Answer:
lower th
Explanation:
Pb{Cl}_{2})$ is an inorganic
answer:
lower the temperature so the lead chloride settles out of solution
compound which is a white solid under ambient conditions. It is one of the most important lead-based
reagents. It is poorly soluble in water. And it is insoluble in cold water. Sodium chloride is ssolble at all temperature
so lower the temperature
what is temperature?
Answer:
a measure of hotness or coldness expressed in terms of a scale like Fahrenheit or Celcius
if we change the pH of a substance is this a physical change chemical change or both?
Answer:
chemical change
ExplanationC:
Using the information in the table, calculate the number of moles in a 7.89 kg sample of aspirin
(C9H8O4).
Write your answer using three significant figures.
Answer:
43.7mol
Explanation:
[tex]?mol = 7.86kg * \frac{1000g}{1kg} *\frac{1mol}{180g}[/tex]
Above is dimensional analysis method. Write what you are trying to find with the question mark and write your given info on the other side of the equal sign. Follow the units and pay attention to them cancelling out. You should have your answer unit by the end.
the 180g came from the table with masses times the chemical formula all added together. Below is exact formula.
hydrogen mass(hydrogen amount) + carbon mass(carbon amount) + oxygen mass(oxygen amount)
1g(8)+12g(9)+16g(4)=180g
180g is 1 mole of [tex]C_{9} H_{8} O_{4}[/tex]
Why was einstein not happy with the probable positions of electrons in the orbitals?
Since electron orbitals are described as probability clouds, Einstein disagreement with the probable positions of electrons in the orbitals is that, It is not possible to know the orbit of an electron when the position is under probability.
According to Bohr's theory, it is difficult to locate electron or cannot be located in a definite region. Electron has to be found in an orbit and nowhere else. When the probability of finding an electron in a given spherical shell around the nucleus is plotted the distance of the electron from the nucleus for the hydrogen atom, the graph indicates that the probability of finding the electron increases as the distance between the electron and the nucleus decreases
Bohr claimed that electrons a entities had only probabilities if they weren't observed. While Einstein argued that they had independent reality.
But in wave mechanics Model, there is a slight chance of knowing the location of the electron.
Heisenberg uncertainty principle also claim the possibility of knowing the position of electron. Albert Einstein also claim that; to determine the position of an electron to an accurate extent, you would have to compromise your ability to know it's momentum. This inaccuracy will eventually affect the measurement of momentum which will be extremely uncertain.
Since electron orbitals are described as probability clouds, Einstein disagreement with the probable positions of electrons in the orbitals is that, It is not possible to know the orbit of an electron when the position is under probability.
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When iodine is added to foods with no starches it turns
Answer:
Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow
In the two-substance mixtures you have investigated so far, are there any situations where there is more than one correct answer? Explain.
this is on gizmo i don't understand it
Answer:
yourmom.com
Explanation:
Ask your mom!!!!!!!
Analysis of a 1.7500-g sample of
Pepto-Bismol yields 346 mg of bismuth. What percent by
mass is bismuth subsalicylate in the sample? (Assume that
there are no other bismuth-containing compounds in
Pepto-Bismol.)
Answer:
19.8 %
Explanation:
Analysis of a 1.7500-g sample of
Pepto-Bismol yields 346 mg of bismuth. What percent by
mass is bismuth subsalicylate in the sample? (Assume that
there are no other bismuth-containing compounds in
Pepto-Bismol.)
346 mg = 0.346 gm
0.346 gm/1.75 gm =0.198 = 19.8 %
An atom of sodium has 11 electrons. Make a sketch of a sodium atom, showing how many electrons it has at each energy level. Infer how reactive sodium atoms are.
SOMEONE HELP ME PLEASE :(. I DONT GET IT :(
7. What is the name of the compound AICO3?
Answer:
Calcium carbonate
Explanation:
Hope this helps :)
Have an amazing day <3
Which statement describes the hydrogen and oxygen atoms in water?
The lone pair of electrons in each hydrogen atom causes the molecule to be bent; the oxygen atom has a partial positive charge, while the hydrogen atoms have partial negative charges.
The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial positive charge, while the hydrogen atoms have partial negative charges.
The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.
The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.
Answer:
1. Q: How does a phase change from solid to liquid occur in a substance?
A. Heat energy is added to the substance, weakening the electrical attraction between molecules.
2. Q: How do weak intermolecular bond strengths affect the melting and boiling point of a substance?
A: Both the melting point and boiling point are lower.
3. Q: Which term or phrase represents a separation of charges in a molecule, resulting in partial positive and partial negative charges?
A: Dipole
4. Q: Which statement explains why water and ethanol have different boiling points?
A: Water and ethanol have different molecular structures
5. Q: Which statement describes the hydrogen and oxygen atoms in water?
A: The lone pairs of electrons in the oxygen atom causes the molecule to be bent; the oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.
Explanation:
Did it
The statement which best describes the hydrogen and oxygen atoms in
water is that the lone pairs of electrons in the oxygen atom causes the
molecule to be bent; the oxygen atom has a partial negative charge, while
the hydrogen atoms have partial positive charges.
Water is a compound which comprises of the elements hydrogen and
oxygen. They share electrons in the covalent bond present between the
atoms. The sharing of electrons isn't equal which is why it has a bent
structure.
The oxygen atom has a partial negative charge, while the hydrogen atoms
have partial positive charges present in the compound.
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what is air pressure? In your own words
Answer:
The amount of force applied on an object that is moving in motion
Explanation:
Compared to the energy of an electron in the second shell of an atom of sulfur, the energy of an electron in the
1
first shell is lower
2
first shell is the same.
3
third shell is lower
4
third shell is the same.
Answer:
First shell is lower
Explanation:
The electron has to absorb energy to excite and go to higher energy levels/ shells and should release energy to go to lower energy levels/ shells. This means higher the shell , more energy is required and vice versa
What do the carbon, oxygen, and nitrogen cycles all have in common? a. They all include an exchange of gases with the atmosphere. b. None of the cycles are biogeochemical cycles. c. They are all byproducts of photosynthesis. d. They all sustain life, but living organisms have no part in the cycle. Please select the best answer from the choices provided A B C D
Help please, take a screenshot who will answer will be brainiest.
Answer:
1. Metals are typically shiny, and good at conducting electricity and heat and have a high melting point. Non-metals are typically dull, and poor at conducting electricity and heat and have a low melting point.
2. Element C and element E.
3. a. It is a poor conductor of electricity
b. It is a good conductor of heat
Explanation:
As it says in the chart at the top of the picture, metals are typically good at conducting electricity and heat and have a high melting point. Non-metals are typically poor at conducting electricity and heat and have a low melting point.
What is the missing letter in H,J,K,L,M,N,O,P.? And what is the opposite of HATE.? And what is the opposite of ME.?
Think about it -,-
Answer:
The letter I
Explanation:
H, I, J, K, L, M, N, O, P
Answer:
Ahhhhhhhhhhhhhhh. Me too. I really needed to hear that today.
Explanation:
thanks for that.
what type of rock forms when heat or pressure change an existing rock?
Answer:
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
Explanation:
Please help! Giving 20 points!
Question: How can NASA scientists use Newton's third law of motion to plan for a space vehicle landing on a meteor? Make a claim. Support your claim with evidence from the article. Then, explain why the evidence supports your claim.
