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2 years ago

I. Three different representations of glucose are given below. Identify each type of model.

Chemistry

1 answer:

Free_Kalibri [48]2 years ago

7 0

Answer:

Ball and stick model is 3D and has the atoms depicted as different Coloured balls Conected to each other by "sticks"

fischer projection has the atoms on the side coming out of the plane, the atoms at the ends going behind (going away from you)

bond line notation Is the most common it does not show the C or H bonds but instead carbons are represented by the bends

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2C3H6O + 8O2 --> 6CO2 + 6H2O

grigory [225]

Answer: 0.45 moles of $H_2O$ will be produced from 0.15 moles of propanol.

Explanation:

The balanced chemical reaction is:

$2C_3H_6O+8O_2\rightarrow 6CO_2+6H_2O$

$C_3H_6O$ is the limiting reagent as it limits the formation of product and $O_2$ is the excess reagent.

According to stoichiometry :

2 moles of $C_3H_6O$ produces = 6 moles of $H_2O$

Thus 0.15 moles of $V$ will produce= $\frac{6}{2}\times 0.15=0.45moles$ of $H_2O$

Thus 0.45 moles of $H_2O$ will be produced from 0.15 moles of propanol.

7 0

3 years ago

When adding sugar to tea, it was observed that the sugar kept dissolving. After a

a_sh-v [17]

The molecule of mixture cannot be seen hence, it will be considered as homogeneous mixture.

<h3>What is molecule?</h3>

A molecule is just a collection of more than two atoms bound together by chemical bonds; depending on the context, the phrase doesn't have to include ions that meet this requirement.

<h3>What is homogeneous mixture?</h3>

Solids, liquids, as well as gases, can all be homogeneous mixtures. Through, they have almost the same look and chemical makeup.

When sugar will be dissolved, the sucrose molecules get separated from one another. The materials that make up individual molecules stay together like sucrose molecules sucrose molecules, so the molecule will not break up.

Therefore mixture can be considered as molecule and homogeneous mixture.

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6 0

2 years ago

Read 2 more answers

4. A 0.100 M solution of NaOH is used to titrate an HCl solution of unknown concentration. To neutralize the solution, an averag

PtichkaEL [24]

Answer:

C. 0.191 M

Explanation:

Our goal for this question, is to calculate the concentration of the HCl solution. For this, in the experiment, a solution of NaOH was used to find the moles of HCl. Therefore, our first step is to know the <u>reaction between HCl and NaOH</u>:

$HCl~+~NaOH~->~NaCl~+~H_2O$

The "<u>titrant"</u> in this case is the NaOH solution. If we know the concentration of NaOH (0.100M) and the volume of NaOH (38.2 mL=0.0382 L), we can calculate the moles using the <u>molarity equation</u>:

$M=\frac{mol}{L}$

$0.100~M=\frac{mol}{0.0382~L}$

$mol=0.100~M*0.0382~L=0.0382~mol~of~NaOH$

Now, in the reaction, we have a <u>1:1 molar ratio</u> between HCl and NaOH (1 mol of HCl is consumed for each mole of NaOH added). Therefore we will have the same amount of moles of HCl in the solution:

$0.0382~mol~of~NaOH\frac{1~mol~HCl}{1~mol~NaOH}=0.0382~mol~HCl$

If we want to calculate the molarity of the HCl solution we have to <u>divide by the litters</u> of HCl used in the experiment (20 mL= 0.02 L):

$\frac{0.0382~mol~HCl}{0.02~L}~=~0.191~M$

The concentration of the HCl solution is 0.191 M

I hope it helps!

8 0

3 years ago

Somebody help please I'm really confused about the whole question.

zysi [14]

A 10.0g
ok hope this helps

5 0

3 years ago

What causes heartburn? How do antacids work to relieve heartburn? What are the key

Sophie [7]

Answer:

<h3>Antacids use a combination of calcium, magnesium, and aluminum salts as their active ingredients. These medications work by neutralizing the acid in the stomach. They also inhibit pepsin , which is an enzyme that plays a role in protein digestion.</h3>

Hope this answer helps

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7 0

3 years ago