Taking into account the definition of dilution, the new concentration of the solution is 0.2567 M.
First of all, you have to know that dilution is the reduction in concentration of a chemical in a solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volumeof the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentration Vi: initial volume Cf: final concentration Vf: final volume
In this case, you know:
Ci= 0.385 M Vi= 600 mL= 0.600 L (being 1000 mL= 1 L) Cf= ? Vf= 900 mL= 0.900 LReplacing in the definition of dilution:
0.385 M× 0.600 L= Cf× 0.900 L
Solving:
Cf= (0.385 M× 0.600 L)÷ 0.900 L
Cf= 0.2567 M
In summary, the new concentration of the solution is 0.2567 M.
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brainly.com/question/20113402?referrer=searchResults brainly.com/question/22762236?referrer=searchResultsWhat physical and chemical properties would an antique dealer use to determine the substance that makes up a
piece of jewelry?
Answer:
Characteristics such as melting point, boiling point, density, solubility, color, odor, etc. are physical properties. Properties that describe how a substance changes identity to produce a new substance are chemical properties. ... Physical and chemical properties can be used to classify a substance as ionic or molecular.
The water in a fishery became polluted when toxic waste was dumped into its pond, causing the fish population to substantially decline. The percents of fish that survived are recorded in the table.
Day 1 2 3 4 5
% Survival 79 55 38 31 19
a) What is the order of the reaction live fish ------> dead fish?
b) What is the rate constant?
c) If the fish continue to die at this rate, how many fish will be alive after 10 days?
In the pond, the percentage of fish left after ten days is 4%.
Given that;
N(t) = Noe^-kt
Where;
N(t) = percentage of fish at time t
No = Initial percentage of fish
k = rate constant
t = time taken
Given that we had 100% fish population at the beginning, we can see that this reaction is first order.
The rate constant is obtained from;
When t = 5
19 = 100e^-5k
19/100 =e^-5k
0.19 = e^-5k
ln 0.19 = -5k
k = ln (0.19)/-5
k = 0.33
In ten days;
N(10) = 100e^-0.33(10)
N(10) = 4%
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Rank from most ionic to least ionic
a. WO3
b. MnS
c. MnS2
d. ZnS
e. ZrS2
The order of increasing ionic property is;
WO3 < ZrS2 < MnS2< ZnS < MnS
Ionic compounds are compounds that contain an ion pair. Typically, ionic compounds are formed between metals and nonmetals.
The degree of ionic character depends on the type of metal involved and the magnitude of charge it carries.
Typically, first row transition metals form ionic compounds. The degree of ionic character depends on the row in which the metal is found and the magnitude of charge it carries.
Hence, the order of ionic character of the compounds from most ionic to least Ionic is; WO3 < ZrS2 < MnS2< ZnS < MnS.
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What is this answer to this problem
Answer:
gdhjvdhihfhddjcuh
dhsgbeyfgjgjjkk
tjfhh
gjgu
need help :( number 5 and 6
How would you make the following compounds from N-benzylbenzamide?
a)dibenzylamine
b)benzoic acid
c)benzyl alcohol
Answer:
B.
Explanation:
Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?
Alpha particles are repelled by cathode rays of elements.
b.Cathode rays are deflected towards a positively charged rod.
c.A particular frequency of light is produced by a gas in an excited state.
d.Certain areas of the atom called orbitals contain all the charged particles
Answer:
cathode rays are deflected towards a positively charged rod
Explanation:
The element vanadium had a line with a wavelength of 318.5 nm in its emission spectrum. What is the frequency of this line
The frequency of this line of vanadium is 9.38 x10 ^14 Hz.
Emission spectrum shows how the electron of an atom goes or moves from a higher to a lower energy level.
Now The energy of a photon is given by
E = hc/λ
where
h = Plank's constant = 6.626 x 10⁻³⁴ J s
c = speed of light= 3 x 10⁸ m/s
λ = wavelength = 318.5 x 10⁻⁹ m
Solving
E = (6.626 x 10⁻³⁴ J s x 3 x 10⁸ m/s) / 318.5 x 10⁻⁹ m
E =6.2166 x10 ^-19 J
Also, we know that energy is related to frequency by the equation
E =hf
Where;
h = Planks's constant
f = frequency of photon
Making frequency subject of the formulae
f = E/h
f =6.2166 x10 ^-19 J/ 6.626 x 10⁻³⁴ J s
f = 9.38 x10 ^14 Hz
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What happens to excess heat produced in the muscle during contraction and relaxation
Answer:
Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.
Explanation:
Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.
