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3 years ago

Please help urgent !!! How does an instant cold pack get cold so quickly?

Chemistry

2 answers:

strojnjashka [21]3 years ago

4 0

Answer: it has ice in it and that makes the things you use with the cold pack colder

Anon25 [30]3 years ago

3 0

Answer:

When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic reaction. This reaction absorbs heat from the surroundings, quickly lowering the pack's temperature.

Explanation:

Uh, yea.

Have a good day!

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Is 2Zn + 2HCI = ZnCL2 + H2 balanced or unbalanced

riadik2000 [5.3K]

Unbalanced it should be 2Zn+2Hcl=2ZnCl2+H2

7 0

3 years ago

When is a hurricane nears land, causes the most damage?

xeze [42]

A hurricane will weaken after making landfall.

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3 years ago

Molecules in 2 moles of carbon dioxide<br>

Maksim231197 [3]

Answer:

HAVE A NICE DAY OK

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2 years ago

The C=C bond in 2-cyclohexenone produces an unusually strong signal. Explain using resonance structuresBased on the above resona

frosja888 [35]

Answer:

When two single single bonds separated by a double bond (e.g C=C-C=C or C=C-C=O in the case of 2-cyclohexenone), the effect of resonance among those there bonds will be observed.

Explanation:

Since the Oxygen atom has higher electronegativity, it will cause the electrons in the resonance bonds 'flow' toward the Oxygen atom, so that the C=C will 'lose' some electron. The signal read for that bond will be different from other alkene structure.

Attachment is the resonance structure of 2-cyclohexene.

8 0

3 years ago

Hemoglobin is the protein that transports oxygen in mammals. Different species of mammals have slightly different forms of hemog

Anna35 [415]

Answer;

= 64561.95 g/mole

Explanation;

mass of Fe in 100g = .346g

= .346 / 55.8452 moles

= 0.0061957 moles

These represent 4 moles of Fe in the molecule so moles of hemaglobin

= 0.0061957/4

= 0.0015489 moles

these are in 100 g so mass of 1 mole = 100 / 0.0015489

= 64561.95 g / mole

molar mass of hemoglobin = 64561.95 g/mole

6 0

3 years ago