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3 years ago

You are planning an investigation that explores properties of matter.

Chemistry

1 answer:

Elena-2011 [213]3 years ago

7 0

Answer:

Placing a powder into a beaker that contains liquid, resulting the beaker to get hotter.

Explanation:

Physical property is something that you can observe that does not affect the mixture/solution/substance, and that includes temperature

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Find the density of an object that has a mass of 5 kg and a volume of 50 cm3?

myrzilka [38]

Density = mass / volume

Mass = 5 kg

Volume = 50 cm³

d = 5 / 50

d = 0,1 kg/cm³

4 0

3 years ago

Silver was precipitated and collected by filtration. The experiment yielded .077g of silver after dying. The predicted yield was

PSYCHO15rus [73]

Answer:

Precentage error = 7.23%

Explanation:

The precentage error formula is the useful method for determining precision of your experimental result

It can be calculated using :

$percent\ error = |\frac{experimental\ value-predicted\ value} {predicted\ value}|\times 100$

$percent\ error = |\frac{0.077\ -0.083} {0.083}|\times 100$

So we get percentage error = 7.23%

Precision means how close the experimental value to the true value or theoretical value

If percentage error is large it means experimental results are deviated and there is need to check mistakes,imprecision in the experiment

If the percentage error is zero it means the experiment is perfectly done without inaccuracy

4 0

3 years ago

PLEASE HELP ME URGENT!!! How do i find mass when not given in chemistry

Arisa [49]

Answer:

It depends what other values you have. Can you give more info? If they give density then you can solve for m.

3 0

3 years ago

a compound with the empirical formula CH2 has a molar mass of 112 g/mol. What is the molecular formula for this compound?

Solnce55 [7]

Hope it cleared your doubt :-D

4 0

3 years ago

What causes a spring to bounce up when it is pushed down and then released?

nalin [4]

(a) Pushing the spring down gives it stored mechanical energy that turns into motion

Explanation:

Pushing on the spring causes the mechanical energy, of pushing on the spring, to be stored in the spring through potential elastic energy. Due to the elasticity of the spring, when the spring is released and resumes its initial shape the stored energy is released and can be used to do work such as motion.

4 0

3 years ago