Article: https://newsela.com/read/lib-newton-third-law/id/54749/
Answer:
Explanation:
NASA uses rockets to launch astronauts and supplies to the International Space Station. Launching a rocket relies on Newton's Third Law of Motion. A rocket engine produces thrust through action and reaction. The engine produces hot exhaust gases which flow out of the back of the engine
mark me brainliest :D
Calculate the simplest formula of the compounds formed in the
following reactions:
Please just check if I’m correct or wrong
a) 2.3 g of sodium reacting with 8.0 g of bromine
Na=23
Br=80
My answer:
NaBr
I'm sorry I'm not sure of my answer so I am not gonna give you the answe
Write the net ionic equation for the reaction that occurs, if any, when gold is placed in a solution of hydrobromic acid
Answer:
ionic salt MX2
Explanation:
Atoms from an element in group IIA are allowed to react with atoms from an element in group VIIA. What type of compound is likely to form
elements from IIA are alkali earth metals (M) and need to lose
2 e^1- to become stable as M^2+
elements from VIIA ar halogens (X) and need to gain 1 e^1-
to become stable so one M^2+ combines with 2 X^1- to make
an ionic salt MX2
some macromolecules are polymers. what is a polymer
Answer:
1 marcomolecules are:- A macromolecule is a very large molecule, such as a protein. They are composed of thousands of covalently bonded atoms. Many macromolecules are polymers of smaller molecules called monomers.
2 polymers are:- a natural or artificial chemical compound consisting of large molecules
Explanation:
hope it helps you
Which describes an element?
A.They cannot be broken down any further.
B.They can combine with other elements to form atoms.
C.They were all discovered at the same time.
D.They were created in the Earth’s core.
Answer:
I think it's D one. Because all others are wrong
Answer: They can combine with other elements to form atoms.
Explanation:
what is the scientific name for the layers of gas that surrounds the earth ?
a . biosphere
b . atmosphere
c . lithosphere
d . hydrosphere
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Answer:
Hey mate.....
Explanation:
This is ur answer.....
b. AtmosphereAn atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.
Hope it helps!
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Of the four gases co2, h2o, n2, and o2, which are greenhouse gases?.
Answer:
h20, 02, and c02
Explanation:
(ill give brainliest)
Use this picture to explain that an electrically charged object can attract an uncharged object without any contact. Your answer should be at least three sentences long.
Answer:
It is because the object that is charged attracts the uncharged because it is giving electrons and passing it on to the object. As shown in the image the balloon is attracting the paper that is not charged. Actually telling,the charged object will cause the uncharged object to become charged, with a positive charge on one side and a negative charge on the other side. This process is called induction.
Explanation: Pls Mark Brainliest
Answer:
Positive and negative charges
Explanation:
When we put a charged object near an uncharged object, it produces opposite charges in the near end of the uncharged object by electric induction. In the figure, we can see that the ballon has charges which produces opposite charges in the paper which is uncharged.
. Nếu dẫn 0,01 mol CO2 vào 50 ml dung dịch Ba(OH)2 0,1M thì sau phản ứng thuđược
A. BaCO3
B. Ba(HCO3)2
C. BaCO3 vàBa(HCO3)2
D. BaCO3 vàBa(OH)2
What electrolyte may fall in level as a result of citrate toxicity from massive transfusion quizlket
How many molecules are in 25.3g of C2H4O
Answer:
0.57 molecules
Explanation:
how long do fresh cranberries last in the refrigerator?
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 ;(
Please help This is for my chemistry class and I need to get it done but I’m lost and need answers
Answer:
chlorine is a non metal.
sodium is a alkali metal.
helium is a noble gas.
nickel is a transition metal
I need helpppp pleaseeee!!
Answer:
Box#:
1:CoS
2:Co2S3
3:CoSO4
4:Co2(SO4)3
5:CoSO3
6:Co2(SO3)3
Explanation:
1:Co(II) is -2 and S is -2, so the charges cancel
2:Co(III) is -3 and is -2, so you cross the charges but do not reduce
3:Co(II) is -2 and SO4 is -2, so the charges cancel
4:Co(III) is -3 and SO4 is -2 so the charges cross but do not reduce
5:Co(II) is -2 and SO3 is -2 so the charges cancel
6:Co(III) is -3 and SO3 is -2 so the charges once again cross
Answer:
Cobalt (II) sulfide → CoS
Cobalt (III) sulfide → Co₂S₃
Cobalt (II) sulfate → CoSO₄
Cobalt (III) sulfate → Co₂(SO₄)₃
Cobalt (II) sulfite → CoSO₃
Cobalt (III) sulfite → Co₂(SO₃)₃