Answer:
56,9
Explanation:
According to molar concentration, 6.113 grams of sodium chloride are there in 55.0 ml of a 1.90 M aqueous solution of sodium chloride.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in first formula mentioned gives, mass= 1.90×58.5×0.055=6.113 g.
Thus,6.113 grams of sodium chloride are there in 55.0 ml of a 1.90 M aqueous solution of sodium chloride.
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What is the formula to describe the speed of light?
Answer:
Explanation:
Refer the image
Do Neutros and Protons affect the element?
Answer:
Protons identify the element and add to the mass of the element. The mass of a proton is about 1. Neutrons keep the nucleus (the place where neutrons and protons are) together. they also add to the mass The mass of a neutron is also about 1
Explanation:
What is the total number of atoms in the formula (NH4)3PO4?
Isotopes,ions,and atoms worksheet 2 answer key
Explanation:
Isotopes are defined as atoms of the same element but differ in the number of neutrons in their nucleus where a number of protons and electrons remain the same.Ions are defined as chemical species of an atom with an electrical charge.IO with a positive charge are called cations, and ions with a negative charge are called anions.Atom has three subatomic particles: protons, electrons, neutronsAtomic number (Z)= Number of protonsNumber proton = Number of electrons (isoelectric neutral atom)Atomic mass (A)= Number of protons + Number of neutronsThe chemical symbol of an element X is written as:[tex]^A_ZX^C[/tex]
Where : Charge on ion = C
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What is a job of the skeletal system? 1. exchange oxygen and carbon dioxide 2. deliver nutrients to the body 3. remove waste 4. protect organs
Answer:
4 protect organs
Explanation:
this would be in biology category btw
Answer:
4.protect organs
Explanation:
your ribs protect your heart and lungs
What is the mass in grams of 5.9 mol C8H 18
Answer:
Explanation:
The molar mass of
C
8
H
18
=
8
⋅
12
+
18
⋅
1
=
114g mol
−
1
So the mass of
5.90 mole C
8
H
18
will be:
5.90
mol C
8
H
18
×
114
g C
8
H
18
1
mol C
8
H
18
=
673 g C
8
H
18
rounded to three significant figures
Starting with O; in inhaled air, describe in your own words the sequence of gas
movements from the inhalation of oxygen to the exhalation of carbon dioxide.
Answer:
We inhale oxygen through our nasal pasage and mouth, it passes epiglottis which leads air down to the lungs. It travels down the windpipe into right and left bronchi. Around alveoli (small air filled sacks) tiny capillaries bring blood to exchange gases. Oxygen moves from the lungs into the bloodstream and carbon dioxide moves from the bloodstream into the lungs where we exhale back from our mouth
A gas mixture at 0°C and 1.0atm contains 0.010mol of H2, 0.015mol of O2, and 0.025mol of N2. Assuming ideal behavior, what is the partial pressure of hydrogen gas (H2) in the mixture?
A. About 0.010atm, because there is 0.010mol of H2 in the sample.
B. About 0.050atm, because there is 0.050mol of gases at 0°C and 1.0atm.
C. About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
D. About 0.40atm, because the mole ratio of H2:O2:N2 is 0.4:0.6:1.
Answer:
PH₂ = 0.2 atm
C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
Explanation:
To determine the partial pressure of hydrogen gas (H2) in the mixture,
Partial pressure H₂ = Ptotal * xH₂
xH₂ = Mole fraction of H₂ = ∩H₂ / ( ∩H₂ + ∩O₂ + ∩N₂)
xH₂ = 0.01 / (0.01 + 0.015 + 0.025)
xH₂ = 0.01/0.05
xH₂ = 0.2
therefore
PH₂ = pT * xH₂
PH₂ = 1.0 atm * 0.2
PH₂ = 0.2 atm
so the correct option is C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
The correct answer to the question is Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
We'll begin by calculating the mole fraction of Hydrogen (H₂) in the mixture.
Mole of Hydrogen (H₂) = 0.01 mole
Mole of Oxygen (O₂) = 0.015 mole
Mole of Nitrogen (N₂) = 0.025 mole
Total mole = 0.01 + 0.015 + 0.025 = 0.05 mole
Mole fraction of Hydrogen (H₂) =?Mole fraction = mole of gas / total mole
Mole fraction of Hydrogen (H₂) = 0.01 / 0.05
Mole fraction of Hydrogen (H₂) = 0.2NOTE: The mole fraction of Hydrogen, H₂ (i.e 0.2) in the mixture is exactly 20%.
