Answer:
Mass of 1 H atom: 1.008 amu x 1.661 x10-24 g/amu = 1.674 x10-24 g. Mass of 1 mole of H atoms: 1.674 x10-24g/H atom x 6.022 x1023H atoms = 1.008 g.
62 pages
Missing: 66 | Must include: 66
Explanation:
find the location of flourine (F) on the periodic table what type of ion will fluoring form?
Answer:
VII'th group, negative ion
Explanation:
Usually fluorine is located in the seventh(VII) group as fluorine has 7 electrons in it's outer shell with chemical symbol "F"
Fluorine has 7 electrons in it's outer shell therefore, it needs one more electron to get the noble gas configuration. So more electrons means negative ion.
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A buffer solution is made up of acetic acid (CH3COOH) and sodium acetate (NaCH3COO). The major equilibria in the buffer system are represented above. Which of the following equilibria could be used to support the claim that the addition of a small amount of NaOH to the buffer will result in only a very small change in pH?
CH3COOH (aq) + H2O → H3O+ (aq) + CH3COO- (aq)
CH3COO- (aq) + H2O → CH3COOH (aq) + OH-
2H2O (i) → H2O + OH-
a. CH3COOH(aq) + CH3COO- (aq) → CH3COO- (aq) + CH3COOH(aq).
b. CH3COOH(aq) + OH (aq) → 3CH3COO (aq) + H2O(1).
c. H3O+ (aq) + OH(aq) → 2H2O(1).
d. CH3COOH(aq) + H2O(1) → H30+ (aq) + CH3COO (aq).
The equilibria showing how the acetate buffer adjusts to addition of a small amount of NaOH is:
CH3COOH(aq) + H2O(1) → H30+ (aq) + CH3COO (aq)What is a buffer?A buffer is a solution which resists changes to its pH when small amounts of strong base or acid is added to it.
Buffers are made from solutions of weak acids and their salts or weak bases and their salts.
The equilibria showing how a buffer made from acetic acid and sodium acetate (NaCH3COO) adjusts to addition of a small amount of NaOH is as follows:
CH3COOH(aq) + H2O(1) → H30+ (aq) + CH3COO (aq)Addition of NaOH, a strong base will neutralize the hydronium ion, causing the acetic acid ionization equilibrium to shift to the right to produce more of the acetate ion, the conjugate base.
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Agas with a volume of 250 mL has 16.0 moles. If the amount of moles is reduced to
12.0, what is the new volume?
The new volume is mathematically given as
V=93.75ml
What is the new volume?
Question Parameters:
A gas with a volume of 250 mL has 16.0 moles
the number of moles is reduced to 12.0
Generally, the equation for the gas laws is mathematically given as
V1/n1 = V2/n2
Therefore
250/16 = V2/12
v=375/4
V=93.75ml
In conclusion, the new volume of gas is
V=93.75ml
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According to Avogadro's law, how will the number of molecules in 2 liters
of hydrogen gas compare with the number of molecules in 2 liters of
oxygen gas at the same temperature and pressure?
According to Avogadro's law, the two gases will have equal number of molecules.
Avogadro's lawFrom the question, we are to determine how the two gases would compare according to Avogadro's law
First, we will state the Avogadro's law
Avogadro's law states that "equal volume of all gases at the same temperature and pressure contain the same number of molecules"
Now, from the given information
We have 2 liters of hydrogen gas and 2 liters of oxygen gas at the same temperature and pressure
According to Avogadro's law, gases that are equal in volume and are at the same temperature and pressure will have equal number of molecules.
Hence, according to Avogadro's law, the two gases will have equal number of molecules.
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Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments?
DNA that was not contained within a live cell caused the death of the host organism.
DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics.
The two strains of Streptococcus were visually indistinguishable.
Heat treatment of the Streptococcus strains destroyed the DNA molecules.
Answer:
DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics
I hope this helps you
:)
Calculate the molarity of 0. 5 moles NaHCO3 in 3,691 mL of solution
Answer: 0.135 M
Explanation:
BRAINLESS 55 POINTS!!! HELP ASAP PLS!!!
What is the result of the Moon rotating at the same rate it revolves around Earth?
The same side of the Moon is always seen from Earth.
There are unusually high tides.
The Moon completes two revolutions in one night.
Earth’s magnetic field pulls on only one side of the Moon.
3.
Choose the best answer.
If Martin wanted to measure the distance between the Earth and Jupiter, which unit should he use?
astronomical unit
metric ton
millimeter
light year
How long does it take radiation from the photosphere (what we see as sunlight) to reach Earth?
eight years
eight seconds
eight minutes
eight days
9.
Choose the best answer.
Why is the Southern Hemisphere cooler in the summer?
The Earth is closer to the Sun.
The Earth is farther away from the Sun.
The Southern Hemisphere receives less direct sunlight.
The Southern Hemisphere receives more direct sunlight.
10.
Choose the best answer.
