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frozen [14]
3 years ago
7

If you were to test how much time it takes to melt a piece of ice in warm water, what are

Chemistry
1 answer:
77julia77 [94]3 years ago
8 0
Time, Ice size, water temp
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During a reaction, the enthalpy of the reactants and the products are not equal. What does this result in?
topjm [15]

Answer:c

Explanation:

5 0
3 years ago
The 1H-NMR of a compound with molecular formula C6H12O2 consists of four signals: 1.1 (triplet, integrating to 3 Hydrogens), 1.2
Tamiku [17]

Answer:

Isopropyl propionate  

Explanation:

1. Information from formula

The formula is C₆H₁₂O₂. A six-carbon alkane would have the formula C₆H₁₄. The deficiency of two H atoms indicates the presence of either a ring or a double bond.

2. Information from the spectrum

(a) Triplet-quartet

A 3H triplet and a 2H quartet is the classic pattern for a CH₃CH₂- (ethyl) group

(b) Septet-doublet

A 1H septet and a 6H doublet is the classic pattern for a -CH(CH₃)₂ (isopropyl) group

(c) The rest of the molecule

The ethyl and isopropyl groups together add up to C₇H₁₂.

The rest of the molecule must have the formula CO₂ and one unit of unsaturation. That must be a C=O group.

The compound is either

CH₃CH₂-COO-CH(CH₃)₂ or (CH₃)₂CH-COO-CH₂CH₃.

(d) Well, which is it?

The O atom of the ester function should have the greatest effect on the H atom on the adjacent carbon atom.

The CH of an isopropyl is normally at 1.7. The adjacent O atom should pull it down perhaps 3.2 units to 4.9.  

The CH₂ of an ethyl group is normally at 1.2. The adjacent O atom should pull it down to about 4.4.

We see a signal at 5.0 but none near 4.4. The compound is isopropyl propionate.

3. Summary

My peak assignments are shown in the diagram below.

4 0
3 years ago
What organism is penicillin derived from ?
Anit [1.1K]

Answer: Penicillin G (also called benzylpenicillin) was discovered by accident in 1928. Alexander Fleming, a Scottish physician-scientist was growing a type of bacteria called Staphylococcus Aureus on an uncovered petri dish when it became contaminated with mold spores.

Explanation:

4 0
3 years ago
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Calculate the kilograms of iron that would be produced from 1340 g of calcium carbonate.
Elanso [62]

Answer:

1.340kg

Explanation:

5 0
2 years ago
I NEED HELP ASAP!!!!!!!!!!!<br> WITHIN THE HOUR<br> Thanks
Alex17521 [72]
Its D because

Li = 6
Be =9
C= 12
O=15
6 0
2 years ago
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