Finally, we shall determine the partial pressure of Hydrogen, H₂. This can be obtained as follow:
Mole fraction of Hydrogen (H₂) = 0.2
Total pressure = 1 atm
Partial pressure of Hydrogen (H₂) =?Partial pressure = mole fraction × total pressure
Partial pressure of Hydrogen (H₂) = 0.2 × 1
Partial pressure of Hydrogen (H₂) = 0.2 atmFrom the calculations made above, we can see that the correct answer to the question is:
Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
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-If the pH of the blood is lower than normal, explain how the kidneys attempt to raise
the pH of the blood.
7. Who was the first explorer from France to reach North America? A. Giovanni da Verrazano C. Louis Joliet B. Jacques Cartier D. Samuel de Champlain
How many electrons are in O2-?
Answer:
There will be 16 electrons in O2-
An important rule for students to know when heating a test tube is to
A) place a cork in the mouth of the test tube.
B) point the mouth of the test tube away from others.
C) hold the test tube loosely with the fingertips.
D) shake the test tube forcefully to keep contents mixed.
Answer:
B .point the test tube away from others
Explanation:
Well in science your supposed to keep it away from you and others so the aroma doesnt harm your nose or anyone eles´s nose
Hoped I helped -\
Sleepy~
____ Are subatomic particles found in the nucleus and carry positive electrical charge.
A. Atoms
B. Electrons
C. Protons
D. Neutrons
E. Electron Shell
Answer:
C
Explanation:
there's no need to rush just calm down baby!!!
Please help also could u put explanation
Answer:
11.6 N/KgExplanation:
[tex]a = \frac{force}{mass} = \frac{3750}{150} = 11.66 [/tex]
The unit of the answer is N/KgWhich combination of solid plus liquid indicates a chemical change has taken place?
es =))
A)
solid + liquid A
B)
solid + liquid B
C)
solid + liquid
D)
solid + liquid D
Answer:
It's D
Explanation:
Trust
Look at the periodic table. Why can’t you find water (H2O), table salt (NaCl), or rust (Fe2O3) on the periodic table?
Explanation:
The periodic table is a list of elements which are arranged by their atomic number.
Water, table salt and rust are not elements. They are compounds which contains more than one element in them. For such compounds, we cannot use the atomic number to easily categorize them.
This is why the periodic table shows the symbol of each individual element. And the arrangement is based on the atomic number.How many grams are in 0.0664 mol of sodium
Answer:
1.5272 grams
Explanation:
We know that the mass of a given amount of an element is number of moles multiplied by the molar mass of the element
Molar mass of Sodium = 23 g/mol
Mass of sodium = Moles of Sodium * Molar mass of sodium
Mass of Sodium = 0.0664 * 23
Mass of Sodium in 0.0664 moles = 1.5272 grams
Which of these best describes the basis on which new scientific ideas are accepted or rejected?
A. Moral and ethical beliefs
B. Popular support
C. Carefully collected and analyzed data
D. Historical support
:I believe it’s C but not sure , lmk
Moral and ethical beliefs best describes the basis on which new scientific ideas are accepted or rejected.
what is scientific idea ?A scientific experiment is an investigation involves in the process of manipulating an independent variable in order to be able to determine the dependent variable means the effect.
The experiment can be used by scientists to demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.
A scientific method is typically use the experimental and mathematical techniques which comprises a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.
A hypothesis is considered to be tentative and it can be defined as a testable explanation for an observation
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Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compound. What should Jamal’s answer be? sodium, calcium, and barium barium, sulfur, and oxygen calcium, barium, and chlorine chlorine, sulfur, and oxygen
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
Given compounds:
Sodium chloride , calcium sulfide, barium oxide
We know that metals form positive ions. In order to solve the problem we must identify the metals from given compounds.
Na⁺Cl⁻
Ca²⁺S²⁻
Ba²⁺O²⁻
We can see that sodium, calcium and barium contain positive charges.
Thus option A is correct.
Because sodium have one valance electron. When it combine with chlorine sodium lose its one electron to complete the octet and chlorine accept it to complete its octet. Thus sodium form positive ion and chlorine form negative ion.
