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alexandr402 [8]
3 years ago
9

Lithium and oxygen only exist in nature as Diatomic Molecules. True or False

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer:

Explanation:

True

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You have 0.21 moles of Al how many atoms do you have
ZanzabumX [31]

Number of atoms : 1.26 x 10²³

<h3>Further explanation  </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

0.21 moles of Al, so n = 0.21

Number of atoms :

\tt N=0.21\times 6.02\times 10^{23}\\\\N=1.26\times 10^{23}

8 0
2 years ago
A 0.288 g sample of an unknown monoprotic acid is dissolved in water and titrated with a 0.115 M NaOH solution. After the additi
Sholpan [36]

Answer:

74.0 g/mol

Explanation:

Step 1: Write the generic neutralization reaction

HA + NaOH ⇒ NaA + H₂O

Step 2: Calculate the reacting moles of NaOH

At the equivalence point, 33.83 mL of 0.115 M NaOH react.

0.03383 L × 0.115 mol/L = 3.89 × 10⁻³ mol

Step 3: Calculate the moles of HA that completely react with 3.89 × 10⁻³ moles of NaOH

The molar ratio of HA to NaOH is 1:1. The reacting moles of HA is 1/1 × 3.89 × 10⁻³ mol = 3.89 × 10⁻³ mol.

Step 4: Calculate the molar mass of the acid

3.89 × 10⁻³ moles of HA have a mass of 0.288 g.

M = 0.288 g / 3.89 × 10⁻³ mol = 74.0 g/mol

4 0
3 years ago
When aluminum is mixed with iron ii oxide iron metal and aluminum oxide?
Alexandra [31]
Are produced along with a large quantitu of heat
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3 years ago
COCI2 has an effusion rate of 0.00172 m/sec. Which of the gases below would have an effusion rate of 0.00323 m/sec?
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CO por qué si y punto, chao
8 0
2 years ago
Which Florida law requires owners and operators of motor vehicles to be financially responsible for damages and/or injuries they
s344n2d4d5 [400]

The answer in the given sentence above is the financial responsibility law as this law provides operators and owners to be held liable of the damages that they had provided or injuries that has proven to be their fault and they would likely provide financial support or payment to those affected.

3 0
3 years ago
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