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Answer 1

Answer:

Explanation: Makes since brainlist please!

Related Questions

Please indicate which of the compounds will yield postive results for the permanganate, ninhydrin, and ceric ammonium nitrate tests by placing them in the appropriate boxes.

Answers

The compounds will yield Positive results for the permanganate, ninhydrin, and ceric ammonium nitrate tests are

permanganate test= ethene,

ninhydrin=aspasyic acid Phenylalanine

ceric ammonium nitrate test= methanol

What is a compound?

Generally, A compound is simply defined as a substance made up of two or more different chemical elements held together by chemical bonds that are difficult to break.

In conclusion, For the permanganate test= ethene,

ninhydrin=aspasyic acid Phenylalanine

ceric ammonium nitrate test= methanol

Answers

Answer:

Many people have a qualitative idea of what is meant by concentration. Anyone who has made instant coffee or lemonade knows that too much powder gives a strongly flavored, highly concentrated drink, whereas too little results in a dilute solution that may be hard to distinguish from water. In chemistry, the concentration of a solution is the quantity of a solute that is contained in a particular quantity of solvent or solution. Knowing the concentration of solutes is important in controlling the stoichiometry of reactants for solution reactions. Chemists use many different methods to define concentrations, some of which are described in this section.

Molarity

The most common unit of concentration is molarity, which is also the most useful for calculations involving the stoichiometry of reactions in solution. The molarity (M) is defined as the number of moles of solute present in exactly 1 L of solution. It is, equivalently, the number of millimoles of solute present in exactly 1 mL of solution:

molarity=molesofsolutelitersofsolution=mmolesofsolutemillilitersofsolution(4.5.1)

(4.5.1)molarity=molesofsolutelitersofsolution=mmolesofsolutemillilitersofsolution

The units of molarity are therefore moles per liter of solution (mol/L), abbreviated as MM . An aqueous solution that contains 1 mol (342 g) of sucrose in enough water to give a final volume of 1.00 L has a sucrose concentration of 1.00 mol/L or 1.00 M. In chemical notation, square brackets around the name or formula of the solute represent the molar concentration of a solute. Therefore,

[sucrose]=1.00M(4.5.2)

(4.5.2)[sucrose]=1.00M

is read as “the concentration of sucrose is 1.00 molar.” The relationships between volume, molarity, and moles may be expressed as either

VLMmol/L=L(molL)=moles(4.5.3)

(4.5.3)VLMmol/L=L(molL)=moles

VmLMmmol/mL=mL(mmolmL)=mmoles(4.5.4)

(4.5.4)VmLMmmol/mL=mL(mmolmL)=mmoles

Figure 4.5.14.5.1 illustrates the use of Equations 4.5.34.5.3 and 4.5.44.5.4 .

alt

Figure 4.5.14.5.1 : Preparation of a Solution of Known Concentration Using a Solid Solute

Example 4.5.14.5.1 : Calculating Moles from Concentration of NaOH

Calculate the number of moles of sodium hydroxide (NaOH) in 2.50 L of 0.100 M NaOH.

Given: identity of solute and volume and molarity of solution

Asked for: amount of solute in moles

Strategy:

Use either Equation 4.5.34.5.3 or Equation 4.5.44.5.4 , depending on the units given in the problem.

Solution:

Because we are given the volume of the solution in liters and are asked for the number of moles of substance, Equation 4.5.34.5.3 is more useful:

molesNaOH=VLMmol/L=(2.50L)(0.100molL)=0.250molNaOHmolesNaOH=VLMmol/L=(2.50L)(0.100molL)=0.250molNaOH

Exercise 4.5.14.5.1 : Calculating Moles from Concentration of Alanine

Calculate the number of millimoles of alanine, a biologically important molecule, in 27.2 mL of 1.53 M alanine.

The mass of an unidentified metal sphere is 133 grams. Students determine the
volume of the metal sphere by placing it in a graduated cylinder filled with 25
milliliters of water. The volume of the water rises to 40 milliliters when the metal
sphere is placed into the graduated cylinder. The students calculate the density
of the metal sphere in order to determine the identity of the metal using the
chart below.

What is the identity of the metal?

Aluminum

Tin

Iron

Cobalt

Answers

Given the data from the question, the identity of the unknown metal having a of mass 133 g is Cobalt

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

How to determine the density Mass = 133 gVolume of water = 25 mL Volume of water + metal = 40 mL Vol of metal = 40 – 25 = 15 mL Density =?

Density = mass / volume

Density = 133 / 15

Density = 8.86 g/mL

Comparing the density of the unknown metal (i.e 8.86 g/mL) with those given in the chart in the question above, we can conclude that the unknown metal is Cobalt

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5. How much water would need to be added to 750 mL of a 2.8 M HCl solution to
make a 1.0 M solution?

6. If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will the molarity of the diluted solution be?

7. If I add water to 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?

8. How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?

9. I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume of the solution is 250 mL, what will the molarity of the solution be?

10.
How much water would I need to add to 500 mL of a 2.4 M KCl solution to make a 1.0 M solution

please help me

Answers

The values of molarity and volumes for the given questions are 2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.

What is the relation between the molarity & volume of solution?

Relation between the molarity and volume of the solution will be shown by the following equation:
M₁V₁ = M₂V₂, where

M₁ & V₁ is the molarity and volume of one solution whereas M₂ & V₂ are the molarities and volume of the another solution.

Required volume of water needed to add at 750 mL of a 2.8 M HCl solution to make a 1.0 M solution will be calculated by using the above formula:

V₂ = (750)(2.8) / (1) = 2,100 mL

Required molarity of diluted solution obtained on adding 25 mL of water to 125 mL of a 0.15 M NaOH solution will be calculated by using the above formula:

M₂ = (0.15)(125) / (25) = 0.75 M

Required molarity of diluted solution obtained on adding 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL will be calculated by using the above formula:

M₂ = (100)(0.15) / (150) = 0.1 M

Required volume of HCl of 0.05M HCl can be made by diluting 250 mL of 10 M HCl will be calculated by using the above formula:

V₂ = (10)(250) / (0.05) = 50,000 mL

Molarity of the resultant solution is:

M₂ = (1.5)(345) / (250) = 2.07 M

Required volume of water to add on KCl solution is:

V₂ = (2.4)(500) / (1) = 1,200 mL

Hence required values of molarity and volume are 2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.

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Which statement describes abiotic factors in an environment? chickens run around a farm. soil retains water and nutrients. bacteria use energy to reproduce. plants compete for sunlight in an ecosystem.

Answers

Answer:

soil retains water and nutrients

Explanation:

abiotic factors

water

soil

Answer: B

Explanation:

What is a commission?

A.
taking control of a situation

B.
a military unit

C.
a legal organization

D.
assigned to supervise soldiers

Answers

Answer:

B. a military unit

Explanation:

Please answer this question for me

Answers

Answer:

True.

Explanation:

Ternary acids end in -ic if the polyatomic anion ends in -ate.

Answer:

True

Explanation:

It is clearly given in the hint

A 1 liter solution was diluted to a molarity of 2 M by bringing the volume up to 4 liters. What was the initial molarity of the solution?

Answers

Answer:

8.0 mol/L

Explanation:

To do this problem you need to use C₁V₁=C₂V₂. C=concentration and V=volume. (Note: you dont want to use M₁V₁=M₂V₂ because this is measuring mass not concentration).

So, V₁= 1.0L

C₂=2 Mol/L

V₂= 4 L

C₁ is unknown.

you would plug this equation in like this:

(C₁)(1.0 L)=(2.0 Mol/L)(4.0L).

Do algebra to get C₁ alone.

C₁=[tex]\frac{(2.0 mol/L)(4.0L)}{1.0L} =8.0 mol/L[/tex]

The liters cancel out and you are left with mol/L or M

I hope this helps! good luck :)

Can someone please help me? i will give brainlist

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Answer:

B. Design homes that can be built on stilts where flooding is likely to occur.

C. Replace power lines that have been damaged by severe weather.

Explanation:

[tex]Hope[/tex] [tex]this[/tex] [tex]helps![/tex] [tex]:)[/tex]

The phosphorus atom in pcl3 would be expected to have a:.