A sample of gas at 1.0°C is expanded at constant pressure from 10 L to 15 L. The final temperature is:
a: 1.50 °C
b: 411 °C
c: None of all
d:138 °C
e: 183 °C
Answer:
y
Explanation:
yea Mami you know like for real I feel you you know iam seeing but tomorrow I see the equation for the last works positive AAAAA
What Group is this atom located use a number only
*
Some chemicals, most often inorganic salts, in the laboratory have the nasty tendency to absorb water from the atmosphere. This property is called hygroscopicity. Anhydrous (water-free) Cupric Perchlorate [Cu (ClO4)2] weighs 262.447g/mol, but after sitting on out on the bench top absorbs water from the air and now weighs 370.540g/mol. How many water molecules did our Cupric Perchlorate absorb?
If an anhydrous Cupric Perchlorate weighs 262.447g/mol initially and weighs 370.540 g/mol after sitting on the bench to absorb water from the air, the number of water molecules absorbed would be 6 moles.
First, let us calculate the amount of water gained during the course of staying on the bench:
Water gained = weight after gaining water - initial weight
= 370.540 - 262.447
= 108.093g/mole
The total amount of water gained per mol is 108.093. Each water molecule weighs 18.015 g/mole. Thus, the total number of water molecules that will sum up to 108.093 would be:
108.093/18.015 = 6 moles
In other words, the number of water molecules absorbed by the Cupric Perchlorate is 6 moles.
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Carbon has three isotopes: carbon-12, carbon 13, and carbon-14. If the average atomic mass on the
periodic table for carbon is 12.011 amu, which isotope is most abundant? Explain your answer using a complete sentence.
Answer
The most abundant carbon isotope is carbon-12
Explanation:
The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.
In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.
How many unpaired electrons does fluorine have in its ground state electron configuration?
Answer:
1 unpaired electron (s)
Explanation:
What is a polyprotic buffer?
Please solve this question
Answer:
what question?
Explanation:
The vapor pressure of a liquid at a given temperature is measured when the rate of evaporation of a liquid becomes
Answer:
the liquid becomes equal to the rate of condensation
Explanation:
ive come across this question before! and i think its right! :D
The vapor pressure of a liquid at a provided temperature is measured when the rate of evaporation of a liquid evolves equally to the rate of condensation.
What is Evaporation?
Evaporation is the procedure by which water transforms from a liquid to a gas or vapor.
Evaporation is the primary route that water moves from the liquid circumstances around into the water cycle as atmospheric water vapor.
When a molecule around the surface absorbs adequate energy to overwhelm the vapor pressure, it will exit and join the surrounding air as a gas.
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If you have 4.01 g of H2, how many grams of NH3 can be produced?
Answer:
136.5886g of NH3
Explanation:
N2 + 3H2 = 2NH3
The mass of the N2 = 4.01
3H2 has a 2/1 ratio
This means the mass of 3H2 is twice as much as N2.
NH3= 2*N2 = 2*4.01 = 8.02 of NH3
Then, by multiplying the mass by MX (17.031)
8.02*17.031=136.5886g can be produced. Round it if needed.
6. What is the atomic mass of Hafnium if out of every 200 atoms, 10 have mass 176.00 g/mol, 38 have mass
177.00 g/mol, 54 have mass 178.00 g/mol, 28 have mass 179.00 g/mol, and 70 have mass 180.00 g/mol?
Answer:
fg
Explanation:
Calculate the concentrations of all species in a 0.100 M Na2CO3 solution.
The concentrations of all species in a 0.100 M Na₂CO₃ are:
1. The concentration of Na⁺ in the solution is 0.2 M.
2. The concentration of CO₃²¯ in the solution is 0.1 M
We'll begin by writing the dissociation equation for Na₂CO₃. This is illustrated below:
Na₂CO₃(aq) —> 2Na⁺(aq) + CO₃²¯(aq)
Thus, the species in Na₂CO₃ are Na⁺ and CO₃²¯
From the balanced equation above,
1 mole of Na₂CO₃ contains 2 moles Na⁺ and 1 mole of CO₃²¯
1. Determination of the concentration of Na⁺.
From the balanced equation above,
1 mole of Na₂CO₃ contains 2 moles Na⁺
Therefore,
0.100 M Na₂CO₃ will contains = 2 × 0.1 = 0.2 M Na⁺
Thus, the concentration of Na⁺ in the solution is 0.2 M.
2. Determination of the concentration of CO₃²¯
1 mole of Na₂CO₃ contains 1 mole of CO₃²¯
Therefore,
0.100 M Na₂CO₃ will also contains 0.100 M CO₃²¯
Thus, the concentration of CO₃²¯ in the solution is 0.1 M
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Sinong pilipino dito kawaykaway naman kayo dyan haha
Answer:
ako po because I'm pilipino
Explanation:
HAHAH same too
1. How many MOLECULES are contained in 80.0 grams of sodium hydroxide?
Answer:
2 molecules
Explanation:
In 80 grams there will be 2 molecules of NaOH, so mass of Sodium would be 23 x 2 = 46g.
does ch3 have resonance structure?
Answer:
yes
Explanation:
if u watch or look closely u will observe it
The CH₃ has resonance structures as it has odd number of hydrogen atoms.
