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PolarNik [594]
3 years ago
6

What mass of nitrogen is required to react with 16 grams of oxygen?

Chemistry
1 answer:
damaskus [11]3 years ago
8 0

Answer:

14g

Explanation:

N2 + 2O2 => 2 NO2

Molar mass of O2 = 32g/mol

No of mol= 16/32 = 0.5 mol

2 moles of Oxygen react with 1 mol of N2

1 mol of oxygen react with X mol of N2

X = 0.5mol

Molar mass of N2 = 28g/mol

No of mol = mass/molar mass

Mass = 0.5 × 28 = 14g.

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A 90 lb person is prescribed a drug in the amount of 50mg/kg body per day to be delivered in 2 doses per day. Each tablet contai
geniusboy [140]

Answer:

4 tabletes/dose

Explanation:

mass person = (90 Lb)×(Kg/2.20462 Lb) = 40.823 Kg body

amount of medicine = 50 mg/Kg body.day

frecuency = 2 dose/day

⇒ amount of medicine/day =  (50 mg/kg body.day)×(40.823 Kg body) = 2041.168 mg/day

⇒ mg medicine/dose = (20141.168 mg/day)×(day/ 2 dose) = 1020.584 mg medicine/dose

∴ mg medicine/tablet = 250 mg medicine/tablet

⇒ # tabletes/dose = (1020.584 mg medicine/dose)×(tablet/250 mg medicine) = 4.082 tabletes/dose

⇒ # tabletes/dose ≅ 4 tabletes/dose

7 0
3 years ago
In a certain chemical reaction, 2 solid Mg atoms bond with O2 gas to produce solid
soldier1979 [14.2K]

Answer:

Option B. 2Mg(s) + O2 (g) —> 2MgO (s)

Explanation:

From the question given above,

We were told that:

2 solid Mg atoms bond with O2 gas to produce solid MgO.

This can be represented by an equation as follow:

2Mg(s) + O2 (g) —> MgO (s)

Next, we shall balance the above equation as follow:

2Mg(s) + O2 (g) —> MgO (s)

There are 2 atoms of Mg on the left side and 1 atom on the right side. It can be balance by putting 2 in front of MgO as shown below:

2Mg(s) + O2 (g) —> 2MgO (s)

Now, the equation is balanced.

8 0
3 years ago
Raising or lowering temperature. What happens to the pressure? Is this a direct or indirect relationship?
Dahasolnce [82]

Answer:

sorry I didn't understand this question

4 0
3 years ago
9. Which of these substances have a higher specific heat, and why?
bulgar [2K]

Answer:

C

Explanation:

water has the highest specific heat capacity of any liquid,as a hydrogen bond

8 0
3 years ago
Options:
Inessa [10]

Answer:

saturated fats

Explanation:

bcoz it is solid at room temperature and does not have double bonds between carbons

8 0
3 years ago
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