18. Consider the information about carbon provided in Model 4.
a. Are diamonds and graphite made from the same element?
Answers
Answer:
yes
Explanation:
Related Questions
In a few minutes, you will work with your partner to create three dances—one for each of the three phases. Each dance will represent the molecular freedom of movement of that particular phase.
If needed, navigate back to My Work to refer to your homework from Lesson 1.4. Then, begin brainstorming ideas for movements that would show these phases.
Dance ideas for solids:
Dance ideas for liquids:
Dance ideas for gases:
Answers
IS N2 (diatomic molecule of nitrogen considered a chemical compound can it be split into two or more simpler substances?
Answers
Give 2 reason why cryolite is used
Answers
Give two reasons why cryolite is used in the electrolysis of ...https://www.mytutor.co.uk › answers › GCSE › Chemistry
Please help. A 208 g sample of sodium-24 decays. How much of this radioactive isotope will remain after 3 half
lifes?
Answers
Answer: The information about sequential order of the event occurred in the past can be obtained by using only relative dating method.
Explanation:
Relative dating method doesn’t give information about when it happened. It provides sequential order of the events. It is the art of deciding the overall happening of past occasions (i.e., the age of an item in contrast with another), without fundamentally deciding their outright age (for example evaluated age).
In topography, shake or shallow stores, fossils and lithologies can be utilized to correspond one stratigraphic segment with another.
Joe the scientist wants to figure out if the weight of a bowling ball will affect how fast it rolls down a ramp. Joe builds a 15 foot long ramp that is 5 feet tall at the top. Joe believes that if he rolls the 6 pound bowling ball from the top of the ramp, then it will roll the fastest. Joe then gets several bowling balls that are identical except for their weight. The different weights are 6 pounds, 8 pounds, 10 pounds, 12 pounds, and 14 pounds. Joe starts by placing the 6 pound ball at the top of the ramp and he starts the timer at the same time he lets go. He stops the timer when the ball reaches the bottom of the ramp. Joe repeats this process for all of the bowling balls. Joe repeats this process for all of the bowling balls.
What’s the IV, DV, hypothesis and constant ?
Answers
Answer:
IV: The weight of the ball
DV: Time it takes for the ball to roll from top to bottom
Hypothesis: 6 pound bowling ball from the top of the ramp, then it will roll the fastest.
Constant: I dont know
Explanation:
I need the answer of these questions
Answers
Answer: 33. Lattice
35. Covalent
38. Triple covalent bond
how long do fresh cranberries last in the refrigerator?
Answers
Answer:
Three to four weeks
Explanation: I had cranberries and In like four weeks my mom forced me to get rid of them. They do stink when rotten ;(
2. How many of valence electrons do the elements in column 4 have? Are these elements very reactive?
Explain your answer.
Answers
Answer:
4
Explanation:
Elements in group 14 have 4 valence electrons. Meaning that to achieve a stable octet they need to either gain or lose 4 electrons in total.
At a pressure of 125 atm, a sample of a gas has a volume of 150 L. What pressure does it have when the gas is compressed to 40 L? show work
Answers
Answer:
???
Explanation:
I have no clue sorry
Phosphorus reacts with oxygen to form diphosphorus pentoxide: 4 P(s) 5 O 2(g) ---> 2 P 2O 5(s) If 0.97 moles of phosphorus are reacted how many moles of P 2O 5 are produced
Answers
4P(s)+5O2(g)-->2P2O5(s)
4 moles of P=2moles of P2O5
0.97 moles of P=(2*0.97)/4
=0.485 moles
A copper sulphate solution contained 0.100 moles of copper sulphate dissolved in 0.500 dm cubed of water. Calculate the mass of copper sulphate in 30.0cm cubed of this solution. Relative formula mass (mr): CuSO4= 159.5
Answers
Answer:
cm^3 —> dm^3
divide by 1000
159.5 — Mr of CuSO4
n (moles in mol) = c (concentration in mol/dm^3) * v (volume in dm^3)
0.100 mol of CuSO4 dissolved in 0.5dm^3 of water
calculate for mass of CuSO4 dissolved in 0.03dm^3 (30cm^3) of the solution
n = m/Mr
m = n*Mr
if 0.1 mol is dissolved in 0.5 dm^3 of water
0.5/0.03 ≈ 16.66666667
0.1 = 0.05
0.1 / 16.66666667 = 0.006
0.5 / 16.66666667 = 0.03
0.006 (mol of CuSO4) = 0.03 (dm^3 solution)
0.006 * 159.5 = 0.957 g
I think this is the answer
The mass copper sulphate CuSO₄ in 30ml solution is 957.6g.
How to determine the mass of copper sulphate in the given solution?To determine the mass of copper sulphate in the given solution, compare both the molarity given
M₁V₁=M₂V₂
n₁/V1=n₂/V2
0.1/0.5=n₂/30 cm³=ml
n₂=6 moles
6×159.5=957.6g
Multiply the calculated moles with the relative mass/molecular mass to get the mass of CuSO₄.
hence, the mass of CuSO₄ is 957.6g
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what happens to the size of the an atom when it becomes an negative ion?
Answers
Answer
The negative ion is larger than the original atom.
Explanation:
This means that with fewer electrons but the same number of positive protons, the size of the ionic radius will decrease.
I hope this helped!
what is the total number of valence electrons in ethyl acetate?
Answers
Answer: There are 36 valence electrons.
Explanation:
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the valence electrons of C₄H₈O₂ is 32.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
A valence electron is a negatively charged particle, located in the outermost shell of an atom, that can be transferred to or shared with another atom. To calculate total valence electrons in C₄H₈O₂, we need to add the individual valence electrons of each element.
Valence electrons of C₄H₈O₂= {valence electrons of C×4}+{valence electrons of H×4}+{valence electrons of O×2}
Valence electrons of C₄H₈O₂= {4×4}+{1×4}+{6×2}
Valence electrons of C₄H₈O₂=32
Therefore, the valence electrons of C₄H₈O₂ is 32.
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The table below gives the atomic mass and relative abundance values for the three isotopes of element M.
Relative abundance (%) Atomic mass (amu)
78.99 23.9850
10.00 24.9858
11.01 25.9826
What is the average atomic mass (in amu) of element M?
2.86
5.36
24.30
24.98
Answers
Answer:
24.30
Explanation:
Multiply the relative abundance by the atomic mass of each isotope, add the results together, and divide by 100. Then round to the correct amount of significant figures.
(78.99 x 23.9850) + (10.00 x 24.9858) + (11.01 x 25.9826)/100
24.30 is the average atomic mass (in amu) of element M.
What is an atomic mass?Atomic mass is the quantity of matter contained in an atom of an element.
Multiply the relative abundance by the atomic mass of each isotope, add the results together, and divide by 100. Then round to the correct amount of significant figures.
(78.99 x 23.9850) + (10.00 x 24.9858) + (11.01 x 25.9826)
2430.501576 ÷ 100
24.30
Hence, 24.30 is the average atomic mass (in amu) of element M.
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20
How do you solve this ?
Answers
Answer:
eight oxygen atoms
Explanation:
This formula shows that in one mole of this compound, there are 3 moles of Ca atoms that combine with 2 moles of the PO4(phosphate) groups, which gives a total of 2 moles of P atoms and 8 moles of 0 atoms.
Choose all the answers that apply. According to Newton's second law of motion: objects at rest will remain at rest unless acted upon by an outside force the greater the magnitude of force, the faster the acceleration mass has an inverse relationship with acceleration every action has an equal and opposite reaction acceleration is caused by unbalanced forces
Answers
Answer: The answers aplicable would be
1) The greater magnitude of force, the faster the acceleration.
2) Acceleration is caused by unbalanced forces.
(Please someone help me!) (No links!)
Match the following motions to these graphs:
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Answer:
Speeding up: graph 6
Slowing down: graph 1
Fast Constant Speed, forward: graph 2
Slow constant speed, forward: graph 5
Fast constant speed, Backward: graph 4
Slow constant speed, Backward: graph 7
Sitting still: graph 3
(Im not 100% but this makes the most sense i think)
explain the factors that affect the separation of mixtures in amino acids
Answers
how many grams of water are needed to produce 250 j of energy when the temperature changes from 21 to 18.5
Answers
Answer:
So if you want to raise the temperature of that one gram from 19 to 35 degrees, that same gram will need 35 −19 = 16 times as much heat. And if you want to raise the temperature of 193 grams in stead of just 1 gram, you will need 193 times as much heat.
Explanation:
Which of the following statements about trash in the United States is FALSE? Each person produces about 2 kg of trash per day. There is nothing we can do to reduce the amount of trash we throw away. Most of our trash ends up in landfills. Some of the things we throw away are very hazardous.
