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3 years ago

How do you identify unknown chemicals.

Chemistry

1 answer:

QveST [7]3 years ago

7 0

Answer:

Preventing Unknown Chemicals

Label all chemical containers, including beakers, flasks, vials, and test tubes.

Immediately replace labels that have fallen off or that are deteriorated.

Label containers using chemical names. ...

Archived research samples are often stored in boxes containing hundreds of small vials.

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Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be

Sphinxa [80]

Answer:

$P_4_{(I)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}$

Explanation:

The first step is:

$P_4_{(I)}+5O_2_{(g)}\rightarrow 2P_2O_5_{(g)}$

Second step is:

$P_2O_5_{(g)}+3H_2O_{(l)}\rightarrow 2H_3PO_4_{(l)}$

Multiplying second step by 2, and adding both the steps, we get that:

$P_4_{(I)}+5O_2_{(g)}+2P_2O_5_{(g)}+6H_2O_{(l)}\rightarrow 2P_2O_5_{(g)}+4H_3PO_4_{(l)}$

Cancelling common species, we get that:

$P_4_{(l)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}$

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3 years ago

When a solid has energy added and turns to a liquid what is it called?

Phoenix [80]

Melting (solid to liquid)

4 0

3 years ago

If the pressure on a gas sample is tripled and the absolute temperature is quadrupled, by what factor will the volume of the sam

antoniya [11.8K]

Answer:

b. 4/3

Explanation:

Given data

Initial pressure: P₁

Initial volume: V₁

Initial temperature: T₁

Final pressure: P₂ = 3 P₁

Final volume: V₂

Final temperature: T₂ = 4 T₁

We can find by what factor will the volume of the sample change using the combined gas law.

$\frac{P_{1}.V_{1}}{T_{1}} =\frac{P_{2}.V_{2}}{T_{2}}\\\frac{P_{1}.V_{1}}{T_{1}} =\frac{3P_{1}.V_{2}}{4T_{1}}\\V_{1} =\frac{3V_{2}}{4}\\V_{2}=4/3 V_{1}$

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3 years ago

30. A student builds a simple electric circuit.

Darya [45]

Answer:

A. thermal and light

Explanation:

• Light energy is the first energy produced by the bulb, with time heat energy or thermal energy is also produced.

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3 years ago

What is the boiling point of ch3ch2ch2ch3

Tasya [4]

It has a pb of 69c from google

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3 years ago