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julia-pushkina [17]
3 years ago
14

Why do astronauts, miners, divers and mountaineers carry oxygen cylinders with them?

Chemistry
1 answer:
emmainna [20.7K]3 years ago
6 0
So they can breathe because us humans need oxygen
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Why does the nitrogen concentration decrease after hydrogen is added? n2(g)+3h2(g)⇌2nh3(g) why does the nitrogen concentration d
Leno4ka [110]

<span>The chemical reaction of a reversible reaction is actually governed by Le Chatelier’s principle. It states that when more reactants are introduced into the system, the reaction will proceed forward to create more products. So since Hydrogen is a reactant and Nitrogen is also reactant so adding more Hydrogen makes more products hence reducing the Nitrogen concentration.</span>

3 0
3 years ago
Calcium reacts with oxygen to form calcium oxide. Name the<br> reactants.
LUCKY_DIMON [66]
CaO
Calcium reacts with oxygen to form calcium oxide. The chemical equation for this reaction is Ca + O2 → CaO.
7 0
3 years ago
Which of the following elements in the third period would you expect to have the most negative electron affinity value, and why?
Sliva [168]

Answer:- Chlorine(Cl)

Explanations:- Electron affinity is the amount of energy released when an electron is added to an element in it's gaseous state. Electron affinity increases in a period on going left to right as the size of the element decreases and it's effective nuclear charge increases and this facilitate an element to accept the electron.

The elements mentioned here in the question belongs to the same group and out of these, chlorine is on the right most side and so it is correct choice.

Hence, Chlorine(Cl), because it is a halogen with a high effective nuclear charge is the correct choice.

4 0
4 years ago
Read 2 more answers
What is common to all elements in the same group on the periodic table
marin [14]
They all have the same number of electrons.
3 0
3 years ago
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What is the mass of a glucose solution that fills a 0.500-L intravenous bottle if the density of the glucose solution is
____ [38]

Answer:

m = 575 g

Explanation:

Given data:

Volume of solution = 0.500 L (0.500×1000 = 500 mL)

Density of glucose solution = 1.15 g/mL

Mass of glucose solution = ?

Solution:

Formula:

d = m/v

d = density

m = mass

v = velocity

Now we will put the values in formula.

1.15 g/mL = m/500 mL

m = 1.15 g/mL × 500 mL

m = 575 g

3 0
4 years ago
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