Answer:
13.9atm
Explanation:
Use Boyle's Law: P1V1 = P2V2
Manipulate the equation: P2 = P1V1/V2
Substitute the values: P2 = (1.31atm)(5.51L)/0.520L
P2 = 13.88096atm
Optionally round to 3 sig figs to get 13.9atm
Cho 4g CuO vào dung dịch axit clohidric 10% thì phản ứng vừa đủ.
a/ Viết PThh
b/ tính khối lượng muối sinh ra
c/ tính nồng độ % dung dịch sau phản ứng
Answer:
Explanation:
a. CuO+ 2HCl⇒CuCl2+ H2O
b. [tex]n_{CuO}[/tex]= [tex]\frac{4}{80}[/tex]= 0,05 (mol)
⇒[tex]n_{CuCl2}[/tex]= [tex]n_{CuO}[/tex]=0,05 mol
⇒[tex]m_{CuCl2}[/tex]= 0,05×135=6,75 (g)
c. [tex]n_{HCl}[/tex]=2× [tex]n_{CuO}[/tex]=0,1 (mol)
⇒[tex]m_{HCl}[/tex]= 0,1×36,5= 3,65 (g)
⇒[tex]m_{dd HCl}[/tex]= [tex]\frac{m_{HCl}}{10}[/tex]×100=36,5 (g)
⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=[tex]\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }[/tex]×100=[tex]\frac{6,75}{36,5+4}[/tex] ×100≈ 16,67%
Which action occurs at an electrode of a galvanic cell?(1 point)
a) anion flow
b) anion transfer
c) electron flow
d) electron transfer
Answer:
Electron Transfer OR Electron Flow.
Explanation:
I'm not 100 percent im sorry
Electron transfer occurs at an electrode of a galvanic cell
A Galvanic cell converts chemical energy into electrical energy.
There are two electrodes in a galvanic cell which are anode and cathode. The electrodes is where electron transfer occurs.
The anode is the electrode at which the oxidation (loss of electron) occurs whereas the cathode is the electrode at which the reduction (gain of electrons) occurs.
Find more at: https://brainly.com/question/3186530
what waves can pass through a bell jar?
Answer:heat waves
Explanation:
a. What is the oxidation state of an element? (1 point)
Answer:
he total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.
Explanation:
plssssssssssssss like and brainiest
Can you decompose a Single displacement reaction?
Determine the average velocity of one person
Answer:
The average velocity calculator uses the formula that shows the average velocity (v) equals the sum of the final velocity (v) and the initial velocity (u), divided by 2.
Explanation:
why did bohr revise rutherford's model of the atom
Answer:
Bohr Atomic Model : In 1913 Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus. ... To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.
. When a newspaper is left in direct sunlight for a few days, the paper begins to turn yellow. The yellow
color is evidence of a
a physical property b, chemical property
c. physical change d. chemical change
4. What describes matter based on its ability to change into new matter with different properties?
a. A chemical change
b. A physical property
c. A chemical property
d. A physical changE
Physical Change
It is being changed by the sun
Explain why an atom with an electron configuration of 1s2,2s2,2p6,3s2,3p3 has 3 valence electrons despite having 5 electrons in its third energy level.
Answer:
Silicon
Explanation:
How are heterogeneous mixtures and solutions the same?How are they different?
Hello soysans!
Heterogeneous mixtures and solutions are, well....mixtures.
Solutions are a type of homogeneous mixtures.
Now, what are homogeneous mixtures? Homogeneous mixtures are mixtures that are uniformly spread throughout. They have an even distribution of components. The particles are soluble & too fine to be seen be seen by the naked eye.
On the other hand, heterogeneous mixtures are mixtures that are non-uniformly spread throughout. They have an unequal composition & the particles are big enough to be seen by the naked eye.
Solutions (homogeneous mixtures) & heterogeneous mixtures have a lot of similarities & dissimilarities between them.
Similarities (How are heterogeneous mixtures and solutions the same?) :
Homogeneous mixtures & heterogeneous mixtures are mixtures, i.e, they are made up of 2 or more particles/components mixed together.Dissimilarities (How are they different?) :
Heterogeneous mixtures are non-uniformly scattered while homogeneous mixtures are uniformly scattered.Heterogeneous mixtures have huge particles while particles in homogeneous mixtures are very small.Heterogeneous mixtures can scatter light (tyndall effect) but homogeneous mixtures cannot.___________________
[tex]\mathfrak{Lucazz}[/tex]
HEY CAN ANYONE PLS ANSWER DIS IN UR OWN WORDS!!!!!
Answer:
1. They debated about many things.
2. Greek philosophers debated about things. They did not have a scientific/experiment based approach to studying nature. They did not have tools.
3. Democritus
4. Democritus had the basic idea of atoms, even though he had no experimental evidence to support his thinking.
5. taught that there were substances called atoms and that these atoms made up all material things. The atoms were unchangeable, indestructible, and always existed.
Explanation:
hope this helps
Which action occurs at an electrode of a galvanic cell?(1 point) plz help
anion flow
anion transfer
electron flow
electron transfer
Answer:
i think ur answer would be this one electron flow
Explanation:
drag each tile to the correct location on the concept map
Answer:
I need a picture to help
Explanation:
HELPP FILL THE BLANKS QUICK!!! I mark Brainly ’ Remember! Physical change:
Properties remain the______________________
.
_____________________are
.
_____ _________substances are formed.
In a chemical change, the___________
change and the result is__________(can’t go back)
______________New substances produced in a chemical reaction have different______________and
_______________
properties from the original substance.
