Answer:
8.7
Explanation:
A weak acid and a strong base will form a more basic salt.
2.0 is more acidic, you'll usually see this from a reaction between a strong acid and a weak base.
6.8 and 7.0 are neutral (or close to neutral) and are formed from reactions between weak acids and weak bases, or strong acids and strong bases.
Can animals and plants adapt to climate changes?
Answer:
Yes but will take a very very long time for them to adapt most will die but as gemeration passes they will get used to it
The picture below shows brown bears by the side of a river.
In this environment, the brown bears by the river are
Answer:
being peaceful
and washing up
Review the equation below.
2KClO3 Right arrow. 2KCl + 3O2
How many moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose?
2KClO3 --> 2KCl + 3O2
3 moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose.
Answer:
The answer is 3
Explanation:
I did the test on Edge
A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature
A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature is 105°C ?
Explanation:
[tex] \frac{V _{1} }{T _{1}} = \frac{V _{2} }{T _{2}} \\ \frac{(900)}{(27 + 273)} = \frac{V _{2}}{(105 + 273)} \\ V _{2} = \frac{340200}{300} \\ V _{2} = 1134 \: ml[/tex]
Answer is C
Zeke is attempting to react a piece of magnesium metal with sulfuric acid. The sulfuric acid is a 5M solution. What could Zeke do
to slow down the rate at which the magnesium will react with the acid?
A)
increase the temperature
B)
add a 10M sulfuric acid solution
9)
add water to the acid to decrease its molarity
D)
add more of the 5M sulfuric acid to the reaction
Answer:
c)
Explanation:
add water to the acid to decrease its molarity
BRAINLIEST IF RIGHT!! Write 200.0398 in 2 sig figs.
Answer:
20
step by step explanation:
1. For the reaction below, which change would cause the equilibrium
to shift to the right?
CH,(g) + 2H,S(g) + heat --
CS,(g) + 4H,(g)
(a) Decrease the concentration of H,S.
(b) Increase the pressure on the system.
(c) Increase the temperature of the system.
(d) Increase the concentration of CS,
(e) Decrease the concentration of CH.
option c is the correct answer
because the gas there will be evolved and caused the equilibrium to shift to right side
If , 1000 mL = 1L , what is 4.26L into mL?
Answer:
4260ml
Explanation:
the kinetic theory of matter states that the atoms of a diamond are. | A. Transparent B. Always Moving C. Reflectors of light D. Extremely Hard
Answer:
Always moving!
Explanation:
matter is composed of very small atoms and molecules that are always in contant motion
Which of the following is a property of carbon atoms?
They are chemically inert.
They have six valence electrons.
They readily give up two electrons
They are found in all living things.
They are found in all living things. Hence, option D is correct.
What is an atom?An atom is any particle of matter which contains at least one proton.
Carbon is stored in plants and trees. Plants take carbon dioxide from the atmosphere to make the building blocks of food during photosynthesis. Carbon is stored in the hydrosphere and dissolved in ocean water and lakes. Carbon is used by several organisms to produce shells.
Hence, option D is correct.
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El modelo atómico postulado por Shrodinger refiere la corteza atómica como una nube electrónica. Verdadero. Falso.
Answer:
Falso.
Explanation:
El modelo cuántico (no relativista) de Schrodinger, piensa a los electrones como ondas estacionarias, tal que la amplitud de dichas ondas decae muy rápidamente cuando se "alejaban" del radio atómico. (Es decir, habia poca probabilidad de que los electrones escaparan del radio atomico, y era por ello que se quedaban orbitando cerca del nucleo). Es decir, podríamos pensar en esto como una "nube de probabilidades" más que una nube electronica
La idea de nube electrónica realmente viene de modelos previos, como el de Rutherford o el de Bhor, los cuales eran modelos clásicos.
How many Joules of energy are given off when 50 grams of water are cooled from 65-50 degrees Celsius?
3200
3138
47.83
Answer:
3200
Explanation:
because it would book it up first to evaporate it next
Please show your work if possible!
Answer:
54.93 g/mol
Explanation:
a) the element with symbol Mn is known as Manganese and I figured it out by looking at the periodic table.
b) I took a look at the periodic table again, and seen how much the atomic mass is and from there I observed:
Mn= 54.938 g/mol
rounded is 54.94 g/mol
1.) What is the difference between renewable and nonrenewable resources?
2.) Explain why people need to begin using renewable resources instead of nonrenewable
resources.
