Answer:
800 lb of pure solvent , 1700 lb of 20% solution and 500 lb of 10% solution will be mixed to form 3000 lb of 13 % solution .
Explanation:
3000 lb of 13% solution is required .
Total adhesive in weight = 3000 x .13 = 390 lb of adhesive
Available = 500 lb of 10% solution = 50 lb of adhesive
Rest = 390 - 50 = 340 lb required .
rest mass of solution = 3000 - 500 = 2500 lb
mass of adhesive required = 340 lb
Let the mass of 20% required be V
mass of adhesive = .20 V
.20 V = 340
V = 1700
rest of the volume = 2500 - 1700 = 800 lb which will be of pure solvent
So 800 lb of pure solvent , 1700 lb of 20% solution and 500 lb of 10% solution will be mixed to form 3000 lb of 13 % solution .
To form 3000 lb of 13 % solution we need 800 lb of pure solvent, 1700 lb of 20% solution, and 500 lb of 10% solution.
Required wieghts of each solution:
The required solution is 3000 lb of 13% solution
Total adhesive = 3000 x 0.13 = 390 lb
Available adhesive = 500 lb of 10% solution = 50 lb
The required adhesive = 390 - 50 = 340 lb
The rest mass of solution is = 3000 - 500 = 2500 lb
If we assume the weight of 20% solution required to be W, then:
mass of adhesive = 0.20 W
0.20 W = 340
W = 1700 lb of 20% solution
Remaining volume = 2500 - 1700 = 800 lb
So, the pure solvent has a weight of 800 lb.
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During a volcanic eruption, lava flows at a rate of 26m/min. At this rate how far in kilometers can lava travel in 37 minutes?
Answer:
Like stratovolcanoes, they can produce violent, explosive eruptions, but their lava generally does not flow far from the originating vent. Cryptodomes The 1980 eruption of Mount St. Helens was an example; lava beneath the surface of the mountain created an upward bulge which slid down the north side of the mountain.
Explanation:
On your first day working in a laboratory, you are told to make up 1 Liter of a 0.5 Molar Tris solution with a pH of 7.4. You measure out the appropriate amount of Tris base and dissolve it in water. You then measure the pH and find out that it has an initial pH of 11. You add some concentrated HCl, and the pH begins to drop. However, as you approach the target pH, you find that you need to add large amounts of HCl to lower the pH even a small amount. If the molecular weight of Tris base is 121.14, how many grams did you use
Answer:
60.57g of TRIS did you use
Explanation:
The concentration of the Tris solution buffer is 0.5 molar (That is, 0.5 moles per liter). As you need to make 1L, you need to have in the solution 0.5 moles of TRIS.
To convert these moles of TRIS to grams you need to use the molecular weight of TRIS base (121.14g/mol), thus:
0.5 moles TRIS * (121.14g / mol) =
60.57g of TRIS did you use1. In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? Explain your answers using important terms from the lesson and information provided in the laboratory. (sorry if it's hard to answer it's a lab)
Answer: Electrons must be heated to emitted light. When heat was added to the elements,the electrons absorbs the energy and moves to its excited state. Once the electronstarts to fall back to a lower orbit, it emits energy in the form of light. Thedifferent lights being emitted, depends on their wavelength
Explanation: I did the Quantization of Energy Lab
Billy is trying to figure out what type of wood to use for building a model boat. He has a block of wood with a volume of 8.0 cubic centimeters (cm) and a mass of 4.0 grams (g). What is the density of the block of wood in g/cmº to the nearest tenth? 0.5 2.0 4.0 32.0
Answer:
ρ = 0.5 g/cm³
Explanation:
Step 1: Given data
Volume of the block of wood (V): 8.0 cm³
Mass of the block of wood (m): 4.0 g
Density of the block of wood (ρ): ?
Step 2: Calculate the density of the block of wood
The density of the block of wood is equal to its mass divided by its volume. The mathematical expression is:
ρ = m/V
ρ = 4.0 g/8.0 cm³
ρ = 0.5 g/cm³
Warm Ocean currents, like the Gulf Stream current, will create a warmer wetter climate like the one in Northeastern United States and Western Europe.
True
or
False
The specific heats at constant pressure of some common gases are provided as a thirdorder polynomial: �;<<< = � + �� + ��C + ��E, with units J/(mol K). For methane (CH4) the coefficients are � = 19.89, � = 5.024 × 10NC, � = 1.269 × 10NO, � = −11.01 × 10NQ. At a production facility, the gas in a 50-liter tank is compressed to 3,600 psi (gage) during which time the temperature rises to 200°F. How much heat in J is given off as the gas cools to room temperature? Suppose the compressed gas is helium, how much heat would be given off in this case?
Answer:
1.991 kJ
Explanation:
Calculate the amount of heat ( J )
CH4 ;
coefficients are : a = 19.89 , b = 5.02 * 10^-2 , c = 1.269 * 10^-5 , d = -11.01 * 10^-9
attached below is the detailed solution
Explain transmethylation reaction of amino acids.
Answer:Transamination, a chemical reaction that transfers an amino group to a ketoacid to form new amino acids. This pathway is responsible for the deamination of most amino acids. This is one of the major degradation pathways which convert essential amino acids to non-essential amino acids (amino acids that can be synthesized de novo by the organism).
Explanation:
The statements in the table summarize what Johannes Kepler stated in the early 1600s about the motion of planets.
Kepler's Statements
The orbit of a planet around the sun is an ellipse.
As a planet orbits the sun, a line between the planet and the sun sweeps out equal areas during equal periods of time.
There is a mathematical relationship between the time it takes a planet to orbit the sun and the average distance the
planet is from the sun.
Over the last four hundred years, predictions based on his statements have proven true. Which best describes
Kepler's statements?
O hypothesis
O theory
law
explanation
Answer:
it's law
Explanation:
i got it wrong because i put the wrong answer but it was law or c
i hope this help's
Answer: ITS C
Explanation: Its C Laws
Which of the following statements concerning equilibrium constants is true? The equilibrium constant of the reverse reaction is equal in magnitude but opposite in sign of the forward reaction. When related reactions are added together, their equilibrium constants are added together. When the coefficients in a balanced chemical reaction are multiplied by two, the equilibrium constant is multiplied by two. When the coefficients in a balanced chemical reaction are multiplied by two, the equilibrium constant is not affected. When the coefficients in a balanced chemical reaction are multiplied by two, the equilibrium constant is squared.
Answer:
When the coefficients in a balanced chemical reaction are multiplied by two, the equilibrium constant is not affected.
Explanation:
The equilibrium constant of a reaction is known to remain steady.
Even if all the coefficients of all the species in the reaction are multiplied by two, the value of the equilibrium constant will reamin the same because the equilibrium position will not change as a result of that.
The equilibrium constant of a chemical reaction is the value of its reaction quotient at chemical equilibrium, a state approached by a dynamic chemical system after sufficient time has elapsed at which its composition has no measurable tendency towards further change.
The equilibrium depends on the following:-
Volume PressureWhen the coefficients in a balanced chemical reaction are multiplied by two, the equilibrium constant is not affected. The equilibrium constant of a reaction is known to remain steady.
Even if all the coefficients of all the species in the reaction are multiplied by two, the value of the equilibrium constant will remain the same because the equilibrium position will not change as a result of that.
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A tree is shaken to get its fruits down.Why?
Answer:
Because orginisms need to eat the fruit to gain energy
Explanation:
A polysaccharide is best described as
A. glucose
B. 1 simple sugar
C. 3 or more simple sugars combined
(!!!MAKE UP A FAKE ANSWER OR ONE THAT MAKES NO SENSE
I WILL REPORT YOU AND DELETE YOUR ANSWER!!!)
Answer:
3 or more simple sugars combined
Explanation:
A polysaccharid molecules consist of a number of sugar molecules bonded together.
Answer:
Explanation:
Carbonyl fluoride, COF2COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4CF4 via the reaction 2COF2(g)⇌CO2(g)+CF4(g), Kc=5.002COF2(g)⇌CO2(g)+CF4(g), Kc=5.00 If only COF2COF2 is present initially at a concentration of 2.00 MM, what concentration of COF2COF2 remains at equilibrium? Express your answe
Answer:
.36 M
Explanation:
2COF₂(g)⇌CO₂(g)+CF₄(g)
2 0 0
2 - 2a a a
a x a / (2 - 2a)² = 5
a² / 4 ( 1 -a )² = 5
a / ( 1 - a ) = √20
a / ( 1 - a ) = 4.47
a = 4.47 - 4.47 a
5.47 a = 4.47
a = .82
Concentration of COF₂ in equilibrium
= 2 - 2 a
= 2 - 2 x .82
= .36 M
Lava is rock that has undergone a physical change and has liquefied. What is known about this change?
The lava gained mass.
The lava was burned into smoke.
The lava can cool back into rock.
The lava lost mass.
Answer:
It is C-The lava can cool back into rock.
Explanation:
The lava can cool back into rock when it under go physical change and has liquefied.
What is lava?Lava is defined as a molten and partially molten rock (magma) that has expelled from the interior of the terrestrial planet earth or a moon into its surface.
Lava is made up of crystal, volcanic glasses and bubbles.
In liquid lava state, the particle are able move around and slide past one another.
When heat energy is removed from the liquid lava, the particle become more strongly attached to one another and the substance transit back into solid rock state.
Thus, the lava can cool back into rock when it under go physical change and has liquefied.
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If the density of
gold is 19.3 g/cm3 .
What happens to
the density of gold
if I have double the
mass or 2 gold bars?
Doubles
Halves
Stays the same
H2S(aq) + Ca(OH)2(aq)
Answer:
CaS + 2H2O is the balanced equation
Which two tools could be used to measure the volume of this eraser?
A. Triple-beam balance
B. Graduated cylinder
C. Tape measure
D. Digital thermometer
Answer:
Graduated cylinder
Explanation:
A graduated cylinder is essentially meant for volume measurement. It is a cylinder that is graduated from zero to a certain number.
The graduated cylinder is gradually filled with water, the volume of water in the cylinder can be known by reading off the graduation on the cylinder, hence the answer above.
How many atoms of lead are in 3.5 moles of lead?
Answer:
2.1 × 10²⁴ atoms Pb
Explanation:
Avogadro's number: 6.022 × 10²³
Step 1: Find conversions
1 mol Pb = 6.022 × 10²³ atoms Pb
Step 2: Use Dimensional Analysis
[tex]3.5 \hspace{3} mol \hspace{3} Pb(\frac{6.022(10)^{23} \hspace{3} atoms \hspace{3} Pb}{1 \hspace{3} mol \hspace{3} Pb} )[/tex] = 2.107 × 10²⁴ atoms Pb
Step 3: Simplify
We have 2 sig figs.
2.107 × 10²⁴ atoms Pb ≈ 2.1 × 10²⁴ atoms Pb
How many NH4+ ions are in 550 mg of (NH4)3PO4?
My professor usually goes over our in class assignment in class and then assigns us a weekly assignment to finish for homework with the problems being similar to what she has explained. We didn't go over one like this and I don't know how to approach it.
Answer:
7.53 × 10²¹ NH₄⁺ ions
Explanation:
Step 1: Given data
Mass of (NH₄)₃PO₄: 550 mg
Step 2: Convert 550 mg to grams
We will use the conversion factor 1 g = 1000 mg.
550 mg × (1 g/1000 mg) = 0.550 g
Step 3: Calculate the moles corresponding to 0.550 g of (NH₄)₃PO₄
The molar mass of (NH₄)₃PO₄ is 132.06 g/mol.
0.550 g × (1 mol/132.06 g) = 4.16 × 10⁻³ mol
Step 4: Calculate the moles of NH₄⁺ in 4.16 × 10⁻³ moles of (NH₄)₃PO₄
The molar ratio of (NH₄)₃PO₄ to NH₄⁺ is 1:3. The moles of NH₄⁺ are 3/1 × 4.16 × 10⁻³ mol = 0.0125 mol
Step 5: Calculate the number of ions in 0.0125 moles of NH₄⁺
We will use Avogadro's number: there are 6.02 × 10²³ NH₄⁺ ions in 1 mole of ions of NH₄⁺.
0.0125 mol × (6.02 × 10²³ ions/1 mol) = 7.53 × 10²¹ ions
How are transuranium elements made?
Explanation:
The transuranium elements are produced by the capture of neutrons
Hope it will help you
Answer:
Explanation:
The transuranium elements are made by capturing the neutrons.
eg- neptunium
hope this helps
plz mark as brainliest!!!!!!!
6. A quiet sound exerts a pressure of 4.00 x 10^-8 kPa (kPa= kilopascals, a pressure unit). What is this pressure measured in atmospheres if 1 atmosphere =101.3 kPa?
Answer:
GOOGLE MY HUMAN
Explanation:
GOOGLE!!!!!
the liquid immiscible with water is
Which of these statements best explains why chemistry is flexible?
Answer:
It adds new evidence
Explanation:
I just took them exam
If, as is typical, each of them breathes about 500 cm3cm3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? Assume the typical respiratory rate for a healthy adult at rest is 15 breaths per minute. If, as is typical, each of them breathes about 500 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? Assume the typical respiratory rate for a healthy adult at rest is 15 breaths per minute.
a) 1×108m31×108m3
b) 3×103m33×103m3
c) 1×104m31×104m3
d) 1×1010m31×1010m3
Answer:
b) 3x10³m³
Explanation:
The volume of each astronaut breathing in m³ is:
500cm³ * (1x10⁻⁶m³ / 1cm³) = 5x10⁻⁴m³
In 1 minute, the volume is:
5x10⁻⁴m³ * 15 = 7.5x10⁻³m³
In 1 hour:
7.5x10⁻³m³ /min * (60min / 1 hour) = 0.45m³/h
In 1 day:
0.45m³/h * (24h / 1 day) = 10.8m³/day
In 1 year:
10.8m³/day * (365 days / 1 year) = 3942m³ = 3.9x10³m³
That is approximately:
b) 3x10³m³Element Name: Oxygen,
Symbol: 0
What is the Mass:
Protons:
Neutrons: 10
Electrons: 8
lon or Isotope:
Answer:
Element Name: Oxygen
Symbol: O
What is the Mass: 15.999 u
Protons: 8
Neutrons:10
Electrons: 8
Ion or Isotope: Oxide
Given that the specific heat of chromium is 0.455J/g∙K find the final temperature after 35.9J of energy is removed from 11.7g of chromium at 28.5°C.
Answer:
before I tell you the answer what is your name?
Explanation:
Calculate the average atomic mass for the following element given information about the relevant isotopes: (Isotope 1) Mass = 20 amu; Isotopic abundance = 90.92% (Isotope 2) Mass = 21 amu; Isotopic abundance = 0.257% (Isotope 3) Mass = 22 amu; Isotopic abundance = 8.82%
Answer:
The average atomic mass of given element is 20.18 amu.
Explanation:
Given data:
Abundance of 1st isotope mass 20 amu = 90.92%
Abundance of 2nd isotope mass 21 amu = 0.257%
Abundance of 3rd isotope mass 22 amu = 8.82%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (90.92×20)+(0.257×21)+(8.82×22) /100
Average atomic mass = 1818.4 + 5.397 +194.04 / 100
Average atomic mass = 2017.819 / 100
Average atomic mass = 20.18 amu.
The average atomic mass of given element is 20.18 amu.
Lithium reacts with chlorine to form a new substance. What other element will also react with chlorine to form a new substance will similar properties?
Answer:
Sodium to form sodium chloride.
Explanation:
Hello.
In this case, since the reactivity of the elements belonging to same groups in close periods are intimately related to each other, we can infer that since lithium is able to react with chlorine to yield lithium chloride (LiCl), we can infer that the element reacting with chlorine and yielding a compound with similar properties to the LiCl should be sodium which is just below lithium in the periodic table, thus forming sodium chloride (NaCl).
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A piece of an unknown substance has a volume of 2.5 mL and a mass of
20 grams. What is the density of this substance?
Answer:
The answer is
8 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass of substance = 20 g
volume = 2.5 mL
The density of the substance is
[tex]density = \frac{20}{2.5} \\ [/tex]
We have the final answer as
8 g/mLHope this helps you
Where is panauti??????????????
Answer:
nepal
Explanation:
Answer:
Nepal ..Explanation:
Please mark me as brainliest..When converting from kilometers to meters, the decimal is moved _______.
a.
three places to the left
b.
two places to the left
c.
three places to the right
d.
two places to the right.
How do the prefixes in the metric system relate to the basic units?
