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3 years ago

Assume that the variables x and y are inversely related. If k = 18, what is the value of y for each of the following points?

Chemistry

2 answers:

charle [14.2K]3 years ago

8 0

Answer:

The values of Y are: 18, 9, 6, 3, 2, 1

Explanation:

It is given that X and Y are inversely related. This can be depicted mathematically as:

$X \alpha \frac{1}{Y}$

i.e. as X increases the value of Y is expected to decrease.

(or) $X =k* \frac{1}{Y}$

where k = proportionality constant which is given as 18

In terms of Y, the above equation becomes:

$Y =k* \frac{1}{X}$

Based on the above equation the table can be filled as :

X Y K

1 18 18

2 9 18

3 6 18

6 3 18

9 2 18

18 1 18

kogti [31]3 years ago

4 0

6_____18 record your data to be used in the following problem.

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Sergio039 [100]

Answer: New pressure inside the flask would be 148.8 kPa.

Explanation: The combined gas law equation is given by:

$PV=nRT$

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So, the relation between pressure and number of moles becomes

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4 years ago

Read 2 more answers

How many moles are in a 12.0 g sample of NiC12

Nady [450]

Answer:

0.17 moles

Explanation:

In the elements of the periodic table, the atomic mass = molar mass. Ex: Atomic mass of Carbon is 12.01 amu which means molar mass of Carbon is also 12.01g/mol.

In order to find the # of moles in a 12 g sample of NiC-12, we will need to multiply the number of each atom by its molar mass and then add the masses of both Nickel and C-12 found in the periodic table:

Molar Mass of Ni (Nickel): 58.69 g/mol

Molar Mass of C (Carbon): 12.01 g/mol

Since there's just one atom of both Carbon and Nickel, we just add up the masses to find the molar mass of the whole compound of NiC-12.

58.69 g/mol of Nickel + 12.01 g/mol of Carbon = 70.7 g/mol of NiC-12

There's 12g of NiC-12, which is less than the molar mass of NiC-12, so the number of moles should be less than 1. In order to find the # of moles in NiC-12, we need to do some dimensional analysis:

12g NiC-12 (1 mol of NiC-12/70.7g NiC-12) = 0.17 mol of NiC-12
The grams cancel, leaving us with moles of NiC-12, so the answer is 0.17 moles of NiC-12 in a 12 g sample.

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