Answer:
mass,colors,density, volume, melting point and temperature.
A pure, liquid substance is held over a heat source. Slowly, all of the liquid evaporates and transforms into a gas, which is captured by a balloon.
The gaseous substance and the liquid substance
A.
have different masses.
B.
have the same volumes.
C.
have different compositions.
D.
have the same composition.
Answer:
Its D. have the same compostion
Explanation:
Dont haveaan explation i got it wrong and the real answer popped up
Which of the following is a formula for a hydrocarbon? Question 17 options: CH4 CH2O CH3OH HCOOH
Answer:
CH4
Explanation:
Hydrocarbons are composed of hydrogen and carbon only.
CH4 is a formula for a hydrocarbon. Hence option a is correct.
What is chemical formula?Chemical formula is defined as a technique of expressing the chemical ratios of atoms that make up a certain chemical compound or molecule using chemical element numbers and symbols. The components of a compound's molecules are identified in its chemical formula, as well as the ratio in which the components' atoms mix to form those molecules.
A hydrocarbon is any of a group of organic compounds comprised only of the atoms carbon (C) and hydrogen (H). The structure of the complex is built up of carbon atoms, and hydrogen atoms attach to that framework in a variety of ways. chemical substance Study up on chemical substances.
Thus, CH4 is a formula for a hydrocarbon. Hence option a is correct.
To learn more about chemical formula, refer to the link below:
https://brainly.com/question/29031056
#SPJ2
The work-energy theorem states that the work done on an object is equal to a change in which quantity?
O kinetic energy
O displacement
O potential energy
Omass
Answer :
A.) Kinetic energy
Explanation:
When work is either added to or taken away from a system, it forces the kinetic energy to change.
The work-energy theorem states : change in kinetic energy of an object is equal to the work done on the object
[ I took the quiz already on Edgenuity and received 100% ]
Hope this helped ! :)
Answer:
Kinetic energy
Explanation:
Edge 2020
A student reported to her instructor that her unknown contained salt, salicylic acid, and sand. In reality the unknown contained only the first two components, but no sand. What might have led the student to believe sand was present in the unknown? How could the substance be tested to determine if it was actually sand?
Answer:
Explanation:
From the information given:
The unknown contained salt, salicylic acid, and sand.
It is okay for the student to believe that the sand is present in the unknown, but if we carry how a scientific experiment, we will confirm such a hypothesis if it is right or wrong.
For a test containing salt, salicylic acid, and sand.
We know that the salt is soluble in water, but salicylic acid is sparingly soluble i.e., lightly soluble, and sand is insoluble in water.
So, we will add the unknown mixture into the water. The salt will eventually dissolve first, and then the salicylic acid will dissolve lightly.
Afterward, we will heat the mixture to evaporate the salicylic acid to evaporate, leaving us with the salt.
If there is a positive result of her claim that there is some presence of sand in the evaporated salt sample, that might result from impurities.
A volcano violently erupts near a small town and wildlife preserve. Which effect might occur?
1. Some local species develop new adaptations
2. New species form at the wildlife preserve
3. Many wildlife species become extinct
4. Ash and dust fill the air and reduce sunlight
If anyone knows the answer it would help a lot, thanks
Answer: In real sense, all of these things could happen. But the one that would suit this question would most definitely be 4.
Explanation:
Answer:
D. Ash and dust fill the air and reduce sunlight.
Explanation:
took the test
According to the law of conservation of matter, how must a chemical equation be written?
Question 6 options:
The subscript of every element must be the same on each side of the equation.
An equal number of compounds must appear on each side of the equation.
The same coefficient must be applied to every molecule in the equation.
An equal number of atoms must be on both sides of the equation.
Answer:
An equal number of atoms must be on both sides of the equation.
Explanation:
Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write
out?
a set of quantum numbers for the last electron in the atom
a configuration with numbers, letters, and superscripts
a dot structure of the atom
an orbital notation of the atom
Answer:
D. an orbital notation of the atom
Explanation:
Orbital notiation uses lines and arrows to show shells, subshells, and orbitals for electrons in an atom. Since it shows arrows being paired up in this diagram it would be the best model for Chuck to use.
