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Ierofanga [76]
3 years ago
13

A graduated cylinder is filled with 34.4 mL of water. A toy Car that weighs 43.672-g is Gently placed in the cylinder and the wa

ter level rises to 39.0 mL. What Is the density of the toy car
Chemistry
1 answer:
Thepotemich [5.8K]3 years ago
8 0

Answer:9.49g/mL

Explanation:

Mass of toy = 43.672g

Volume of water = 34.4mL

Volume of toy + volume of water = 39mL

Volume of toy = 39 — 34.4 = 4.6mL

Density = Mass /volume

Density = 43.672/4.6 = 9.49g/mL

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Answer:

Equation of reaction:

a) 2HCl + Ba(OH)2 ==> CaCl2 + 2H2O

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Explanation:

Using titration equation

CAVA/CBVB = NA/NB

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VA is the volume of acid = 25 ml

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Substituting

0.15×25/CB×44.45 = 2/1

Therefore CB =0.15×25×1/44.45×2

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2 years ago
A hydrogen halide diffuses 1.49 times faster than HBr. This hydrogen halide is
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To solve this problem, we must assume ideal gas behaviour so that we can use Graham’s law:

vA / vB = sqrt (MW_B / MW_A)

where,

<span>vA = speed of diffusion of A  (HBR)</span>

vB = speed of diffusion of B (unknown)

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We know from the given that:

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