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3 years ago

11

For the most effective hot pack, should the Temperature change be positive or negative ?

1 answer:

bazaltina [42]3 years ago

3 0

Answer:

Positive

Explanation:

For the most effective hot pack, the temperature change should be <u>positive</u>.

<em>Hot packs are generally utilized for their heat-producing abilities. Hence, the reactions leading to the activation of hot packs are usually exothermic, that is, heat energy generating. In other words, positive or increased temperatures must be generated when hot packs are activated.</em>

This is unlike cold packs which are utilized for the cold-generating abilities. Reactions leading to their activations must be endothermic, that is, heat-absorbing.

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Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

Ipatiy [6.2K]

Answer:

The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

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Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

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Percentage of hydrogen in estradiol :

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y = 24.2 ≈ 24

Percentage of oxygen in estradiol :

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The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

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