Answers
Answer:
There is nothing we can do to reduce the amount of trash we throw away.
Explanation:
We can reuse and recycle the trash that we throw away, so we can do something to reduce the amount of trash that we throw
In what respect does 3s sub-Shell differ from 4s sub-shell?
Answers
Answer:
in the energy and in the principal quantum number (n)
Explanation:
the energy of 3s sub-shell is less than 4s sub-shell
and the principal quantum number of 3s sub-shell (n)= 3 but the principal quantum number of 4s sub-shell (n) = 4
what chemical properties does soap have that makes it a good cleaning agent?
Answers
Answer:
Soap is an excellent cleanser because of its ability to act as an emulsifying agent. An emulsifier is capable of dispersing one liquid into another immiscible liquid. This means that while oil (which attracts dirt) doesn't naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed.
Soap acts as a cleaner because of its ability to act as an emulsifying agent. A soap molecule has a polar head and a nonpolar tail. Soap consists of a carbon chain where one end attracts oil and the other attracts water.
What is the cleaning action of soap?Most of dirt can be described as oily in nature as oil does not dissolve in water. The molecule of soap consists of sodium salts of long-chain carboxylic acids. In soaps, the chain of carbon atoms dissolves in the oil, and the ionic or polar end of the soap molecule dissolves in water.
The soap molecules produce structures known as micelles. In micelles, one end faces the oil droplet, and the other end which is ionic in nature faces outside. Therefore, soap can form an emulsion in water and supports in dissolving the dirt when we wash our clothes.
Soap can be described as a kind of molecule in which both ends have different properties. The hydrophilic end dissolves water and is attracted to it whereas the hydrophobic end is dissolved in hydrocarbons and is water repulsive in nature.
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Why do elements in the same group have similar physical and chemical properties
Answers
Answer:
Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell (most chemical properties are dominated by the orbital location of the outermost electron).
Explanation:
ignore q above 6 NO LINKS and please answer all question 6-9 and parts
Answers
Where is the question?
why does reducing solute particle size increase the speed at which the solute dissolves in water .
Answers
Because it has less surface area. This can be applied to something like cooking potatoes. Cooking a larger potato will take longer than a small potato.
The reactants A and B react completely in a sealed container to form a product. What is the mass of the product of the reaction between 3.0 grams of reactant A and 5.7 grams of reactant B?
Answers
Answer:
I'm pretty sure it is 8.7
Explanation:
and btw you are fineeee
what element is 1s2 2s2 2p3
Answers
Four preparations involving table sugar (sucrose) are described below. Analyze the sugar preparation processes and the end products.
Sugar Water Sugar Floss Sugar Caramel Rock Sugar
Sugar is added to water, and the water is stirred until the sugar is no longer visible. Sugar is melted and blown with a fan to make thin threads of solid sugar. Pure sugar is melted and cooked until it changes color and becomes a thick, sticky liquid. A highly concentrated solution of sugar water is prepared, large sugar crystals are allowed to form slowly, and then dye is added.
Which of the following is evidence that a chemical reaction has taken place in one of the processes?
A.
the melting and re-solidification of sugar into threads, which are different from sugar’s natural cube-shaped crystals
B.
the slow growth of giant sugar crystals from a highly concentrated sugar-water solution and added dye
C.
the dissolution of solid sugar in water to form a thin, colorless, odorless liquid
D.
the color change that takes place after heat melts and begins to decompose the sugar
Answers
Answer:
b
Explanation:
Answer: d:the color change that takes place after heat melts and begins to decompose the sugar
Explanation:i did the study island
in a petri dish, a certain type of bacterium doubles in number every 30 minutes. there were originally 16, or 2^4, bacteria in the dish. after 150 minutes, the number of bacteria has doubled 7 times, multiplying by 2^7. Now the population of bacteria is 2^4 • 2^7. Expressed as a power, how many bacteria are in the petri dish after 150 minutes? A. 2^28 B. 2^11 C.4^11 D.2^7
Answers
Answer:
D
Explanation:
Answer:
its not D it's B trust me
Explanation:
PLEASEE HELPPP!!!!
Hydrogen bonds can be found between molecules of which substance?
1.) CH4
2.) H2
3.) C4H10
4.) NH3
Answers
Answer:
3.) NH3
Brainliest if this helps please? (: