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3 years ago

What is the charge of iron in FePO4

1 answer:

6 0

PO4 is phosphate and it has a negative charge of 3

It is what we call a polyatomic ion. You kind of have to know these by memory or through some sheet, but since the charges have to be neutral Iron would have to be a positive 3

Hope this helped!

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dimulka [17.4K]

Answer:

Explanation:

I just learned all this in chemistry too lol

got 100 on the test last week so its good

6 0

3 years ago

Ethanol has a Kb of 1.22 Degrees C/m and usually boils at 78.4 Degrees Celcius. How many mol of an nonionizing solute would need

Gala2k [10]

Answer:

0.3097 moles of an nonionizing solute would need to be added.

Explanation:

Molal elevation constant = $k_b=1.22^oC/m$

Normal boiling point of ethanol = $T_o=78.4^oC$

Boiling of solution = $T_b=86.30^oC$

Moles of nonionizing solute = n

Mass of ethanol (solvent) = 47.84 g

Elevation boiling point:

$\Delta T_b=T_b-T_o$

$\Delta T_b=86.30^oC-78.4^oC=7.9^oC$

$\Delta T_b=K_b\times m$

$m=\frac{\text{Moloes of solute}}{\text{Mass of solvent(kg)}}$

$7.9^oC=1.22^oC/m\times \frac{n}{0.04784 kg}$

n = 0.3097 mol

0.3097 moles of an nonionizing solute would need to be added.

4 0

4 years ago

How many formula units of CaSO4 are in 17g of CaSO4?

Semmy [17]

CaSO4 has a molar mass of 136.145 (40.08+32.065+16*4).
17 g / 136.145g= ~0.125 formula units (0.12 with appropriate significant figures)

5 0

4 years ago

How does the hard corals make their skeleton from seawater?

miskamm [114]

Answer:

Small marine animals produce a very hard skeleton made of calcium carbonate, which they extract from the seawater and combine CO2 for limestone.

<em>Hope this helps, please mark brainliest? :))</em>

6 0

3 years ago

Which of the following is not a type of energy

Usimov [2.4K]

C. Heat answer correct that

8 0

3 years ago

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