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EleoNora [17]
3 years ago
7

A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the

test tube. Which of the following is a conclusion that the student can draw based on these observations? Question 12 options:
The two liquids have gone through a chemical change in which a new substance called a precipitate was produced.

The two liquids were pure substances before they were mixed.

The two liquids are toxic and should be handled with extreme caution.

The two liquids have been stored too long and are no longer good.
Physics
2 answers:
SIZIF [17.4K]3 years ago
4 0

I think the answer is A, please lmk if that is incorrect!

stira [4]3 years ago
3 0

Answer:

Option (1).

Explanation:

Precipitation reaction may be defined as the chemical reaction in which an insoluble substance called precipitate formed at the end of reaction. The ions are displaced twice during the precipitation reaction.

The mixing of two clear liquids forms a white substance. This substance is an insoluble precipitate that forms by the chemical combination of the reactants. The two reactants has undergone the chemical change that leads to the formation of precipitate.

Thus, the correct answer is option (1).

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When a quantity of monatomic ideal gas expands at a constant pressure of 4.00×104pa, the volume of the gas increases from 2.00×1
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5 0
3 years ago
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The collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy acquired by
Setler [38]

Here we can use momentum conservation as in this type of collision there is no external force on it

m_1v_{1i} + m_2v_{2i} = m_1 v_{1f} + m_2v_{2f}

now here we can say

m_1 = 10 g

v_{1i} = 0

m_2 = 550 g

v_{2i} = 3.5 m/s

now here we can say

10*0 + 550 * 3.5 = 10 v_{1f} + 550 v_{2f}

192.5 = v_{1f} + 55 v_{2f}

now by coefficient of restitution

for elastic collision we know that e = 1

v_{2f} - v_{1f} = e(v_{1i} - v_{2i})

v_{2f} - v_{1f} = 0 - 3.5

now by solving the two equation

56v_{2f} = 189

v_{2f} = 3.375 m/s

also we know that

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so final speed of the nail is 6.875 m/s


6 0
3 years ago
Read 2 more answers
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