# Two elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with he law of multiple proportions. If the formula of the second compound is RQ, what is the formula of the first compound?

Thanks.

R + Q = R?Q?
14 &nbsp 3

R + Q = RQ
7&nbsp &nbsp 4.5

The Law of multiple proportions says that when two elements form a series of compounds (such as R and Q above), the ratio of Q per 1g R in compound 1 to Q per 1g R in compoound 2 will be small whole numbers. You can show this by the following.
Compound 1. 3g Q/14g R = 0.214g Q/1g R
Compound 2. 4.5g Q/7g R = 0.643g Q/1g R

Now take the ratio of the amounts of Q/ 1 g R and we have 0.214/0.643 = 1/3 and 1:3 is the ratio of small whole numbers for Q between compounds 1 and 2. You can do the same thing by using 1 g Q as the base and calculating the ratio between the amounts of R between compounds 1 and 2. I will leave that for you to do. The first one will be 14g R/3g Q = ?? etc.

As for the formula, if the second one is RQ, then we look at the ratio. Copying from above,
R + Q = R?Q?
14 &nbsp 3

R + Q = RQ
7&nbsp &nbsp 4.5

R14/7Q3/4.5 =
R2Q0.666 =
R2/0.666Q0.666/0.666 =
R3Q1 =
R3Q
Check my thinking. Check my arithmetic.
I hope this helps.

9 months ago

## Well, I must say, this chemistry question really fits the equation! It's like a compound of R and Q coming together to form a humorous reaction.

Now, let me clown around with the numbers a bit. We have 14g of R combining with 3g of Q in the first compound, and 7g of R combining with 4.5g of Q in the second compound.

If we take the ratio of Q per 1g of R in compound 1, we get 3g Q/14g R, which simplifies to 0.214g Q/1g R.

In compound 2, the ratio of Q per 1g of R is 4.5g Q/7g R, which simplifies to 0.643g Q/1g R.

Now, if we divide these two ratios, we get 0.214/0.643, which simplifies to approximately 0.333.

Ah, this seems like a small whole number ratio to me. Could it be 1:3? Looks like the law of multiple proportions is working its magical chemistry!

As for the formula, since the second compound is RQ, the ratio of R to Q is 3:1. So, the formula of the first compound would be RRQ. It's like a double-dose of R before adding Q to the mix.

So, there you have it! The law of multiple proportions is happy with the data, and we've solved the formula mystery. Chemistry can be quite entertaining when you add a little humor to it!

9 months ago

## To determine if the data is in accord with the law of multiple proportions, we need to compare the ratios of the elements in the compounds. Let's calculate the ratios for both compounds:

Compound 1:
Ratio of Q to 1 g R = (3.00 g Q / 14.0 g R) â‰ˆ 0.214 g Q / 1 g R

Compound 2:
Ratio of Q to 1 g R = (4.50 g Q / 7.00 g R) â‰ˆ 0.643 g Q / 1 g R

Now, let's compare the ratios. We can see that the ratio in compound 2 is approximately three times larger than the ratio in compound 1.

This confirms that the data is in accord with the law of multiple proportions, as the ratio of Q to R in compound 2 is a small whole number multiple of the ratio in compound 1.

Since the formula of the second compound is RQ, we can determine the formula of the first compound by dividing the subscripts in the ratio of Q to R in compound 2:

RQ: RQ (second compound)
R3Q: RQ (first compound)

Therefore, the formula of the first compound is R3Q.

9 months ago

## The given data is in accordance with the Law of Multiple Proportions, which states that when two elements combine to form different compounds, the ratio of the masses of one element that combine with a fixed mass of the other element can be expressed as small whole numbers.

In the first compound, 14.0 g of R combines with 3.00 g of Q.
In the second compound, 7.00 g of R combines with 4.50 g of Q.

To check if the data follows the Law of Multiple Proportions, we need to calculate the ratios of Q per 1g R in both compounds.

For the first compound:
Q per 1g R = 3.00g Q / 14.0g R = 0.214g Q per 1g R

For the second compound:
Q per 1g R = 4.50g Q / 7.00g R = 0.643g Q per 1g R

Now, we need to check if the ratio Q per 1g R is a small whole number.

Calculating the ratio: (0.214/0.643) â‰ˆ (1/3)

Since the ratio is approximately 1:3, which is a small whole number ratio, the data is in accordance with the Law of Multiple Proportions.

To determine the formula of the first compound, we need to compare the ratios of R in both compounds.

For the first compound:
R per 1g Q = 14.0g R / 3.00g Q â‰ˆ 4.67g R per 1g Q

For the second compound:
R per 1g Q = 7.00g R / 4.50g Q â‰ˆ 1.56g R per 1g Q

Since the ratio R per 1g Q is not a simple whole number ratio, the formula of the first compound cannot be determined with certainty. However, based on the ratio, it can be approximated as R3Q.