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1 year ago

Aspirin is one of the Aesthetic Values of biodiversity true false

Chemistry

1 answer:

Trava [24]1 year ago

6 0

Answer:

true

Explanation:

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Be sure to answer all parts. Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everythi

Kazeer [188]

Answer:

Half life = 79.67 sec

Explanation:

Given that:

k = $8.7\times 10^{-3}\ s^{-1}$

The expression for half life is shown below as:-

$t_{1/2}=\frac{\ln2}{k}$

Where, k is rate constant

So,

$t_{1/2}=\frac{\ln2}{8.7\times 10^{-3}\ s^{-1}}$

$t_{1/2}=114.94252\ln \left(2\right)\ sec=79.67\ sec$

Half life = 79.67 sec

6 0

2 years ago

Justin Bleeber is a lazy young man and decides to burn a pile of leaves instead of bagging it. The pile of leaves weighed three

Luden [163]

Its D. Because the rest of the mass turned to gas

3 0

2 years ago

Read 2 more answers

Antimony has 2 naturally occurring isotopes. The mass of antimony-121 is 120.904 amu and the mass of antimony-123 is 122.904 amu

Sav [38]

Wow, now this one is a hard one, took me quite a while to figure it out but here it is:
$120.904(x)+122.904(1-x)=121.76 \\ 
120.904x-122.904x+122.904=121.76 \\ 
-2x+122.904=121.76 \\ 
-2x=-1.144 \\ 
x=.572 \\ 
1-.572=.428$
The abundances of the two isotopes is:
Antimony-121 = 57.2%
Antimony-123 = 42.8%

6 0

2 years ago

What type of silicate mineral is olivine?

Goryan [66]

I´m pretty sure its magnesium iron silicate.

7 0

2 years ago

How many grams are there in 3.30x10 23 grams of n2i6

qwelly [4]

Technically, the answer should be 3.30 * 10^23 grams. But I think you mean either molecules, atoms, moles or grams of Ni2I6 with that number of molecules .

1 mole of Ni2 I6 = 6.02 * 10^23 molecules
x [mole] = 3.30 * 10^23 molecules

1/x = 6.02 * 10^23 / 3.30 * 10^23 Cancel the 10^23 on the right side
1/x = 6.02 / 3.30 Cross multiply
3.30 = 6.02 x Divide by 6.02
3.30 / 6.02 = x
x = 0.548 moles

what to do from here?

1 mole of Ni2I6 is
2 * Ni = 2 * 59 = 118 grams
6 * I = 6 * 131 = 786 grams
Total = 904 grams

Set up a proportion.
1 mole Ni2I6 = 904 grams
0.548 moles = x

1/0.548 = 904/x Cross multiply
x = 0.548 * 904
x = 495.4 grams of Ni2I6 <<<<<< Answer.

8 0

2 years ago