Neptune is the eighth planet from the Sun. It takes about 165 years for it to complete one revolution. What would make Neptune have a shorter revolution?
if Neptune rotated faster
if Neptune were further away from the Sun
if Neptune rotated slower
if Neptune were closer to the Sun
11.
Choose the best answer.
Which lunar phase will occur about four days after a full moon?
waxing crescent
waning crescent
waning gibbous
waxing gibbous
Answer:
waxing crescent is the right answer to this question
What is the Lewis Structure for CO2-
Carbon dioxide (CO2) lewis structure has two oxygen atoms and one carbon atom. There are two double bonds around carbon atom in the CO2. No lone pairs on carbon atom and each oxygen atom has two lone pairs on their valence shells. Shape of CO2 is linear.
Escribe la configuracion electronica de 2 elementos metalicos
Answer:
translation: Write the electronic configuration of 2 metallic elements.
Answer:
(See explanation)
Explanation:
Copper: [Ar] 3d¹⁰ 4s¹
Silver: [Kr] 4d¹⁰ 5s¹
why does water taste different (bottled)
Answer:
because the water in a bottle has been purified
Explanation:
Answer:
its becausesome water are mineral and some are not
Explanation:
Light travels faster in air than in water
Answer:
.
Explanation:
Sucrose is very soluble in water. At 25◦C,
211.4 grams of sucrose will dissolve in 100
g of water. Given that the density of the
saturated sucrose solution is 1.34 g/mL, what
is the molarity of the solution? The molar
mass of sucrose is 342 g/mol.
(It's not 1 or 3)
Answer:
number of moles of solute dissolved in one liter of solution.1. 8.28
Explanation:
I'm not sure but I hope it's help
Which element has the most endothermic reaction?
Answer:
erm-- how do i answer this question xd
Explanation:
Gaining of an electron is most exothermic for Fluorine.
Which of the following is surprisingly endothermic response?N2(g)+O2(g)→2NO(g) is an endothermic response because heat is absorbed on this reaction. all of the other reactions are exothermic as the warmth is launched for the duration of the method.
Which one is an endothermic response?Any manner that absorbs warmness from its environment is an endothermic system. consequently, all endothermic reactions are endothermic strategies. An endothermic reaction is any chemical response that absorbs warmth from its surroundings. The absorbed electricity provides the activation electricity for the reaction to arise.
What is a fluorine used for?Fluorine is important for the manufacturing of nuclear material for nuclear power vegetation and for the insulation of electrical towers. Hydrogen fluoride, a compound of fluorine, is used to etch glass. Fluorine, like Teflon, is used to make plastics and is also essential in dental fitness.
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Aluminum Oxide is formed when aluminum combines with oxygen in the air. How many
grams of Alo, are formed when 18.8 g of Al reacts completely with oxygen?
Is obsidian a rock? Does it contain minerals? Help please!!
Answer:
Yes It Is A Rock
Explanation:
It Is Not A True Mineral
What costs does poisoning have for animals, individuals, and businesses? What dangers do you think
poisoning has for public safety?
Answer:
Animal poisoning has the potential to be costly to animals, people, and businesses because the animal may die, posing a conflict of interest issue between the parties.
Animal poisoning poses a threat to public safety since it can act as a source of an unknown substance that can harm the environments occupants.
I hope this helps! ^-^
do any of you gies know how to bet Arceus in legend Arceus
Best Team And Party in Pokemon Legends Arceus. Includes the best team for Cyndaquil, Oshawott, Rowlett, by type, early and middle game, where to catch, recommended Pokemon, & more!
How many moles of C3H8 will be produced from 75 moles of CO2?C3H8 + 5 O2 → 3 CO2 + 4 H2O
25 moles of C3H8 will be produced from 75 moles of CO2.
Mole calculation
To find the value of moles of a product from the number of moles of a reactant, it is necessary to observe the stoichiometric ratio between them:
[tex]C_3H_8 + 5 O_2 = > 3 CO_2 + 4 H_2O[/tex]
Analyzing the reaction, it is possible to see that the stoichiometric ratio is 1:3, so we can perform the following expression:
C3H8 CO2
[tex]\frac{1mol}{xmol} =\frac{3mol}{75mol}[/tex]
[tex]x = 25mol[/tex]
So, 25 moles of C3H8 will be produced from 75 moles of CO2.
Learn, more about mole calculation in: brainly.com/question/2845237
What happens when cold water is poured in a glass?
Answer:
When the cold water hits the hot glass inner wall of the flask the glass starts cooling and shrinking due to thermal expansion (in reverse). But heat conduction takes time, so for a brief moment the inside of the glass wall is colder than the outside of the glass wall.
Explanation:
Sammy and Lisa measure the mass of 3 logs. They burn the logs in a campfire, then measure the ashes. They are surprised to find that the mass of the ashes is less than the mass of the logs. How can this be explained?
The mass was compressed into ashes when the fire burned so the mass of the product was less than the mass of the reactants.