Answers

The phosphorus atom in Phosphorus trichloride (PCl₃) would be expected to have a partial positive charge.

What is a partial positive charge?

A molecule has a partial positive charge when it presents differences in electric charges along the molecule.

A molecule that has a partial positive charge is said to be polar because can generate polar bonds.

Moreover, phosphorus trichloride (PCl₃) is a molecule that forms a colorless substance used in the inorganic chemistry industry.

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If the concentrations of a weak acid and its conjugate base are increased from 0.1 M and 0.05 M, respectively, to 0.2 M and 0.1 M, the solution's buffer capacity will _________.

Answers

If we increase the concentrations of a weak acid and its conjugate base by the amounts shown, the buffer capacity will remain the same.

What is buffer capacity?

The term buffer capacity is generally used to describe how much of the acid or base that can be neutralized by a buffer before there can be a change in the pH.

In this case, if we increase the concentrations of a weak acid and its conjugate base by the amounts shown, the buffer capacity will remain the same.

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Mussels need both Ca2+ and CO32- to make their shells. The data showed that the ocean Ca2+ has not changed, so Ca2+ is not the problem.

To determine the CO32- concentration in the ocean, we can use the DIC measurement and the ocean’s pH.

Use the reaction equation above to answer the question on the relationship between pH and CO32- concentration.

Would a decrease in pH mean an increase or decrease in CO32- concentration?

Answers

Answer: Decrease

"Carbon dioxide reacts with seawater to form carbonic acid, which releases hydrogen ions, reducing pH"

Sourced from https://yaleclimateconnections.org/2008/06/covering-ocean-acidification-chemistry-and-considerations/

So basically the ocean is absorbing the CO32- and that lowers the pH as well lowers the amount of CO32- readily available.

This is all I could find on this subject though ;'(

How many moles of water are produced from the following reaction, when 275 kJ of energy is given off?

4 NH3 + 3 O2 → 2 N2 + 6 H2O ΔH = -1530 kJ

Answers

The moles of water are produced from the given reaction, when 275 kJ of energy is given off is 1.08 moles.

How do we calculate moles of water?

The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.
Given chemical reaction is:

4NH₃ + 3O₂ → 2N₂ + 6H₂O

From the stoichiometry of the reaction it is clear that 6 moles of water molecule is produced.

Actual moles will be calculated by using the enthalpy and energy value as:

Actual moles of H₂O = 275kJ × (6 mol H₂O)/1530kJ) = 1.08 moles.

Hence required moles of H₂O is 1.08 moles.

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PLEASE HELP ASAP
More info on picture.
This relationship is known as Graham's Law of Effusion. How many times heavier is the heavy gas compared to the light gas?
(In 3a and 3b the heavy gas took 118 seconds while the light gas took 41 seconds)

Answers

Answer:

A box of ideal gas has consists of light particles and heavy particles (the heavy ones have 16 times the mass of the light ones).

Describe the importance of plaster of paris

Answers

Answer:

plaster is important because of the many uses you can make out of plaster

Mercury-203 undergoes beta minus decay. 203 80 hg → 203 81 tl ? the subatomic particle produced is a(n) . 203 80 hg → 203 81 tl 0 -1 e is this the correct balanced equation? .

Answers

The correct balanced equation of a beta decay undergone by Mercury-203 is as follows:

203 80 Hg → 203 81 + 0 -1 e

What is beta decay?

Beta decay in radioactivity refers to the release of a beta particle by a radioactive element.

Beta particle is characterized by the possession of mass number 0 and atomic number -1.

This means that if Mercury-203 undergoes beta decay, the atomic number of the resulting isotope will be +1 as follows:

203 80 Hg → 203 81 Tl + 0 -1 e

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Consider an atom having four distinct energy levels. If an electron is able to make transitions between any two levels, how many different wavelengths of radiation could the atom emit?.

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Energy levels are the electron shells where electrons are found at a fixed distance from the nucleus of the atom. The atom could emit 6 different wavelengths.

What is wavelength?

A wavelength is a distance between the adjacent crests in wave signals propagated in a system. Wavelength [tex](\rm \lambda )[/tex] is in inverse relation to the frequency of the wave.

When an electron jumps from energy level 1 to 2, 1 to 3, and 1 to 4 one wavelength each is present. Hence, making the total wavelength to be 3, in transition from the first energy level.

Similarly, from energy levels, 2 to 3 and 2 to 4, a total of 2 wavelengths, and from energy levels 3 to 4 one wavelength is produced.

So the total different wavelengths of the radiation that can be emitted will be 3 + 2 + 1 = 6.

Therefore, 6 different wavelengths of radiation will be emitted by the atom.

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Fill in the blank.

_______ is defined as the energy of motion.
_______ is proportional to the average kinetic energy of the sample of matter.
Temperature indicates the _______ of heat flow.
Heat flows only from _______ objects to _______ objects.
The _______ scale is the absolute temperature scale where zero degrees is defined as an absolute zero.
_______ is the lowest possible temperature where no heat energy would remain in the substance and molecules and atoms would stop moving.
_______ is the net movement of particles from regions of high concentration to regions of low concentration.
The transfer of heat from a hot to a cold body would stop when _______ is reached.
_______ is the quantity of heat that a body of matter absorbs or releases when it experiences a temperature change of 1 Kelvin.

Answers

Answer:

Kinetic energy, Kelvin temperature, direction, warmer, cooler, Kelvin, Absolute zero

Explanation:

THe answers are in order and when there is a comma move to the next ______

What is the purpose of adding base in the aldol condensation reaction? choose the best answer.

Answers

Base is used in aldol condensation reaction

because it is an organic reaction to form enolate ion, the OH bond present in base help to remove Acidic hydrogen of enolate ion.

How many grams of NaCl required to form a 500ml solution with a molarity of 0. 5M , the molar mass of NaCl is 58. 5g/mol?

Answers

Answer:

14.625 gm

Explanation:

(x / 58.5 gm) / (500ml /1000 ml) = .5 x = 14.625 gm

Which molecule is hexanal?

Answers

Answer:is A.

Explanation:Because six carbon straight chain aldehyde it is clear liquid with an atomspheric pressure boiling point of 131 degree Celsius.

Alice kicks a 0.25 kg soccer ball with 0.5 N of force. What force does the ball exert on Alice’s foot as she kicks it?

N

Answers

Answer:

0.5 N

Explanation:

The ball pushes back with the same force as Alice applies to it

Answer:

0.5 Newtons

Explanation:

did it on edge and got it right

There is a bell at the top of a tower that is 45m high. The bell weighs 190N (N=Newtons). The bell has potential energy. The formula for Potential energy is PE = mgh or mass x gravity x height. Gravity is 9. 8 m/s^2. What is the bell’s potential energy?

Answers

Since the bell weighs 190 N and is 45 m high, the bell’s potential energy is 8550 J

To answer the question, we need to know what potential energy is.

What is potential energy?

This is energy due to position. It is given by PE = mgh where

m = mass, g = acceleration due to gravity and h = height of object.

Also, W = mg = weight of object.

So, PE = Wh

The bell's potential energy

Now, given that the bells weight 190 N and is 45 m high,

W = 190 N and h = 45 m.

So, PE = Wh

= 190 N × 45 m

= 8550 Nm

= 8550 J

So, the bell’s potential energy is 8550 J

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Which acid/base pair will give an equivalence point that cannot be predicted solely by a general knowledge of acid and base strength

Answers

The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.

What is an Acid and base?

An Acid is a substances that is corrosive in nature and turn blue lithmus paper to red which it react with base to produce salt and water.

Acid dissolve metals.

Base is a substance that turn red lihthmus paper to blue and react with acid to produce salt and water.

Therefore, The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.

The question is incomplete as the options were not given. The options were gotten from another website.

Select the correct answer below:

ONaOH and HCI ONH,

HC ONH, and CH, COOH

NaOH and Christmas, COOH

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Please Please Please help + show the work please! :)

Find the number of grams 9.30 x 10^-3 mole of SmO

Answers

The gram-formula mass of Sm is 150.36 u, and the gram-formula mass of O is 15.999 u, so the gram-formula mass of SmO is about 150.36+15.999 = 160.36 g/mol.

So, there are about (9.30 * 10^-3)(160.36)=1.49 grams

Molar mass of SmO or sodium methylate is 160g/mol

Now

No of moles =Given mass /Molar mass

Given mass

No of moles ×Molar mass9.3×10^{-3}×1601.488g

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Calculate the concentration of a solution of nitric acid in which 2.6g is dissolved into 2.0 L

Answers

MM=97.10 that’s the answer

what was happening to the H20 when the lines on the graph were mostly flat? What kind of energy was being added to the system?

Answers

Answer: A heating curve graphically represents the phase transitions that a substance undergoes as heat is added to it.

The plateaus on the curve mark the phase changes. The temperature remains constant during these phase transitions.

Water has a high boiling point because of the strong hydrogen bonds between the water molecules; it is both a strong hydrogen bond donor and acceptor.

The first change of phase is melting, during which the temperature stays the same while water melts. The second change of phase is boiling, as the temperature stays the same during the transition to gas

Explanation:

That's latent heat of vaporization.

Water boils at 100°CThe graph increases still 100°Conce it reaches boiling point it yields a straight line because of latent heat after all molecules are evaporated then the graph rises back

Calculate the pH of a solution with [H+] = 5.6 x 10^-8

Answers

Answer:

Approximately [tex]7.25[/tex].

Explanation:

If the concentration of [tex]{\rm H^{+}}[/tex] ions in a solution is [tex]x\; {\rm M}[/tex], the [tex]{\rm pH}[/tex] of that solution would be [tex](-\log_{10}(x))[/tex].

Note that the base of the logarithm in this calculation should [tex]10[/tex]. One way to be sure is to state the base explicitly. Using the change of base rule of logarithms:

[tex]\begin{aligned}-\log_{10}(x) = -\frac{\ln(x)}{\ln(10)}\end{aligned}[/tex].

In this question, it is implied that the concentration of [tex]{\rm H^{+}}[/tex] in the given solution is [tex]5.6 \times 10^{-8}\; {\rm M}[/tex], such that [tex]x = 5.6 \times 10^{-8}[/tex]. Using the equations above:

[tex]\begin{aligned}& \text{pH of this solution} \\ =\; & -\log_{10}(x) \\ =\; & -\frac{\ln(x)}{\ln(10)} \\ =\; & -\frac{\ln(5.6 \times 10^{-8})}{\ln(10)} \\ \approx\; & 7.25\end{aligned}[/tex].

1. Given the following reaction, answer the questions that follow:
C3H8+5 02
3 CO₂ + 4H₂O
a) If you begin with 3.5 moles of C3H8 and 6.2 moles of O₂, find the moles of carbon dioxide produced_
b) Find the mass of CO₂ produced using your work in step (a) above.

Answers

Answer:

See below

Explanation:

From the equation you can see 5 mole O2 results in 3 moles CO2

( this is the limiting reagent because C3H8 : O2 is 1:5)

6.2 / 5 * 3 = 3.72 moles CO2 produced

CO2 weighs ~ 44 gm/mole 44 gm/mole * 3.72 mole = 163.68 gm of CO2

A 2.0 l container of oxygen had a pressure of 3.2 atm. what volume would be necessary to decrease the pressure to 1.0 atm? use the formula: p1v1 = p2v2 0.625 l 0.64 l 6.4 l 64 l

Answers

The volume that would be necessary to decrease the pressure to 1.0 atm is mathematically given as

v2=6.4l

What volume would be necessary to decrease the pressure to 1.0 atm?

Question Parameter(s):

A 2.0 l container of oxygen had a pressure of 3.2 atm

Generally, the equation for the is mathematically given as

P1v1=p2v2

Therefore

v2=piv1/p2

v2=2*3.2/1

v2=6.4l

In conclusion, the volume is

v2=6.4l