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Usimov [2.4K]
3 years ago
8

Please help with this chem problem

Chemistry
1 answer:
Alenkasestr [34]3 years ago
6 0

Okay , so on Google this question will pop up if you look up minimilizing conduction explain.

Explanation:

p

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A sample of an unknown metal has a mass of 120.4 g. As the sample cools from 90.5°C to 25.7°C, it releases 7020 J of energy. Usi
Dafna1 [17]

Answer:

Explanation:

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6 0
2 years ago
Human blood typically contains 1.04 kg/L of platelets. A 1.89 pints of blood would contain what mass (in grams) of platelets
Fynjy0 [20]

Answer:

The correct answer is 930 grams platelets.

Explanation:

The volume of blood given is 1.89 pints. Total number of gallons in 1.89 pints is,  

= 1.89/8 = 0.236 gallon

1 gallon comprise = 3.785 L

So, 0.236 gallon comprise = 0.236 * 3.785 L = 0.89 L

As mentioned that 1 Liter of blood comprise 1.04 kilograms of platelets. Therefore, 0.89 L of blood will contain = 1.04 * 0.89 = 0.93 Kg platelets

1 Kg contain 1000 grams. So, number of platelets in grams will be,  

= 1000 * 0.93 = 930 grams platelets.  

3 0
3 years ago
How much heat is required to change the temperature of 100 grams of water from 25 to 55oc?
marysya [2.9K]
Hthe heat required  to change the temperfature  of 100 grams of water  from 25 to 55 c is calculated as below

Q(heat) = M(mass) x C(specific heat capacity) x delta T(change  in temperature)

M= 100 grams
C= 4.18 j/g/c
delta T= 55-25 =30c

Q=100 g x4.814 j/g/c x  30c = 12552  joules
5 0
3 years ago
Mendeleev's periodic table of elements was created in 1901.<br> O A. True<br> O B. False
LiRa [457]
B. False
It was created in 1869
3 0
3 years ago
Why should we not throw water in petrol fire
kaheart [24]
~Hello there! ^_^

Your question: Why should we not throw water in petrol fire..?

Your answer: We should not throw water in the petrol fire because oil, petrol etc are a bit weightless than water so it continues to flow over the water.

Hope this helps!


5 0
3 years ago
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