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kirill [66]
2 years ago
5

Please help me on this question

Chemistry
1 answer:
Goshia [24]2 years ago
8 0
The answer to your question is 9.60.
You might be interested in
A metamorphic rock can melt or weather and erode? True or false
Degger [83]

Answer:

Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth's surface breaks down rocks into small and smaller pieces. ... If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma).

Explanation:

NOT MY WORDS! I HOPE THIS HELPS THO!

6 0
3 years ago
For the reaction, a → b, the rate constant is 0.0208 m-1 sec-1. How long would it take for [a] to decrease from 0.100 to 0.0450
goldfiish [28.3K]

First, assume the order of the given reaction is n, then the rate of reaction i.e. \frac{dx}{dt}=k\times[A]^{n}

where, dx is change in concentration of A in small time interval dt and k is rate constant.

According to units of rate constant, the reaction is of second order.

\frac{1}{[A]_{t}}-\frac{1}{[A]_{o}} = kt   (second order formula)

Put the values,

\frac{1}{0.04590 m}-\frac{1}{0.100 m} =0.0208 m^{-1}s^{-1} \times t  

 22.23 m -10 m =0.0208 m^{-1}s^{-1} \times t

\frac{12.23 m}{0.0208 m^{-1}s^{-1}} = t

t= 587.9 s

Hence, time taken is 587.9 s






5 0
4 years ago
How many moles are there in 270.4 g sample of NaOH
pochemuha

Answer:

6.5

Explanation:

No of moles is the ratio of reacting mass to molar mass

RM - 270.4g

MM - 23+16+1= 40g/mol

270.4/40= 6.76mol

3 0
4 years ago
A mixture containing initially 3.90 mole of NO(g) and 0.88 mole of CO2(g) was allowed to react in a flask of volume 1.00 L at a
Ymorist [56]

Answer:

Equilibrium constant Kc for the reaction will be 1.722

Explanation:

O2(g)+NO(g)→CO(g)+ NO2(g)

0.88    3.9        ---         ---

0.88x   3.9-x     x           x

GIVEN:

0.88X-X= 0.11

⇒ X=0.77

CO2(g)+NO(g) → CO(g) + NO2(g)

0.88       3.9         ---          ---

0.88-x    3.9-x      x            x

=              3.13       0.77      0.77

=0.11

Kc = \frac{[CO] *[NO2]} {[CO2]*[NO]}

     ={{0.77}×0.77÷{{0.11×3.13}}

     = 1.722

6 0
4 years ago
Why is it useful to express a number in scientific notation?
hram777 [196]
B- I’m pretty sure. Hope this helps
8 0
3 years ago
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