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3 years ago

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

Mathematics

1 answer:

andreev551 [17]3 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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Find solution to the system of linear equations. 5x1 + x2 = 0 , 25x1 + 5x2 = 0

Zigmanuir [339]

Answer:

the system of equation has infinite solution

Step-by-step explanation:

$5x_1 + x_2 = 0$ , $25x_1 + 5x_2 = 0$

Solve the first equation for x_2

Subtract 5x1 on both sides

$5x_1 + x_2 = 0$

$x_2 =-5x_1$

Now substitute -5x1 on second equation

$25x_1 + 5x_2 = 0$

$25x_1 + 5(-5x_1)= 0$

$25x_1-25x_1= 0$

0=0

So the system of equation has infinite solution

5 0

3 years ago

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an initial population of 700 trout increases at an annual rate of 22%. Which exponential function models the trout population?

REY [17]

Answer:

$y=700(1.22)^{x}$

Step-by-step explanation:

Let

y-----> the trout population

x----> the time in years

we know that

$22\%=22/100=0.22$

$y=700(1+0.22)^{x}$

$y=700(1.22)^{x}$ ----->exponential function that models the trout population

7 0

3 years ago

I need help In this please

Shalnov [3]

The answer is x < 12

1) Minus 6 from both sides of the inequality

2) Multiply both sizes by 4

3) Divide both sides by -3

4) Swap the direction of the inequality (You always do this when you multiply/divide both sizes of an inequality)

5) You should have x < 12

3 0

4 years ago

What is the area??? 12m 6m 3m

soldi70 [24.7K]

Area of rectangle =lxb =12 x6 =answer

6 0

3 years ago

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If i= square root of -1, what is the value of i 3?

Furkat [3]

If i = √-1 ,

then ...

i² = (√-1)² = -1

i³ = - √-1 = -i <== the answer to the question

i⁴ = (i²) · (i²) = (-1) · (-1) = 1

and then the whole thing starts over again, for higher powers of i .

6 0

3 years ago

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