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2 years ago

Where do properties of matter come from?

Chemistry

1 answer:

Korolek [52]2 years ago

8 0

Answer:

Extensive or inextinsive and either physical or chemical

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How many moles are in 7950 g of CO2? ( pleas show calculation)

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Answer:

Calculate the number of moles of CO2 by the formula n=PV/RT, where P is the pressure from Step 3, V is the volume from Step 2, T is the temperature from Step 1 and R is a proportionality constant equal to 0.0821 L atm / K mol.

Explanation:

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3 years ago

Chemically combined substances, such as CO2, NH3, and H20 are called.....

Alex787 [66]

It is d. compounds because they have more than one element.

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Plate is in the process of splitting into two tectonic plates

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3 years ago

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Calculate the percent ionization of nitrous acid in a solution that is 0.249 M in nitrous acid. The acid dissociation constant o

sattari [20]

Answer:

4.26 %

Explanation:

There is some info missing. I think this is the original question.

<em>Calculate the percent ionization of nitrous acid in a solution that is 0.249 M in nitrous acid. The acid dissociation constant of nitrous acid is 4.50 × 10 ⁻⁴.</em>

<em />

Step 1: Given data

Initial concentration of the acid (Ca): 0.249 M

Acid dissociation constant (Ka): 4.50 × 10 ⁻⁴

Step 2: Write the ionization reaction for nitrous acid

HNO₂(aq) ⇒ H⁺(aq) + NO₂⁻(aq)

Step 3: Calculate the concentration of nitrite in the equilibrium ([A⁻])

We will use the following expression.

$[A^{-} ] = \sqrt{Ca \times Ka } = \sqrt{0.249 \times 4.50 \times 10^{-4} } = 0.0106 M$

Step 4: Calculate the percent ionization of nitrous acid

We will use the following expression.

$\alpha = \frac{[A^{-} ]}{[HA]} \times 100\% = \frac{0.0106M}{0.249} \times 100\% = 4.26\%$

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3 years ago

What does it mean if you titrated the acid to a 'hot pink' color All of these

Murrr4er [49]

Answer: Too much base was added

i guessed

Explanation:

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3 years ago