Answer:
0.159 M (3 s.f.)
Explanation:
This is an acid- base reaction, which is also known as a neutralisation reaction.
[tex]\boxed{acid \: + base→salt \: + water}[/tex]
1) Write out the balanced chemical equation.
NaOH (aq) +HCl (aq) → NaCl (aq) +H₂O(l)
The equation is balanced as on each side of the equation, there is 1 Na atom, 1 O atom, 2 H atoms and 1 Cl atom.
2) Find the number of moles of NaOH.
The symbol 'M' denotes Molarity, which is the number of moles per litre.
From the given concentration of NaOH,
1 L NaOH ----- 0.450 mol NaOH
Convert 83.0mL to litres:
Volume of NaOH
= 83 ÷1000
= 0.083 L
Moles of NaOH
= 0.083 ×0.450
= 0.03735 mol
3) Find the number of moles of HCl.
From the balanced equation, 1 mole of HCl is needed to neutralize 1 mole of NaOH.
Thus, amount of HCl
= 0.03735 mol
4) Calculate the concentration of HCl
Concentration= mol/ volume
Converting the volume from mL to L,
235 mL= 0.235 L
Concentration of HCl
= 0.03735 ÷0.235
= 0.15894 mol/L (5 s.f.)
= 0.159 M (3 s.f.)
A weather map of Chicago with a high pressure system and warm front. Based on the weather map, what might the upcoming weather be like in Chicago? Warm, dry, clear skies Warm, humid, possible thunderstorms Cold, dry, clear skies Cool, humid, possible thunderstorms.
A weather map of Chicago with a high pressure system and warm front, so the upcoming weather be Warm, dry, clear skies in Chicago.
What is high pressure of air?High pressure of air tries to compress the gas from upper atmosphere to lower atmosphere.
When any gas has high pressure then it sinks towards the land from the upper atmosphere, and at the upper part air gets cool and form water vapor. When air comes towards the land then, it becomes warm and dry as it doesn't participate in the formation of precipitate. Due to which we are able to see clear sky at the dry days.
Hence, option (1) is correct i.e. Warm, dry, clear skies are the upcoming weather.
To know more about pressure of air, visit the below link:
https://brainly.com/question/441281
Answer:
A. Warm, dry, clear skies
( Hope this helps ) <3 ( Give person above brainliest )
What is the main source of energy for the water cycle.
Answer:
The main source of energy is the sun. The sun has a big part in the water cycle because it turns the water into water vapor. This cause the water cycle to start over again once it rains. Therefore, making the sun ne of the biggest parts in the water cycle.
Aluminum has a density of 2.70 g/cm 3 . Boron has a density of 2.08 g/cm 3 . Predict the density of gallium. Explain your answer.
Answer:
dohsf approval all or pow
Explanation:
Why glucose and fructose produce same shaped products with phenylhydrazine?
During the reaction of glucose and fructose with excess phenylhydrazine to form osazone, only the C-1andC-2 atoms of glucose and fructose participate in the reaction. The rest of the molecule remains intact. Hence, glucose and fructose produce the same osazone.
What is the difference between a nuclear and thermonuclear bomb.
Explanation:
the difference between a nuclear bomb and a thermonuclear bomb is that :
A nuclear bomb derives it's destructive force from nuclear reaction. That is,fission reaction, fusion reaction or both.
While thermonuclear bomb derives it's own force from a chain reaction in which isotopes of hydrogen combines under extremely high temperature to form helium under a process known as nuclear fusion.
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What number of moles of aluminum is required to completely react with 3.20 moles of iron(III) oxide, Fe2O3 according to the following reaction?
SHOW YOUR WORK!!
Fe2O3 + 2 Al → 2 Fe + Al2O3
Answer: 6.40 moles
Explanation:
3. If a sample of gas occupies 6.80 L at 325oC, what will its volume be at 25oC if the pressure doesn't change
Answer:
V2 = 3.39
Explanation:
V1/T1 = V2/T2
V1 = 6.80L
T1 = 325C (must be convert to K by + 273.15) = 598.15 K
T2 = 25C = 298.15 K
V2 =?
T2xV1/T1 = V2
298.15 x 6.80/ 598.15 = V2
3.39 = V2
So 3.39 is the answer!
Is boiling a chemical reaction?
Answer:
yes, because water is reacting with air and heat and creating a boiling effect.
Explanation: kracken doge
Answer: Freezing and boiling are considered to be examples of chemical reactions. This depends on their conception of substance. If students regard ice as a different substance from liquid water they are likely to classify the melting of ice as a chemical change.
Explanation:
Boiling water, boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). No, boiling water is NOT a chemical reaction, but it is a physical change.
What causes water droplets to form on the outside of a glass?
Answer:
under me :)
Explanation:
There is water vapour present around us. When you put cold glass on a table, the water vapour comes in contact with the glass, and condenses, forming water droplets which are seen around the glass. Hope this helps
how many moles of hydrogen are in 4.0 moles of H2SO4
Answer:
1 grams H2SO4 is equal to 0.010195916576195 mole.
