Answers
We are given:
Mass of NaCl in the given solution = 22.3 grams
Volume of the given solution = 2 L
Number of Moles of NaCl:
We know that the number of moles = Given mass / Molar mass
Number of moles = 22.3 / 58.44 = 0.382 moles
Molarity of NaCl in the Given solution:
We know that Molarity of a solution = Moles of Solute / Volume of Solution(in L)
Molarity = 0.382 / 2
Molarity = 0.191 M
Related Questions
Is the law of conservative mass observed in this equation CaCO3 + 2HCI -->CaCI2 +H2O + CO2
Consider the following reaction: Pb(NO3)2(aq) + 2 NaCl(aq) → PbCl2(s) + 2 NaNO3(aq)If you react an excess of Pb(NO3)2with 26.3 g of NaCl, and you isolate 52.1 g of PbCl2, what is your percent yield?
A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth? a. 0.154 L b. 6.50 L c. 0.615 L d. 1.63 L d. None of the above
The amount of order in an isolated system cannot increase; it may only stay the same or decrease. This expresses which of the following?Conservation of massThe First Law of ThermodynamicsThe second Law of ThermodynamicsKinetic TheoryThe definition of workthe definition of heat
O B. CO2 + H2O → H2CO3
O C. NaOH + HCl → NaCl + H20
O D. C2H4 + Cl2 → C2H4Cl2
Answers
The chemical equation 2 C₂H₂ +5 O₂ + 4 CO₂ + 2 H₂O is the equation which represents the combustion of a hydrocarbon.
What is a chemical equation?
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
#SPJ5
Answer:
a
Explanation:
Answers
Answer:
M
Explanation:
Henry's law relational the partial pressure and the concentration of a gas, which is its solubility. So, at the sea level, the total pressure of the air is 1 atm, and the partial pressure of O2 is 0.21 atm. So 21% of the air is O2.
Partial pressure = Henry's constant x molar concentration
0.21 = Hx1.38x
H =
H = 152.17 atm/M
For a pressure of 665 torr, knowing that 1 atm = 760 torr, so 665 tor = 0.875 atm, the ar concentration is the same, so 21% is O2, and the partial pressure of O2 must be:
P = 0.21*0.875 = 0.1837 atm
Then, the molar concentration [O2], will be:
P = Hx[O2]
0.1837 = 152.17x[O2]
[O2] = 0.1837/15.17
[O2] = M
Final answer:
The molar concentration of O2 in the surface water of a mountain lake at 20 °C and an atmospheric pressure of 665 torr is approximately 1.21×10-3 M.
Explanation:
To calculate the molar concentration of O2 in the surface water of a mountain lake using Henry's law, we first need to understand how pressure affects the solubility of gases and vice versa.
As per Henry's law, at a constant temperature, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. The partial pressure of O2 in air at sea level is 0.21 atm. This means that when the atmospheric pressure is 1 atm, the molar concentration of O2 is 1.38×10−3 M. At higher altitudes, the atmospheric pressure reduces. The given atmospheric pressure at the mountain lake is 665 torr, which is approximately 0.875 atm.
Using these values in Henry's law, the molar concentration of O2 can be calculated as:
C = P * x
where C is molar concentration, P is atmospheric pressure, and x is given solubility at 1 atm. Substituting the values:
C = (0.875 atm) * (1.38×10−3 M) = 1.21x10-3 M approximately
Learn more about Henry's Law here:
#SPJ12
Answers
Answer:
Explanation:
Hydrogen has 1 proton and one nuetron
Oxygen has 8 protons nad 8 neutrons
Answers
Answer:
two monosaccharides join by dehydration synthesis
Explanation:
A disaccharide is formed when two monomers join together by a loss of water molecule.
Final answer:
A disaccharide is formulated when two monosaccharides join through dehydration synthesis. A water molecule is dropped, and a glycosidic bond is formed between the two sugar elements. Sucrose, lactose, and maltose are crucial disaccharides for humans.
Explanation:
A disaccharide forms when two monosaccharides join by dehydration synthesis. This reaction involves a hydroxyl group (-OH) of one monosaccharide combining with a hydrogen atom of another monosaccharide. As a result, a molecule of water (H₂O) is released, and a covalent bond, specifically known as a glycosidic bond, forms between the two sugar molecules. Disaccharides critical for humans include sucrose (table sugar), lactose (milk sugar), and maltose (malt sugar). However, the human body cannot directly use these. They must first be split into their constituent monosaccharides via a separate process known as hydrolysis in the digestive tract.
Learn more about Disaccharide here:
#SPJ5
1. _____. the phase change of a substance from the solid state directly to the gaseous state; for example, dry ice, moth balls, or solid air freshener
2. _____. a form of energy transferred (by way of conduction, convection, or radiation) by virtue of a difference in temperature; heat is energy in transit; heat is energy flow, measured in energy units
3. _____. matter with definite volume and definite shape
4. _____. theory in physics based on the fact that particles of matter are in vigorous motion and that the temperature of a substance increases with an increase in either the average kinetic energy of the particles or the average potential energy of separation of the particles, or in both, when heat is added
5. _____. a measure of how hot or cold something is; a measure of the average kinetic energy of the particles of a substance
6. _____. matter with no definite volume or shape
7. _____. the process by which a gas changes phase directly to a solid; for example, the formation of frost
8. _____. a gaslike state of matter consisting of positively charged ions, free electrons, and neutral particles; found in stars, the sun, solar wind, lightning, and fire; unlike gases, plasmas are good conductors of electrical currents
9. _____. net absorption of energy
10. _____. the transfer of heat through matter by way of the collision of molecules
11. _____. heat; energy transferred due to temperature differential that becomes associated with potential energy and kinetic energy on a molecular level
12. _____. the process by which water vapor changes from gas to liquid
13. _____. in a closed system in changing from one form to another, matter and energy cannot be created or destroyed; in this sense, conservation means that the physical quantity of matter and energy is entirely preserved during transformations and reactions
14. _____. physical form of matter, such as solid, liquid, and gas; a distinct state of matter in a system; matter that is identical in chemical composition and physical state, and is separated from other material by the phase boundary; for example, the reaction occurs in the liquid phase of the system
15. _____. the process by which water changes to water vapor
16. _____. net release of energy
17. _____. SI-derived unit to measure energy, work, and quantity of heat; for work, a joule is the amount of work done by a force of 1 N acting through 1 m; also newton-meter
18. _____. matter with definite volume but no definite shape.
WORDS.
1.
condensation
2.
conduction
3.
conservation
4.
depostion
5.
endothermic
6.
evaporation
7.
exothermic
8.
gas
9.
heat
10.
joule
11.
kinetic theory
12.
liquid
13.
phase
14.
plasma
15.
solid
16.
sublimation
17.
temperature
18.
thermal energy
Answers
- Sublimation;
- Heat*;
- Solid;
- Kinetic Theory;
- Temperature;
- Gas;
- Deposition;
- Plasma;
- Endothermic;
- Conduction;
- Thermal Energy*;
- Condensation;
- Conservation;
- Phase;
- Evaporation*;
- Exothermic;
- Joule;
- Liquid.
Consider looking up those definitions in a dictionary or in the appendix of your textbook.
Answer is in the Word document.
Answers
Technically, there are an infinite number of possible amino acids, though we've found only 20 common ones that many organisms use and at least half a dozen obscure ones that specific organisms use. We focus only on the 20 common ones unless we're in a college level biochemistry course.
The three categories are nonpolar ones, polar ones, and charged ones. The nonpolar ones have non-polar side chains (no oxygens or nitrogens), the polar ones have polar side chains (most contain an OH group but no COOH group), the charged ones are either acidic or basic (has COOH group or a basic nitrogen).