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Olenka [21]
2 years ago
13

Hi!!!!!!!!!!!!!!!!!!!!!!

Chemistry
2 answers:
Naddik [55]2 years ago
5 0

my favrit word is HI!

FinnZ [79.3K]2 years ago
3 0

Answer:

yh

Explanation:

welcome.This place is for learning

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When a saturated solution of NH4Br dissolved in 100 grams of water is cooled from 60°C to 30°C, how much NH4Br will precipitate?
stepladder [879]

Answer:

m_{precipitated}=24.8g

Explanation:

Hello,

In this case, since at 60 °C, 108 grams of ammonium bromide are completely dissolved in 100 grams of water for a saturated solution, once it is cooled to 30 °C, wherein only 83.2 grams are completely dissolved in 100 grams of water, the following mass will precipitate:

m_{precipitated}=108g-83.2g\\\\m_{precipitated}=24.8g

Best regards.

8 0
3 years ago
Standard units of measure for density
Mrrafil [7]

Answer:

g/cm³ for solids,

g/ml for liquids

g/L for gases.

Explanation:

Though SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids and g/L for gases. Mathematically, density is defined as mass divided by volume:   ρ=m/V    

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8 0
3 years ago
Determine the number of moles in 497 grams of the
satela [25.4K]

Answer:

• The actual number of moles of each element in the smallest unit of the compound. •In water (H 2 O), ammonia (NH 3), methane (CH 4), and ionic compounds, the empirical and molecular

Explanation:

5 0
2 years ago
Draw the structural formula for all the alkenes with the indicated molecular formula that, without undergoing a rearrangement, p
enyata [817]

ya got to go get sum to eat then get it

5 0
3 years ago
Substances like neon , which is a gas at room temperature and pressure, can often be liquified or solidified only at very low te
marshall27 [118]

Answer:

Condenses at 27.25K.

Freezes at 24.65K.

Explanation:

In order to solve this above question, there is is need to make use of the following equation. The main idea here is to convert degree celsius to Kelvin. Hence,

0°C + 273.15 = 273.15K---------------------(1).

Therefore, we will make use of the above equation (1) and slot in the values for at degree celsius at which it condenses and at degree celsius at which it freezes.

So, we have at temperature at which it condenses:

-245.9°C + 273.15 = 27.25K.

Also, we have at temperature at which it freezes.

-248.5°C + 273.15 = 24.65K.

8 0
2 years ago
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