Explanation:
Which chemical compound is added to natural gas to safely detect leaks in pipelines and appliances?.
Answer:
Mercaptan is the additive that is added to natural gas to make it easier to detect in case of a leak. The most important thing to know about mercaptan is that it stinks. Some people compare it to the smell of rotten eggs.
Explanation:
What are the uses of Diamonds?
your own answer
please help
Answer:
Diamonds are very important in our daily lives ,so therefore it has many uses
1.They are used ad beauty products
2.They are used in automative industry
3.They are used in making windows
4.They are used as medicine
Explain the process that creates chemical elements lighter than iron, including evidence.
Answer:
. The authorities have closed the casino.(change in passive)
Two white powders are mixed in a flask the bottom of the flask feels cooler this is an example of what kind of reaction?
Describe how the mol- ecule whose formula is NO is different from the molecule whose formula is N 2 O.
Answer:
No, it's a molecule that contains one nitrogen atom and one oxygen atom. This is in contrast to N 2 O, which consists of two nitrogen atoms and one oxygen atom.
What is the wavelength of a light of frequency 4.47x10^14 Hz?
(It's 671 nm)
Weathering and Erosion Unit Test
Explain how crustal deformation builds landforms.
O
When two tectonic plates start to push into each other they can rise up and build mountains, or sink under
and create deep valleys.
O When wind and rain slowly wear away rock, they leave behind new looking landforms.
If
o
When two tectonic plates slide away from each other the inner liquid layer of the mantle comes to the
surface as lava and creates new islands.
It
When sediments are laid down over vast areas the forces involved create rock over a very long period of
time.
It
HELP ME ASAPPP PLEASEEE
Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.
How crustal deformation builds landforms?Tectonic pressure in a crust can cause folding. Folding can end up with the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.
Learn more about plates here: https://brainly.com/question/16939139
How many moles are in 3.5 of “K”?
Explanation: i don't know how can i know the moles in element?
Find the number of molecules and number of each type of atom of 0. 04 moles of H2C2O4
answer
Explanation: i think 0.49
help please:)
how do the red blood cell's shape and size support its function
Answer:
The size of a red blood cell allows for more room to have more cells, The shape of a red blood cell allow it to trap and absorb oxygen
Explanation:
Red blood cells are very small, The shape of a red blood cell isn't just a sphere
I need help finding real life images of both prophase and interphase. I end up mixing them together
Answer:
the first picture is of prophase and the second one is interphase
Explanation:
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According to the Law of Conservation of Matter _______.
a. No atoms are created or destroyed whenever matter undergoes a physical change but can when matter undergoes a chemical change.
b. Atoms are created but not destroyed whenever matter undergoes a physical or chemical change.
c. Atoms are destroyed but not created whenever matter undergoes a physical or chemical change Some atoms are created or destroyed whenever matter undergoes a physical or chemical change.
d. No atoms are created or destroyed whenever matter undergoes a physical or chemical change.
Answer:
A.
Explanation:
Matter is neither created nor destroyed unless it is acted upon by a chemical force/change.
Is H2O a compound, mixture or element? Molecule, mixture, compound, element.
Answer:
Compound
Explanation:
This is because it made up of two elements that's is hydrogen and oxygen in the ratio of 2:1 respectively
Answer:
Compound
Explanation:
H2O isn't on the periodic table so it's not an element. H2O isn't a molecule because it's water. H2O isn't a mixture because it can't be seperated. So, it must be a copound.
Heavy rain and runoff can
A cause erosion
B cause flooding
C fill reservoirs
D all of the above
Use the image to rank the colors from the color that will refract the least to the color that will refract the most.
Least
Most
Answer:
Violet is most likely to refract, while red is least likely to refract
Explanation:
The wavelengths :)
Dispersion states that the shorter the wavelength of the light/color, the more it is refracted. Because of this, the red light is less likely to refract while violet light is most likely to refract
What is the empirical formula of these molecules? Down below. Show your work.
censures hydrogen Oxygen
Answer:
v
You have 40 g of NaCl in 530 g of water.
What is the freezing point?
Answer:
801 •C
Explanation:
Hope this helps! :)
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Substance Specific Heat Capacity J/Kgo C Ammonia 4700 Ethanol 2440 Gasoline 2220 Water 4186 A liquid has a mass of 18. 39g. If 655J of heat are required to change the temperature from 32. 8oC to 18. 2oC, what is the identity of the liquid? A) ammonia B) ethanol C) gasoline D) water
Answer:
B) ethanol
Explanation:
that is the answer I got it in my test
Name the different groups of metals. Name an element with each group.
Answer:
alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides (rare earth elements), and actinides.
Explanation:
How do you test for carbon dioxide ?? Explain
Answer:
Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate
Explanation:
. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white