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saw5 [17]
4 years ago
12

True or False: Helium gas will effuse more rapidly than carbon monoxide gas.

Chemistry
1 answer:
yulyashka [42]4 years ago
6 0

Answer:

true

Explanation:

The lighter a gas is, the faster it will effuse; the heavier a gas is, the slower it will effuse. Of all the choices, helium (He) has the lowest molecular weight (atomic weight in this case), so it will have the highest rate of effusion.

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What is the osmotic pressure of a .25 M solution of NaCl at 25 degrees Celsius?
Ilya [14]

Answer:

6.113 atm

Explanation:

Data provided in the question:

Molarity of the solution = 0.25 M

Temperature, T = 25° C = 25 + 273 = 298 K

Now,

Osmotic pressure (π) is given as:

π = MRT

where,

M is the molarity of the solution

R is the ideal gas constant = 0.082057 L atm mol⁻¹K⁻¹

on substituting the respective values, we get

π = 0.25 × 0.082057 × 298

or

π = 6.113 atm

3 0
3 years ago
How many atoms of oxygen are represented in 2Fe(NO3)2? ( My answer: C) Correct?
astra-53 [7]

How many atoms of oxygen are represented in 2Fe(NO3)2?

Answer: 12

3 0
4 years ago
What are the 8 properties of matter
SIZIF [17.4K]

color (intensive)

density (intensive)

volume (extensive)

mass (extensive)

boiling point (intensive): the temperature at which a substance boils.

melting point (intensive): the temperature at which a substance melts.



5 0
4 years ago
How many mols are in 15 of mg (0H) 2
SpyIntel [72]
The answer is 0.0171468704904. We assume you are converting between moles Mg(OH)2 and gram. This compound is also known as Magnesium Hydroxide. 1 mole<span> is equal to </span>1 moles<span> Mg(OH)2, or 58.31968 grams.</span>
5 0
3 years ago
What is the density of a substance that contains 850 milligrams for every mL? Express your answer in grams per cm³.
Temka [501]

The density  of substance that contain  850 milligrams  for every  Ml  is  

0.85 g/Cm³


    calculation

<em>  </em><em>step 1:</em><em>convert   850 Mg  to g</em>

<em>that is 1  mg=0.001 g</em>

<em>         850 mg =? g</em>

<em>= (850 mg   x  0.001  g)/ 1 mg=0.85 g</em>


<em>step 2:  convert  Ml  to  Cm³</em>

<em>            that is 1  Ml =  1 cm³</em>


<em>therefore density  =</em><em> 0.85 g/Cm³</em>

4 0
3 years ago
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