Answer:
[tex]density = \frac{mass}{volume} \\ \\ density = \frac{20.015}{5.44} \\ \\ { \boxed{ \boxed{density = 3.679 \: g {cm}^{ - 3} }}}[/tex]
Why does magnesium chloride need to be molten in electrolysis
Answer:
this is from another brainliest answers.
Explanation:
Ionic compounds need to be molten or in solution for electrolysis to work. This is because the charged particles that make them up (ions) need to be free to move to the electrodes.
Plant Cell
5
F
G
20 points
Which parts are only found in plant cells?
D
А
С
-A
E
m
G
LL
D
B
С
Answer:
it's the chloroplast but I'm not sure which on is it it might be the F.
When sodium reacts with Iron(II)and chloride iron metal and sodium chloride are formed what are the coefficient used in this reaction?
Could any one help on this fill in questions
How can we regain the hardness of water by adding lime?
Answer:
Softening - In water softening, hydrated lime is used to remove carbonate "hardness" from the water. Hardness caused by other calcium and magnesium salts, called noncarbonate hardness, is generally treated by means of the lime-soda process, which entails the precipitation of magnesium by lime.
Which gas law states that the volume of gas is directly proportional to its temperature
Answer: Charles' Law
Explanation: At constant pressure, Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale. [0 Kelvin = 0 Liters gas]
Explanation:
. Charles’s law—named for J.-A.-C. Charles (1746–1823)—states that, at constant pressure, the volume V of a gas is directly proportional to its absolute (Kelvin) temperature T, or V/T = k.
The trachea connects the mouth to the stomach.
True or False?
HEEEEEELLLLLPPPPPPPPPPPPP MEEEEEEEEEEE :(
Answer:
false because trachea connects to the lungs and oesophagus connects from the mouth to the stomach
Answer:
false
Explanation:
It starts with the mouth. The esophagus is a long tube that connects the mouth to the stomach, which is within the ribcage. The stomach is a muscular bag-like structure and forms a J-shaped pouch and is located under the ribcage. The stomach connects to the small intestine.
Lavoisier made an important contribution to chemistry by _____.
developing the atomic theory of matter
developing the law of conservation of matter
developing the law of multiple proportions
coining the term "atom"
Answer:
developing the atomic theory of matter
Explanation:
(70 POINTS) PLEASE HELP ME YOU DONT HAVE TO WRITE 4 PARAGRAPHS JUST HRLP ME EXPLAIN A SCIENTIFIC THERORY
Choose a scientific theory and describe the theory. You will describe the theory in 2-to-4 well-written paragraphs. Who developed the theory? How did the scientist come up with the theory? Has the theory
changed over time? How has the theory impacted scientific thinking? Explain an experiment you could run to
test the theory, including the design and execution, and any observations you can make of the world around you related to the scientific theory. How do these observations support or refute the theory?
Answer:
well its def is : an explanation of observations or events based on knowledge gained from many observations and investigations
Explanation:
please help me with my question
A _____ movement tries to improve a part of society, usually through legal methods. a. Reactionary c. Conservative b. Revisionary d. Revolutionary Please select the best answer from the choices provided A B C D
Answer:
B.Revisionary
Explanation:
Revisionary movement usually use legal channels to seek change
A movement that tries to improve a part of society, usually through legal methods is a revisionary movement.
A revisionary movement always target the revision or improvement of the whole or part of the society. Many revisionary movements across the world are calling for different types of social changes such as gender equality and equal access to education.
Hence, a movement that tries to improve a part of society, usually through legal methods is a revisionary movement.
Learn more: https://brainly.com/question/1411414
1. Based on the data set and the true measured value being 28km.
A. Is this data accurate, precise, or both?
B. What is the average?
29km
28.3km
28.2km
27.22km
28.1257km
28km
27.8km
28.6km
28km
27.777777777km
Thank you!
What was the central goal of the author(s) of the Declaration of Independence?
A.
to announce to world leaders that the 13 colonies had formed the United States
B.
to define and describe the rights of the citizens living in the new country
C.
to establish rules for the creation of new states that wanted to join the new country
D.
to communicate their grievances to the British king about how he treated them
Answer:
D. to communicate their grievances to the British king about how he treated them
I just took the test and said this was the correct answer.
The central goal of the author(s) of the Declaration of Independence is to communicate their grievances to the British king about how he treated them. The correct option is D.
What is the Declaration of Independence?The declaration of independence tells three main ideas. These ideas are all men are equal, and everyone should get equal rights, liberties, and the pursuit of happiness. The main aim of the government should be to protect the rights of the people.
The main goal of the declaration of independence is to tell that energy human is equal, and that should not be discriminated don the basis of caste or gender. They should gate the liberty of doing and going anything and anywhere, respectively.