Similarly barium and calcium are present in group 2. Both have two valance electron. When they lose them cation are formed.
Other option are incorrect because,
Option B have sulfur and oxygen which are anion.
Option C have chlorine which is also anion
Option D have chlorine, sulfur and oxygen that are anions.
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
Compare and contrast all the periodic trends as you move down a group of metais. Organize
your response into a heading for each trend
Answer:
The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase.
Explanation:
Dose this help? Tell me if it dose.
Answer:
The modern periodic table has a lot to say about the chemical elements, besides the atomic number, atomic weight, and symbol of the identified elements. For example, chemical elements falling in the same group share common properties, which are different from other groups. Also, go through the periodic table trends and you will come to know a regular pattern in the alteration of physical and chemical properties of elements, as you go from left to right, from top to down direction, and vice versa.
Explanation:
I hope this gives an idea to your question - Good luck ^w
During which method of separation is one of the components of the mixture lost
What type of mixture can be separated by distillation?
Distillation. Distillation is an effective method to separate mixtures comprised of two or more pure liquids. Distillation is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated.
Answer:
D. evaporation
Explanation:
I did the test on edge :)
An atom of sodium and an atom of flourine will combine to form sodium flouride. Which of the following correctly describes sodium flouride?
Group of answer choices
A. an element
B. energy
C. an atom
Answer:
A compound
Explanation:
A compound is formed when two elements combine together. Both sodium and fluorine are elements. These elements combine via the process of chemical bonding.
In this case, an ionic bond is formed between sodium and fluorine, this leads to the emergence of the compound sodium chloride, hence the answer above.
CAN SOMEONE PLEASE HELP ME WITH MY CHEMISTRY ASSIGNMENT.
Answer:
yes its correct
Explanation:
For each obstacle, select the best solution. failing the classes needed to graduate from college: not being able to save enough money to pay for medical school: failing the state licensing exam:
Answer:
(A) getting study help, and retaking classes or exams
(A) applying for a loan
(C) getting study help, and retaking the exam
Explanation:
Name each compound....
Answer:
1. chlorine ion 2. methylene
Explanation:
I think #2 is right. i'm not sure.
where is ultraviolet waves located on the electromagnetic spectrum in relation to other kinds of radiation
ILL MARK BRAILIEST PLEASE HELP
During the Industrial Revolution, society shifted to fossil fuels. True or False
The answer is true because during the industrial revolution is when factories became ran buy machines and used fossil fuels to run.
The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine:
Step 1: Cl2(g)⇌2Cl(g)(fast)
Step 2: Cl(g)+CHCl3(g)→HCl(g)+CCl3(g)(slow)
Step 3: Cl(g)+CCl3(g)→CCl4(fast)
Part A
What is the overall reaction?
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part B
What are the intermediates in the mechanism?
Express your answers as a chemical expression. If there is more then one answer, separate them by commas. Identify all of the phases in your answer.
Part G
What is the rate law predicted by this mechanism? (Hint: The overall reaction order is not an integer.)
Use a for [Cl2], b for [Cl], c for [CHCl3], d for [HCl], e for [CCl3] and k for the rate constant.
Answer:
Overall reaction equation is:
Cl2(g) + CHCl3(g) --> HCl(g) + CCl4(g)
The intermediates are Cl(g), CCl3(g).
Rate law= ka^1/2 c
Explanation:
This reaction is a non elementary reaction. A non elementary reaction is one that does not take place in a single reactive encounter. In other words, the reaction is comprised of many steps.
The overall reaction equation is the sum of all the reaction steps after all intermediates have been cancelled out. The rate law is obtained from the slowest step in the reaction sequence.
Solid,liquid,gas how do they differ in how easily they change shape
Answer:Solid,Liquid,Gas differ from each other by the following ways:-
Solid:It have defined shape.
Liquid:They have an indefinite shape.
Gas:They have no shape:
If an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, what would be the ratio of element A to element B in a compound that had a mass of 11 units?
An atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
What are atom?Atom are defined as smallest unit into which matter can be divided without the release of electrically charged particles.
It can also be defined as the building blocks of matter and were created after big bang theory.
Mass are defined as quantitative measure of inertia, fundamental property of all matter.
Elements are defined as a pure substance consisting of only one type of atom which all has the same numbers of protons in their nuclei.
As ratio of element A to element B is given then the ratio will be 3:1
Thus, an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
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