"The Univeral Solvent"
- Water is known to be the universal solvent because of its ability to dissolve more particles than any other liquid.
Cohesion- Cohesion is the property of water to attract other molecules. This helps in making solutions that are essential for most life to propagate.
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How many moles of KBr will be produced from 7 moles of BaBr2?
BaBr2 + K2SO4 --> 2 KBr + BaSO4
1 mole KBr
7 moles KBr
3.5 moles KBr
14 moles KBr
1 mol BaBR2 produces 2mol KBr .
7 mol s of BaBr_2 produces:-
7(2)14mol KBrOption D is correct
How many molecules are in 50.000 g of aspartame?
Aspartame stands for C_14H_18N_2O_5
Molar mass:-
14(12)+18(1)+2(14)+5(16)168+18+28+80294g/molNo of moles:-
Given mass/molar mass50000/294170mol(Approx)No of molecules:
No of moles×Avagadro no170×6.022×10²³1023.7×10²³1.02×10²⁶moleculesduring lanslides rock and soil are?
Answer:
Getting carried down a moutain side or a cliff and they are relocated.
Explanation:
Glaciers are responsible for moving rocks from one place to another
2) The coregion in the area of the Texas Panhandle. This coregion is level plates that ranges in elevation from 3000 to 4500. This is very fry dry and
the characteristics of this coon we would expect to see plenty of
A) wind ersoin
B) water ersoin
C) deposition of sediment
Answer:
the correct answer is B po sure po ako
Explanation:
Sure na sure po
Answer:
The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico? desert. A.
Explanation:
Choose the correct option:
Answer:
i think your answer is d
Explanation:
sorry if it is wrong
Grace runs 6 miles in 2 hours. What is her speed?
Why do chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle??
Chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle because they produce gas without generating heat.
What is kipp's appratus & woulf's bottle?Kipp's appratus and woulf's bottle both are the laborartory appratus and used in the analytical process of any reactions.
Hydrogen sulphide gas will be produced in the laborartory by using both given appratus but we prefer the use of kipp's apparatus because in this apparatus small amount of gas is produced in the controlled heat condition by the reaction between the liquid sulphuric acid and solid iron sulphide.
Hence we prefer kipp's appratus as it produces gas without heat.
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how many grams is 1.25 moles of NaCl
Molar mass of NaCl:-
23+35.558.5g/molNow
Mass=Molar mass ×MolesMass=125(58.5)Mass=7312.5gCarbon 14 decays to Carbon 12 and has a half-life of 5730 years. If a fossil is analysed and it has 5 grams of Carbon 14 and 15 grams of Carbon 12, how old is the fossil?
Answer:
im sorry but this question doesnt make sense
Explanation:
Consider the following reaction: 2 Bi(s) + 3 Cl2(g) → 2 BiCl3(s)
How many grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is
produced? Use correct significant digits and units, for example 1.234 g.
Taking into account the reaction stoichiometry, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Bi + 3 Cl₂ → 2 BiCl₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Bi: 2 molesCl₂: 3 moles BiCl₃: 2 molesThe molar mass of the compounds is:
Bi: 209 g/moleCl₂: 70.90 g/moleBiCl₃: 315.45 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Bi: 2 moles ×209 g/mole=418 g
Cl₂: 3 moles ×70.90 g/mole= 212.7 g
BiCl₃: 2 moles ×315.45 g/mole= 630.9 g
Mass of Cl₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 630.9 grams of BiCl₃ are formed by 212.7 grams of Cl₂, 3.32 grams of BiCl₃ are formed by how much mass of Cl₂?
[tex]mass of Cl_{2} =\frac{3.32 grams of BiCl_{3}x212.7 grams of Cl_{2} }{630.9 grams of BiCl_{3}}[/tex]
mass of Cl₂= 1.119 grams
Finally, 1.119 grams of chlorine gas are required to produce 3.32 grams of bismuth chloride is produced.
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A Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C . The concentration of Cu2+ in the cathode is 1.6×10−3 molL−1 .
What is the concentration of Cu2+ in the anode?
For a Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C, the concentration is mathematically given as
c1=2.7*10^6.77m
What is the concentration of Cu2+ in the anode?Generally, the equation for the Chemical reaction is mathematically given as
Cu---->cu +2^e O
2e+Cu+2 ---->Cu R
Therefore
[tex]Ecell=\frac{0.0591}{n}log(c2/c1)\\\\0.25=\frac{0.0591}{2}log(1.6*10^{-3}/c1)[/tex]
c1=2.7*10^6.77m
In conclusion, the concentration is
c1=2.7*10^6.77m
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What chemistry law is the reason we balance chemical reaction equations?
Answer:
Law of Conservation Matter
In a typical mammalian cell, the net transport by the sodium-potassium exchange pump that maintains the 70 mv membrane potential is 500 singly charged ions per second.
For a typical mammalian cell, the net transport by the sodium-potassium exchange pump, Work done is mathematically given as
W= 5.6*10-18 J
How much work does the pump do each second?Generally, the equation for the Potential difference is mathematically given as
Potential difference = Work done / Charge
Therefore
W=q*P.d
Q= 500 * 1.6*10-19 C
P.d. = 70 mV
In conclusion,Workdone
W500 * 1.6*10-19 * 70*10-3
W= 5.6*10-18 J
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Part G
Explain how the structure of ammonium lauryl sulfate, as described in parts E and F, produces the properties identified in part C. Write a short paragraph or two.
The molecule ammonium lauryl sulfate is a detergent because of its hydrophobic tail and a hydrophilic head which are responsible for its cleansing action.
Properties of ammonium lauryl sulfateThough not shown, I presume that the property labelled as C must have to do with the cleasing action of the molecule ammonium lauryl sulfate.
The substance has a hydrophobic tail and a hydrophilic head which enables it to form miscles and these are the responsible for the cleansing action of the ammonium lauryl sulfate molecule.
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Please answer my question I really need it now
Answer:
1 Li , Na, K, Rb, Cs
2 Co, V , Cr, Mn, Fe
3 Po, Te, Se, S, O
a gas that has a pressure of 7.5 atm and a volume of 20L what would be the new volume if the pressure was changed to 3.5 atm
Answer: 43 L
Explanation:
Proteins are biological polymers made of ?
Answer:
amino acids
Explanation:
Proteins are polymers made from different monomers, called amino acids.
Hope this helps.
50. g of NaNO3 was dissolved in 1250 mL of water.
What is the molality of the solution? (Molar mass of
NaNO3 = 85 g/mol; Density of water = 1.00 g/mol)
m.
Your answer should be rounded to two significant figures. Do not
include units in your answer.
Answer:
.47
Explanation:
I just took a test that asked this exact same question and I got it right.
Question 4 of 10
What effect does adding a solute have on the freezing point of a solution?
A. The solution will not reach a freezing point temperature.
B. The temperature at which the solution freezes is raised.
C. The temperature at which the solution freezes is lowered.
D. The temperature at which the solution freezes is unchanged.
Answer:
C. The temperature at which the solution freezes is lowered.
Balance the equation first.
N2 + H2 -> NH3
a) Find how many moles of NH3 are produced when 4.9 moles of N2 are completely reacted with hydrogen.
b) how many moles of H2 are required to produce 59.4 moles of NH3?
Answer:
Therefore, 12 moles of hydrogen makes 8 moles of ammonia.
Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.
Explanation:
;)’ hola
a sample of helium gas has a volume of 200.0 mL at 730mm Hg pressure. What pressure, in atm is needed to reduce the volume at a constant temperature to 50.0 mL
Explanation:
The question had been explained.
La cantidad de corriente se expresa en...
A. Ohmios.
B. Voltios.
C. Amperios.
Answer:
C
Explanation:
Amps measure the flow of Electrons
Answer:
C
Explanation:
is c
4. One mole of H2O has a mass of 18g. How many moles of H,0 are there in 54g of
H2O?
Answer: 3 moles
Explanation: Divide 54 by 18 to get 3.
What is Solution Concentration with examples
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Solution Concentration or the concentration of the solution.The amount of solute dissolved in a particular amount of the solvent is a crucial parameter and is called Solution ConcentrationEXAMPLE →if you add one teaspoon to two cups of water, the concentration could be reported as 1 t salt per 2 c water.[tex]\purple{\rule{15mm}{2.9pt}} \red{\rule18mm{2.5pt}} \orange{ \rule18mm{2.5pt}}[/tex]
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What is the oxidation number of chromium in sodium dichromate, na2cr2o7?.
Answer:+6
Explanation:Oxygen always has an ON of -2 so when there’s O7 the total is -12. Sodium is in group 1 so has an ON of +1 that means with two of them it’s overall ON is +2. When you combine the two that equals -12 but you want it to equal 0. So it would be +12. Considering there are two chromium present you would divide that by 2 making the answer +6.
How many moles of sulfur are in 53.7 grams of sulfur?
Answer:
1.67 moles (find this by dividing 53.7 by the gram formula mass of sulfur, which is about 32.1)
The co32- ion is an example of a polyatomic ion with ________. a. a nonpolar bond b. linear structure c. resonance structures d. triple bonds
The Co32- ion is a polyatomic molecule and have resonance structure
What is resonance structure?Resonance structures refer to different sets of Lewis structures that depict and explain the delocalization of electrons in a polyatomic ion or a molecule.
What are polyatomic molecules?Polyatomic molecules are molecules that are electrically neutral and have three or more atoms held together by covalent bonds. Examples are So3, Co3 and so on.
Therefore, The Co32- ion is a polyatomic molecule and have resonance structure.
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What makes an acid a strong acid in water makes a base or weak base
Acids or bases with strong bonds remain as molecules in solutions known as weak acids or bases. The acids or bases with weak bonds easily dissociate into ions and are called strong acids or bases.
What is acid or base?Acid is proton donor hydrogen containing substance. Base is proton acceptor molecule.
It can be predicted by pH indicator. pH with value less than 7 indicate acidity and value with more than 7 denotes base, and the one with value 7 is considered as neutral.
Thus, based on bond strength and its dissociation in the water makes it strong acid or weak base.
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9. A 2.00 L flask is filled with propane gas (CH) at a pressure of 1.00 atm and a
temperature of -15.0°C. What is the mass of the propane in the flask?
the correct amswer is 4.17g
A sample of gas has a volume of 8.20 L at 0.750 atm and 375 K. What volume (in L) does the gas occupy at 817 torr and 325 K?
The new volume occupied by the sample of gas is 4.96L.
Given the data in the question;
Initila pressure; [tex]P_1 = 0.750atm[/tex]Final pressure; [tex]P_2 = 817torr = 1.075atm[/tex]Inital temperature; [tex]T_1 = 375K[/tex]Final temperature; [tex]T_2 = 325K[/tex]Initial Volume; [tex]V_1 = 8.20L[/tex]Final Volume; [tex]V_2 = \ ?[/tex]
Combined gas lawCombined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
To calculate the new volume the gas occupy, we subtsitute our given values into the expression above.
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\\ \\ P_1V_1T_2 = P_2V_2T_1\\\\0.750atm * 8.20L * 325K = 1.075atm * V_2 * 375K\\\\1998.75LatmK = 403.125atmK * V_2\\\\V_2 = \frac{1998.75LatmK}{403.125atmK} \\\\V_2 = 4.96L[/tex]
Therefore, the new volume occupied by the sample of gas is 4.96L.
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