Answer:
52.2g of KCl would be left
The mass of KCl will remain despite the solution is been heated
Explanation:
When you are heating a solution, just the solvent (In this case, water), will be evaporated and, in theory, the mass of KCl will remain despite the solution is been heated.
Now, the mass of KCl that you can obtain from 350mL of a 2.0M solution will be:
Moles KCl:
350mL = 0.350L * (2.0mol / L) = 0.700 moles
Mass KCl -Molar mass: 74.55g/mol-:
0.700mol * (74.55g/mol) = 52.2g of KCl would be left
In sweet pea plants, the allele for purple flowers is dominant over the allele for white flowers. If half of the plants in one generation of sweet pea plants has purple flowers, what were the most likely genotypes of the parents?
Explanation:
The genotype for parent is going to be purple flower.
After the crossing is done, we have our p1 to be a purple flower dominant over the the yellow that is to say the parent genotype is going to be a Purple denote a capital P
Regarding water molecules, adhesion is best described as * the attraction water molecules have to other water molecules the attraction water molecules have to ionic substances the attraction water molecules have to polar substances the attraction water molecules have to other surfaces
Answer:
the attraction water molecules have to other surfaces
Explanation:
Adhesion is defined as the attractive forces between unlike substances, e.g water moving up a capillary tube.
Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).
So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.
are single replacement reactions reversible.
Explain how to count the number of elements in a compound
Answer:
The molecular formula lists the symbol of each element within the compound followed by a number (usually in subscript). The letter and number indicate how many of each type of element are in the compound. If there is only one atom of a particular element, then no number is written after the element.
Please choose the correct sequence that describes the excitement of an atom.
Such an electron transition raises the atom from the ground state to the excited state.
When energy is added to an atom from an outside source, its electrons move to a higher energy level (orbit)
As a result, the atom emits a photon.
When the atom is in an excited state, the electron can drop from the higher energy level to a lower energy level.
A) 2, 1, 4, 3
B) 4, 3, 2, 1
C) 3, 4, 1, 2
D) 1, 2, 3, 4
What is 24.3 – 15.45 when accounting for sig fig rules?
Answer:
8.85 because im smart
WILL OFFER BRAINLIEST
At what temperature does potassium iodide
have a solubility of 150 g per 100³ cm water?
75 mL of water is measured in a graduated cylinder. The mass of the water should be
A.
more than 75 grams
B.
less than 75 grams
C.
there is no good way to tell
D.
75 grams
Answer:
D-75 grams
Explanation:
that is the answer
Gatorade is an example of a homogenius or heterogenius mixture?
Answer: Homogeneous mixtures are mixtures that are completely mixed where you cannot see any separate parts. This would include stuff like Gatorade, water, coffee, and paint. Heterogeneous mixtures are mixtures that are uneven and you can see individual parts.Gatorade usually comes in one type of color, one type of flavor. Gatorade. Because it's made up of different components, it's actually a homogenous mixture or homogeneous mixture.Gatorade Thirst Quencher contains water, sucrose (table sugar), dextrose, citric acid, natural flavor, sodium chloride (table salt), sodium citrate, monopotassium phosphate, and flavoring/coloring ingredients. Some Gatorade flavor variations used to contain brominated vegetable oil as a stabilizer. Hope this helps have a nice day❤️
Explanation:
Which objects should not be thrown in landfills because they could leach into groundwater and pollute the water?
A. paints
B. aluminum foil
C. plastics
D. paper
Hi! I'm going to give brainliest to the person who answers this first/best. It has the answer choices. Thanks!
Answer:
the answer is electron....
The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of...
Answer: increasing frequency or energy and decreasing wavelength.
Explanation:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light i.e
The electromagnetic spectra consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency or increasing energy and decreasing wavelengths.
A plastic bin is found to hold 3.1x10^24 molecules of water.
Calculate the number of moles in the container.
Answer:
[tex]\boxed {\boxed {\sf 5.1 \ mol \ H_2O}}[/tex]
Explanation:
To convert from representative particles to moles, Avogadro's Number: 6.02*10²³, which tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance.
We can use it in a ratio.
[tex]\frac {6.02*10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Multiply by the given number of molecules.
[tex]3.1*10^{24} \ molecules \ H_2O*\frac {6.02*10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]
Flip the ratio so the molecules of water cancel out.
[tex]3.1*10^{24} \ molecules \ H_2O*\frac {1 \ mol \ H_2O}{6.02*10^{23} \ molecules \ H_2O}[/tex]
[tex]3.1*10^{24} *\frac {1 \ mol \ H_2O}{6.02*10^{23} }[/tex]
[tex]\frac {3.1*10^{24} \ mol \ H_2O}{6.02*10^{23} }[/tex]
Divide.
[tex]5.14950166113 \ mol \ H_2O[/tex]
The original number of molecules has 2 significant figures: 3 and 1, so our answer must have the same. For the number we calculated, that is the tenth place. The 4 in the hundredth place tells us to leave the 1.
