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3 years ago

Lodine is a solid non metal, what is one property of lodine?

1 answer:

4 0

Nonmetals, on the right side of the periodic table, are very different from metals. Their surface is dull and they don't conduct heat and electricity.

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Xi needs to stay awake another hour to study for his English final, so he drinks several cups of cola. When he's done studying,

AnnZ [28]

Answer:

The correct answer is a. sugar

Explanation:

Even though caffeine is also known for uprising the energy levels to a point where it could cause insomnia, the excess of sugar usually causes an increase in heart rate and insomnia. Also, coca-cola has a bigger amount of sugar than caffeine, so it explains how these high quantities could affect Xi's health.

4 0

3 years ago

How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

$2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)$

$\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]$

= $2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]$

$= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]$

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

In this question, the enthalpy of formation has positive value and hence the reaction is endothermic in which the heat is released.

3 0

3 years ago

Where does industrial waste come from?

Schach [20]

Hello

your answer to this response is

Industrial waste. Industrial waste is the waste produced by industrial activity which includes any material that is rendered useless during a manufacturing process such as that of factories, industries, mills, and mining operations. It has existed since the start of the Industrial Revolution.

I hope this helsp you out

have a great morning

FaithRawlins14

6 0

3 years ago

How does progesterone play a role in a Feedback Mechanism

Doss [256]

Estrogen is involved in a feedback mechanism associated with the follicular phase of menstruation.

4 0

3 years ago

These unspecialized plant cells synthesize and store organic products. These cells are also the site of the plant's metabolic pr

tresset_1 [31]

Parenchyma cells synthesize and store organic products.

4 0

4 years ago