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ladessa [460]
3 years ago
10

If I have 2.4g of magnesium, how many g of oxygen(O2 ) will I need to react completely with the magnesium? 2Mg +O2 → MgO

Chemistry
1 answer:
Jet001 [13]3 years ago
5 0

Explanation:

just trying....hope that helps

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Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon difference in the
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Tonicity (how much salt is in it)
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atomic size of element increasing with increasing in number of shell in the third period of periodic table name the smallest ele
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Argon (Ar) is smallest element in 3rd period in periodic table.

3 0
3 years ago
If the volume of an object increases but the mass stays the same, which will happen to the density?
nikklg [1K]
We all know, Density = Mass/ volume. When volume increases and the mass remains the same , the density will decrease considerably.
5 0
2 years ago
Read 2 more answers
A. The half-life for a first order reaction in 49 minutes. What is the rate constant?B.For a second order reaction, the half-lif
Burka [1]

Answer:

a) 0,014 min⁻¹

b) 1452 seconds.

c) 0,02156 M

d) The faster rate is for the reaction A. The largest rate constant, k, is for A reaction

Explanation:

a) For a first order reaction the half-life is:

t_{1/2} = \frac{ln(2)}{k} <em>(1) </em>As half.life is 49 min. Rate constant -k- is: 0,014 min⁻¹

b) The half-life is defined as the time that takes in descompose the half of the initial concentration of a compound.

As half-life is 726s. In 726s the concentration will be 0,300M, In the next 726s the concentration will be 0,150M. Thus, thae time it takes to decrease concentration until 0,150M is 726s×2= 1452 seconds

c) In the same way, 11072 years are 4 half-life for this reaction, thus:

0,345M/2⁴ = 0,02156 M

d) By definition of half-life, the less half-life, the faster rate. Thus, The faster rate is for the reaction A.

By (1) half-life is inversely proportional to rate constant. Thus, the less half-life, the largest rate constant. The largest rate constant, k, is for A reaction

I hope it helps!

7 0
3 years ago
How many dots would go around xenon in electron dot diagram
ratelena [41]

Answer:

8

Explanation:

Since Xe (xenon) is a noble gas, it has 8 valence electrons. It's outer shell is full and it is a stable element and doesn't like to react. Therefore, since the electron dot diagram is about valence electrons, 8 would be your answer.

4 0
3 years ago
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