Answer:
See explanation
Explanation:
Salt makes ice to melt faster than it usual. Sugar is another substance that influences the melting time of ice.
If i have a sample of pure ice and another sample of ice treated with sugar. I have to maintain the both initially at 0 degrees temperature and have a stop clock to measure the melting time.
I will ultimately notice that the sample of ice treated with sugar will melt faster than the pure sample of ice due to the presence of an impurity.
6. Un átomo de sodio tiene 11 protones, 12 neutrones y 11 electrones, a) ¿cuál es la masa en gramos de este átomo de sodio? b) Si este átomo de sodio pierde un electrón para quedar cargado positivamente (Na+1) ¿Cuál es su nueva masa? ¿cuánto cambió en porcentaje con respecto a la masa original (la del literal a))? c) Si todos los átomos de sodio fueran iguales ¿cuántos átomos de sodio hay en un miligramo?
Answer:
a. 3.851301x10⁻²³g
b. La masa del Na⁺ es 3.85121x10⁻²³g y 0.002% es el cambio percentual.
c. 2.6x10¹⁹ átomos hay presentes.
Explanation:
a. La masa de un electrón es 9.1x10⁻²⁸g
La de un protón es 1.673x10⁻²⁴g
La de un neutrón es 1.675x10⁻²⁴g
La masa del átomo de sodio es:
11*1.673x10⁻²⁴g + 12*1.675x10⁻²⁴g + 11*9.1x10⁻²⁸g =
3.851301x10⁻²³gb) Ahora, con 10 electrones la masa es:
11*1.673x10⁻²⁴g + 12*1.675x10⁻²⁴g + 10*9.1x10⁻²⁸g =
3.85121x10⁻²³gEl cambio percentual es:
3.851301x10⁻²³g - 3.85121x10⁻²³ / 3.851301x10⁻²³ * 100 =
0.002% es el cambio percentual.c. 1 átomo de sodio pesa 3.851301x10⁻²³g, 1mg = 1x10⁻³g tendrán:
1x10⁻³g * (1 átomo / 3.851301x10⁻²³g) =
2.6x10¹⁹ átomos hay presentesExplain the trend in boiling points as you move down group v11
Answer:
Fluorine
Chlorine
Bromine
Iodine
Boiling point increases as you go down the group v11
Explanation:
The elements of Group VII are the halogens consisting of f fluorine (F), chlorine (Cl), bromine (Br), iodine (I). All of which are non metals and exists as diatomic molecules - F2, Cl2, Br2, I2 with intermolecular attractions between the two molecules of each element held by Van der Waals dispersion force.
Moving down the group, the size of the atoms increases in size from Fluorine, F2 and Chlorine, Cl2 which are gases to Bromine , Br2 which exists as a liquid to solid, Iodine, I2. This attributes to the increasing in Strength of the Van der Waals forces as you go down the group. In order to break the vanderwaals forces , More heat energy is required to change thier states leading to the increase in boiling point going down the group.
Fluorine
Chlorine
Bromine
Iodine
Boiling point increases as you go down the group
How does energy play a role in different rock types forming? I had this question another time in my test and it's asking the same thing again.
Answer:
Yes
Explanation:
Yes, there are many energy forces that directly affect the formation of rocks and other substances. The Sun itself provides both energies in the form of heat/radiation and magnetic energy. Heat can get so intense when combined with pressure from being so far underground that it causes rocks to melt and become magma, which combines with other minerals and forms new types of rocks when they cool in the future. Magnetic energy helps push and pull the waves and wind on Earth which ultimately break down rocks into sand over the years.
How can a chemical reaction be sped up?
By mixing the chemicals.
Answer:
A chemical reaction can be sped up by many factors. Add a catalyst (A substance that reduces activation energy, speeding up the reaction) Increase the concentration of reactants. Increase the concentration of catalysts.
HELP MEEEEEE PLEASEEEEE WILL OFFER BRAINLIEST
Answer:
1.This answer would be option A.
2. I think that would be 1350
Explanation:
HELP . which kind of tides causes the highest and lowest tides ?
please helppppppppppppppppppppppppppppppppppppppppp
A student added some sugar to a glass of water, but it did not dissolve quickly. What could the student do to increase the rate at which the sugar dissolves in the water? *
Freeze the water
Heat the water
Filter the water
Add salt to the water
Answer:
Heat the water up!!
Explanation:
I'm hoping this is right? I'm pretty sure it is! Hope you get it right.
When two nitrogen atoms bond together, they form the diatomic molecule N2. Which
type of bond does N2 have?
covalent
ionic
O metallic
O semimetal
ASAP QUICK
convalent
Explanation:
I hope its helps u
where is kuiper belt located
Answer:
On the out side of the solar system near NeptuneExplanation:
I did this lesson on Edge and that is what it said
Read this passage about Christopher Reeve.
Christopher Reeve was born on September 25, 1952, in New York City. His mother was a journalist, and his father was a professor. As a kid he played sports, did well in school, and liked acting. His passion for acting goes back to playing with his brother when they were little. Reeve acted in his first play at the age of nine. After attending college, taking acting classes, and acting in many plays and movies, Reeve landed his biggest role. In 1978, he played the title role in Superman. He received very positive reviews for his performance and starred as Superman in all the sequels. Reeve was soon acting as the lead role in dozens of movies after Superman. Once well-known, Reeve used his celebrity status for good causes, such as visiting very sick children through the Make-A-Wish foundation. He was also a track and field coach at the Special Olympics.
Besides acting, Reeve was also a licensed pilot and liked horseback riding. He learned to ride horses for a movie role, and he continued riding in his free time. Unfortunately, while riding one day in 1995, Reeve fell from his horse and became paralyzed from the neck down. Being confined to a wheelchair did not hold back Reeve from being socially active, and after many surgeries and rehabilitation, he decided to dedicate his life to helping people with spinal-cord injuries. He created the Christopher Reeve Foundation, which supports the improvement of the lives of people with disabilities and helps fund research to find a cure for paralysis. He was also politically active, working with senators to make sure that people with disabilities were treated fairly in the workplace. Reeve received many awards for his dedication to public service. He also wrote two books about his experiences, and a documentary was made about his life. Reeve passed away in 2004, but his legacy lives on today. He touched the lives of many people and showed us what it means to overcome extreme odds by never giving up.
Based on this passage, Reeve best fits in the yearbook category
“Most Likely to Take Risks.”
“Most Likely to Help Others.”
“Most Likely to Run for President.”
“Most Likely to Be a Musician.”
PLEASE HURRY ONLY 10 MINUTES LEFT
Answer:
"most likely to help others"
Explanation:
thank u hope it helps u
50 pts! Please help, much appreciated (:
2. Consider the table of boiling points and structural isomers. Note that butane has two possible isomers but that decane has 75 possible isomers. Why does the number of possible isomers go up with an increasing number of carbon atoms?
Answer:
because the number of constitutional confirmation , and geometric isomers goes up with each carbon atom added there are many more possible configurations and connectivities possible with decane , a 10 carbon chain , than with butane, a 4 carbon chain
"The number of possible isomers go up with an increasing number of carbon atoms because as the number of carbon atoms increases the tendency to form branching with other carbon atom increases as well."
What is isomer?
Isomers are molecules or polyatomic ions that have the same molecular formulas that is, the identical number of atoms of each element but different atomic configurations in space. Isomerism refers to the existence or potential of isomers. Isomers don't have to have the same chemical or physical properties.
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what is the relationship between nitrogen and carbon-14?
Answer:
The relationship between carbon-14 and nitrogen is that carbon-14 forms from nitrogen atoms and eventual decays into atoms of nitrogen-14.
Explanation:
The relationship between carbon-14 and nitrogen is that carbon-14 forms from nitrogen atoms and eventual decays into atoms of nitrogen-14.
Since carbon-14 contains an unstable nucleus that decays radioactively over time, it is a radioactive isotope of carbon. The atomic nucleus of this substance, which goes by the symbol "C-14," consists of six protons and eight neutrons. On Earth, carbon-12 (C-12), an atom with six protons and six neutrons, makes up the vast bulk of the carbon.
In the high atmosphere of the planet, a nuclear process known as cosmic ray spallation produces carbon-14. High-energy cosmic rays hit with nitrogen-14 (N-14) atoms in the atmosphere, with the majority of these collisions coming from the Sun and other space-based sources.
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