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sergeinik [125]
2 years ago
13

2)A relatively unreactive metal that is yellow colored.

Chemistry
1 answer:
Vlad1618 [11]2 years ago
3 0

I think we're in the same class lol

1. Sodium

2. Gold

3.  Helium

4. Sulfur

5. Magnesium

6. Cesium.

7. Silicon

8. fluorine

9. Nickel

10. Magnesium

11. Tungsten

12. hydrogen

13. Calcium

I did my best, here's my answers. Enjoy.

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Which scientists is credited with developing the firdt scientific atomic theory
ratelena [41]

<em>Answer: </em>John Dalton

Explanation: Democritus was a Greek philosopher (470-380 B.C.) who is the father of modern atomic thought. He proposed that matter could NOT be divided into smaller pieces forever. John Dalton created the very first atomic theory.

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Why amorphous solids are called super cooled liquids?
qwelly [4]
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Look at this balanced chemical reaction: N2 + 3H2 2NH3
stepladder [879]

Answer: A mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

Explanation:

Given: Volume = 450 L

Temperature = 450 K

Pressure = 300 atm

Using ideal gas equation, moles of nitrogen are calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = tempertaure

Substitute values into the above formula as follows.

PV = nRT\\300 atm \times 450 L = n \times 0.0821 L atm/mol K \times 450 K\\n = \frac{135000}{36.945}\\= 3654.08 mol

According to the given equation, 1 mole of nitrogen forms 2 moles of ammonia. So, moles of ammonia formed by 3654.08 moles of nitrogen is as follows.

2 \times 3654.08 mol\\= 7308.16 mol

As moles is the mass of substance divided by its molar mass. So, mass of ammonia (molar mass = 17.03 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\7308.16 = \frac{mass}{17.03 g/mol}\\mass = 124457.96 g

Thus, we can conclude that a mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

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3 years ago
which has more calories : table sugar or aspartame ? what does synthetic gas (water gas) consist of ?
Dmitriy789 [7]

Answer:

1: table sugar has more calories

2: Hydrogen and carbon monoxide and smaller quantities of methane, carbon dioxide, and hydrocarbons

Explanation:

Give brainliest

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