Answer:
The answer is A.........
Answer:
It´s letter A
Explanation:
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
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
List the two thing that will weaken and eventually kill hurricanes
A)
B)
Answer:
A. when winds are to strong
B. cool tempatures
Explanation:
How do the force factors compare to the products of the masses?
Answer:
The force factors are equal to the first numbers of the products of the masses in scientific notation.
Explanation:
Ex. 1.0 x 10^5 kg^2 then the force factor would be 1.
ex. 3.0 x 10^12 kg^2 then the force factor would be 3.
To solve this we must be knowing each and every concept related to scientific notation and its calculations. Therefore, in scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
What is scientific notation?Mathematics is a way of representing numbers using a decimal number ranging from one to 10, but not 10 multiplied by a factor of 10. The most common type of mathematical notation is All numbers in scientific notation are expressed in the generic form N 10m.
In scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
Example1 1.0 x 10⁵ kg² , force factor is 1.
Example2 3.0 x 10¹² kg² ,force factor is 3.
Therefore, in scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
To learn more about scientific notation, here:
https://brainly.com/question/18073768
#SPJ2
Why reaction between phosphorus and oxygen produces four atoms of phosphorus and five atoms of oxygen
Answer:
Reaction between an oxygen and a phosphorus will produce oxides of phosphorus.
Explanation:
Reaction between oxygen and phosphorus produces four atoms of phosphorus with five atoms of oxygen. Sometimes it produces two atoms of phosphorus and five atoms of oxygen and sometimes four atoms of phosphorus and six atoms of oxygen. It does so depending upon the availability of oxygen. The size of phosphorus atom interferes with the ability to form a double bonds to the other elements, such as nitrogen, oxygen, etc.
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A giraffe is found in the African grasslands. Is this an example of a habitat or a niche
Answer:
Niche i think
Explanation:
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What's the Balance equation for:
_C4H10O +_ O2--->_CO2+_H20
Answer:
C₄H₁₀O + 6O₂ ⇒ 4CO₂ + 5H₂O
Explanation:
Match the amount of reactants and products on both sides of the equation.
A student is asked to determine the chemical formula for the compound Barium
chloride. When writing the chemical formula, what question will the student need to
ask to determine the correct formula?
What period does barium belong to?
Are barium and chlorine a metal and nonmetal?
What is the state of matter of each element that comprises the final formula?
What are the charges of each atom?
Answer:
Are barium and chlorine a metal and nonmetal?
Explanation:
I had the same question, and my class reviewed the test and this was the answer to this question.
why is a frozen popsicle a homogeneous mixture and not a pure substance
Answer:
You can not see the sugar.
Explanation:
What is the life cycle of an average sized star?
Answer:
The Middle Years
Explanation:
Depending on the size of the star, the period of which thermal energy is created through the process of nuclear fusion can vary. However, for the life cycle of an average star, this can be roughly a few billion to 10 or even 15 billion years
How is a doorbell an example of an electrical transformation
What dose sediment consisting
Answer:
sediments consist of rocks and minerals, as well as the remains of plants and animals
Explanation:
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
In a living cell which process uses up atp
Answer:
Metabolism
Explanation:
because energy change takes place
According to Le Chatelier's principle, what happens to the equilibrium constant (K) when the concentration of the reactants is doubled? The value of the equilibrium constant (K) is doubled. The value of the equilibrium constant (K) is halved. The value of the equilibrium constant (K) remains the same. The value of the equilibrium constant (K) changes unpredictably.
Answer:
The value of the equilibrium constant (K) remains the same.
Explanation:
A state of dynamic equilibrium is said to have been achieved in a reaction system when the rate of forward reaction equals the rate of reverse reaction.
At equilibrium, doubling the initial concentration of reactants have no effect on the equilibrium constant K. The equilibrium will rather shift to the left or right as required in order to annul the constraint.
Answer:
C
Explanation:
What are the two ways ocean acidification affects marine life?
Answer:
1) harm life forms that rely on carbonate-based shells and skeletons, 2) harm organisms sensitive to acidity
Explanation:
Answer:
Ocean acidification can negatively affect marine life, causing organisms' shells and skeletons made from calcium carbonate to dissolve.
Explanation:the more acidic the ocean, the faster the shells dissolve.
The following compounds will
decompose on heating except
A Ag2CO3.
B. CaCO3.
C. K2CO3
D. PbCO.
E. ZnCO3
AnsThe option C is correct
Food undergoes both physical and chemical changes during digestion. Which parts of the digestive process listed below is a physical change that takes place in the mouth?
Answer:
To answer your question use the code ICE on here to get your answer works every time for me hope this helps
Choose all the answers that apply.
Argon (Ar) is in group 18. Argon _____.
forms a salt when combined with a metal
has 18 electron shells
has properties similar to other elements in group 18
does not react readily with other elements
is part of the noble gas group
!(more than one answer)!
Answer: has properties similar to other elements in group 18, does not react readily with other elements, is part of the noble gas group
Explanation: I’ve done on edg before
What would happen to the rate of a reaction with rate law rate = k [NO]^2[H2] if
the concentration of NO were halved?
A. The rate would be four times larger.
B. The rate would also be halved.
C. The rate would be one-fourth.
D. The rate would be doubled.
The rate of a reaction would be one-fourth.
Further explanationGiven
Rate law-r₁ = k [NO]²[H2]
Required
The rate of a reaction
Solution
The reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.
Can be formulated:
Reaction: aA ---> bB
[tex]\large{\boxed{\boxed{\bold{v~=~-\frac{\Delta A}{\Delta t}}}}[/tex]
or
[tex]\large{\boxed{\boxed{\bold{v~=~+\frac{\Delta B}{\Delta t}}}}[/tex]
The concentration of NO were halved, so the rate :
[tex]\tt r_2=k[\dfrac{1}{2}No]^2[H_2]\\\\r_2=\dfrac{1}{4}k.[No]^2[H_2]\\\\r_2=\dfrac{1}{4}r_1[/tex]
Answer:
C. The rate would be one-fourth.
Another option would be:
The rate would be four times larger
Depending on what class you're taking.
Explanation:
List all the layers of the atmosphere and give one SENTENCE description or characteristic for each layers.
Answer:
Troposphere, stratosphere, mesosphere, and thermosphere.
Explanation:
Troposphere - It is the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.
Stratosphere - It is the layer of the earth's atmosphere above the troposphere, extending to about 32 miles (50 km) above the earth's surface (the lower boundary of the mesosphere).
Mesosphere - It is the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
Thermosphere - It is the region of the atmosphere above the mesosphere and below the height at which the atmosphere ceases to have the properties of a continuous medium. The thermosphere is characterized throughout by an increase in temperature with height.
Answer:
The First layer is the troposphere. The troposphere is what we live in. It creates weather for us. Second layer is the Stratosphere. You will find the ozone layer in it. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection. Third layer is Mesosphere. The Mesosphere is very important for earth's protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. Fourth layer is Thermosphere. The Thermosphere absorbs the sun radiation making it very hot.
Explanation:: I don't know if you include this one but the fifth layer is the Exosphere. Although the exosphere is the most distance layer of earth's atmosphere it is the layer that is the planet's first line of defense against the sun's rays. It is also the first layer to come into contact and protect the earth from meteors, asteroids, and cosmic rays.
name 3 collinear points
Answer:
These three points all lie on the same line. This line could be called 'Line AB', 'Line BA', 'Line AC', 'Line CA', 'Line BC', or 'LineCB' .
The only nonmetal in Group 14 is
A carbon.
B. oxygen.
C. nitrogen.
D. fluorine.
Answer:
carbon
Explanation:
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Chemical change
physical change
Answer:
Chemical
Explanation:
hi does anyone know what the answer to this is? i really need help
Answer:
The answer is
H. Met, Val, Lys, Arg, Gin, Ser
Explanation:
On the basis of Boyle's law, explain why
mountaineers carry oxygen cylinders with them.
Answer:
Boyle's Law states that 'at constant temperature, the pressure of a fixed amount of gas varies inversely with the volume of the gas. Mountaineers have to carry oxygen cylinders with them to restore normal breathing because at high altitude the density of air is less.
Explanation:
I majored in Chemistry.
Choose all that are correct about the elements in the column highlighted in blue
in the periodic table below (there are FOUR correct answers)
help !!!
Answer:
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will mark brainliest
Answer:
D. water
Hope it will help you......why Sodium and phosphorus are in the same period, but they have different atomic radii?
Answer:
Because sodium is on the left side of the PT and phosporus is on the right side. And atomis radius decreases from left to right.
Explanation:
What type of boundary exists along the coast of California?
Answer:
I exist ;-;
Explanation: