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beks73 [17]
2 years ago
13

Need help with these two, solve only the ones you can though :D

Chemistry
1 answer:
ad-work [718]2 years ago
7 0

Answer: 27 is A and 28 is C.

Explanation: I’ll explain 28 but not 27 because that’s just definitions.

In CuSO4 there is a Cu, an S, and 4 O molecules. Add them up you get 6.

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A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree
lions [1.4K]

Answer:

The new temperature of the water bath 32.0°C.

Explanation:

Mass of water in water bath ,m= 8.10 kg = 8100 g ( 1kg = 1000g)

Initial temperature of the water = T_1=33.9^oC=33.9+273K=306.9 K

Final temperature of the water = T_2

Specific heat capacity of water under these conditions =  c = 4.18 J/gK

Amount of energy lost by water = -Q = -69.0 kJ = -69.0 × 1000 J

( 1kJ=1000 J)

Q=m\times c\times \Delta T=m\times c\times (T_2-T_1)

-69.0\times 1000 J=8100 g\times 4.18 J/g K\times (T_2-306.9 K)

-69,000.0 J=8100 g\times 4.18 J/g K\times (T_2-306.9 K)

T_2=304.86 K=304.86 -273^oC=31.86^oC\approx 32.0^oC

The new temperature of the water bath 32.0°C.

5 0
3 years ago
In which of the following is the symbol for the ion and the number of electrons it contains given correctly?
tensa zangetsu [6.8K]
The answer is A. .....
4 0
3 years ago
Compared to an endocrine response a nerve response differs in that the nerve response generally.
Nadusha1986 [10]

the nerve response is generally faster

Explanation:

nerves travel throughout neurotransmitters which is a faster response, like a reflex, than the hormones in the endocrine system, like the growth hormone.

7 0
3 years ago
Which of the following statements is true of enzymes A. They're unusable after a reaction B. They don't provide an active site f
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D. They act on a specific type of substrate in a reaction

Hope this helps!
3 0
3 years ago
Read 2 more answers
Please help! USATestprep K12
NeX [460]

Answer:

its none above

Explanation:

food webs have arrows that show the flow of energy from one orhganism to the next

bar graphs have bars and numbers and diagrams have words and pictures so it D

8 0
2 years ago
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