Answers
Answer:
aaaaaaaaaaaaaaaaaaaaaaa
Related Questions
Give two examples of compounds exhibiting double covalent bonds between atoms of its constituent molecules and explain why they form a double covalent bond.
Answers
Answer: Due to the sharing of electrons, they exhibit characteristic physical properties that ... Here, we discuss two classes of compounds based on the bond type that ... Covalent bonds are characterized by the sharing of electrons between two or ... Describe the types of orbital overlap that occur in single, double, and triple bonds
Explanation: That's what I think it is.
Geologic Time Scale
Time Period Duration (Millions of Years Ago)
Cenozoic 66-0
Mesozoic 252-66
Paleozoic 541-252
According to the scale, what time period are we in today?
a
Cenozoic
b
Mesozoic
c
Paleozoic
d
None of these
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which star is the dimmest HELP PLEASE
Answers
Answer:
Bellatrix.
Explanation:
Answer:
vega i believe just look at the number and see what kinda is less ykwim
which element is more reactive out of oxygen and sulphur
Answers
Answer:
Oxygen
Explanation:
Oxygen is more reactive because it has small atomic size which has high tendency to attract more electrons.
9. Which zone of a flame does a goldsmith use for melting gold and silver and why?
Answers
Answer:
Outermost zone
Explanation:
Because the outermost zone is the hottest part of the flame.
Answer:
outer most zone
Explanation:
The outermost zone is used by a goldsmith for melting gold and silver. This is because it is the hottest zone of the flame where complete combustion takes place.
Which of these changes to a modern lifestyle would promote the
development of more-sustainable practices in the world food system?
O A. Switching from chicken to beef
B. Eating fewer processed foods
O C. Buying tropical fruits
D. Eating fresh vegetables year-round
Answers
Eating fewer processed foods would promote the development of more-sustainable practices in the world food system.
What are Processed food?
This is the food which has undergone some degree of alteration during preparation such addition of preservatives etc.
Eating less of it will ensure that more sustainable practices in the world food system are promoted.
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how many sig figs are in 0.0093
Answers
Answer:
there are two significant figures
Explanation:
Answer:
there are two
Explanation:
because the zeros dont count
How is energy causing motion or creating a change in this image? (2 points)
Energy from fuel allows the plant to grow and make its own food.
Energy from the sun allows the plant to grow and make its own food.
Energy from the wind allows the plant to grow and make its own food.
Energy from the water allows the plant to grow and make its own food.
Answers
Answer:
Energy from the sun allows the plant to grow and make its own food.
Explanation:
From this image, we clearly see the leaves exposed to sun which supplies solar energy to the plant.
Plants are capable of producing their food from inorganic chemical sources. In the process of photosynthesis, plants takes carbon dioxide and water in the presence of sunlight to manufacture their own food. The food provides energy that allows the plant to grow.Answer:
Energy from the sun allows the plant to grow and make its own food
Explanation:
How do you know when the endpoint is reached in a titration? When does this occur?
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Before a titration, indicator is added to the analyte (which is in the flask, and usually the chemical of unknown concentration). The titrant is then placed in a burette and slowly titrated into the analyte. When the indicator changes color is when the endpoint of the titration has been reached. This occurs (approximately) at the equivalence point.
What happens to light waves as they enter the Earth's atmosphere?
Answers
Farmers use conservation practices such as crop rotation to insure that their crops are sustainable. Crop rotation is the process of moving crops to a new location to get the nutrients from the soil needed for that specific crop to grow. What conclusion can be drawn if farmers do not use soil conservation practices such as crop rotation?
A.
If farmers do not use soil conservation practices, the topsoil, which contains weathered rocks, will not be fertile to promote plant growth because of loss of nutrients from the soil.
B.
If farmers do not use soil conservation practices, the topsoil, which contains weathered rocks, will be fertile to promote plant growth because of the loss of nutrients from the soil.
C.
If farmers do not use soil conservation practices, the topsoil, which contains humus, will not be fertile to promote plant growth because of the loss of nutrients from the soil.
D.
If farmers do not use soil conservation practices, the topsoil, which contains humus, will be fertile to promote plant growth because of the loss of nutrients from the soil.
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Answer:
C. If farmers do not use soil conservation practices, the topsoil, which contains humus, will not be fertile to promote plant growth because of the loss of nutrients from the soil.
Explanation:
The top soil is rich in humus and not weathered materials. It is not close to the bedrock. Rather, the topsoil is rich in organic matter and it is present as humus in the soil.
If crop rotation is not being practiced, the soil's nutrients would be highly depleted without replenishing them back. With crop rotation the top soil can be made more fertile when it is left uncultivated for a period of time. Instead of heavily relying on a single piece of land, crops can rotated on a timed basis so that soils will have enough time to restore their nutrients.5. How many moles are equal to 2.4 x 1023 formula units of sodium chloride?
Answers
Answer:
The answer is 0.4 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{2.4 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.4}{6.02} \\ = 0.398671096....[/tex]
We have the final answer as
0.4 molesHope this helps you
PLEASE HELPPP !!!!!!!!!!!!!!!!
Answers
Answer:
I think it's the last one I'm sorry if it's wrong
Explanation:
it sounds like it fits
How many moles are equal to 1.3 x 1024 atoms of aluminum?
Answers
Answer:
The answer is 2.16 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{1.3 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 2.159468...[/tex]
We have the final answer as
2.16 molesHope this helps you
How many protons, electrons, and neutrons does an atom with an atomic
number 50and a mass number 120 contain?
Answers
Answer:
Protons: 50
Neutrons: 70
Electrons: 50
Explanation:
atomic number 50 is
Tin(Sn)
Protons=50
Neutrons=69
Elections=50
Can someone please help me with this?--20 pts!
In Compound A, Element W has an electronegativity of 3.0, and Element X has an electronegativity of 2.0.
In Compound B, Element Y has an electronegativity of 1.2, and Element Z has an electronegativity of 3.4.
Which statement correctly identifies the ionic compound and describes the use of electronegativity in determining this?
Compound B is ionic. The electronegativity difference is 2.2, which can be determined by subtracting the electronegativity of Element Y from that of Element Z. Electronegativity differences greater than 1.7 indicate ionic bonds.
Compound B is ionic. The electronegativity difference is 4.6, which can be determined by adding the electronegativity of Element Y to that of Element Z. Electronegativity differences less than 5.0 indicate ionic bonds.
Compound A is ionic. The electronegativity difference is 5.0, which can be determined by adding the electronegativity of Element W to that of Element X. Electronegativity differences greater than or equal to 5.0 indicate ionic bonds.
Compound A is ionic. The electronegativity difference is 1.0, which can be determined by subtracting the electronegativity of Element X from that of Element W. Electronegativity differences less than 1.7 indicate ionic bonds.
Answers
Answer:
Compound B is ionic. The electronegativity difference is 2.2, which can be determined by subtracting the electronegativity of Element Y from that of Element Z. Electronegativity differences greater than 1.7 indicate ionic bonds.
Hope that helps.
The statement correctly identifies the ionic compound and describes the use of electronegativity in determining this is Compound B is ionic. The electronegativity difference is 2.2, which can be determined by subtracting the electronegativity of Element Y from that of Element Z. Electronegativity differences greater than 1.7 indicate ionic bonds. Therefore, option A is correct.
What is an ionic compound ?A chemical compound known as an ionic compound is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.
Ions are charged particles that occur when an atom (or group of atoms) receives or loses electrons. Ionic compounds are substances made of ions. When elements share electrons in a covalent connection to create molecules, they produce covalent or molecular compounds.
Ions form the bulk of an ionic composition. The ions are organized into a regular, repeating structure known as an ionic lattice. Because the ions are attracted to one another and arrange themselves in a predictable pattern with oppositely charged ions close to one another, a lattice is created.
Thus, option A is correct.
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Help please! A gas occupies 500 mL at 270 mm Hg and 55°C. If the pressure is changed to 1.8 atm and the temperature is
increased to 100°C, what is the new volume? Be sure to show the setup and the final answer and unit.
Show Your Work
Answers
Answer:
V₂ = 112.14 mL
Explanation:
Given data:
Initial volume = 500 mL
Initial pressure = 270 mmHg (270/760 =0.355 atm)
Initial temperature = 55 °C (55 +273 = 328 K)
Final temperature = 100°C (100+273 = 373 K)
Final volume = ?
Final pressure = 1.8 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 0.355 atm × 500mL × 373 K / 328 K × 1.8 atm
V₂ = 66207.5 atm .mL. K / 590.4 K.atm
V₂ = 112.14 mL
it!
t
Calculate How old was the tree when it was
cut down?
Answers
Answer:
No numbers how are we supposed to know
Explanation:
Which of the following is an indication of a physical change?
O A. The formation of a new substance
O B. Giving off a smell
O C. A change in the shape of a substance
O D. The production of gas and heat
Answers
Answer:
A change in the shape of a substance
Explanation:
Because when ths shape of a sunstance changes , its physical appearance changes .A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.
wich if the following statements best describes why the mass of a bowling ball would not change if it were transported from earth to the moon?
gravity is constant forge
the bowling ball will adapt to the changes in gravity
matter is resistant and changes gravity
the amount of mattet in the bowling ball remains the same
Answers
Answer:
the amount of matter in the bowling ball remains the same
Explanation:
The reason why the mass of the bowling ball on earth and moon remains the same is that matter in the bowling ball remains the same.
Mass of any substance is the amount of matter it contains.
Since there is no loss in matter, the mass of the bowling ball anywhere in the universe will be the same. Only the weight changes due to differences in gravity.Record the mass of the object based on the reading from the triple-beam balance. The mass of the object is ____ grams.
Answers
Hello!
[tex]\large\boxed{167g}[/tex]
Looking at the balance, we see that:
The middle beam reads 100g.
The top beam reads 60g.
The bottom beam reads 7g.
Add all of the numbers together to get the total mass:
100 + 60 + 7 = 167g.
The mass of the object is 167 grams.
Explanation:
A triple beam balance is a mass measuring instrument used in labs to measure the mass of a substance. It unit in which it measures is grams. It consists of three beams which are: The middle beam has Increments of 100 grams The front beam has Increments from 0 grams to 10 grams The farther beam has Increments of 10 gramsGiven :
Readings of all the scales of three beams of the triple beam balance of an object.
To find :
The mass of object whose reading on triple beam balance is given.
Solution:
Middle beam reader at 100 grams
Front beam reader at 7 grams
Farther beam reader at 60 grams
The mass of object:
[tex]100 grams + 7 garms + 60 grams = 167 grams[/tex]
The mass of the object is 167 grams.
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Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined?
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Answer:
(The Formation Of Bands In A Crystal)
Which of the following is the correct formula For aluminum oxide?
A.AIO
B.AI3O2
C.OAI
D.AI2O3
Answers
Answer:
The answers D.
Explanation:
Answer:
Its D
Explanation:
Just took the Test.
Which of the following best describes a hypothesis?
A. An explanation that is supported by scientific data
B. A proven explanation for experimental results
c. A possible answer to a scientific question
D. A question about the natural world
please help i will give brainliest
Answers
NEED HELP ASAP!!!!!!!Instructions
Please complete the macromolecule chart using your notes and the PowerPoints. If you have trouble typing directly on the paper remember you probably need to download it first so it opens in a new window. Remember to save it with your name at the end so that I can tell whose paper it is. Than upload and submit. If you are having trouble, let me know.
Answers
Answer:
mouse
Explanation:
2.Chromosomes are____
Both A and B
Made of DNA
None of the above
Found in the nucleus of a cell
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Answer:
Both A and B
Explanation:
Answer: The answer is the last one: found in the nucleus of a cell
Explanation:
Each chromosome is made of protein and a single molecule of dna. As It is getting passed from the parents to the offspring the dna contains specific instructions that make each type of living thing unique.
How many molecules are in 210 grams of CO2?
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Answer:
30 molecules
Explanation:
easy
Is nucleus a plant or animals cell
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If the question is "is there a nucleus in a plant or an animal cell", then the answer is both plant and animal cells have a nucleus.
If the question is "is a nucleus a plant or animal cell", it is neither-- a nucleus is not a cell, but it is an organelle.
I hope this helped!
A gold coin contains 3.47 × 10^23
gold atoms.
What is the mass of the coin in grams?
Answers
Answer:
Mass = 114.26 g
Explanation:
Given data:
Number of gold atoms = 3.47×10²³ atoms
Mass in gram = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
3.47×10²³ atoms × 1 mol /6.022 × 10²³ atoms
0.58 mol
Mass of gold:
Mass = number of moles × molar mass
Mass = 0.58 mol × 197 g/mol
Mass = 114.26 g
. Which of the following statement is FALSE about gas particles? a. Gases expand to fill their container. b. Gases increase in movement when temperature increases Gases are in constant rapid motion. d. Gas particles are packed tightly together. please hurry
Answers
Answer:
D
Explanation: