CHEMISTRY HIGH SCHOOL

How many moles of NaCl are present in 23.5 grams of NaCl?

Answers

Answer 1

Answer:

Answer:

0.342 mol

Explanation:

Molar mass of

NaCl = 58.4 g/mol

Number of moles in

20.0 g NaCl

20.0

58.4

/mol

0.342 mol

Related Questions

When a substance changes from one phase to another, which of the following occurs?
The movement of organisms into a range is called A. immigration. B. emigration. C. population shift. D. carrying capacity.
The depictions of ionic compounds do not show distinct compound units but rather a collection of ions in the ratio given by the formula. Explain how the drawing of NaCl both illustrates that the compound exists as a large collection of ions and that the ratio of sodium ions to chloride ions is 1-to-1 as indicated by the formula NaCl.
One way to slow down global climate change is toА use less nonrenewable resources. B use more nonrenewable resources. с drive cars that only burn fossil fuels. D use less dangerous ways to find oil.
“Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C.” What topic is the teacher most likely talking about?

10. A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature of the gas is raised to 235 degrees kelvin, what is the new pressure of the gas? (Assume that there''s no change in volume.)A. 1.702 kPa
B. 3.636 kPa
C. 854.46 kPa
D. 510 kPa

Answers

Answer : (C) 854.46 KPa.

Solution : Given,

Initial pressure = 400 KPa

Initial temperature = 110 K

Final temperature = 235 K

According to the Gay-Lussac's law, the absolute pressure is directly proportional to the absolute temperature at constant volume of an ideal gas.

P ∝ T

Formula used :

$(P_(1))/(P_(2))=(T_(1))/(T_(2))$

where,

$P_(1)$ = initial pressure

$P_(2)$ = final pressure

$T_(1)$ = initial temperature

$T_(2)$ = final temperature

Now put all the values in above formula, we get

$(400)/(P_(2))=(110)/(235)$

By rearranging the terms, we get the value of new/final pressure.

$P_(2)$ = 854.5454 KPa $\approx$ 854.55 KPa

Given that N and V are constants:

$P=(NRT)/(V)\n(400)=(8.31)(110)(N)/(V)\n400=914.59(N)/(V)\n(400)/(914.59)=(N)/(V)\n\nP=(8.31)(235)(N)/(V)\nP=(1953.90)(400)/(914.59)\nP=854.55\n854.55=about~854.46$

C. 854.46 kPa

Which ion is the only negative ion present in an aqueous solution of an Arrhenius base?(1) hydride ion (3) hydronium ion
(2) hydrogen ion (4) hydroxide ion

Answers

The correct answer is option 4. It is the hydroxide ions that is produced by an Arrhenius base in water. According to Arrhenius, acid-base reactions are characterized by acids which forms hydronium ions in water and bases which dissociates in aqueous solution to form hydroxide ions.

Which of the following best describes supersaturation?A
Water droplets begin to fall back to Earth from clouds.
B
Water vapor transfers back to water droplets or ice crystals.
Small particles form and bump into each other to form clouds.
D
The sun turns water into water vapor as it heats Earth's surface.

Answers

Answer:

B. Water vapor transfers back to water droplets or ice crystals.

Explanation:

Its What I know ehe sorry in advance if its wrong :))

What is the structure of beeswax that contains 16 carbon of carboxylic acid and 30 carbon of alcohol?

Answers

Answer:

Tricontanyl palmitate: CH₃-(CH₂)₂₉-O-CO-(CH₂)₁₄-CH₃

Explanation:

Beeswax is a tough natural wax which is produced by the worker honey bees. The beeswax is an ester of the long chain fatty acids and alcohols. One of the major components of beeswax is tricontanyl palmitate.

Tricontanyl palmitate is a wax ester that is composed of 16-carbon fatty acid and a 30-carbon alcohol, joined by an ester linkage.

The molecular structure of tricontanyl palmitate is:

CH₃-(CH₂)₂₉-O-CO-(CH₂)₁₄-CH₃

This is the answer hope this helps

a habitat must include all of the following except a. food sources. b. favorable conditions for reproduction. c. more than one population of a given species. d. adequate shelter and/or protection.

Answers

Answer: c. More than one population of a given species.

Explanation:

A habitat is a place or location which provide shelter and other necessary resources desired for survival.

Among the options given more than one population of a given species is correct option. This is because of the fact that if more than one population of species exists there will be competition for resources among the members this will lead to the decline in number of individuals in the populations.

A habitat must include all of the following except C. More than one population of a given species.

Na+ + Cl– NaCl Which statement best describes the relationship between the substances in the equation?

Answers

Answer : The number of sodium ions is equal to the number of formula units of salt.

Explanation : In the given reaction of NaCl the statement which describes it the best is that the number of sodium ions is found to be same along with the formula units in the product side.

$Na^(+)$ + $Cl^(-)$ ----> NaCl.

Its clear from the equation that one mole of Na and one mole of Cl combines together to give the product, which is one mole of NaCl. The number of ions on both the sides are equal.

The correct answer for the question that is being presented above is this one: "The number of sodium ions is equal to the number of formula units of salt." The statement that best describes the relationship between the substances in the equation is that the number of sodium ions is equal to the number of formula units of salt.

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