In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures ,also variously known as resonance structures or canonical structures into a resonance hybrid (or hybrid structure) in valence bond theory. It has particular value for analyzing delocalized electrons where the bonding cannot be expressed by one single Lewis structure.
Thus, CH₃ has resonance structures as it has odd number of hydrogen atoms.
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Models are used to predict behaviors in the real world.
True
False
A student creates a sports drink by dissolving 5.0 g of powder in 250 mL of water. The green colour of the drink is due to the presence Green Dye X, which has a lambdamax of 630 nm. A calibration curve (absorbance versus concentration) at lambdamax is created for varying concentrations (mM) of Green Dye X which has the equation y = 26.4x. If 1.0 mL of the sports drink is diluted to 10. mL with water, then the absorbance is measured to be 0.450, what is the mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g mol-1?
The mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g/mol is 0.355%
Beer's law explains the relation between the concentration of a solution to its absorbance (A) by using the equation.
A = ∈×C×Lhere:
∈ = molar absorptivityL = path lengthNow from the calibration curve in the question, the plot between the absorbance and the concentration gives a straight line of y = mx.
Here
y = absorbance x = concentrationThe equation of the calibration curve is given as:
y = 26.4xi.e.
0.450 = 26.4x[tex]\mathbf{x = \dfrac{0.450}{26.4}}[/tex]x = 0.017 mMIf the sports drink was 10 times diluted while taking the absorption measurement. Then, the actual concentration of green dye in the sports drink is:
= 0.017 mM × 10
= 0.17 mM
The number of moles of green dye in 250 mL (i.e. 0.25 L) sports drink is estimated as:
= 0.17 mmol/L × 0.25 L
= 0.0425 mmol
However, the mass of the green dye present in the sports drink is
= 0.0425 mmol ×418.4 g/mol
= 17.782 mg
Finally, the mass percent of green dye in the drink powder is:
[tex]\mathbf{ = \dfrac{mass (dye)}{mass (powder)} \times 100\%}[/tex]
[tex]\mathbf{ = \dfrac{17.782 \ mg }{5.0 \ g} \times 100\%}[/tex]
[tex]\mathbf{ = \dfrac{17.782 \ mg }{5000 \ mg} \times 100\%}[/tex]
= 0.355 %
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The temperature at which a solid melts is the same as the temperature at which its liquid form solidifies (true or false)
its false not true................
Answer:
True
Explanation:
This is true because, upon cooling the particles in a liquid loses energy, stops moving and remains constant and the forms a solid.
Therefore we can say the freezing point and melting point occurs at the same temperature
Why is mining for coal a long-term concern?
A. It is being replenished faster than it can be mined.
B. The supply will eventually be exhausted.
C. New methods of mining need to be developed.
D. The demand for coal is diminishing.
Answer: Is B: the supply will eventually be exhausted.
Explanation:
there is only so much coal in the world as in many other elements. That is why we are looking for more appropriate and resourceful way of supplying energy and it is a lot safer for the workers involved
As coal is a nonrenewable source of energy so its supply will eventually be exhausted. Therefore, option (B) is correct.
What are nonrenewable sources of energy?Non-renewable energy can be described as energy that comes from fossil fuels such as coal, natural gas, crude oil, and uranium. Non-renewable energy requires human intervention to create it suitable for consumption. Fossil fuels are generally made up of Carbon. Fossil fuels were produced over 300 million years ago.
Non-renewable energy is generally fossil fuels such as coal, oil, natural gas, etc. Fossil Fuels are produced from the remains of animals and plants and can be is divided into three categories.
To produce natural gas from fossil fuels, the decomposition process is longer and conducted with high amounts of pressure and heat. Coal takes millions of years under the crust of the earth to produce through the decomposition of trees, plants, and ferns.
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Write the full electron configuration for a Ca+ ion.
Answer:
[Ar] 4s²
Explanation:
The full electron configuration for the Ca+ ion is:
1s² 2s² 2p⁶ 3s² 3p⁶.
How to determine the electron configuration for the Ca+ ionTo determine the full electron configuration for a Ca+ ion, we need to remove one electron from the neutral calcium atom (Ca). The neutral calcium atom has the electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².
When Ca loses one electron to form the Ca+ ion, the electron removed comes from the highest energy level, which is the 4s orbital.
Therefore, the full electron configuration for the Ca+ ion is:
1s² 2s² 2p⁶ 3s² 3p⁶.
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What is the mass of some honey that has a volume of 120.8 fl oz and a density of 1.38 kg/L?
Answer:
166.704
Explanation:
What sign of chemical change occurs during chemiluminesence?
Production of heat
Production of a gas
Production of light
O Production of a solid (precipitation)
Answer:
Emission of Light
Explanation:
Chemiluminescence is the emission of light as the result of a chemical reaction, and not a property of a specific compound.
Dont know if you were asking for this but hope it helps
