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Advocard [28]
3 years ago
11

Which of the following demonstrates that reactants and products are chemically different? Choose all that apply

Chemistry
2 answers:
nataly862011 [7]3 years ago
6 0

Your answers would be k^+1, Cl2 and F-1

Hope this helps. Kinda winged it with my research.

Lorico [155]3 years ago
5 0

It is only two answers so it is K+1 and  F-1

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4. DBearded waste of Co-60 must be stored until it is no longer radioactive. Cobalt-60
Bingel [31]

464 g radioisotope was present when the sample was put in storage

<h3>Further explanation</h3>

Given

Sample waste of Co-60 = 14.5 g

26.5 years in storage

Required

Initial sample

Solution

General formulas used in decay:  

\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}

t = duration of decay  

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Input the value :

\tt 14.5=No.\dfrac{1}{2}^{26.5/5.3}\\\\14.5=No.\dfrac{1}{2}^5\\\\No=\boxed{\bold{464~g}}

8 0
2 years ago
1 Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas.
Alborosie

Answer:  See below

Explanation:

1.  a)  0.15 moles calcium carbonate  (15g/100g/mole)

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Explanation:

d.

h{}^{2} o

3 0
2 years ago
What is the total temperature change between 3km and 7km above earth's surface
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4km I believe is the answer
4 0
3 years ago
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