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givi [52]
3 years ago
15

PLEASE HELP!!!!! I'LL YOU BRAINIEST!!!!

Chemistry
1 answer:
Sidana [21]3 years ago
3 0

Answer:

I believe 11 is B 12 is C 13 is B and 14 is C

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Two chemicals a and b are combined to form a chemical
dedylja [7]
-dB/dt = kAB = k(2B)(B) = 2kB^2
-dB/B^2 = 2kdt
Integrating: 1/B - 1/(B_0) = 2kt
At t = 10, if 15 g of C have formed, this must have consumed 10 g A and 5 g B. The remaining mass of B is 45 g.
1/45 - 1/50 = 2(k)(10)
k = 1.11 x 10^-4
Then substituting this value of k with t = 40:
1/B - 1/50 = 2(1.11 x 10^-4)(40)
1/B - 1/50 = 0.008889
1/B = 0.028889
B = 34.62 g remaining
Therefore, 50 - 34.62 = 15.38 g of B have been consumed.
Doubling, 30.76 g of A have been consumed.
This means that 15.38 + 30.76 = 46.15 g of C have been formed.
5 0
3 years ago
Hydrogen ion secretion leads to bicarbonate ions reabsorption in order to maintain proper blood pH balance. Hydrogen ion secreti
myrzilka [38]

Answer:

True

Explanation:

Carbon dioxide is transported by the blood in the dissolved form. carbonic anhydrase is the enzyme which is a metalloenzyme having zinc at active site converts carbon dioxide into carbonic acid which dissolves in the blood.

Thus,  

H₂O (l) + CO₂ (g) ⇔ H⁺(aq) + HCO₃²⁻(aq)

The kidneys in the body help to control the acid base balance. The hydrogen ion secretion in the body leads to the generation and reabsorption of the bicarbonate ions to form carbon dioxide in order to nullify the effect of the acid generated and thus the pH of the blood is maintained.

6 0
3 years ago
A decomposition reaction is when a substance ____________ down into two or more simpler substances in a chemical reaction.
stiks02 [169]

Apex unfortunately will probably make you get it wrong without adding an "s" into the word break. So if it happens, the answer will be <u>breaks</u>

3 0
3 years ago
After it rains, some water is absorbed deep into the surface and becomes ____________________.
jeka57 [31]

Answer: groundwater

Explanation:

7 0
4 years ago
Read 2 more answers
Using the standard enthalpies of formation, what is the standard enthalpy of reaction?
bulgar [2K]

Answer:

Standard enthalpy for the given reaction is -41.166 kJ

Explanation:

Standard enthalpy of a reaction = \sum [n_{i}\times \Delta H_{f}(product)_{i}]-\sum [n_{j}\times \Delta H_{f}(reactant)_{j}]

where n_{i} and n_{j} are number of moles of i-th product and j-th reactant in balanced reaction respectively.

Hence Standard enthalpy for the given reaction = [(1\times \Delta H_{f}(CO_{2})_{g})]+[(1\times \Delta H_{f}(H_{2})_{g})]-[(1\times \Delta H_{f}(CO)_{g})]-[(1\times \Delta H_{f}(H_{2}O)_{g})]

So, Standard enthalpy for the given reaction = [(1\times -393.509]+[(1\times 0]-[(1\times -110.525]-[(1\times -241.818]kJ = -41.166 kJ

8 0
4 years ago
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