A pharmacist mixed some 10%-saline solution with some 15%-saline solution obtain 100 mL of a 12%-saline solution. How much of the 10-saline solution did the pharmacist use in the mixture

Answers

Answer 1

Answer:

10%-saline solution = 60mL

15%-saline solution = 40mL

Explanation:

Let

10%-saline solution = x

15%-saline solution = y

x + y = 100

0.1x + 0.15y = 100*0.12

x + y = 100 (1)

0.1x + 0.15y = 12 (2)

from (1)

x = 100 - y

Substitute x = 100 - y into

0.1x + 0.15y = 12

0.1(100 - y) + 0.15y = 12

10 - 0.1y + 0.15y = 12

- 0.1y + 0.15y = 12 - 10

0.05y = 2

y = 2 / 0.05

y = 40mL

Substitute y = 40 into

x + y = 100

x + 40 = 100

x = 100 - 40

x = 60mL

10%-saline solution = 60mL

15%-saline solution = 40mL


Related Questions

hi does anyone know what the answer to this is? i really need help

Answers

Answer:

The answer is

H. Met, Val, Lys, Arg, Gin, Ser

Explanation:

The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.

Please help lol

Answers

Answer: It is a 2:3 ratio because Al has a +2 charge and S and O both have a -2 charge. It takes 2 Al to bring 3 SO3 to a neutral state.

Explanation:

Using principles of atomic structure, explain why the atomic radius of Te is less than the ionic radius of Te2− . Photoelectron spectroscopy data for the 1s sublevel of Te and the 1s sublevel of O are represented below. In terms of Coulomb's law and atomic structure, explain why the peak for O is positioned so far to the right of the peak for Te .

Answers

Answer:

See explanation

Explanation:

Let us recall that a negative ion is formed by addition of electrons to an atom. When electrons are added to the atom, greater interelectronic repulsion increases the size of the Te^2− hence it is greater in size than Te atom. Therefore, the ionic radius of Te^2− is greater than the atomic radius of Te.

In the second question, oxygen is positioned so far to the right because it has a far smaller nuclear charge compared to Te. Hence in the PES spectrum, the 1s sublevel of oxygen lies far to the right of that of Te.

Using principles of atomic structure, the reason why the atomic radius of Te is less than the ionic radius of Te²− is because of the Electrostatic force of repulsion between the negatively charged electrons of Te²- thereby causing the ion to be bigger than the neutral atom.

We must remember that negative ions are formed as a result of the addition of electrons to an atom.

On this note, the electrostatic force of repulsion between the negatively charged electrons of Te²- ion becomes greater. Hence, the Te atomic radius is less than the ionic radius of the Te²- ion.

By considering the second scenario, the element oxygen is positioned so far on the right because it has a very much smaller nuclear charge compared to Te.

As a result, in the PES spectrum, the 1s sublevel of oxygen lies far to the right of the 1s sublevel of Te.

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Which of the following are common decomposers? (Select all that apply) fungi, ferns, bacteria, viruses, grasses​

Answers

Answer:

Fungi, bacteria, ferns,

Explanation:

bacteria Fungi Ferns are important. decomposers,

I hope it helps you.

There are basically four different categories of decomposers: fungi, insects, earthworms, and bacteria. Fungi, ferns and bacteria are common decomposers.

What are decomposers ?

Decomposers are organisms that disintegrate rotting or dead species; they carry out decomposition, a process only some kingdoms, like fungi, are capable of.

The primary decomposers in nature are fungi, which destroy organic material that would otherwise not be recycled.

Scavengers and decomposers are the two different categories of decomposers. Animals called scavengers hunt down dead plants or animals and consume them. They cut them into small pieces when they eat them.

Each contributes to the food recycling process differently. To transform dead plants or animals into simple substances, fungi release compounds. Some of these elements are absorbed by them for growth, while others go into the soil.

Thus, Fungi, ferns and bacteria are common decomposers.

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What are some examples of HIGH resistance? Question 2 options:
long wire, wide wire, more resistors
wide wire, short wire, less resistors
long wire, narrow wire, more resistors
narrow wire, less resistors, long wire
(PLEASE HURRY! I NEED TO FINISH THIS QUIZ)

Answers

Answer:

long wire, wide wire, more resistors

long wire, narrow wire, more resistors

Explanation:

longer wires have greater resistance. The longer the wire the greater the resistance.

The answer is Long wire, Narrow wire, more resistors

Evidence:

EMERGENCY!!! Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers

Answers

Answer:

A. the valence electrons

Explanation:

Answer:

The valence electrons

Explanation:

The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!

                      ~Good luck

An apple, potato, and onion all taste the same if you eat them with your nose plugged
true or false


i know the answer do you?

Answers

Answer:

Ummm it would just be indistinguishable ..and i don’t think u well taste when u plug your nose so ldk but ig it is true let me know if am wrong

Explanation:

what is the structural formula of propene

Answers

Explanation:

Structural formula of propene

H₃C–CH₂=CH

molecular formula = C₃H₆

molecular mass = 12×3+1×6 = 36+6 = 42

no. of double bond = 1

What occurs during replication?
O A protein is formed from information in messenger RNA.
A messenger RNA strand is made from DNA.
O A copy of DNA is made from existing DNA.
A copy of DNA is transferred from one organism to another.

Answers

Answer:

A

Explanation:

Hopefully this helps

Answer:

A copy of DNA is made from existing DNA.

Explanation:

Just did the quiz

This table shows the pH values of different solutions. A 2-column table with 4 rows. The first column labeled solution has entries W, X, Y, Z. The second column labeled p H has entries 6, 5, 1, 3. Which ranks the solutions from the strongest to weakest acid? W X Y Z Y W X Z W X Z Y Y Z X W

Answers

Answer:

D-  Y -Z -X -W

:)

The solution with lowest pH are more acidic and those with higher pH values are basic. The given solutions can be ranked from the strongest to weakest acid as Y Z X W.

What is pH?

pH of a solution is the measure of its H+ ion concentration. Mathematically it is the negative logarithm of H+ ion concentration of the solution. The acidic solutions contains more H+ ions.

A pH value of 7 represents a neutral solution. The pH above 7 is basic solution and a solution with pH below 7 is acidic in nature. A pH scale can be used to measure the range.

The pH of 1  and 3 indicates strong acidic solutions and 5 and 6 are weakly acidic . The lowest value of pH indicates highest acidity. Therefore, the correct order is Y Z X W.

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Help pls!
How can you use a chemical reaction to remove a contaminant from a solution?

Answers

Answer:

reverse osmosis

Explanation:

Water treatment is often complicated because it deals with the chemical makeup of the water, which varies widely. The first step is to determine what contaminants should be removed. Unfortunately, this is not always a straightforward process. Many contaminants make themselves known in obvious ways, such as iron or hydrogen sulfide, which can cause taste and odor issues. Other contaminants, such as arsenic or pesticides, are only uncovered through a sophisticated laboratory analysis.

It is important to test the water so that the right type of treatment system can be selected. Keep in mind, however, that more than one analysis may be necessary to get a baseline because water quality fluctuates. More information on possible contaminants in a specific area can be obtained by talking to residents, the local health department, the water department, or the state geological society. In addition, your laboratory should be able to recommend appropriate tests based on a customer’s concerns and the information provided about the water source. It is important not only to address customers’ concerns but also to educate them about potential contaminants they may not have considered.

What are the flocculation basins?

Answers

Answer:

The flocculation basin often has a number of compartments with decreasing mixing speeds as the water advances through the basin. ... This compartmentalized chamber allows increasingly larger floes to form without being broken apart by the mixing blades.

About ______ impact the creators have been recognized on earth.

A) one thousand
B) 50
C)500
D)150

Answers

500 thanks for the points

help with this asap please

Answers

ΔH rxn = 434.7 kJ

Further explanation

Given

C+O₂⇒CO₂   ΔH=-393.5 (reaction 1)

2CO+O₂⇒2CO₂  ΔH=-566 (reaction 2)

2H₂O⇒2H₂+O₂ ΔH=483.6 (reaction 3)

Required

ΔH rxn

Solution

Reaction 1 : no change

C+O₂⇒CO₂   ΔH=-393.5

Reaction 2 : the reaction is reversed and divided by 2

CO₂⇒ CO+1/2O₂ ΔH=-283

Reaction 3 : divided by 2

H₂O⇒H₂+1/2O₂ ΔH=241.8

-------------------------------------------

C+H₂O⇒CO + H₂ ΔH rxn= -434.7 kJ

What are the characteristics for mechanical waves

Answers

wavelength, amplitude, time period, frequency and velocity or speed
requires a medium, can’t travel in empty space, low speed, compressional, longitudinal, can travel through opaque objects, water waves, seismic & sound
hope this helps :)

A chemical reaction that has the general formula of AB + C → CB + A is best classified as a
synthesis
polymerization
decomposition
oxidation
replacement
reaction.

Answers

Replacement  reaction.

Further explanation

Given

A chemical reaction

AB + C → CB + A

Required

reaction type

Solution

There are several types of reactions that can occur

synthesis: 2 elements combine to form a single product

polymerization: monomers combine to produce a polymer

decomposition: One compound breaks down into 2 components

oxidation : a change in oxidation number

replacement can be divided into 2

single replacement if one element replaces the other elements of a compound

double replacement if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds

AB + C → CB + A

If we look at this reaction, element C replaces element A to form a new compound CB. So it is single replacement. But this reaction can also be said to be an oxidation-reduction reaction because there is a change in oxidation number

element A undergoes a reduction reaction

element C undergoes an oxidation reaction

So types of redox reactions can be combination, decomposition, displacement, combustion, and disproportion.

Answer:

oxidation

Explanation:

i passed and got 100%

Explain the bond between Mg2C12 and also what type of bond will it be ionic or covalent?

Answers

thanksss for the points AYOOOO

why can fluids flow but solids can’t?

Answers

Answer:

Fluids can flow because their molecular structure is different. Instead of being tightly packed, like a solid, there are fewer molecules per unit in a liquid than a solid. This gives the molecules of a liquid space to move around, and it flows because liquids take the shape of their container(s). These molecules usually tend to bump into each other and this causes the liquid to move as well

Answer:

Because the particles don't move, solids have a definite shape and volume, and can't flow. LIQUIDS - This means that liquid particles are further apart and can move about more easily. Since the particles can move, the liquid can flow and take the shape of its container.

Explanation:

hope this helps

Which of the following does not describe a physical property of iron?
A
Iron is silvery-white or gray in color.
B
Iron has a boiling point of about 3,000°C.
C
Iron is a magnetic element.
D
Iron and sulfur react to form iron sulfide.

Answers

Answer:

B

Explanation:

Iron becomes liquid when we heat it to a temperature of 1535° C this is it's melting point. If we further heat the liquid to 3,000° C it boils; iron is a gas above this temperature.

conditions for reaction of oxygen and copper
state the observation of the reaction
write the equation​

Answers

i believe a hydrochloric gas will be let off

Typhoons are large storms that form over the Pacific Ocean Hurricanes are large storms that form over the Atlantic Ocean. Which of the following are essential components in the formation of a hurricane
or a lyphoon
A High pressure, high temperature, cyclonic winds, dry air
B. High pressure cool temperature, strong winds, humid air
cWarm front, clouds, low pressure, high slevation
D Low pressure, warm temperature, warm ocean waters, spiraling winds

Answers

D. Drop in barometric pressure, warm ocean water, humid air. The low pressure brings in a cool air mass causing collision of two different masses.

My father rode out a typhoon near Okinawa WWII, onboard the battleship USS Missouri BB-63.

Violent pitching, alarms going off for approaching capsize pitch. The captain came on loudspeaker “ don’t worry men, land is near... about a mile straight down”.

Which of the following methods can be used to completely separate a solution containing alcohol and water?

A) Evaporation and distillation
B) Filtration
C)Floatation or centrifuge
D) Magnetism

Answers

A) i think is the answerrrrr

Convert 6.21 km to m

Answers

3.86 MILES if thats what your looking foe

how does reducing the temperature of chemical reaction affect the rate at which it occurs?

Answers

Answer:

When you lower the temperature, the molecules are slower and collide less. That temperature drop lowers the rate of the reaction. When you increase the pressure, the molecules have less space in which they can move. That greater density of molecules increases the number of collisions.

Explanation:

would u like to do a zoom?

If u can...

im just bored and my friend fell asleep on me :/

Temperature measures the average kinetic energy of particles of the substances. Therefore,  reducing the temperature of chemical reaction reduces  rate of reaction.

What is temperature?

Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.

Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.

When the temperature is reduced, the molecules move more slowly and collide less. The reaction's pace is slowed as the temperature drops. When the pressure is increased, the molecules have much less area to travel in. The number of collisions rises as the density of molecules increases.

Therefore,  reducing the temperature of chemical reaction reduces  rate of reaction.

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Can someone help me please!(I will mark you brainliest)

Answers

Answer:

ok Look at it and tell me if you think its correct :}

If you leave your home at noon, and the speed limit is 50 km/h on the highway, what is the approximate time will you get to Atlantic City if Atlantic City is 150 km away? (obeying the speed limit of course)

Answers

Answer:

The time you will get to Atlantic City is 3 pm

Explanation:

Given;

speed limit, v = 50 km/h

distance to be traveled, d = 150km

The time of the motion is given as;

time = distance / speed

t = (150 km) / (50 km/h)

t = 3 hours

Thus, if you leave your home at noon, the time you will get to Atlantic City is given as;

time to get home = 12 pm + 3hours = 3 pm

Therefore, the time you will get to Atlantic City is 3 pm

You are asked to get a compound that has a low melting point and cannot
conduct electricity, which would you pick if you saw three bottles labeled as LICI,
NaBr, and BrF. What type of bond did you get?

Answers

Answer:

the third

Explanation:

What's the Balance equation for:
_C4H10O +_ O2--->_CO2+_H20​

Answers

Answer:

C₄H₁₀O + 6O₂ ⇒ 4CO₂ + 5H₂O

Explanation:

Match the amount of reactants and products on both sides of the equation.

Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained

Answers

Answer:

They each have the same number of protons.

Explanation:

Full question: Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained. What is true about all uranium atoms?

Answer:

They each have the same number of protons

Explanation:

All uranium isotopes have 92 protons in their nucleus. However, they differ in the number of neutrons in the nucleus, hence this also translates to varying mass numbers (which is the sum of neutrons and protons in the nucleus). The most common isotopes of uranium are; U-238, U-235, and U-234

How do the physical and chemical properties of wood contribute to the function of the synthetic products made of wood?

Answers

Wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time. The rigidity of wood is affected by temperature.

What is wood?

Wood is one of the most common and useful natural materials. It is the main tissue that supports and conducts nutrients in trees and other plants. Wood comes in a variety of colours & grain patterns and is produced by numerous botanical species, comprising both gymnosperms & angiosperms.

Its wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time. The rigidity of wood is affected by temperature. Unfavourable weather and unexpected temperatures will have an impact on the wood's strength. Among its attributes are mechanical, chemical, and physical qualities.

Therefore, wood's tensile strength is reduced. Another risk factor for the strength of the wood is the loading time.

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In which sentence is the word sleep used as a participle?Sleeping is the best thing in the world for your body.She looks so cute when she sleeps with her teddy bear.Be careful not to wake the sleeping baby.I was so agitated last night i just wanted to go to sleep. How did Britain respond when China didn't want to trade?A. Britain seized Hong Kong.B. Britain declared war on China.C. British merchants began smuggling in opium to China.D. Britain complied but sold goods through a third party. ok, another one yall you know the rules get it right you get ..... well you know ok what numbers am I thinking of 1 thru 10 ..... HINT (it's not seven)GOOD LUCK YALL Which evidence from the passage best shows Ishmael's circumstances? "The act of paying is perhaps the most uncomfortable infliction that the two orchard thieves entailed upon us." 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