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gizmo_the_mogwai [7]
3 years ago
8

An excess of Ba(No3)2 reacts with 250ml of H2SO4 solution to give 0.55g of BaSo4.determine The concentration in moles per litre

of the Ba(No3)2 solution?
Chemistry
1 answer:
Wewaii [24]3 years ago
7 0
Chemical reaction: Ba(NO₃)₂ + H₂SO₄ → BaSO₄ + 2HNO₃.
V(H₂SO₄) = 250 mL ÷ 1000 mL/L = 0,25 L.
m(BaSO₄) = 0,55 g.
n(BaSO₄) = m(BaSO₄) ÷ M(BaSO₄).
n(BaSO₄) = 0,55 g ÷ 233,38 g/mol.
n(BaSO₄) = 0,00235 mol.
From chemical reaction: n(BaSO₄) : n(Ba(NO₃)₂) = 1 : 1.
n(Ba(NO₃)₂) = 0,00235 mol.
c(Ba(NO₃)₂) = n(Ba(NO₃)₂) ÷ V.
c(Ba(NO₃)₂) = 0,00235 mol ÷ 0,25 L.
c(Ba(NO₃)₂) = 0,0095 mol/L.
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<h3>What is the amount of Amoxicillin dose given to the child?</h3>

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amount of Amoxicillin dose = weight of the child x dosage prescribed

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The weight of the child in pounds (lb) is calculated as follows;

1 lb = 0.453592 kg

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amount of Amoxicillin dose = 1,743.3 mg

Thus, the amount of Amoxicillin dose given to the 85.4 lb child daily is determined as 1,743.3 mg.

Learn more about amount of dose here: brainly.com/question/11185154

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The complete question is below:

A 85.4 lb child has a Streptococcus infection. Amoxicillin is prescribed at a dosage of 45 mg per kg of body weight per day given b.i.d. Calculate the daily dose of the child.

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1 year ago
How many moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose
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Calculate the volume of a 3.50 M solution of H2SO4 made from 49 g of H2SO4
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Answer:

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