0 mg convert into g by diving by 1000=0.017 g
moles is therefore = 0.017 g/ 342.3 g/mol = 4.97 x10^-5 moles
volume = (4.97 x 10^-5 moles) /0.8 mol /l=6.21 x10^-5 L
= 6.21 x10^-5 x 1000 =0.0621 Ml
