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3 years ago

A barometer can track the activity of storms at different altitudes. true of false

Chemistry

2 answers:

Bogdan [553]3 years ago

8 0

Its all the way round true 99.9% sure because they launch baometers up in the air and it reflects off of the satalght

Mazyrski [523]3 years ago

7 0

The answer is false i just took the quiz on edg.

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12. The vapor pressure of water at 90°C is 0.692 atm. What is the vapor pressure (in atm) of a solution made by dissolving 3.68

luda_lava [24]

Answer : The vapor pressure (in atm) of a solution is, 0.679 atm

Explanation : Given,

Mass of $H_2O$ = 1.00 kg = 1000 g

Moles of $CsF$ = 3.68 mole

Molar mass of $H_2O$ = 18 g/mole

Vapor pressure of water = 0.692 atm

First we have to calculate the moles of $H_2O$ .

$\text{Moles of }H_2O=\frac{\text{Mass of }H_2O}{\text{Molar mass of }H_2O}=\frac{1000g}{18g/mole}=55.55mole$

Now we have to calculate the mole fraction of $H_2O$

$\text{Mole fraction of }H_2O=\frac{\text{Moles of }H_2O}{\text{Moles of }H_2O+\text{Moles of }CsF}=\frac{55.55}{55.55+3.68}=0.938$

Now we have to partial pressure of solution.

According to the Raoult's law,

$P_{Solution}=X_{H_2O}\times P^o_{H_2O}$

where,

$P_{Solution}$ = vapor pressure of solution

$P^o_{H_2O}$ = vapor pressure of water = 0.692 atm

$X_{H_2O}$ = mole fraction of water = 0.938

$P_{Solution}=X_{H_2O}\times P^o_{H_2O}$

$P_{Solution}=0.938\times 0.692atm$

$P_{Solution}=0.649atm$

Therefore, the vapor pressure (in atm) of a solution is, 0.679 atm

5 0

2 years ago

How many grams of sodium chloride are required to make a 1.0 L solution with a concentration of 3.5 M?

Alex777 [14]

A 1 molar solution is the molecular weight in grams in 1 litre of water, so a 3.5 molar solution would be 58.44g multiplied by 3.5, which is 204.54g in 1L

5 0

3 years ago

In order for substances to dissolve in water, the substances should be bonded by: ionic bonds only covalent bonds only either io

SashulF [63]

I think that it would be <span>either ionic bonds or covalent bonds</span>

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3 years ago

The diagram below shows the main parts of the respiratory system.

Tems11 [23]

Answer:

pharynx > larynx>trachea> bronchi>alveoli (so B)

Explanation:

nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)

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2 years ago

An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the te

Misha Larkins [42]

mass of mg = 0.035g

calculated R value is less

percentage error = 71.91%

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3 years ago