On Edgenuity2020, the answer is D) an orbital notation of the atom
What is the median number of seeds that germinate at 24*C
Answer:
80. Sorry if I am wrong.
Explanation:
clouds form when water vapor in the atmosphere
A-evaporates
B-condenses
C-runsoff
D-precipitates
Answer:
A- evaporates
Answer:
Condenses
Explanation:
Clouds are created when water vapor, an invisible gas, turns into liquid water droplets. These water droplets form on tiny particles, like dust, that are floating in the air.
How many grams of AlCl3 can be prepared from 3.5 moles of HCl gas?
Answer:
156 g of AlCl₃ will be produced from 3.5 moles of HCl.
Explanation:
Given data:
Number of moles of HCl = 3.5 mol
Grams of AlCl₃ produced = ?
Solution:
Balanced Chemical equation:
3HCl + Al(OH)₃ → AlCl₃ + 3H₂O
Now we will compare the moles of AlCl₃ with HCl from balanced chemical equation.
HCl : AlCl₃
3 : 1
3.5 : 1/3×3.5 = 1.17 mol
Mass of AlCl₃ produced:
Mass = number of moles ×molar mass
Mass = 1.17 mol × 133.341 g/mol
Mass = 156 g
Thus 156 g of AlCl₃ will be produced from 3.5 moles of HCl.
Write 6319857 in scientific notation
Answer:
6.319857 * 10 to the power 7
Answer:
6.319857*10 to the 7th power
Explanation:
What mass of aluminum is required if 40.0 grams of iron (III) oxide is to be completely consumed as
shown in the following reaction? (NO CALCULATOR) Fe2O3(s) + 2Al(s) → 2Fe(l) + Al2O3(s) (A) 13.5 g (B) 27.0 g (C) 40.0 g (D) 67.0 g
Answer:
13.5
Explanation:
Molar mass of Fe2O3 = 2*56 + 16*3 = 112 + 48 =160 approximate value
Number of moles of Fe2O3 = mass/molar mass = 40/160 = 0.25 mol
The reaction is balanced. Fine
1 mol of Fe2O3--------> 2 mol of Al
0.25 mol--------> 0.25*2 = 0.5 mol of Al
Mass of Al required = Number of moles * Molar mass
= 0.5 * 27 = 13.5 g
Right the formula for finding the wavelength of a wave. What is
the value of c?
Answer:
Divide the energy by Planck's constant, 6.626 x 10-34, to get the frequency of the wave. Divide the speed of light, ~300,000,000 m/s, by the frequency to get wavelength.
plz mark brainliest
what is the highest occupied energy level for gold
Answer:
Number of Energy Levels: 6
Explanation:
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 32
Fifth Energy Level 18
Sixth Energy Level 1
An igneous rock is found on the ground and has no identifiable crystals. What is the most likely origin of this rock?
Answer:
Its a Extrusive Igneous Rock
Explanation:
They form on the surface where they cool.
Answer: Rock was eroded by surrounding rocks
Explanation: my teacher said that but i think it is wrong-
7 Salt water containing 1.92 lb/gal of salt flows at a fixed rate of 2 gal/min into a 100 gal tank, initially filled with fresh water. The density of the incoming solution is 71.8 lb/ft3. The solution, kept uniform by stirring, flows out at a fixed rate of 19.2 lb/min. How many pounds of salt will there be in the tank at the end of 1 h and 40 min? What is the upper limit for the number of pounds of salt in the tank if the process continues indefinitely? How much time will elapse while the quantity of salt in the tank changes from 100 to 150 lb?
Answer:
The quantity of salt is "957 lb". A further explanation is given below.
Explanation:
(1)
As we know,
1 hour 40 Min
= 60 min + 40 min
= 100 min
Salt water is going in at the rate of 2 gal/min
Salt water went into the tank in 100 min will be:
= [tex]2 \ gal/min\times 100 \ min = 200 \ gal[/tex]
We have 1.92 lb of salt per gal.
In 200 gal, salt went in 1 hour 40 min will be:
= [tex]1.92 \ salt/gal\times 200 \ gal[/tex]
= [tex]384 \ lb[/tex]
Now,
ft3 = 7.5 gal
The density of solution will be:
= [tex]\frac{71.8 \ lb}{7.5 \ gal}[/tex]
= [tex]9.57 \ lb/gal[/tex]
The solution went out in 100 min 1920 lb as well as going out at 19.2 lb per min.