Answer: 1.) renewable resources can be replenished as fast as they are used. Nonrenewable resources are unable to be replaced at the same rate at which they are used. 2.) nonrenewable energy sources will eventually run out, leaving people to figure out how to continue running their cars, homes, and busines. They must find alternative sources of energy. Since renewable energy resources that will never run out, it is a great option.
Explanation:
Anyone know this question
Help only 4 minutes left
Answer: the answer is d
Explanation: hurry and answer
Will give brainly NEED CHEM HELP
Answer:
X is hydrochloric acid solution, Z is sodium chloride solution and Y is sodium hydroxide solution.
Explanation:
I will try be as detailed as possible.
Litmus paper:
-Short summary: Bases will turn blue and red litmus papers to blue and acids will turn blue and red litmus papers to pink while the pink will remain pink.(Simple Mnemonic: You can say B from base turns blue litmus blue and the others are the opposite).
-Also, neutral solutions will have not cause any color change on litmus papers. This is because litmus papers have a color change in the presence of H+ from acids and Oh- from bases. So, blue litmus paper remains blue and red litmus paper remains pink.
-Hydrochloric acid solution is a strong monoprotic acid because it fully dissociates to produces H+ ions. Therefore, in the presence of blue and pink litmus papers it will turn the blue to pink and the pink will remain pink.
-Sodium chloride solution is a neutral solution because it dissociates to Na+ and Cl- which do not play a role in the color change.
-Sodium hydroxide solution is a strong monoprotic base hence it fully dissociates to produce OH- no wonder the high pH value.
pH value:
-Acids have a pH value is <7 while pH of neutral solutions is 7 and basic solutions is >7.
-So from this analogy we can say that hydrochloric acid solution is 2,sodium chloride solution is 7 and sodium hydroxide solution is 10.
Universal indicator:
-A universal indicator gives a more precise data as compared to litmus because it not only identifies the type of the solution (acidic, basic or neutral) it also tells us the strength of the solution by comparing the color of the solution when the universal indicator is added against the pH universal indicator scale.
-Unfortunately ,the colors are quite a lot and I cannot type all of them but you could search for 'pH universal indicator scale' to clearly see the whole thing.
-In the scale, you can see that after addition of the universal indicator, sodium chloride solution neutral solutions (pH7) will give a green color, hydrochloric acid solution (pH=2) which is a strong acidic solution will give a red color and sodium hydroxide solution (pH=10) which is a strong base will give a blue solution.
Reaction with Magnesium:
-I'd like to recommend also that you search for 'metal reactivity' so that you can be able to see the trend .
-A highly reactive metal can displace a low reactive metal but a low reactive metal cannot displace a high reactive metal under normal conditions.
-So, for sodium hydroxide and sodium chloride solutions with magnesium ,magnesium cannot displace sodium because sodium is one of the most reactive metals therefore there will be no change.
-For hydrochloric acid solution, the reaction will take place because Magnesium is more reactive than hydrogen thus can be able to displace hydrogen ions and form Magnesium chloride solution.
~I hope this will help. All the best:)
If 5.85 moles of CaCO3 are used in an experiment, how many moles of carbon dioxide are created? (Be sure to include units in your answer.) CaCO3 → CaO + CO2
Answer:
5.85 moles of carbon dioxide are created.
Explanation:
The balanced reaction is:
CaCO₃ → CaO + CO₂
By stoichiometry of the reaction (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:
CaCO₃: 1 mole CaO: 1 moleCO₂: 1 moleThen you can apply the following rule of three: if by stoichiometry 1 mole of CaCO₃ produces 1 mole of CO₂, 5.85 moles of CaCO₃ will produce how many moles of CO₂?
[tex]moles of CO_{2}=\frac{5.85 moles of CaCO_{3} *1mole of CO_{2} }{1 mole of CaCO_{3}}[/tex]
moles of CO₂= 5.85
5.85 moles of carbon dioxide are created.
If it requires 75.0mL of 0.500M NaOH to neutralize 165.0 mL of an hcl solution what is the concentration of the hcl solution
Answer:
0.027 M HCl
Explanation:
The chemical equation of the neutralization is:
1 NaOH + 1 HCl -> 1 H2O + 1 NaCl
Because the ratio of NaOH and HCl is 1:1 you can use the M1V1=M2V2 formula.
(75 mL)(0.5 M NaOH) = (165 mL)(M HCl)
It requires 0.027 M HCl.
Please help, lots of points!
If you were working for a beverage company, which molarity would you recommend, and what directions for mixing would you create for the drink package? Support your claims using the data you collected.
The 1.0 M beverage solution which is mixed by stirring would be the best molarity based on the data collected.
