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3 years ago

What is the name of the compound Ca3P2?

Chemistry

2 answers:

iragen [17]3 years ago

8 0

Calcium phosphide hope this helped

Luden [163]3 years ago

3 0

Calcium phosphide thats is it

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30 mL of 0.6 M HCl solution is neutralized with 90 mL NaOH solution. What is the concentration of the base? Show all work Please

skad [1K]

From

na=1

nb=1

Va=30mls

Vb=90mls

Ma=0.6M

Mb=?

from

Mb=Ma×Va×nb

 Vb×na

Mb=0.6×30×1

 90×1

mb=18

 90

Mb=0.2M

NaOH=40

From

conc=molarity×mr

conc=0.2×40

conc=8g/mol

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3 years ago

Which substance has Hf defined as 0 kJ/mol? H2O (s) Ne (l) O2 (g) CO2 (g)

vlabodo [156]

Answer:

O₂ (g).

Explanation:

All elements that found in nature has heat of formation (Hf) equal 0 J/mol.

So, the substance that has heat of formation (Hf) equal 0 J/mol is O₂ (g).

H₂O is formed from the reaction of hydrogen and oxygen and has Hf, Also, the solidification of H₂O (s) from H₂O (l) has (Hf).

Although, Ne (g) is found in nature and has no Hf, the liquification to form Ne (l) has heat of formation (Hf).

CO₂ (g) is formed from the reaction between carbon and oxygen and so has heat of formation (Hf).

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3 years ago

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Which of these is a physical property of a tree?

Anit [1.1K]

Is there answer choices?

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3 years ago

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What pressure is required to reduce 40 ml of a gas at standard conditions to 20 ml at a temperature of 21?c? answer in units of

ElenaW [278]

If you need half the volume, you need double the pressure (V * p). Normal air pressure in the atmosphere is 101300 Pa so that means you need double that, thus 202600 Pa (or 2,026 bars)

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3 years ago

A species of rabbit lives in a grassland ecosystem. Rabbits of this species have brown fur that allows them to blend in with the

Vikentia [17]

Answer: c

Explanation:

The fur of the rabbit species changes over time from brown to white which helps them to blend with the environment.

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3 years ago