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Tom [10]
3 years ago
11

Define "mole in chemistry terms

Chemistry
2 answers:
Vlada [557]3 years ago
4 0

Answer: A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Mashutka [201]3 years ago
3 0

Answer:

Can you please post a pictah.

Explanation:

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Do the number of protons in an atom of an element always equals its atomic weight.
Elenna [48]
No. The number of a protons is not equal to it's atomic weight, instead it is equal to the 'atomic number'
5 0
3 years ago
FECl3+3NaOH=Fe(OH)3+NaCl
Mariana [72]
E. Double Replacement

The OH replaces the Cl, and the Cl replaces the OH
3 0
2 years ago
Given BH3, O3, CO2, and NH3, which of these compound is an exception to the octet rules?
butalik [34]

Answer:

a. BH₃

Explanation:

According to the octet rules, atoms reach stability when are surrounded by eight electrons in their valence shell when they combine to form a chemical compound.

From the options, the only compound in which the central atom does not meet the octet rules is BH₃. The central atom is boron (B), which has 3 electrons in its valence shell. When B is combined with hydrogen (H), 3 electrons from the 3 atoms of H are added. <em>The total amount of electrons is 6</em>, <em>fewer than 8 electrons</em> needed to meet the rule.

4 0
2 years ago
Aluminum reacts with chlorine gas to form aluminum chloride. 2al(s)+3cl2(g)→2alcl3(s) what minimum volume of chlorine gas (at 29
Stolb23 [73]
The balanced chemical reaction is expressed as:

<span>2Al(s)+3Cl2(g)→2AlCl3(s)

To determine the volume of chlorine gas needed given the mass of aluminum metal to be used, we need to calculate for the moles of chlorine needed and use a relation that relates moles and volume by assuming the gas to be an ideal gas. We use the equation PV =nRT. We calculate as follows:

7.85 g Al ( 1 mol / 26.98 g ) ( 3 mol Cl2 / 2 mol Al ) = 0.43643 mol Cl2

PV = nRT
V = nRT / P
V = 0.43643 (0.08205) (298) / (225/760)
V = 36.04 L chlorine gas

The minimum volume needed would be 36.04 L.</span>
8 0
3 years ago
Consider the balanced equation below. 8H2 + S8 mc006-1.jpg 8H2S Based on the mole ratios, what can most likely be predicted? 1 m
Ainat [17]

Answer: 8 moles of hydrogen reacts with 1 mole of sulfur.

Explanation: We are given a balanced chemical equation:

8H_2+S_8\rightarrow 8H_2S

By Stoichiometry, it is said that

8 moles of Hydrogen gas reacts with 1 mole of sulfur to produce 8 moles of hydrogen sulfide.

Mole ratio of reactants = Hydrogen : Sulfur = 8 : 1

8 0
2 years ago
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