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3 years ago

14

How many atoms of which elements are represented by the following formula? C6H12N

1 answer:

Tasya [4]3 years ago

8 0

Answer:

19 atoms

Explanation:

6 carbon, 12 hydrogen, one Nitrogen

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When a neutral atom becomes a negatively charged ion, or anion, the atom __________ electrons. a gains b loses c has no change i

faust18 [17]

Gain .....
It loses electron when a positive charge is formed..ex Na+

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3 years ago

What is the significance of enzymes in maintaining homeostasis in living organisms ?

GalinKa [24]

Enzymes are needed for metabolic pathways in the body, respiration, digestion and other important life processes. When enzymes function properly, homeostasis is maintained. However, if an enzyme is lacking or has an incorrect shape due to genetic mutation, this can lead to disease within an organism.

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3 years ago

A chemical reaction in which two or more substances undergo a chemical union to form a more complex substance is a _______ react

Georgia [21]

I believe the correct answer is B. Combination.

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3 years ago

Read 2 more answers

Consider the reaction:

murzikaleks [220]

<u>Answer:</u> The formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of oxygen gas = 83 g

Molar mass of oxygen gas = 32 g/mol

Putting values in above equation, we get:

$\text{Moles of oxygen gas}=\frac{83g}{32g/mol}=2.594mol$

For the given chemical equation:

$2Fe_2O_3\rightarrow 4Fe+3O_2;\Delta H^o_{rxn}=+824.2kJ$

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

By Stoichiometry of the reaction:

When 3 moles of oxygen gas is formed, the amount of heat absorbed is 824.2 kJ

So, when 2.594 moles of oxygen gas is formed, the amount of heat absorbed will be = $\frac{824.2kJ}{3mol}\times 2.59mol=713kJ$

Hence, the formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

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3 years ago

The isotopes of an element all have the same __(atomic, mass) __number, but they have different __(atomic,mass)__numbers.

Vlad1618 [11]

<h2>The isotopes of an element all have the same __(atomic, mass) __number, but they have different __(atomic,mass)__numbers.</h2>

Explanation:

The isotopes of an element all have the same __atomic number __, but they have different __mass __numbers.

The isotopes have same atomic number that is :

Same number of electrons
Same number of protons
same electronic configuration
same valence electrons
same valency
same symbol

The isotopes have different mass number that is :

They differ in number of neutrons .

For example : Isotopes of hydrogen are : H₁¹ , H₁² , H₁³

isotopes of Oxygen is : O¹⁶ , O¹⁷, O¹⁸

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3 years ago