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3 years ago

Which equation represents sublimation?

2 answers:

8 0

Answer is 3) - H₂O(s) → H₂O(g)

Sublimation can be defined as the type of phase conversion of a substance which is in its solid phase to a gaseous phase without going through its liquid phase. 

According to the given choices only third one is correct because solid H₂O goes to its vapor without going liquid state.

agasfer [191]3 years ago

5 0

Third one because sublimation is changing from solid to gas

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Of the following choices, pick all that are uses for radiation. Check all that

Novosadov [1.4K]

A B C these are the answers hopes this help <3

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3 years ago

A chemist performs the same tests on two white solids, A and B. The results are shown in the table below.

Roman55 [17]

Answer:

i'm not sure but mabey A?

Explanation:

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3 years ago

Read 2 more answers

A balance and a graduated cylinder are used to determine the density of a liquid sample. The sample has a mass of 14.0 g and a v

mylen [45]

Answer:

Density = 7 g/mL

Explanation:

Given that,

Mass of a sample, m = 14 g

Volume of the sample, V = 2 mL

We need to find the density of the liquid sample. We know that the density of an object is given by :

$d=\dfrac{m}{V}\\\\d=\dfrac{14\ g}{2\ mL}\\\\d=7\ g/mL$

So, the density of the liquid sample is 7 g/mL.

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3 years ago

A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The

Anna35 [415]

Answer:

-24.76 kJ/g; -601.8 kJ/mol

Explanation:

There are two heat flows in this experiment.

Heat from reaction + heat absorbed by calorimeter = 0

q1 + q2 = 0

mΔH + CΔT = 0

Data:

m = 0.1375 g

C = 3024 J/°C

ΔT = 1.126 °C

Calculations:

0.1375ΔH + 3024 × 1.126 = 0

0.1375ΔH + 3405 = 0

0.1375ΔH = -3405

ΔH = -24 760 J/g = -24.76 kJ/g

ΔH = -24.76 kJ/g ×24.30 g/mol = -601.8 kJ/mol

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3 years ago

True or False? SLOW moving water deposits sediment.

wolverine [178]

no probs at all :)

5 pts

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3 years ago