The mass was lost because there was a chemical change.
Some of the mass of the logs was turned into smoke and gasses that escaped into the air.
Mass was destroyed in the heat of the campfire.
Explanation: Hope it helps <3
The law of conservation of mass states that, for any closed system, the mass of the system must remain constant.
So, in other words, mass cannot be created nor destroyed.
In a burning log, the initial mass of the wood and the ashes that are left behind after it burns are different, which would seem to violate the law of conservation of mass.
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? Molecules in both the metal and the surrounding air will start moving at lower speeds. Molecules in both the metal and the surrounding air will start moving at higher speeds. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
This means the air around will heat up, and the plate will cool down. They are trying to reach a thermal equilibrium.
does anyone know the three answers Question 1 which element is in group 5 period 2?, question 3 which element is in group 6 period 2?, question 4 which element is in group 8 period 1? this IPC it is both Integrated Physics and Chemistry
Explanation:
1. Nitrogen
3. Oxygen
4. Helium
look into the periodic system
question 1: nitrogen
question 3: oxygen
question 4: helium
Calculate the pH for the following solutions and indicate whether each solution is acidic or basic.
[H+] = 1.0 × 10-2M pH = __________ Acid/Base
[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]
[tex]\\ \rm\Rrightarrow pH=-log10^{-2}[/tex]
[tex]\\ \rm\Rrightarrow pH=2[/tex]
Acidic
What is the reaction type between zinc chloride+ magnesim
Answer:
Redox reaction
Explanation:
Solid magnesium metal was added to aqueous zinc chloride. The zinc has a higher electronegativity than the magnesium and therefore attracts two electrons from magnesium, which gives magnesium a positive charge.
The element chlorine has atomic no.17 and atomic mass 35. Calculate the no. of protons, neutrons and electrons.
Answer:
Protons = 17 Neutrons = 18 Electrons = 17
Explanation:
The number of protons and electrons are the the same number as the atomic number.
To get the number of neutrons, subtract the number of protons from the mass number.
35-17=18
Answer:
Protons: 17
Neutrons: 18
Electrons: 17
Explanation:
To find the number of protons, you simply have to find the atomic number of the element.
To find the number of protons you have to subtract the atomic number from the atomic mass
To find electrons to add or subtract the charge that the element has. (In this case, it has no charge)
A positive number for maximum useful work in a spontaneous process (voltaic cell) indicates that the cell will perform work on its surroundings. True False
5
6
01:55:54
What is the name of this hydrocarbon?
Н н ннн
T ТАТТІ
Н – С – С – С – С – С — Н
ТІ | 1 T
Н Н Н Н H
hexane
O heptane
оооо
O octane
pentane
Save and Exit
Submit
Mark this and retum
Answer:
Pentane
Explanation:
This is a little hard to look at and figure out what's going on, but I think I got the gist of it. Hydrocarbon naming is fairly simple. They are essentially named based on how many carbons make up the "skeleton." The prefix denotes how many there are, and as we can see, there are five hydrocarbons.
Hex- means six, so this is not correct.
Hept- is not one we see quite often, but it is seven, which again is not correct.
Oct- is eight. Still not five.
Pent- means five. And there you go, there is the answer.
Please help its also urgent ( I have 8 more questions)
Answer:
I might be wrong but I'm pretty sure its B) Robin
Explanation:
Bc it says which animal gets its shelter by interacting with a living part of the environment and a robin is interacting with a tree branch and its a living part of the environment.
AGAIN SO SRRY IF ITS WRONG
How many milliliters of a 2. 99 M solution of glucose, C6H12O6 , molar mass = 180. 155 g/mol , do you need to obtain 25. 0 g of glucose?
For 25.0 g of glucose, 138.9 ml of the 2.99 M glucose solution are needed.
The most common monosaccharide, or kind of carbohydrate, is often glucose.
Molar mass of glucose = 180.155 g/mol
Molarity of glucose = 2.99 M
Mass of glucose = 25.0 g
The formula for calculating the volume of a solution required to obtain a given mass of the solute is given by,
[tex]Volume of solution (V) =\frac{ Mass of solute (m) }{ Molar mass of solute (M)}* 1000[/tex]
Therefore, the volume of the 2.99 M glucose solution required to obtain 25.0 g of glucose is given by,
[tex]V = (\frac{25.0 }{ 180.155}) * 1000 V = 138.9 ml[/tex]
Hence, 138.9 ml of the 2.99 M glucose solution is required to obtain 25.0 g of glucose.
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Is he strong enough to lift a 5.3kg weight? PLEASE HELP
A: No
B:Yes
C: He can lift more tham 5kg
D: He is the president of antartica
Answer:
c....
Explanation:
hope its help...
correct me if im wrong:>
Is he strong enough to lift a 5.3kg weight?
Answer: A. No
Explanation: Obviously, a rooster is not strong enough to lift a 5.3kg weight because a normal rooster would weigh 10kg.