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3 years ago

Why is a theory important in science?

Chemistry

2 answers:

Darya [45]3 years ago

8 0

Answer:

a theory can make you figure out more things in science and its a idea that is debated on

Explanation:

UNO [17]3 years ago

3 0

Answer:

Researchers use speculations to create innovations or discover a remedy for an ailment. Some feel that speculations become laws, yet hypotheses and laws have isolated and particular jobs in the logical strategy. A law is a portrayal of a watched marvel in the common world that remain constant each time it is tried.

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A scilentific experiment is repeated, but its results cannot be repeated by others. What can you conclude about the experiment?

klasskru [66]

If the results of the experiment on repeating are not same, it shows the results are not standard, there are some factors, which are not constant

6 0

3 years ago

The student who performed this experiment in the question above wrote the following discussion: "The gas sample is known to cont

Sunny_sXe [5.5K]

Answer:

What was the experimental measurement of the gas?

Explanation:

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3 years ago

An unknown compound with a molar mass of 223.94 g/mol consists of 32.18% c, 4.50% h, and 63.32% cl. find the molecular formula f

Dima020 [189]

The actual number of atoms of each element present in the molecule of the compound is represented by the formula known as molecular formula.

Molar mass of the unknown compound = 223.94 g/mol (given)

Mass of each element present in the unknown compound is determined as:

Mass of carbon, $C$ :

$\frac{32.18}{100}\times 223.94 = 72.06 g$

Mass of hydrogen, $H$ :

$\frac{4.5}{100}\times 223.94 = 10.08 g$

Mass of chlorine, $Cl$ :

$\frac{63.32}{100}\times 223.94 = 141.79 g$

Now, the number of each element in the unknown compound is determined by the formula:

$number of moles = \frac{given mass}{molar mass}$

Number of moles of $C$ :

$number of moles = \frac{72.06}{12} = 6.005 mole\simeq 6 mole$

Number of moles of $H$ :

$number of moles = \frac{10.08}{1} = 10.08 mole\simeq 10 mole$

Number of moles of $Cl$

$number of moles = \frac{141.79}{35.5} = 3.99 mole\simeq 4 mole$

Dividing each mole with the smallest number of mole, to determine the empirical formula:

$C_{\frac{6}{4}}H_{\frac{10}{4}}Cl_{\frac{10}{4}}$

$C_{1.5}H_{2.5}Cl_{1}$

Multiplying with 2 to convert the numbers in formula into a whole number:

So, the empirical formula is $C_{3}H_{5}Cl_{2}$ .

Empirical mass = $12\times 3+1\times 5+2\times 35.5 = 112 g/mol$

In order to determine the molecular formula:

n = $\frac{molar mass}{empirical mass}$

n = $\frac{223.94}{112} = 1.99 \simeq 2$

So, the molecular formula is:

$2\times C_{3}H_{5}Cl_{2} = C_{6}H_{10}Cl_{4}$

6 0

3 years ago

How many nitrogen atoms are there in one formula unit of nh4no3?

telo118 [61]

Answer:

2Atoms

Explanation:

in $NH_{4}NO_{3}$

There exist 2 atoms of nitrogen, 4 atoms of hydrogen and three atoms of oxygen. so the answer is 2atoms

6 0

3 years ago

The measure of the attraction that an atom has for electrons involved in chemical bonds is known as:

Mariana [72]

Electronegativity is the tendency of atom to attract shared pair of electron towards itself . Its value is out of 4 , and Fluorine is higly electronegative.
So,
D electronegativity, is the correct answer.

7 0

3 years ago