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3 years ago

Which direction does the red end of the needle of a compass point?

Chemistry

1 answer:

ruslelena [56]3 years ago

7 0

I don't understand, so I will say what I think you mean, The direction you want is North.

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PLEASE ANSWER ASAP! DOUBLE CHECK THE ANSWER!

hammer [34]

I believe the answer would be C, unbalanced.
Since the forces are in opposite directions, and aren't the same size, the answer would be unbalanced.

7 0

3 years ago

If 14.5 g of MnO4- (permanganate) react with manganese (II) hydroxide how many grams of manganese (IV) oxide will be produced? T

Veronika [31]

Answer:

$m_{MnO_2}=21.2gMnO_2$

Explanation:

Hello,

In this case, given the balanced reaction:

$2MnO_4^-+2Mn(OH)_2\rightarrow 4MnO_2+2OH^-+H_2O$

We can see a 2:4 mole ration between permanganate ion (118.9 g/mol) and manganese (IV) oxide (86.9 g/mol), that is why the resulting mas of this last one turns out:

$m_{MnO_2}=14.5gMnO_4^-*\frac{1molMnO_4^-}{118.9gMnO_4^-}*\frac{4MnO_2}{2molMnO_4^-} *\frac{86.9gMnO_2}{1molMnO_2} \\\\m_{MnO_2}=21.2gMnO_2$

Best regards.

5 0

3 years ago

How many moles are in 213 mg of calcium fluoride, CaF2?

lana [24]

Answer:

2.73

Explanation:

2.72815277835894

i used an online converter lol it is much faster. if you'd like a step by step guide comment and ill give you one :)

7 0

2 years ago

Read 2 more answers

Why is lead harmful to humans.

nalin [4]

It's harmful to humans; especially Children and Infants. Because it affects the development of the brain and nervous system

7 0

3 years ago

What is the density of a board dimensions are 5.54 cm x 10.6 cm X 199 cm and whose mass is 28.6kg

exis [7]

Answer:

$d=2.44\ g/cm^3$

Explanation:

Given that,

The dimensions of the board is 5.54 cm x 10.6 cm X 199 cm.

The mass of the board is 28.6 kg.

Since, 1 kg = 1000 grams

28.6 kg = 28.6 × 1000 g = 28600 grams

Density = mass/volume

So,

$d=\dfrac{28600\ g}{(5.54\times 10.6\times 199)\ cm^3}\\\\d=2.44\ g/cm^3$

So, the density of a board is $2.44\ g/cm^3$ .

4 0

3 years ago