The density has been given as the mass of the substance per volume of the solution. The mass of citric acid in the bottle has been 1.22 grams.
What is percent mass?Percent mass can be given as the mass of substance in the total mass of the solution.
The volume of the face serum has been 250 mL, and the density is 0.979 g/mL.
The mass of face serum in the bottle has been:
[tex]\rm Density=\dfrac{Mass}{Volume}\\ 0.979\;g/mL=\dfrac{Mass}{250\;mL}\\ Mass=244.75\;g[/tex]
The total mass of face serum has been 244.75 grams.
The percent mass of citric acid in face serum is 0.5%. This states the presence of 0.5-gram citric acids in 100 grams sample.
The mass of citric acid in the face serum sample is given as:
[tex]\rm 100\;gram\;sample=0.5\;g\;H_3C_6H_5O_7\\\\244.75\;grams\;sample=\dfrac{0.5}{100}\;\times\;244.75\;grams\; H_3C_6H_5O_7\\\\244.75\;grams\;sample=1.22\;grams\;H_3C_6H_5O_7[/tex]
The mass of citric acid present in 250 mL serum sample has been 1.22 grams.
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Help me please!!!( ꈍᴗꈍ)
Answer:
Vapour pressure
Explanation:
For liquids
[tex]\\ \rm\Rrightarrow V_p\propto T[/tex]
If vapour pressure increases temperature increases.If vapour pressure decreases temperature decreasesCan you use your plot to predict the absorbance of a 214 mm solution of nickel(ii) chloride and why?.
The absorbance of the 214 mm solution of nickel(ii) chloride can be obtained by fitting it into the regression line of the calibration curve.
What is a calibration graph?During measurements of the concentration of a solution using a spectrophotometer, it is conventional to first calibrate the instrument. The calibration is done by measuring the absorbance of various concentrations of the test solution after measuring the absorbance of the sample blank.
After the instrument has been calibrated, the absorbance of any test solution can now be obtained by fitting it into the regression line of the calibration curve.
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what's an exothermic reaction-_-
Answer:
An exothermic reaction is a reaction in which heat is libberated or given off to the surroundings.
Explanation:
Example: neutralisation reaction.
What is the number of moles of kf in a 29-gram sample of the compound.
Given
Weight of pottasium fluoride (KF) = 29 gms
To find
Number of moles of pottasium fluoride = ?
Solution
we know that molar mass of KF = 58.0967 g
Now,
[tex]number \: of \: moles = \ \\ \frac{given \: weight \: of \: subtance}{molar \: mass} [/tex]
Number of moles = 29/58 = 0.5 moles
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Answer: 0.50 mol
Explanation:
if you solve you get choice 3 (0.50)
Four glass tanks contain water. In which tank is the pressure of the water on the base greatest.
A state government is trying to decide between using windmills or a nuclear
power plant. What advantage does nuclear power have over wind power?
O A. Nuclear power uses the kinetic energy of wind.
B. Nuclear power can produce electricity in any weather.
O C. Nuclear power produces less waste.
D. Nuclear power produces more greenhouse gases.
SUBMI
Answer:
B. NUCLEAR POWER CAN PRODUCE ELECTRICITY IN A Y KIND IF WEATHER.
what is that abbreviated electron configuration for cobalt?
Answer:
[Ar][tex]4s^{2}3d^{7}[/tex]
Explanation:
To write abbreviated electron configurations, begin with the element of interest and work your way down in atomic numbers to the next smallest noble gas.
Write the noble gas symbol in [brackets] and then write the electron configuration as you would normally.
I hope this helps you
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Name the elements that make up lithium hydroxide.
Answer:
Lithium, oxygen, and hydrogen.
What Is Chromium: Chemical Formula Of Sodium Bicarbonate
Uses Of Cotton: Acetone Formula
Solution Examples: Amino Acid Formula
Explanation:
HOPE ITS HELP;)
A bolt of lightning strikes the ground 3.5 km (2.2 mi) away and is followed by a crack of thunder. Thunder has a frequency of around 100 Hz and a wavelength of approximately 3.5 m. Use this information to answer the following questions.
i. How long does it take for the light to reach your eye? (2 points)
ii. What will the delay be between lightning flash and thunder boom? (2 points)
iii. Would low-frequency sound waves such as thunder most likely be studied using quantum mechanics or classical mechanics? What would be used to study lightning? (1 point)
Answer:
Explanation:
speed=350
spee=d/t
t=distance/speed
3500m/350=10sec
It will take 10 seconds for the light to reach your eye.
speed=350
spee=d/t
t=distance/speed
3500m/350=10sec.
Why is there a postponement among lightning and thunder?Thunder and lightning all occur because of the discharge of power – thunder is a soundwave, and lightning is the emission of electromagnetic electricity. The cause we see a flash of lightning earlier than hearing thunder is because light travels quicker than sound.
If you rely on the variety of seconds among the flash of lightning and the sound of thunder and then divide with the aid of 5, you will get the gap in miles to the lightning: five seconds = 1 mile, 15 seconds = three miles, 0 seconds = very close. keep in mind that you ought to be in a secure place at the same time as counting.
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A student wants to prepare 250.0 mL of a 0.754 M HCl solution, starting with a 11.7 M HCl solution. How much of the 11.7 M HCl solution is needed
Help!!!! Its a chemistry question Please Take a look at the following chemical reaction and data table provided.
What mass of water is expected to be produced in the reaction above?
Answer:
The third one is the answer.
2. If you are given the mass of a reactant in grams and want to calculate the mass of
a product in grams, what are the three steps of the calculation you must perform?
