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3 years ago

The level of closeness between a measured quantity and the actual or standard value is called __________.

Chemistry

1 answer:

Ad libitum [116K]3 years ago

7 0

Answer:

accuracy

Explanation:

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How is the way scientist use the word theory different from the way people use it in there everday language

weqwewe [10]

Answer:

Because Scientists Uses hypothesis and try tests and try proving their points while regular normal people use it to just state a statement

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3 years ago

If ammonia were formed from dalton's simplest formula of one atom of each element, what would he have concluded about the relati

baherus [9]

He would have concluded that the order of operations would be different. This therefore would affect the periodic table's order.

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3 years ago

Use the Henderson-Hasselbalch equation, eq. (3), to calculate the pH expected for a buffer solution prepared from this acid and

notka56 [123]

Answer:

$pH=4.56$

Explanation:

Hello there!

In this case, given the Henderson-Hasselbach equation, it is possible for us to compute the pH by firstly computing the concentration of the acid and the conjugate base; for this purpose we assume that the volume of the total solution is 0.025 L and the molar mass of the sodium base is 234 - 1 + 23 = 256 g/mol as one H is replaced by the Na:

$n_{acid}=\frac{0.2g}{234g/mol}=0.000855mol\\\\n_{base}= \frac{0.2g}{256g/mol}=0.000781mol$

And the concentrations are:

$[acid]=0.000855mol/0.025L=0.0342M$

$[base]=0.000781mol/0.025L=0.0312M$

Then, considering that the Ka of this acid is 2.5x10⁻⁵, we obtain for the pH:

$pH=-log(2.5x10^{-5})+log(\frac{0.0312M}{0.0342M} )\\\\pH=4.60-0.04\\\\pH=4.56$

Best regards!

6 0

3 years ago

What is the velocity of a wave traveling north with a frequency of 75 hertz and a wavelength of

Vanyuwa [196]

Answer:

v = 450 m/s

Explanation:

Given data:

Frequency = 75 Hz

Wavelength = 6 m

Velocity = ?

Solution:

Velocity is the product of frequency and wavelength.

v = f × λ

v = 75 Hz × 6 m

Hz = s⁻¹

v = 75 s⁻¹ × 6 m

v = 450 m/s

3 0

3 years ago

Question 4

Dmitrij [34]

It is going to be D hope this helps

8 0

3 years ago