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3 years ago

What do March 21st and September 21st have in common?

Chemistry

1 answer:

pogonyaev3 years ago

5 0

Answer:

The equinoxes are the only time when both the Northern and Southern Hemispheres experience roughly equal amounts of daytime and nighttime. On Earth, there are two equinoxes every year: one around March 21 and another around September 22.

Explanation:

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Draw the product formed when the Lewis acid (CH3CH2)3C+ reacts with each Lewis base:

AnnZ [28]

Answer:

Explanation:

The concept of Lewis Acid and base was applied in determining the product formed from the reaction of the lewis acid and the lewis base.

According to G.N Lewis - an american who worked and elaborated more on the definition of acids and bases. He defined an acid as an electron pair acceptor and a base as an electron pair donors.

One of the application of lewis theory is in the reaction to test for the presence of copper(ii) ions by the addition of ammonia to form a clear blue solution of tetraammine.

The reactions of the lewis acid to each of the base is as shown in the attached file.

8 0

4 years ago

Can people tell the difference between sugar and aartifiial sweeteners

HACTEHA [7]

1. Sugar refers to easily metabolized carbohydrate; sweetener is an additive that is added to foods for the sweetening effect
2. Sugar in all its forms does not require authentication; sweeteners need to be approved by an accreditation body or the EU
3. Sugar is caloric, while sweeteners can be caloric or non caloric in nature
4. Intensive sweeteners are prepared by synthetic procedure and provide little or no energy whatsoever; sugar substances eliminate the crucial minerals from your diet

http://www.differencebetween.net/object/difference-between-sugar-and-sweetener/

4 0

3 years ago

Consider a perfectly insulated and sealed container. Determine the minimum volume in L of the container such that 0.37 L of wate

Nataly_w [17]

Answer: The minimum volume of the container must be 460.54 L.

Explanation:

Density is defined as the ratio of mass and volume of a substance.

$\text{Density}=\frac{\text{Mass}}{\text{Volume}}
$ ......(1)

Given values:

Volume of water = 0.37 L = 370 mL (Conversion factor: 1 L = 1000 mL)

Density of water = 1.00 g/mL

Putting values in equation 1, we get:

$\text{Mass of water}=(1.00g/mL\times 370mL)=370g$

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(2)

Given mass of water = 370 g

Molar mass of water = 18 g/mol

Putting values in equation 2, we get:

$\text{Moles of water}=\frac{370g}{18g/mol}=20.56mol$

At STP conditions:

1 mole of a gas occupies 22.4 L of volume

Applying unitary method:

20.56 moles of water will occupy = $\frac{22.4L}{1mol}\times 20.56mol=460.54L$ of volume.

Hence, the minimum volume of the container must be 460.54 L.

8 0

3 years ago

A solution was made by mixing 60.5 g of glucose (C6H12O6) with enough water to make 325 ml of solution. What is the percent (mas

IgorC [24]

mass percent concentration = 15.7 %

molar concentration of glucose solution 1.03 M

Explanation:

To calculate the mass percent concentration of the solution we use the following formula:

concentration = (solute mass / solution mass) × 100

solute mass = 60.5 g

solution mass = solute mass + water mass

solution mass = 60.5 + 325 = 385.5 g (I used the assumption that the solution have a density of 1 g/mL)

concentration = (60.5 / 385.5) × 100 = 15.7 %

Now to calculate the molar concentration (molarity) of the solution we use the following formula:

molar concentration = number of moles / volume (L)

number of moles = mass / molecular weight

number of moles of glucose = 60.5 / 180 = 0.336 moles

molar concentration of glucose solution = 0.336 / 0.325 = 1.03 M

Learn more about:

molarity

brainly.com/question/10053901

#learnwithBrainly

5 0

4 years ago

What volume (mL) of the partially neutralized stomach acid was neutralized by NaOH during the titration? (portion of 25.00 mL sa

almond37 [142]

The question is incomplete, here is the complete question:

What volume (mL) of the partially neutralized stomach acid having concentration 2 M was neutralized by 0.1 M NaOH during the titration? (portion of 25.00 mL NaOH sample was used; this was the HCl remaining after the antacid tablet did it's job)

Answer: The volume of HCl neutralized is 1.25 mL

Explanation:

To calculate the volume of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of stomach acid which is HCl

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=1\\M_1=2M\\V_1=?mL\\n_2=1\\M_2=0.1M\\V_2=25mL$

Putting values in above equation, we get:

$1\times 2\times V_1=1\times 0.1\times 25\\\\V_1=\frac{1\times 0.1\times 25}{1\times 2}=1.25mL$

Hence, the volume of HCl neutralized is 1.25 mL

3 0

3 years ago