Answer:
1. Convert given mass of reactant to moles.
2. Convert moles of reactant to moles of product using the coefficients in the balanced equation.
3. Convert moles of product back to grams of product
Explanation:
In order to find out the mass of a given product in grams you would have to convert the grams into moles by multiplying 1 mole over the given mass of the reactant. Then, you would convert the moles of the reactant into moles of the product using mole ratio. And lastly, you would multiply by the mass of the product to calculate the mass back to grams.
Hope this helps!!<3
What influences ionisation energy
Answer:
What are the trends of ionization energy?
Ionization energy is the minimum energy required to remove an electron from an atom or ion in the gas phase.
The most common units of ionization energy are kilojoules per mole (kJ/M) or electron volts (eV).
Ionization energy exhibits periodicity on the periodic table.
Explanation:
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mention roles played by Moses
Answer:Each event in the journey from Egypt to Mount Sinai, where God delivers his laws to the Israelites, propels Moses further into the roles of prophet, priest, ruler, and savior of Israel. Moses' most heroic virtue is his steadfast obedience, and it might be said that a passive quality permeates each of his miracles.
Explanation:
18 which solution has a molality of 0.25 m Naci?
0.5 mol Naci in 4.0 kg water
0.25 mol NaCl in 10 kg water
0.25 g Nai in 1.0 kg water
1.0 kg NAC in 40 kg water
is mendelevium flammable
How is pomace related to the apple and yogurt industries? (1 point)
Pomace is a waste material from apple juice production that can be added to yogurt to boost nutritional value.
Pomace is a chemical from apples that can be used to remove non-nutritional products from yogurt.
Pomace is a waste material from yogurt production that can be added to apples to boost nutritional value.
Pomace is a chemical from yogurt production that can be used to purify waste from apple juice production.
Pomace is a waste material from apple juice production which can be used in yogurt industry in order to increase more nutrients.
What is relation of pomace to apple and yogurt industries?Pomace is a waste material that can be extracted after apple juice production. It can be added to yogurt to boost nutritional value. Apple pomace is also used to produce pectin, ciderkin, a weak cider, as well as white cider so we can conclude that Pomace can be used in yogurt industry in order to increase more nutrients.
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Answer:
A. Pomace is a waste from Apple production that can be added to yogurt to increase nutritional value.
Explanation:
Just took the test.
1. Organelles in prokaryotic cells include the
(a) mitochondria.
(b) cytoskeleton.
(c) Golgi complex.
(d) none of the above
Why does the color absorded by a solution differ from the color of the solution.
Answer:
The size of the particle has a color effect in Rayleigh scatter, but that is unrelated to your question. In the visible spectrum, the main factor determining the color is electronic transitions in the atoms and molecules which make up the substances.
For very simple compounds, it is relatively easy to determine the absorption bands. The bands could possibly change in solution because the electrical environment of the compound’s molecules could change while in solution with water’s polar molecules. However, in many cases, the bands only change slightly so that a purple crystal for example might remain a purple color in aqueous solution.
Some compounds are very sensitive to ionization and to the pH of the aqueous solution, and for these compounds you may see large color shifts as they go into solution.
A 350. mL air sample collected at 35°C has a pressure of 550. torr.
What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?
[tex]\tt \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
T₁ = 35 + 273 =308 K
T₂ = 57 + 273 =330 K
550.350/308 = P₂.425/330
P₂ = 485.29 torr
Which heats up the fastest? treated glass, aluminum, stainless steel, or copper?
Answer:
stainless steel
Explanation:
stainless steel would heat up fast because it is made of metal
is dimensional analysis the same thing as unit conversions?
Answer:
The answer is no
Explanation:
the factor-label method, also known as the unit-factor method, is a widely used technique for such conversions using the rules of algebra.
Name two properties that make solutions different from colloids.
Answer:
1. the apperance of a solution is clear while that of a colloid is dull
2. colloids are heterogenou while solutions are homogenous
Who know how to do this♀️
4L of a solution contains 80.Omoles of solute, what is the molarity? (show all work)
When the ocean water freezes or evaporates, the salinity of the ocean
Answer:
As water freezes or evaporates, what happens to the salinity of the remaining ocean water? There is no change to salinity.
Explanation:
Telescopes PLS missing words i've done most of it but stuck on two pls help
Answer:
A objective
B occular body
C Light Gathering
D Magnifying images
E Improving resolution
F Climate controlled
G Distortion
H Temperature
Exactly how many gallons are in a 1 gallon jug of water?.
Are two atoms of the same element identical?
Answer:
No they are not identical.
Explanation:
They are not identical because there are many ranges of states that the electrons could have.
I hope it helps! Have a great day!
Muffin ^^
Answer:
No.
Explanation:
It could vary so it wouldn’t be identical.
I hope it helps! Have a great day!
bren~
101. During the making of steel, iron(II) oxide is reduced to metallic iron by treatment with carbon monoxide gas.
FeO (s) + CO (g) Fe ( s)
Suppose 1.45 kg of Fe reacts. What volume of CO(g) is required, and what volume of CO2(9) is produced, each measured at STP?'
Explanation:
At a certain temperature, iron (II) oxide, FeO, can react with carbon monoxide, CO, to form elemental iron, Fe, and carbon dioxide, CO2. The value of Kp at that temperature is 0.242. What is the pressure of CO2 at equilibrium if a sample of FeO was initially in a container with CO at a pressure of 0.95 atm? The chemical reaction involved in this process is: FeO(s) + CO(g) ⟷ Fe(s) + CO2(
What are some good puns about elements in chemistry?.
Answer:
When all the elements die, we Barium!
Ugh, I need to zinc of new Chemistry puns…
Oxygen and Magnesium are going out? O Mg!
Don't trust atoms! They make up everything!
