3 years ago

How could you separate a mixture of rocks and sand

Chemistry

1 answer:

Assoli18 [71]3 years ago

7 0

Sedimentation and decantation

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A 25 Ω resistor has a voltage drop of 12 V across it. Calculate the current flowing through the resistor

Yanka [14]

Answer:

0.48

Explanation:

$i = \frac{v}{r}$

because we are looking for I which is current we say

I = 12÷25 which is 0.48.

4 0

3 years ago

Can you please help me?

lorasvet [3.4K]

Answer:

60 moles of NaF

Explanation:

The balanced equation for the reaction is given below:

Al(NO3)3 + 3NaF —> 3NaNO3 + AlF3

From the balanced equation above,

3 moles of NaF reacted to produce 1 mole of AlF3.

Therefore, Xmol of NaF will react to produce 20 moles of AlF3 i.e

Xmol of NaF = 3 x 20

Xmol of NaF = 60 moles

Therefore, 60 moles of NaF are required to produce 20 moles of AlF3.

4 0

3 years ago

How far does light travel in 3.0 days

MArishka [77]

Answer:

$d=7.77\times 10^{13}\ m$

Explanation:

We know that the speed of light is equal to $3\times 10^8\ m/s$

We need to find how far the light travel in 3 days.

Speed of an object is equal to distance covered divided by time taken.

Also, 1 day = 86400 s

3 days = 259200 s

So,

$d=vt$

$d=3\times 10^8\times 259200\\\\d=7.77\times 10^{13}\ m$

So, the light will travel $7.77\times 10^{13}\ m$ in 3 days.

7 0

3 years ago

If the density of chloroform is 1.5 g/cm³, what is the mass of 50.0 cm³ of chloroform?

Marianna [84]

Density = mass / volume

1.5 = m / 50.0

m = 1.5 x 50.0

m = 75 g

hope this helps!

6 0

4 years ago

Read 2 more answers

What would the mass be for 500 ml of water?

Margarita [4]

The density of water is about 1.00 g/ml, so 500 ml of water is about 500 g

4 0

4 years ago