Thus, the D. communicated their grievances to the British king about how he treated them.
To learn more about the Declaration of Independence, refer to the link:
https://brainly.com/question/14578050
#SPJ2
Write the atomic symbols for nitrogen-14 and nitrogen-15
Answer:
hope this helps
Explanation:
Natural nitrogen (7N) consists of two stable isotopes: the vast majority (99.6%) of naturally occurring nitrogen is nitrogen-14, with the remainder being nitrogen-15. Fourteen radioisotopes are also known, with atomic masses ranging from 10 to 25, along with one nuclear isomer, 11mN.
H3N
Nitrogen-15 | H3N
advantages and disadvantages of chemistry
Answer:
Advantages of chemistry:-
•Basic knowledge of chemistry helps you to read and understand product labels.
•Chemistry can help you make informed decisions.
•Chemistry is at the heart of cooking. ...
•A command of chemistry can help keep you safe!
Disadvantages of chemistry:-
•It isn't a sustainable form of energy. ...
•It can be expensive.
•It can produce harmful waste.
•It can be used to create devastating weapons.
Suppose a person uses a microscope to look at a cell from the leaf of a tree.
Which structure would they see that would not be found in a cell from a fingernail?
O cilia
O chloroplasts
O ribosomes
O mitochondria
Answer:
Coloroplasts I hope it's right ❤️
what is the mass 2 moles of urea
Answer:
60.06 g/mol
The solute is urea, CO(NH2)2. Molar mass of urea: (12.01) + 16.00 + 2(14.01 + 2(1.008)) = 60.06 g/mol.
Explanation:
please mark me brainliestAnswer:
60.06 g/mol
Explanation:
the solution area,CO(NH2)2.molar mass urea:
(12.01)+16.00+2(14.01+2(1.008))=60.06g/mol
Which phrase is the best definition of matter?
A. The amount of physical material in an object
B. Anything that takes up space and has mass
C. Anything that can be measured
D. A particle made up of two or more atoms
SUE
The amount of physical material in an object
A block of metal has a volume of 13.4 in^3 and weighs 5.36 lb.
What is its density in grams per cubic centimeter?
Express the density in grams per cubic centimeter to three significant figures.
Answer:
2.5
Explanation:
13.4 by 5.36
Mass by volume
Answer:
11.1 grams per cubic cm
Explanation:
Volume = 13.4 in^3 = 219.587 cm^3
Mass = 5.36 lb = 2431.255 gram
[tex]density = \frac{mass}{volume} \\ = \frac{2431.255}{219.587} \\ = 11.0719441 \\ \approx \: 11.1 \: grams \: per \: {cm}^{3} [/tex]
1. Name 3 elements that are found in the same family/group
Answer:
Lithium, Hydrogen, Sodium, or Oxygen, Sulfur, Selenium They are all in the same column. Find three elements in the same family and list them. 4. Oxygen, Carbon, Nitrogen, Aluminum, Silicon, Phosphorous They are all in the same row
Explanation:
Write this expression in its most simplified, factored form.
12x2y − 32xy + 8y
Answer:
[tex]12x {}^{2} y - 32xy + 8y[/tex]
first factorise out 4y :
[tex] = 4y( {3x}^{2} - 8x + 2)[/tex]
Bohr's model of the atom included a positively charged _____ orbited by negatively charged _____.
neutrons, electrons
electrons, protons
nucleus, protons
nucleus, electrons
What happens to elements when they combine together chemically ?
Answer:
When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).
Questi Which two methods do scientists use to gather information? O A. Observing the natural world OB. Following religious beliefs C. Expressing strong opinions D. Carrying out investigations SUBM
Answer:
A and D
Explanation:
Observation
Experimentation
Models
Analysis of existing data
what's is half life
Which of these would be called results
Counting fruit flies
Number of fruit flies
Seeing fruit flies on an apple
Wondering why fruit flies are on Apple
need help with 22 and 24
Answer:
22:
Formular:
[tex]atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\ [/tex]
substitute:
[tex]atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}[/tex]
23:
Same element is represented by same number of protons.
Answer:
6 protons. 6 protons
7 neutrons. 8 neutrons
6 electrons. 6 electrons
Note: Atoms with same proton number but different mass number are called isotopes
Which two features are used to describe matter?
om
Answer:
Physical properties are used to observe and describe matter. Physical properties can be observed or measured without changing the composition of matter. These are properties such as mass, weight, volume, and density.
(30 POINTS)
Which of the following increases the concentration of OH- ions?
Acid
Base
Water
Salt
Answer:
Acid btw I am new in Brainly
What is the scientific notation of 52,427
Answer:
Explanation:
im not sure
Answer:
5.2427*10^4
If rounding then 5.2*10^4
Explanation:
