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Sindrei [870]
3 years ago
8

Classify these compounds as ionic or molecular. ncl3 nabr

Chemistry
1 answer:
Svet_ta [14]3 years ago
3 0
NCl3= molecular compound

NaBr =  ionic compound

molecular  compound is formed  when two  non metals    form a bond by sharing electrons

in NCl3   electrons are  shared to each other

ionic compound is formed  when  a metal and a non-metal form a bond by losing and  gaining of electrons

In NaBr   Na is the metal  while Br is the non -metal. Na  loses  electrons while Br gain electrons
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Tema [17]

Answer:

I think D

Explanation:

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3 years ago
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.

Qw + Qc = 0

Qw = -Qc [1]

We can calculate each heat using the following expression.

Q = c × m × ΔT

where,

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163 mL of coffee with a density of 0.997 g/mL have a mass of:

163 mL × 0.997 g/mL = 163 g

From [1]

Qw = -Qc

cw × mw × ΔTw = -cc × mc × ΔTc

mw × ΔTw = -mc × ΔTc

mw × (54.0°C-25.0°C) = -163 g × (54.0°C-97.9°C)

mw × 29.0°C = 163 g × 43.9°C

mw = 247 g

The volume corresponding to 247 g of water is:

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3 years ago
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