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3 years ago

I NEED HELP PLEASE, THANKS~ :)

Chemistry

1 answer:

balandron [24]3 years ago

7 0

Answer:

See explanation

Explanation:

On a molecular scale, when you drop a small amount of NaCl or table salt into water, the molecules of salt break apart from each other and diffuse into the liquid because they are attracted to it more strongly. When the water is hot, the molecules diffuse more quickly, because the water molecules move faster and attract the salt molecules faster.

Hope this helps!

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How many kilograms of a fertilizer are made of pure P2O5 would be required to supply 1.69 kilogram of phosphorus to the soil?

Alekssandra [29.7K]

Answer:

3.89 kg P2O5 must be used to supply 1.69 kg Phosphorus to the soil.

Explanation:

The molecular mass of P2O5 is

P2 = 2* 31 = 62

O5 = 5 *<u> 16 = 80</u>

Molecular Mass = 142

Set up a Proportion

142 grams P2O5 supplies 62 grams of phosphorus

x kg P2O5 supplies 1.69 kg of phosphorus

Though this might be a bit anti intuitive, you don't have to convert the units for this question. The ratio is all that is important.

142/x = 62/1.69 Cross multiply

142 * 1.69 = 62x combine the left

239.98 = 62x Divide by 62

239.98/62 = x

3.89 kg of P2O5 must be used.

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3 years ago

Which of the following representations shows the correct placement of trophic levels?

OleMash [197]

You have to start listing from the bottom :

3. Secondary Consumers

2. Primary Consumers

1. Producer

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3 years ago

1.00 pint of milk has a volume of how many milliliters

zlopas [31]

I searched it up on Google and I got 473.176 Hope this helps.

3 0

3 years ago

An unknown metal sample has a mass : of 11.29. and a volume of 2 cm3. What is the : density of the unknown metal?

tatuchka [14]

Answer:

$\boxed{\sf Density \ of \ the \ unknown \ metal = 5.645 \ g/cm^3}$

Given:

Mass = 11.29 g

Volume = 2 cm³

To Find:

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Explanation:

Formula:

$\boxed{ \bold{Density = \frac{Mass}{Volume}}}$

Substituting value of mass & volume in the formula:

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3 0

3 years ago

Muszę napisać wzór sumatryczny wysyłam załącznik

ioda

Cześć, nie mówię po polsku, więc zrobiłem to w Tłumaczu Google, więc przepraszam, jeśli coś brzmi śmiesznie.

chlor (VII) i tlen - ten wzór to $CI_{2} O_{7}$ , a tlenek chloru jest bezwodnikiem kwasu nadchlorowego.

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Mam nadzieję, że to pomoże, błogosławionego i cudownego dnia! :-)

-Cutiepatutie

7 0

4 years ago