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Elena L [17]
2 years ago
6

Q3. A student plans a method to prepare pure crystals of copper sulfate.

Mathematics
1 answer:
andreev551 [17]2 years ago
3 0

Answer:

1) The student didn't add copper sulfate but instead he added calcium carbonate.

2) The heated solution should be left to get bigger crystals and should not be instantly allowed to evaporate.

3) He should use copper carbonate not calcium carbonate.

4) Sulfuric acid was added instead of hydrochloric acid.

5) Add solid excessively so that all of the acid is retained.

6) Filter the solution to remove unreacted solid.

7) Heat gently, so the crystals will start to appear.

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8-4k=40
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vesna_86 [32]
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3 years ago
Felix Carson is employed at a high school. He has family medical coverage through the school's
Lady bird [3.3K]

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$56.77 each week

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3 years ago
A roller coaster’s height is given by the equation h = –.025t2 + 4t + 50, where t represents the time in seconds. How long will
netineya [11]

The time it took the rider to reach the ground level is 171.651seconds

<h3>Quadratic functions</h3>

Quadratic functions are functions that has a leading degree of 2.

Given the equation that represents  roller coaster’s height as shown

h = –0.025t^2 + 4t + 50

The coaster will reach the ground when h = 0

Substitute

0 = –0.025t^2 + 4t + 50

Factorize

On factorizing, the time it took the rider to reach the ground level is 171.651seconds

Learn more on quadratic function here: brainly.com/question/1214333

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6 0
1 year ago
What is the value of x in the equation −6 + x = −1? (5 points)
Mice21 [21]

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5

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