![subject](/tpl/images/cats/mat.png)
Mathematics, 20.01.2020 07:31 angelina0miles
Air is about 78% nitrogen gas (n2) by mass. the molar mass of nitrogen gas is 28.0 g/mol. a 100.0-g sample of air contains how many moles of nitrogen?
2.8
3.6
28
78
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 14:10
What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:00
You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:00
Percent increase and decrease. original number: 45 new number: 18
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 02:10
What is 4(x2 – 3x) + 12x2 + x simplified? f 4x2–3x h 16x2–11x g13x2–2x i16x2–12x
Answers: 1
You know the right answer?
Air is about 78% nitrogen gas (n2) by mass. the molar mass of nitrogen gas is 28.0 g/mol. a 100.0-g...
Questions
![question](/tpl/images/cats/User.png)
SAT, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/biologiya.png)
Biology, 04.02.2021 22:10
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 04.02.2021 22:10
![question](/tpl/images/cats/istoriya.png)
History, 04.02.2021 22:10
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/en.png)
English, 04.02.2021 22:10
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 04.02.2021 22:10
![question](/tpl/images/cats/himiya.png)
Chemistry, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 04.02.2021 22:10