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3 years ago

Give the symbols of the ions formed when sodium reacts with chlorine

Chemistry

1 answer:

Mademuasel [1]3 years ago

3 0

Answer:

When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable.

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Calculate the percent yield if 52.9 g of ethanol reacts to produce 26.7 g of ether.

blagie [28]

Answer:

The % yield is 62.7 %

Explanation:

Step 1: the balanced equation

2CH3CH2OH(l) → CH3CH2OCH2CH3(l) + H2O(l)

Step 2: Data given

mass of ethanol = 52.9 grams

molar mass of ethanol = 46.07 g/mol

mass of ether = 26.7 grams

Molar mass of ether = 74.12 g/mol

Step 3: Calculate moles of ethanol

Number of moles = Mass / molar mass

Moles of ethanol = 52.9 grams / 46.07 g/mol

Moles of ethanol = 1.15 moles

Step 4: Calculate moles of ether

For 2 moles of ethanol consumed, we have 1 mole of ether produced

For 1.15 moles of ethanol consumed, we have 1.15/2 = 0.575 moles of ether produced

Step 5: Calculate mass of ether

Mass = moles * Molar mass

Mass ether = 0.575 moles * 74.12 g/mol = 42.62 grams = theoretical yield

Step 6: Calculate % yield

% yield = (26.7 / 42.62) * 100 = 62.7%

The % yield is 62.7 %

6 0

4 years ago

Compared with warm fronts cold fronts are?

liubo4ka [24]

A weather front or front is a narrow region between two air masses of different densities. Because of the difference in density between warm and cold front, cold air tends to go underneath the warmer air. It often creates the strongest winds above the ground surface. This is caused due to the heat and mass transfer between particles of air. They can be slowed down by the presence of mountains and valleys. Cold air moves fast and the temperature around it can be felt as if you are blown away due to its density. Whereas warm air moves slowly.

6 0

3 years ago

The density of silver is 10.49 g/mL. If a sample of pure silver has a volume of 12.993 mL, what is the mass of the silver?

r-ruslan [8.4K]

Answer:

see the pic for more detail

4 0

3 years ago

Which of the following best describes an alkali?

julia-pushkina [17]

Answer:

A. Any substance with a pH above 7.

Explanation:

On the pH scale substances whose value is greater than 7 and less than 14 are termed alkali.

Acids have a pH of less than 7 whereas neutral compounds such as water has pH of 7.

An alkali is any substance that produces excess hydroxyl ion in solutions.
Water soluble bases are known as alkali.
They are usually certain metallic oxides, metallic hydroxides and aqueous ammonia.

7 0

3 years ago

Read 2 more answers

Hamood backwards is hamood

ad-work [718]

Answer:

ano po yung sinasabi nyo

5 0

3 years ago

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