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Rufina [12.5K]
3 years ago
14

How to Convert 2.50mol of LiBr to g

Chemistry
1 answer:
julia-pushkina [17]3 years ago
6 0

Answer:

240.5g

Explanation:

steps:

given/ 1  - 2.5mol LiBr / 1

Multiplication - 78g/ 1 mol       ( 78 comes from the formula weight of LiBr )

answer- 240.5g

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How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 163 mL of coffee at 97.9°C so that the r
Stolb23 [73]

Answer:

248 mL

Explanation:

According to the law of conservation of energy, the sum of the heat absorbed by water (Qw) and the heat released by the coffee (Qc) is zero.

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We can calculate each heat using the following expression.

Q = c × m × ΔT

where,

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163 mL × 0.997 g/mL = 163 g

From [1]

Qw = -Qc

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mw × ΔTw = -mc × ΔTc

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mw × 29.0°C = 163 g × 43.9°C

mw = 247 g

The volume corresponding to 247 g of water is:

247 g × (1 mL/0.997 g) = 248 mL

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