What element is used in a liquid metal used in thermometers
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What is the total number of moles of O2(g) required for the complete combustion of 1.5 moles of C3H8(g)?
(1) 0.30 mol (3) 4.5 mol
(2) 1.5 mol (4) 7.5 mol
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To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The moles of oxygen required is 7.5 mol.
What is stoichiometry?
Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects.
The balanced equation is
CH
(g) + 5O
(g)
3CO
(g) + 4H
O(g)
The mole ratio of CH
to oxygen is 1:5, means 1 mole of C
H
will react with 5 mole of oxygen. So, if we take 1.5 moles of C
H
then the amount of oxygen that will be produced will be 5 times the moles of
CH
. The moles of oxygen required to react with 1.5 moles of C
H
= 5× 1.5mol. Moles of oxygen required to react with 1.5 moles of C
H
=7.5 mol.
Therefore the moles of oxygen required is 7.5 mol.
To know more about stoichiometry, here:
#SPJ2
(2) 1670 J (4) 11 300 J
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Energy = 5 grams x 334 J/g
Energy = 1670 J
Answer:
It’s 2)
Explanation:
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9.86ml CH3COOH (X g/1ml) = g
1.049g/ml
9.86ml (1.049g/1ml) = 10.343 g
hope it helps
(2) Acids and bases are both H+ donors.
(3) Acids are H+ acceptors, and bases are H+ donors.
(4) Acids are H+ donors, and bases are H+ acceptors.
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Answer: Option (4) is the correct answer.
Explanation:
According to Bronsted and Lowry, acids are the species which can donate hydrogen or ions.
Whereas bases are the species which can accept hydrogen or ions.
Thus, we can conclude that the statement acids are donors, and bases are
acceptors describes an alternate theory of acids and bases.
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Answer:
MRCORRECT has answered the question
Explanation:
The color of human blood ranges from bright red when oxygenated to a darker red when deoxygenated. It owes its color to hemoglobin, to which oxygen binds.
B. stronger attraction for electrons
C. smaller number of first-shell electrons
D. larger number of first-shell electrons
Answers
Look into period table of elements at electronegativity.
Electronegativity of carbon is 2.5 and of fluorine 4.0.
Electronegativity is a strenght/ability to attract electrons.
Fluorine eletronegativity is much higher so it's atom has stronger attraction of electrons.