Answers
Answer:
20.82
Explanation:
Related Questions
Analysis- How could you determine whether an unknown clear liquid is pure water or
salt water? Remember that you should never taste any substance of unknown identity. Use at least 4 sentences respond
Answers
Answer:
Boiling the subtance
Explanation:
To determine the nature of an unknown liquid the first thing you can do is boil it:
* If the sample is water, the boiling point must be near to 100°C
*When all pure water is evaporated, there is no residue, the glass must be empty.
* But if the sample is salt water, when all water is evaporated, you will see a solid white residue that, possibly, is salt.
How do nicotine and tobacco cause cancer?
Answers
Answer:
by damaging or changing a cell's DNA
Explanation:
Which one is a compound
Answers
Answer:
CO
Explanation:
the rest are elements. CO is made up of one carbon atom and one oxygen atom
Why do you think many metals are good at conducting electricity?
Hurry, please!!!
Answers
Hypothesize in your words how the heat is flowing through radiation.
Answers
Radiation is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero. In other words the heat of the energy it radiates in infrared spectrum.
How many protons? And how many electrons? (2pts)
How many valence electrons? (1pt)
Which noble gas does your element want to be like? (1pt)
Will the element give or gain electrons to form an ion? How many electrons? (2pts)
What charge will the element form? (1pt)
Will it be a cation or an anion? (1pt)
my element is arsenic btw and I NEED TO THIS TONIGHT BECAUSE GRADES ARE DUE
Answers
5 valence
Wants to be like krypton
Gain. 3
A minus 3 charge
Anion
imagine you have four food dyes to test A, B, C and D imagine that you are going to investigate which food dye diffuses more quickly a- which variable will you change? b- which variable will you measure? how will you do this?
Answers
Answer:
You will change which food dye is used. You will measure how quickly the dyes diffuse. You could use a timer to see how long the dye takes to completely diffuse.
The information regarding the change in the variable should be described below:
The following information should be considered:
You will change the food dye is used. You will measure how quickly the dyes diffuse. You could use a timer for watching how long the dye takes to completely diffuse.Learn more: https://brainly.com/question/4626564?referrer=searchResults
Which of the four following items are made up of one or more molecules?
Group of answer choices
Salt
Neon
Hydrogen
Gold
Answers
what are 3 examples of pairs of atoms with nonpolar covalent bonds?
Answers
Answer:
Carbon dioxide - CO.
Benzene - C6H.
Carbon tetrachloride - CCl.
Methane - CH.
Ethylene - C2H.
Explanation: Some examples of atoms with nonpolar convalent bonds. Hope this was found useful!!
Non polar covalent compounds have no net dipole moment due to charge separation. Some examples are, CO₂, H₂, N₂,O₂ etc.
What are covalent compounds?Covalent bonds are formed by the sharing electrons between atoms. Covalent bond is comparatively weaker than ionic bonds. Atoms of deficient number of electrons will combine by sharing their valence electrons and forms covalent bonds.
When one atom has more electronegativity, then the shared pair of electrons will attracted into the electronegative atom. This creates a charge separation and a dipole moment.
However, if the electronegative atoms are linear in geometry from the central less electronegative atom then the dipole moment cancel each other and the compound become non polar as in the case of CO₂.
All gases in molecular states are covalently bonded and are non polar such as H₂, N₂,O₂ etc.
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Which of the following will Float on pure water?
оа
Ob
A substance with a mass of 1.33 g. and a volume of 1.38 ml.
A substance with a mass of 534.23 grams and a volume of 522.3 mL
A substance with a volume of 436.2 mL and a mass of 4180.23 g.
A substance with a volume of 3.35 mL and a mass of 22.64 g.
ос
Od
Answers
Answer:
ob
Explanation:
becoz when volume increases density decreases.
It is 1,518 miles from West Lafayette to Provo, UT (where Mrs. Fernandez started in college). If I drive in that direction 692 miles the first day and 674 miles the second day, how many more miles will I have to drive the third day until I reach my destination? Explain. *
Answers
Answer:
152 more miles you will have to drive the third day to reach the destination.
Explanation:
First you must know the distance during the first two days. If you drive 692 miles on the first day and 674 miles on the second day, to get the distance traveled on both days you must add both amounts traveled:
692 miles + 674 miles= 1,366 miles
Knowing that there are 1,518 miles from West Lafayette to Provo, UT, to know the number of miles you will have to drive on the third day to reach your destination, you must subtract between the total distance and the distance traveled in the first two days. This is:
1,518 miles - 1,366 miles= 152 miles
152 more miles you will have to drive the third day to reach the destination.
your my babygirl my love for i will always have te7277sc0309 or if i don't then nothing at all would be as important to me as you are
Answers
Answer:
uhm-
Explanation:
chile, anyways so-
Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?
Answers
Answer:
A. The temperature is always lower.
Explanation:
Just took the test on Edg. 2020
Give me branliest please
A 5.0-L sample of sulfur hexafluoride (SF6) is stored at a temperature of 250.0 K and a pressure of 67.0 Pa. If the pressure is decreased to 60.0 Pa, what will the new temperature be?
Answers
Answer:279.1 K
Explanation:
You'll be using Gay-Lussac's Law for this. P1/T1=P2/T2
I have a class for this, and one of the practice questions was formatted this way, so I used that format and substituted said numbers as needed
P1:67 Pa
P2:60 Pa
T1:250 K
T2:?
I really hope this helps!
Molecules are
Group of answer choices
2 elements bound together
2 atoms bound together
2 or more atoms mixed together
2 or more atoms bound together
Answers
Is 200 meters greater than 2000 centimeters
Answers
Answer:
200 meters.
Explanation:
2000 centimeters is 20 meters
100 centimeters = 1 meter
2000 divided by 100 = 20
Explanation:
Yes, 200 meters is greater than 2000 centimetres . Because 2000 centimetres is only 20 meters . So, 200 meters is greater.If you like this answer then mark this answer as BRAINLIEST answer.
Thank you ☺️☺️
How do you make an atom of F become Ne?
Answers
Answer:
If atoms gain electrons, they become negative ions, or anions. ... A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -
Explanation:
Answer:
Add and electron and a proton
Explanation:
You would have to add a proton and an electron to F to get it to be Ne
16 meters per hour to miles per sec
Answers
Answer:
2.76 (full answer) 2.7617e-6
Explanation:
30 Points!! 15 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answers
Answer: 22: C
23: A
24: A
25: D
26: B
Explanation: I hope that this helped :)
Answer:
22) b. stainless steel.
23) c. they are all substances.
24) b. a compound can only be separated into its components by chemical means.
25) a. substances are compounds, mixtures are not.
26) b. capitalized
extra: not 100 percent sure of 25
What does electro negativity value depend on ?
Answers
Answer:
An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the more an atom or a substituent group attracts electrons.
Explanation:
Hope this helps :)
The change of state in which a solid becomes a liquid is called ______. a liquefaction b melting c condensation d sublimation
Answers
what is the process called when the moon begins to fade from a full moon to a new moon
Answers
Answer:
It's called moon phase
Explanation:
hope this helps
The process of water migrating from areas of low electrolyte concentration to area of high electrolyte concentration is called ———————. ——————— is the medicine term for the swelling of the brain
Answers
Answer:1-Diffusion
2-Cerebral edema
Explanation:
The process of water migrating from areas of low electrolyte concentration to areas of high electrolyte concentration is called diffusion.
Cerebral edema is the medical term for the swelling of the brain.
What is diffusion?Diffusion is a process where the substance or ions of from a low concentration to a high concentration. It occurs against the concentration gradient, so it needs energy.
Cerebral edema is a condition where fluid gets filled in the brain and the brain swells and make pressure on the skull called intracranial pressure.
Thus, Diffusion is the mechanism by which water moves from regions with low electrolyte concentrations to regions with high electrolyte concentrations.
The medical term for brain swelling is cerebral edema.
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How is carbon dioxide different than the other types of matter
Answers
Briefly explain why sulfur and phosphorus can form complicated molecules, but nonmetals in period 2 tend to form only diatomic molecules
Answers
Answer:
see below
Explanation:
Sulfur and phosphorous can violate the octet rule and have an expanded octet, so molecules of these elements can contain more than eight valence electrons. In contrast, nonmetal elements in period 2 can't have an expanded octet because they don't have d orbitals. These elements must obey the octet rule and can hold only up to eight valence electrons. Period 2 elements can fill their outer orbitals by covalently bonding with one other atom of the same element.
I have a few question please help its due in a few hours 1. Determine the specific heat of a certain metal if a 450 gram sample of it loses 34,500J of heat as its temperature drops by 97K
2. The temperature of a 25 gram sample of a certain metal drops by 103 K as it loses 2600 joules of heat. What is the specific heat of the metal?
3.What is the final temperature after 840 Joules is absorbed by 10.0g of water at 298K?
(please show steps)
Answers
Answer:
c = 0.79 j/g.K
c = 1 j/g.K
T2 = 123.1 K
Explanation:
1)
Given data:
Mass of metal = 450 g
Heat loses = 34,500 j
Temperature drop = ΔT = 97 K
Specific heat of metal = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
34500 j = 450 g ×c × 97 K
34500 j = 43650 g.K ×c
c = 34500 j/43650 g.K
c = 0.79 j/g.K
2)
Given data:
Mass of metal = 25 g
Heat loses = 2600 j
Temperature drop = ΔT = 103 K
Specific heat of metal = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
2600 j = 25 g ×c × 103 K
2600 j = 2575 g.K ×c
c = 2600 j/2575 g.K
c = 1 j/g.K
3)
Given data:
Mass of water = 10 g
Heat absorbed = 840 j
Initial temperature drop = 298 K
Final temperature = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2 - T1
840 j = 10 g ×4.18 j/g.K × [T2 - 103 K]
840 j = 41.8 J/K × [T2 - 103 K]
840 J/41.8 J/ K = T2 - 103 K
20.1 k = T2 - 103 K
T2 = 20.1 K + 103 K
T2 = 123.1 K
determine the energy in joules of a photon whose frequency is 3.55 x10^17 hz( with units)
Answers
i think it is this
Explanation:
On the periodic table, why are all noble gases placed in column 18 (8A)?
A.Noble gas elements have identical molar masses.
B.Noble gases are all rarer than elements in other columns.
C.The noble gases only chemically react with other noble gases.
D.The valence electron configuration is similar in all noble gas elements.
Answers
Answer:
D
Explanation:
In the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.
What is periodic table?A periodic table is defined as an organization of all known elements in increasing atomic number and repeating chemical properties.
It can also be defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.
There are more than 118 elements are arranged in modern periodic table.
Noble gases are defined as any of a class of rare gases that includes helium, neon, argon, krypton, xenon, and, most commonly, radon and display high stability and extremely low reaction rates.
Electronic configuration are defined as the electron configuration around the nucleus of a specific atom or molecule.
Thus, in the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.
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When we discuss communication, we often first think of written and oral communication. Write one paragraph about a time when you found it easier to communicate with a graph than with text.
Answers
Answer:
There's a lot of answers.
Explanation:
Last year, I presented a paper on population growth in the United States between the years 1975 and 2015. The data involved numbers and figures. This data was difficult to present in textual format, so I turned to graphing. The graph helped me break down and simplify complex numerical data so my audience could more easily understand it.
A time when I found it easier to communicate with a graph than with text was when I wanted to make a presentation about the importance of education.
Communication simply means sending a message from one person to another person. Graphs can be used when one wants to make a visual representation of data.
I used graphs when I wanted to make a presentation about the importance of education. I wanted to show the audience how certain regions like the European countries are well developed than African countries. The graph was vital in visualizing this.
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Potential energy is based on an objects
A)gravity
B)mass
C)position
D)kinetic
Answers
Answer:
c
Explanation:
because potential energy is created with the position of a body when you pick up something the thing will have stored energy which is transferred from you so the stored energy is potential energy created by the position of a body that when you see over your head you scared of that thing not to bit you because it has stored energy if you see the thing already failed on the ground you wouldn't scared of that because the enery is already gone
Hope help you