= [tex]\frac{1920 \ lb}{9.57 \ lb/gal}[/tex]
= [tex]200 \ gal[/tex] (salt went out)
The salt remained in the tank at the end of 1 hour 40 min i.e.,
= [tex]384 - 200[/tex]
= [tex]184 \ lb[/tex]
(2)
As well as the upper limit for the no. of pounds for continues stirring indefinitely per 100 gal will be:
= [tex]957 \ lb[/tex]
what is Metallic Characteristics
Answer:
metallic characteristics refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities.
Explanation:
What’s the answer????
Answer:
DNA
Explanation:
Lithium has an atomic mass of 6.941 amu. Lithium has two common isotopes. The one isotope has a mass of 6.015 amu and a relative abundance of 7.49%.
What is the abundance of the other isotope?
What is the mass of the other isotope?
Answer:
The atomic mass of second isotope is 7.016
Explanation:
Given data:
Average Atomic mass of lithium = 6.941 amu
Atomic mass of first isotope = 6.015 amu
Relative abundance of first isotope = 7.49%
Abundance of second isotope = ?
Atomic mass of other isotope = ?
Solution:
Total abundance = 100%
100 - 7.49 = 92.51%
percentage abundance of second isotope = 92.51%
Now we will calculate the mass if second isotope.
Average atomic mass of lithium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
6.941 = (6.015×7.49)+(x×92.51) /100
6.941 = 45.05235 + (x92.51) / 100
6.941×100 = 45.05235 + (x92.51)
694.1 - 45.05235 = (x92.51)
649.04765 = x 92.51
x = 485.583 /92.51
x = 7.016
The atomic mass of second isotope is 7.016
How does warm water at the surface of the ocean
become colder?
Answer:
Explanation:
Heat energy always moves from hot to cold. The sunlight doesn't reach certain parts of the ocean due to it being so deep. The water above it absorbs it. So because this top water absorbs all the heat/energy, it is a lot warmer and is constantly transferring heat to the colder parts through kinetic energy. The warmer water has particles that have way more kinetic energy than the cold particles below it. And more kinetic energy means more movement, so that's why they transfer their heat to the colder particles.
I dont actually know if Im correct or not. Im just guessing based on what I know about physics.
Write the difference between compound and mixtures ?
Answer:
The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. Pure substances are made up of elements and compounds
Hope this helps!
explain how you think we can determine if a substance is a pure substance or a mixture.
Answer:
Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.
Explanation:
Convert 22.0 mL to L
Ionic bond is found between Immersive Reader
A- Non-metals with Non-metals
B- Non-metals and Metalloids
C-Metals and Non-metals
D- Metals and Metalloids
Answer:
A
Explanation:
I hope this helps. A because two non-metals can form together.
Which of the following questions could best be answered by the work of
Charles Kuen Kao?
In 1770, ___________ published the first map of the Gulf Steam.
Group of answer choices
Ben Franklin
Nevil Maskelyne
J. F. W. DeBarres
Answer: Ben Franklin
Explanation: Hope this helps! :)
Answer:
Ben Franklin
Explanation:
Remember black lives matter and vote Joe Biden
Where on the table would a group's
ionization energy be the greatest?
Answer:
upper left
Explanation:
it is a trend on the periodic table. Ionization energy increases from left to right(->) I t also increases down to up
Answer:
right
Explanation:
If you are doing this on usatestprep its on the right side
What is the electron configuration of the element in period 2 that has 5 valence electrons (valence electrons are the electrons in the outermost shell) *
Answer:
Nitrogen
Explanation:
N= is the symbol
electronic configuration
1s2 2s2 2p3
Neon (Ne) is in group 18. This element
1. has 18 electrons
2. has 18 electron shells
3. is very stable
4. forms a salt when combined with a metal
Answer:
option 3
Explanation:
Neon is one of the noble gases. Noble gases don't react with any element because of their stability. Elements of Group 18 in Periodic Table are inert gases.
Answer:
is very stable
Explanation:
Covalent bond occur between which groups of elements?Immersive Reader
a-Non-metals and Metalloid
b-Metals and Non-metals
c-Non-metals and Non-metals
d-Metals and Metalloid
