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3 years ago

What may have caused these results? accuracy vs precison

Chemistry

1 answer:

Afina-wow [57]3 years ago

7 0

Answer:

Precision and precision are two ways that scientists conceive about mistake. Accuracy refers to how similar a measurement is to an accurate or agreed meaning. Precision refers towards how similar the measurement with the same object is to each other. Precision is separate from precision.

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Can you help me figure out how to determine the Conjugate Acid of Sodium Chloride - NACL ?

mars1129 [50]

Answer:

Explanations:

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1 year ago

Which of the following is the best description of a Chemical equation?

JulsSmile [24]

- A chemical reaction is considered as a process of transformation of chemical reactants into products.

- Chemical reactions involve change in position of electrons or breaking the bonds between atoms to form new molecules. (no change in the elements present).

- Chemical reactions are best described by chemical equations

So the correct answer is B

7 0

3 years ago

Read 2 more answers

One solution has a formula C (n) H (2n) O (n) If this material weighs 288 grams, dissolves in weight 90 grams, the solution will

saw5 [17]

Explanation:

The given data is as follows.

Boiling point of water ( $T^{o}_{b}) = 100^{o}C$ = (100 + 273) K = 323 K,

Boiling point of solution ( $T_{b}) = 101.24^{o}C$ = (101.24 + 273) K = 374.24 K

Hence, change in temperature will be calculated as follows.

$\Delta T_{b} = (T_{b} - T^{o}_{b})$

= 374.24 K - 323 K

= 1.24 K

As molality is defined as the moles of solute present in kg of solvent.

Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

Let molar mass of the solute is x grams.

Therefore, Molality = $\frac{\text{weight of solute \times 1000}}{\text{molar mass of solute \times mass f solvent(g)}}$

m = $\frac{288 g \times 1000}{x g \times 90}$

= $\frac{3200}{x}$

As, $\Delta T_{b} = k_{b} \times molality$

$1.24 = 0.512 ^{o}C/m \times \frac{3200}{x}$

x = $\frac{0.512 ^{o}C/m \times 3200}{1.24}$

= 1321.29 g

This means that the molar mass of the given compound is 1321.29 g.

It is given that molecular formula is $C_{n}H_{2n}O_{n}$ .

As, its empirical formula is $CH_{2}O$ and mass is 30 g/mol. Hence, calculate the value of n as follows.

n = $\frac{\text{Molecular mass}}{\text{Empirical mass}}$

= $\frac{1321.29 g}{30 g/mol}$

= 44 mol

Thus, we can conclude that the formula of given material is $C_{44}H_{88}O_{44}$ .

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3 years ago

Question 4 Unsaved

weqwewe [10]

I think it is eutrophication

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3 years ago

What is a physical change?

vovangra [49]

A physical change is when there is an alteration to the material but does not affect at the molecular level. An example of a physical change would be cutting, crushing, freezing, and boiling a material object.

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3 years ago