In the titration of acetic acid, CH3COOH, a 0.20 M solution of NaOH is used. A volume of 15.00 mL of CH3COOH solution is

How many moles are there in 24.00 g of NaCl

Elis [28]

Answer:

The answer to your question is 0.41 moles

Explanation:

Data

moles of NaCl = ?

mass of NaCl = 24 g

Process

To solve this problem just calculate the molar mass of NaCl, and remember that the molar mass of any substance equals to 1 mol.

1.- Calculate the molar mass

NaCl = 23 + 35.5 = 58.5 g

2.- Use proportions and cross multiplication

58.5 g of NaCl ------------------- 1 mol

24.0 g ------------------- x

x = (24 x 1) / 58.5

x = 0.41 moles

6 0

3 years ago

The starting molecule for the krebs cycle is

Delicious77 [7]

Answer:

acetyl CoA

Explanation:

The starting molecule for the krebs cycle is acetyl CoA.

3 0

3 years ago

Which of the statements are true? Triacylglycerols (triglycerides) are carboxylic acids. Fats that contain more unsaturated fatt

astraxan [27]

<h2>The correct answer is given below:</h2>

Explanation:

Fats or lipid can be defined as high energy containing organic macro-molecules.
The basic molecule which makes up fat or lipid is Triacylglycerol.
A Triacylglcerol molecule is made up of one molecule of glycerol attached to three fatty acids molecules.
Here, the carboxylic acid groups of three fatty acid molecules are attached with the help of ester bonds to the three hydroxyl groups of one glycerol molecule.
Fatty acids are of two types, Saturated and Unsaturated.
Saturated fatty acid molecules can be defined as those in which the carbon atoms forming the hydrocarbon chain of the fatty acid molecule are linked to each other by single covalent bonds. The structure of saturated fatty acid molecule is linear or straight.
Unsaturated fatty acid molecules can be defined as those in which there are presence of one or multiple double covalent bonds in between the carbon atoms forming the hydrocarbon chain of the fatty acid molecule.
These double bonds in unsaturated fatty acid molecules form kinks or bend in the structure of the fatty acid .
In lipid or fat, the fatty acid molecules associate with each other by hydrophobic or Van der Waals forces of interactions.
In saturated fat, due to the linear structure of the fatty acids, the fatty acid molecules associate close to each other thereby forming a compact fat molecule with high melting point. This causes them become solidified at room temperature.
In unsaturated fat, the presence of kinks or bends in the fatty acid molecules results in the generation of fat molecules whose structure is not compact due to the presence of spaces in between the fatty acid molecules. These fats have a lower melting point which causes them to be liquid at room temperature.
The first statement is FALSE as triacylglycerols are formed by the esterification of three molecules of fatty acids with one molecule of glycerol.
The second statement is TRUE as unsaturated fatty acids have lower melting point than saturated fatty acids.
The third statement is FALSE as saturated fats have higher melting point than unsaturated fats.
The fourth statement is TRUE as triacylglycerols are formed by the esterification of three molecules of fatty acids with one molecule of glycerol.
The fifth statement is TRUE as unsaturated fats have lower melting point and so they are liquid at room temperature.

7 0

3 years ago

cual es el calor especifico de una sustancia cuya masa es de 7 gramos, si absorbe 180 calorias para pasar de 10 grados celsius a

VladimirAG [237]

What is the specific heat of a substance whose mass is 7 grams, if it absorbs 180 calories to go from 10 degrees Celsius to 85 degrees Celsius

Answer:

0.343cal/g°C

Explanation:

Given parameters:

Mass of substance = 7g

Quantity of heat absorbed = 180calories

Initial temperature = 10°C

Final temperature = 85°C

Unknown:

Specific heat of the substance = ?

Solution:

To solve this problem, the specific heat of a substance is the amount of heat needed to raise the temperature of a unit mass of that substance by 1°C.

Mathematically;

C = $\frac{Q}{m (T_{2} - T_{1} )}$

C is the specific heat

Q is the amount of heat

m is the mass

T is the temperature

1 and 2 are the initial and final states

Now, insert the parameters and solve;

C = $\frac{180}{7 (85 - 10)}$ = 0.343cal/g°C

7 0

3 years ago

To determine the formula mass of a compound you should?

kaheart [24]

Answer: A compound is a substance made up of a definite proportion of two or more elements. A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.

Explanation: there is no explanation i copied it off of google

:)

3 0

3 years ago