[tex]5.1 \ mol \ H_2O[/tex]
There are about 5.1 moles of water in 3.1*10²⁴ molecules of water.
_____ is an example of a heterogeneous mixture.
A)
Tea
B)
Salad
0
Salt
D)
Mayonnaise
B) Salad
heterogeneous mixtures have a non-uniform composition with components in at least two different phases
The movement of water both on and
above Earths surface
The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!
I NEED THIS URGENT PLZ
Which property of aluminium makes it useful in the manufacture of aircraft?
A conducts electricity
B high boiling point
с low density
D silver colour
Answer:
C
Explanation:
I would say C Low Density
SORRY IF I AM WRONG
HOPE IT HELPS :D
How many grams are in
.093 liters of o2, gas at STP?
Answer:
0.13 grams of O2
Explanation:
Just did worksheet
A first order reaction has a rate
constant of .001 sec-1. What is the
half life in seconds) of this reaction if
the initial concentration is 2.0 M?
-hurry it’s a test
Answer:
one-half
Explanation:
cuz for a first order reaction is a half life independent of concentration and constant over time
How many atoms are in a 12.0g sample of lithium
Answer:
10.42
Explanation:
1.2×10²⁴atoms are in a 12.0g sample of lithium. It is also the smallest piece of substance with chemical element-like characteristics.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.
Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charges around a positive-charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.
Number of atom= number of moles ×6.022×10²³
number of moles = 12.0g /6=2 moles
Number of atom= 2 ×6.022×10²³=1.2×10²⁴atoms
Therefore, 1.2×10²⁴atoms are in a 12.0g sample of lithium.
To know more about atom, here:
https://brainly.com/question/29712001
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plant cells are the only type of cell with a cell wall
true
false
?
Answer:
true
Explanation:
All cells have a cell wall. Plant cells are surrounded by a cell membrane and outside this is a fairly rigid cell wall. The cell wall gives the plant cell a more definite shape than an animal cell. Animal cells do not have a cell wall.
Answer:
True
Explanation:
Animal cells don't have any cell walls while plants do
A substance X has a melting point of 649 C a boiling point of 1107 C and id insoluble in water. State an additional test that could b done to find out whether substance X is an ionic compound
Answer:
Electrical Conductivity of the substance
Explanation:
Ionic substances do not conduct electricity in their solid state however they are good conductor of electricity when dissolved in water or in their molten state.
A test can be carried out to see if the substance matches the property above.
If you have 4 moles of barium hydroxide, how many moles of oxygen atoms do you
have?
Answer:
8 moles of oxygen.
Explanation:
The chemical formula for barium hydroxide is Ba(OH)₂
This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.
4 moles of Ba(OH)₂ will have 8 moles of oxygen.
The number of moles of oxygen atoms we have in the compound is 8 moles .
The chemical equation for barium hydroxide is as follows:
Ba(OH)₂
According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.
Therefore, 4 moles of the compound can be represented as follows;
4 Ba(OH)₂
This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.
Therefore, we have 8 moles of oxygen atoms or 4 moles of oxygen molecules.
learn more: https://brainly.com/question/12228235?referrer=searchResults
POV: You’ve been through many question and evening answering some of them.
Here’s your break time pass, Enjoy.
:D
What are low tides caused by
27. What element has this electron configuration: 1s2 2s22p6 352 3p6 452
3d10 4p4
Choices:
Sulfur
Selenium
Arsenic
Tellurium
Answer:
Selenium
Explanation:
One way to figure this out is to count the electrons and add them up.
2+2+6+2+6+2+10+4 = 34 electrons
A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.
Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)
under what conditions will the particles of a substance have the most energy
Answer:
All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.
(b) Metal oxides which do not dissolve in water are
called ...
Ba(OH)₂ + 2 HBr --> BaBr₂ + 2 H₂O is this a double replacement reaction
Answer:
The answer is Yes
Explanation:
Barium Hydroxide + Hydrogen Bromide = Barium Bromide + Water =
Double Displacement
What do you infere about using nonrenweable vs renewable resources and the effect this has on the cost of energy
Answer:
See explanation
Explanation:
Renewable energy resources refers to energy resources that can not be depleted such as wind, solar, biomass etc.
Non-renewable energy resources refers to those energy resources that can be depleted such as fossil fuels.
Globally, it has been established that energy from renewable sources costs less than energy from nonrenewable(especially fossil fuel) sources.
According to Forbes, 2019, "The worldwide weighted average cost of electricity from solar power concentration fell by 26%, that of bioenergy reduced by 14%, solar photovoltaics, geothermal, onshore, as well as offshore wind, fell by 14%, and hydropower by 12%.".
This shows us that renewable energy remains the cheapest alternative in terms of energy cost.
I put 5 pigs, 2 goats, and 7 horses in a boat with six cats. How many dogs are in that one Disney movie with all the dogs?
Answer:
the average weight of a frog is 0.8 ounces, so your answer would be 4
Answer:
one hundred and one
Explanation: