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Ostrovityanka [42]

2 years ago

9

Which statement best describes what makes a base weak? A base is weak when it forms few ions in water. A base is weak when only

a little of it is dissolved in water. A base is weak when its concentration is high. A base is weak when it totally forms ions in water.

1 answer:

mina [271]2 years ago

3 0

Answer:

A base is weak when only a little of it is dissolved in water

Explanation:

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What made alchemy unscientific in its practices?

anzhelika [568]

(B) because it couldn’t turn in to good

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Which of the following is an example of chemical energy being released or stored?

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Answer:

C

Explanation:

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2 years ago

If a 2.50 liter container is filled with Ne gas at a pressure of 650 mm Hg and at 25°C, what mass of Ne is in the container?

seraphim [82]

Answer:

1.76 g is the mass of Ne is in the container.

Explanation:

We use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 650 mm Hg

V = Volume of the gas = 2.50 L

T = Temperature of the gas = $25^oC=[25+273]K=298K$

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

n = number of moles of Ne gas = ?

Putting values in above equation, we get:

$650mmHg\times 2.50L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 298K\\\\n=\frac{650\times 2.50}{62.3637\times 298}=0.0874mol$

Also, molar mass of Ne = 20.1797 g/mol

So, $Mass = Moles\times Molar\ mass = 0.0874\times 20.1797 g = 1.76\ g$

<u>1.76 g is the mass of Ne is in the container.</u>

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3 years ago

What electron configuration represents Nitrogen? A. 2,2 B. 2,8,4 C. 2,4 D. 2,5

Anastaziya [24]

Answer:

D. 2:5

Explanation:

It has 5 valency electrons

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3 years ago