Suppose you wanted to dissolve 106 g of Na2CO3 in enough H2O to make 6.00 L of solution.(1) What is the molar mass of Na2CO3? (2) What is the molarity of this solution?
Answers
The molarity of the solution is the ratio of moles of solute to the volume of the solution in L. The molar mass of sodium carbonate is 106 g/mol and molarity is 0.167 M.
What is molar mass?
Molar mass is the mass of the compound that is given by the addition of the atomic mass of the individual atom present in the compound with respect to their stoichiometry coefficients.
The molar mass (M) of sodium carbonate can be given as,
Here mass of sodium = 23, carbon = 12 and oxygen = 16
Substituting values of the atomic mass we get:
Hence, the molar mass of sodium carbonate is 106 g/mol.
Now molarity of sodium carbonate can be estimated as:
Therefore, 106 g/mol is the molar mass and 0.16 M is the molarity of sodium carbonate.
Learn more about molar mass and molarity here:
=2(23)+12+3(16)
=46+12+48
=106 g/mol
the molar mass of Na2CO3 is 106 g/mol
m=106g M=106 g/mol n=m/M
n=m/M n=106/106 n=1mol
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A. Stomach
B. Cook
C. Organ
D. Food
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Answer:
The correct answer is A. Stomach
Explanation:
The prefix gastro- is derived from the Greek word gastrós or gaster wich means stomach, the organ responsible for digestion of food. The most common examples are:
- Gastrointestinal: related to stomach and intestines
- Gastritis: inflammation of the stomach
- Gastroenteritis: inflammation of both stomach and intestines
A combining form with the meaning "stomach," is often used to create compound words, such as gastrology. Here the root word gastro means Stomach. The correct option is A.
The stomach is a muscular bag-like organ that is located on the left side of the upper abdomen. The esophageal sphincter, a valve, is used by the oesophagus to transfer food to the stomach. Acid and digestive enzymes are produced in the stomach to aid in meal digestion.
Storing and digesting the food and liquid consumed during meals is the stomach's main job. In order to aid in the digestion of food and other external items like germs, it creates hydrochloric acid and enzymes.
Thus the correct option is A.
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b. hazardous
c. domestic
Answers
Answer: Option (b) is the correct answer.
Explanation:
When a substance is used and thrown away which can lead to damage in the environment as it may [produce some toxic or hazardous gases is known as a hazardous waste.
These wastes can be solid, liquid or gaseous.
For example, batteries, kerosene, garden chemicals etc are all hazardous waste.
A domestic waste is a waste thrown by a household which may include paper, vegetable waste, cardboard, yard clippings etc.
Thus, we can conclude that hazardous wastes are solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive.
b. Fusion in small stars
c. Fusion in very large stars
d. Supernova
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b. Absolute temperature (T)
c. Specific heat (c)
d. Entropy (S)
e. Kinetic energy (KE)
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Answer: a contest in which you are eliminated if you fail to spell a word correctly.