What is a beverage?A beverage is a liquid other than water which is consumed by humans to provide the body with energy and nutrients as well as to quench thirst.
A good quality beverage is sweet, fluid and clear.
From the data in the table, the molarity that meets these criteria is 1.0 M with stirring.
Therefore, I would recommend the 1.0 M beverage solution which is mixed by stirring.
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HELP! Calculate the pH of the following solutions:
a) [OH-] = 3.1x10^-8 M
pH = 7.51
pH = 3.18
pH = 8.00
pH = 6.49
pH = 3.10
b) [H3O+] = 5.2x10^-7 M
pH = 7.72
pH = 7.00
pH = 6.28
pH = 5.27
pH = 5.20
c) [OH-] = 5.9x10^-5 M
pH = 5.00
pH = 5.90
pH = 4.23
pH = 5.59
pH = 9.77
d) [OH-] = 5.9x10^-3 M
Answer:
Adding base causes the pH of a solution to increase
pH is a measure of the hydrogen ion concentration of a system. Solutions with a low pH possess a high concentration of hydrogen ions, while solutions with a high pH possess a low concentration of hydrogen ions. To increase the pH of a solution, base can be added to it. Base will release hydroxide ions (OH-) in the solution which will neutralize or reduce the H+ ions concentration in the solution. This way the pH is increased.
Explanation:
Which is NOT a way to accelerate an object? *
do not disturb it
speed it up
change it’s direction
slow it down
WILL GIVE BRAINLIEST PLZ HELP!!!!!!
Answer:
D
Explanation:
The picture depicts the data of the chemical, explaining that as the temperature rises, the chemical reaction rate would increase as well.
A titration is completed using 10.0 mL of 0.50 M HCl and an unknown concentration of NaOH solution. If the equivalence point is reached when exactly 20.0 mL of the NaOH solution is added, what must the concentration of the NaOH solution be?
Answer:
0.172 M
Explanation:
A gas occupies a volume of 60 L at a temperature of 0.5 K. What will the volume be at 4 K?
Answer:
480 L
Explanation:
In order to solve this question, you should be familiar with gas laws. (I will attach a picture showing all of them under my answer.) In this question in particular, however, we only need Charles's Law because we're dealing with temperature and volume.
As we can see, Charles's Law is:
[tex]\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]
or, initial volume over initial temperature equals final volume over final temperature.
In this question, 60 L is our initial volume, and 0.5 K is our initial temperature (K being Kelvin). We are only given 4 K as our final temperature. We are asked to solve for the final volume. Let's set up the equation and solve for [tex]V_{2}[/tex]:
--------------------------------------------------------------------------------------------------------------
(60) / (0.5) = [tex]V_{2}[/tex] / (4)
↓
120 = [tex]V_{2}[/tex] / 4
×4 ×4
↓
[tex]V_{2}[/tex] = 480 L
--------------------------------------------------------------------------------------------------------------
There's our answer! Feel free to comment if you have any questions about my answer :)
True or false gases have no mass
Answer:
Gases have mass, because they are made up molecules which have mass
In the given question, the given statement about gases have no mass is false.
The amount of substance in a thing is measured by mass, which is a physical attribute of matter. It is usually expressed in grams (g) or kilograms (kg).
Gases do have mass. The statement is false because gases consist of molecules that have mass.
Various ways can be used to determine the mass of a gas, such as weighing the container in which the gas is contained before and afterwards the gas is supplied. Additionally, the ideal gas law,[tex]\rm PV = nRT[/tex], includes the variable "n" which represents the number of moles of gas, indicating that gases do indeed have mass.Therefore, the given statement is false about gases having no mass.
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If two half lives have passed since a scientist collected a 1.00- gram sample of a U-235, how much U-235 is left now?
answers for most finals chem test questions (10th)
Answer:
one quarter of the original amount, so 0.25 g
Explanation:
Answer:
C
Explanation:
Which of the following isotopes have 8 neutrons in the nucleus?
O-15
O-17
C-13
C-14
Answer:
C-14 have 8 neutrons in the nucleus.
Carbon atoms with 8 neutrons have an atomic mass of 14 (6 protons + 8 neutrons = 14), so this isotope of carbon is named carbon-14.
hope it helps :)
Explanation:
Answer:
its d
Explanation:
edge 21
1. Which is not a characteristic common to all minerals?
Answer:
metallic luster orderly crystalline structure solid substance.
Explanation:
What does all matter have in common?
A.
It is made up of atoms.
B.
It is made up of molecules.
C.
It is all solid.
D.
It is too small to see.