## %Mass Composition

Claire Lo 3C
Posts: 55
Joined: Sat Aug 17, 2019 12:18 am

### %Mass Composition

If we're asked to calculate the %mass composition of a compound, how many sig figs should we keep?

Ashley Kim 3F
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

### Re: %Mass Composition

The number of sig figs depends on the lowest sig fig of the numbers give in the problem. However, if the problem does not mention any numbers that you can base your sig figs on, I think it's safe to have at least 4 sig figs.

Matthew Tsai 2H
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

### Re: %Mass Composition

The same rules for significant figures should still apply, and generally that would be anywhere from 4-5 sig figs based on what's given in the problem.

xenamclean_1G
Posts: 51
Joined: Sat Jul 20, 2019 12:15 am

### Re: %Mass Composition

It depends on the problem and the lowest number of sig figs in the original problem. Usually, it is around 4 to 5 sig figs.

Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

### Re: %Mass Composition

It depends on the number with the lowest significant figures in this case(division). It probably will be 4 or 5 significant figures.

lasarro
Posts: 55
Joined: Thu Jul 11, 2019 12:15 am

### Re: %Mass Composition

The sig figs are determined by the numbers provided in the initial problem. I.e. if a problem included 2.15 then your answer would be 3 sig figs.

Kyle Thorin
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

### Re: %Mass Composition

The first thing you should do is look at the question. It is important that you use the least number of sig figs presented in the question.

Juana Abana 1G
Posts: 100
Joined: Wed Sep 18, 2019 12:15 am

### Re: %Mass Composition

The number of sig figs depends on the lowest number that they give you in the problem.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

### Re: %Mass Composition

Yeah I agree with the previous few answers, look at number that has the least amount of significant figures in the problem, but usually it is just four or five sig figs.

AGaeta_2C
Posts: 112
Joined: Wed Sep 18, 2019 12:21 am

### Re: %Mass Composition

The number of sig figs you keep always depends on the lowest amount of sig figs used in the question. For ex., if the question uses the numbers 7.0g, 3g,and 0.003004g, your answer should use one sig fig, because its dependent on 3g.

CalvinTNguyen2D
Posts: 102
Joined: Thu Jul 25, 2019 12:16 am

### Re: %Mass Composition

If there's no specification, I tend to round to 4 sig figs to keep it relatively precise and accurate; if there are sig figs listed or given in the problem, then just follow those standard conventions!

Mai V 4L
Posts: 111
Joined: Fri Sep 28, 2018 12:23 am

### Re: %Mass Composition

Does anyone have a video they think is a good reference for this topic?

Mai V 4L
Posts: 111
Joined: Fri Sep 28, 2018 12:23 am

### Re: %Mass Composition

Does anyone have a video they think is a good reference for this topic? also why is it not letting me post )-: