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Romashka-Z-Leto [24]
3 years ago
12

What are the two flasks for measuring the liquid volume?

Chemistry
1 answer:
aleksandrvk [35]3 years ago
7 0

Answer:

Liquid volume is usually measured using either a graduated cylinder or a buret.

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Which of the following would exhibit the lowest conductivity?
Marina86 [1]

Answer:

the correct answer is b. Co2...............

6 0
3 years ago
If the atomic mass of 1 oxygen atom is 15.9994 amu, how much mass does of 1 mole oxygen have?​
IrinaK [193]

Answer:

15.9994 amu

Explanation:

By definition 1 mole of any substance is the mass that contains 1 Avogadro's Number of particle. (=> 6.02 x 10²³ particles/mole).

1 mole Oxy => 15.9994 amu => contains 6.02 x 10²³ particles Oxy /mole

1 mole Sulfur => 32.064 amu => contains 6.02 x 10²³ particles Sulfur /mole

1 mole H₂O => 18 amu => contains 6.02 x 10²³ molecules of water / mole.

6 0
3 years ago
I need help on thiss
Sergio039 [100]

The reaction is not balanced

<h3>Further explanation</h3>

Given

Reaction

2Fe(s)+3O₂(g)⇒2Fe₂O₃(s)

Required

The number of atoms

Solution

In a balanced chemical equation, the number of atoms in the compound that reacts (the reactants and products) will have the same number

Reactants : Fe(s)+O₂(g)

Fe = 2 atoms

O = 3 x 2 = 6 atoms

Products : Fe₂O₃(s)

Fe = 2 x 2 = 4 atoms

O = 2 x 3 = 6 atoms

The reaction is not balanced because the number of Fe atoms is not the same

The balanced reaction should be:

4Fe(s)+3O₂(g)⇒2Fe₂O₃(s)

8 0
3 years ago
You are the medical examiner at the scene of a murder at a restaurant. There is a
Hoochie [10]

The compound : C₄₀H₄₄N₄O

<h3>Further explanation</h3>

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

• Determine the mass ratio of the constituent elements of the compound.  

• Determine the mole ratio by dividing the percentage by the atomic mass

The mol ratio of composition : C : H : N : O

\tt \dfrac{80.66}{12}\div \dfrac{7.39}{1}\div \dfrac{9.39}{14}\div \dfrac{2.68}{16}\\\\6.722\div 7.39\div 0.671\div 0.1675\rightarrow divide~by~smallest(0.1675)\\\\40\div 44\div 4\div 1

3 0
3 years ago
The following is what kind of reaction?<br> 2 CH4 +4 02 → 2 CO2 + 4H2O
zepelin [54]

Answer:

<u>It</u><u> </u><u>is</u><u> </u><u>a</u><u> </u><u>combustion</u><u> </u><u>reaction</u><u>.</u>

5 0
3 years ago
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