When chemical bonds break, atoms rearrange, and new bonds form, a______________
has occurred.
When a chemical reaction occurs between two liquids that form a solid, a_____________
is formed.
Properties remain the same
In chemical change, the bonds change and the result is permanent. New substances produced in a chemical, reaction have different bonds and properties from the original substance.
When chemical bonds break..... a chemical change has occurred.
When a chemical reaction occurs between..... a physical change has occurred.
A solid object with the density of 2.8 g/mL is placed in water. What will most likely happen?
(a) It will dissolve.
(b) It will float.
(c) It will sink.
(d) It will melt.
Thanks!
Answer:
When a solid with the density of 2.8 g/mL is placed in water, it will sink.
1. What are five examples of observable properties?
Answer:
Color
Size
Texture
Shape
Odor
Hardness
Physical state of matter (whether it is a liquid, solid, or gas)
Explanation:
go ogle
Precautions to be taken when is experimenting the boiling point of liquids
I need help. How do you solve this ?
Answer:
it's number four 122.36
Explanation:
54.87% of 223 is 122.36
high
incomplete
low
metal
nonmetal
nonmetals
oppositely
share
solids
Atoms will combine with each in order to become more chemically stable. Compounds are formed between two atoms that have
drag and drop answer here outer energy levels. The two types of compounds that can be formed between atoms are ionic and covalent.
Ionic compounds are formed between two drag and drop answer here charged atoms. Ionic compounds contain a drag and drop answer here ion and a
drag and drop answer here ion. Metals will lose electrons to form positive ions and nonmetals will gain electrons to form negative ions. These
oppositely charge ions are very attracted to each other and form very strong bonds as a result. Ionic compounds are characterized by crystalline
structure, drag and drop answer here melting and boiling points, and are drag and drop answer here at room temperature.
Two drag and drop answer here will combine to form covalent compounds. Covalent compounds are formed when two atoms drag and drop answer here
one or more pairs of electrons. The force of attraction between the nonmetals is relatively weak. Covalent compounds are characterized by
drag and drop answer here melting and boiling points and can be gases, liquids, or soft solids at room temperature.
Chemical and Physical Properties
Answer:
Chemical bonds are forces that hold atoms together to make compounds or molecules. ... This type of bond forms most frequently between two non- metals
Explanation:
Distinguish between efficiency and mechanical advantage.
Answer:
I think the answer is Mechanical advantage is a measure of how much your force is multipled efficiency is measure of how much of the work you do actually goes to moving the thing you are trying to move.
Adding more pulleys may increase the mechanical advantage but, it also increases the amount of extra stuff you are moving.
if it help you please mark me as a Brainlist.
Describe the main energy level shape and of the 2p * orbital
Answer:
The letters, s, p, d, and f designate the shape of the orbital. (The shape is a consequence of the magnitude of the electron's angular momentum, resulting from its angular motion.) An s orbital is spherical with its centre at the nucleus.
What causes electric shock?
A. Watts
B. Amperage
C. Voltage
D. Current
Suppose you wish to jump horizontally and in order for you to jump a distance of 4 feet horizontally, you must exert a force of 200 N. When you are standing on the ground, you have no trouble jumping 4 feet horizontally. If you are standing in a canoe, however, and you need to jump 4 feet to reach the pier, you will surely fall into the lake. Why is it that you cannot jump 4 feet out of a canoe when you can easily do this when on land?
Answer: because it is
Explanation: to be honest is just is there is not explanation needed
WILL MARK BRAINLIST IF RIGHT
What coefficient should be used for oxygen gas to correctly balance this equation
NO LINKS
Since 1:1:3 is the smallest ratio that can be used to balance the chemical equation using whole number coefficients, you can thus say that the oxygen molecule has a coefficient of 3 in the balanced chemical equation that describes the decomposition of magnesium chlorate.
PLEASE HELP!!!! DUE SOON!!
Use the portion of the periodic table shown below to answer the questions.
A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.
Part 1: Name two elements that have the same properties as magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points)
Answer:
Explanation:
Calcium and Beryllium are similar to Magnesium because all the three elements belong to the same group and have 2 valence electrons in their outer shell.
Potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element.
A rod made up of a single element is used to heat water using electricity. To which group does this element probably belong to?
A. Group 2
B. Group 17
C. Group 1
D. Group 3-12
Answer:d
Explanation:
answer is d for plato users
why do you think some countries are still encouraging population growth
Some countries encourage it to maintain their population because people die and thats the truth, thats the first reason and second reason is because more population will boost their economy and business but some other country dont encourage it due to the reasons of chaos and crowds with many population.
why the Titanic sunk due to density.
Answer:
When the titanic hit the iceberg, water rushed into the ships hull and displaced the air. The average density of the water and the steel ship was greater than the density of the water. The result of this caused the titanic to sink to the bottom of the Atlantic.
I need help writing two paragraph.
Four substances are involved in both photosynthesis and cellular respiration. They are sugars, water, oxygen, and carbon dioxide. Energy is also transformed from one type to another. Describe what happens to these four substances, light energy, and chemical energy during photosynthesis. Then write a simple equation for the substances and another for energy, using words and arrows to illustrate these changes.
Answer:
Pangasinan State University Urdaneta City Campus Bernadette B. Familiar BSCE 1A Gen. Chemistry Problems Caused By Chemistry Chemistry is of great significant value and is not dime-a-dozen. Chemistry is ubiquitotoday would not have been possible. Has an effigy of the world without t
does cream cheese frosting have to be refrigerated?
Answer:
Yes its true because cream cheese has to be refrigerated it will spoil it just depends on how long its out.
Explanation:
