Answers
Answer:
1st one is the answer water cannot be purified by nature pls add me in brainliest
Related Questions
As an atom gains extra electrons, it also changes size. How does the size change, and what causes the change?
The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more negatively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets smaller because there are more positively charged particles inside the nucleus to pull subatomic particles in closely.
The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more negatively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.
The atom gets larger because there are more positively charged subatomic particles spread out around the nucleus.
first to answer gets 50 points
Answers
Answer:
Expl
Electron: A negatively charged particle found circling or orbiting an atomic nucleus. An electron, like a proton is a charged particle, although opposite in sign, but unlike a proton, an electron has negligible atomic mass. Electrons contribute no atomic mass units to the total atomic weight of an atom.\anation:
true or false: Halogens are very stable because they have a full outer shell of 8
Answers
Answer:
True
Explanation:
Halogens are very stable because they have a full outer shell of 8
true or false?
Brainiest plz and hope this answer helped let me know if you need any more help I am glad to help!
It's true!
2.) Which of the following has the fastest moving particles?
a.) A desk at 25°C
b.) A glass of water at 25°C
A balloon filled with helium at 25°C
Answers
Explanation:
A balloon filled with helium at 25°C
because un gas particles as far as possible
and helium is gas so answer is c
Which set of substances contains only compounds?
Answers
Answer:
non metals are elements and elements are pure substances
Explanation:
For the following element, predict the most likely oxidation number (charge) for its corresponding ion.
Aluminum
A. Al+3
B. Al+1
C. Al-3
D. Al-1
Answers
The most likely ion of Aluminum is Al³⁺ (group 3A) since losing three electrons is the most energetically favorable way for it to follow the octet rule.
Because the charge on ions is equivalent to their oxidation state, then +3 is the most likely oxidation number of Aluminum.
What do all cations have in common? Check all that apply.
A. positive
B. negative
C. metals
D. non-metals
Answers
Answer:
B
Explanation:
All cations have more protons than electrons so they always have a positive charge.
1.The chemical or substance used to start a reaction are called
Answers
Answer:
The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.
Explanation:
Answer:
The chemical or substances used to start a reaction are called reactants.
What are the valence electrons of an atom?
A.The electrons that remain closest to the nucleus
B.The electrons that an atom gains when it becomes an anion
C.The electrons that an atom loses when it becomes a cation
D.The electrons in the highest occupied energy level
Answers
Answer:
D
Explanation:
Valence electrons are the electrons in the highest occupied principal energy level of an atom.
When you are drying your hands underneath a hand dryer, this is an example ofA. RadiationB. ConductionC. ConvectionD. Convection
Answers
Answer: Convection
Explanation: Convection is the transfer of heat so the heat would be transferred to your hands leaving them dry.
a substance composed of two or more metals.
Answers
Answer:
A substance composed of two or more metals is called an alloy
Explanation:
What is it like on Mars? Please type 6 good answers.
Answers
How many kilojoules are equivalent to 10 Joules?
A) 0.001 kJ
B) 0.01 kJ
C) 1000 kJ
D) 10,000 kJ
Answers
Answer:
It should be B: 0.01 kJ
Answer:
Hey...The answer is B) 0.01 kJ
Which of the following is NOT a way that water moves from the land to the atmosphere?
Answers
This painting is showing the actions of American colonists at the 1773 protest known by what name? A) The Plymouth Rocks B) The Boston Massacre C) The Boston Tea Party D) The New York Draft Riots
Answers
that will be the Boston tea party
Explanation: C) the Boston tea party
I did the quiz
best answer will be tagged brainliest.... no spamming pliz
Answers
[tex]\huge \mathcal \fcolorbox{cyan}{black}{ \blue{AnSweR}}[/tex]
A. Chloride ions (CI)
[tex] \large{ \green{ \bold{ \underline{ \underline{ \overline{ \overline{ \pink{hope \: this \: helps \: you \: \: ✌}}}}}}}}
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H2SO4 + ………. → ZnSO4 + H2
Answers
Answer:
Zn
Explanation:
H2SO4 + Zn → ZnSO4 + H2
Zn is the answer.
Answer:
H2SO4+Zn =ZnSO4 +H2
this is the answer
Cual es la convención de 746 Hm
Answers
Answer:
75.6
Explanation:
756x0.1=75.6
1 d =hm=0.1
Please DO NOT ANSWER if you don't know and don't copy and paste from the internet
which is stronger, ionic bonding or covalent bonding? and why
Answers
I think so the answer would be Ionic Bonding
Im not sure
Answer:
ionic bonding because of the coulombic attraction between ions of opposite charges.
I need helpppppppppp
Answers
Answer:
31: 1366.82
32: 6.45062
33: 12.50400
34: 210.42700
35: 63.88200 cm
36: -970.8772
Explanation:
4.550 x 300.4 = 1366.82
2.45002 + 4.0006 = 6.45062
26.004 - 13.5 = 12.50400
2.667 + (5.6 x 37.1) = 210.42700
2.34 x 4.55 x 6.0 = 63.88200
4.60 x 5.16 x 1.05 + 6.2 - 1002 = -970.8772
What is the health danger of breathing carbon monoxide
Answers
Answer:
Well, it´s dangerous because it displaces oxygen in the blood and deprives the heart, the brain and other vital organs.
Explanation:
What i mean by that is that breathing carbon monoxide reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. It can also causes E.g. dizziness, confusion, unconsciousness and even death.
I hope this answered yor question, if i did misundertood the question do tell me and i will try my best to explain it. Have a nice day!! :)
A 0.8612-g sample of a mixture of NaBr, NaI, and NaNO3 was analyzed by adding AgNO3 and precipitating a 1.0186-g mixture of AgBrand AgI. The precipitate was then heated in a stream of Cl2, convertingit to 0.7125 g of AgCl. Calculate the %w/w NaNO3 in the sample.
Answers
Percentage by weight of the NaNO₃, is given by the ratio of the mass of NaNO₃ to the mass of the sample
The percentage by weight of NaNO₃ in the sample is approximately 30.713 %
Reason:
Given parameters are;
Mass of sample of NaBr, NaI, and NaNO₃ mixture = 0.8612 g
Mass of AgNO₃ and AgI formed = 1.0186
Mass of AgCl formed = 0.7125
Required:
Percentage by weight of NaNO₃ in the sample
Solution:
Let A represent NaBr, let B represent NaI, and let C represent NaNO₃, we have;
Equation 1 A + B + C = 0.8612
The addition of AgNO₃, precipitates 1.0186 g mixture of AgBr and AgI, therefore, we have;
[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgBr}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgI}{Molar \ mass \ of \ NaI} \right) = 1.0186[/tex]
Molar mass of AgBr = 187.77 g/mol
Molar mass of NaBr = 102.894 g/mol
Molar mass of AgI = 234.77 g/mol
Molar mass of NaI = 149.89 g/mol
Which gives;
Equation 2 [tex]A \cdot\left(\dfrac{187.77}{102.894} \right) + B \cdot \left(\dfrac{234.77}{149.89} \right) = 1.0186[/tex]
The forming of the precipitate by passing the compounds through a stream of chlorine gives;
[tex]A \cdot\left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaBr} \right) + B \cdot \left(\dfrac{Molar \ mass \ of \ AgCl}{Molar \ mass \ of \ NaI} \right) = 0.7125[/tex]
Molar mass of AgCl = 143.32 g/mol
Therefore, we get;
Equation 3 [tex]A \cdot\left(\dfrac{143.32}{102.894} \right) + B \cdot \left(\dfrac{143.32}{149.89} \right) = 0.7125[/tex]
Solving equation (2), and (3) gives;
A ≈ 0.3252 g, B ≈ 0.2715 g
Plugging in the values of A, and B in equation (1), gives;
0.3252 + 0.2715 + C = 0.8612
C = 0.8612 - (0.3252 + 0.2715) ≈ 0.2645
The mass of NaNO₃ in the mixture, C ≈ 0.2645
[tex]The \ percent \ by \ weight \ of \ NaNO_3 = \dfrac{0.2645}{0.8612} \times 100 \approx \underline{30.713 \%}[/tex]
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Someone pls help me I will make you brain
Answers
Answer:
i guess the answer is..true
the ozone in troposphere protects the earth from ultra violet waves that may cause global warming
Which diagram or diagrams represent a compound?
Answers
Answer:
A - X Only
Explanation:
In what ways are the electronic structures of the group 14 (4A) elements similar? In what ways are they different?
Answers
Elements in the same group have the same number of outermost electrons.
What is electronic structure?Electronic structure refers to the arrangement of electrons in the atom. We know that elements in the same group have the same number of outermost electrons.
However, as we come down the group, the inner shells of the elements in group 14 become bigger and the outermost shells are now found at higher energy levels such as n=4 or 5.
Learn more about electronic arrangement:https://brainly.com/question/17101991
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what is a acid and how does it react with metals (chemical reaction)?
Answers
Explanation:
Acids are substances whose ph is lower than 7.Acids react with most metals to form a salt and hydrogen gas.
What type of bond forms between two atoms
with similar EN values (between nonmetals)?
covalent or ionic
Answers
Answer:
I'm sure it's covalent bond hope this helps
How many elements are in the compound calcium carbonate?
Answers
Answer: Calcium carbonate contains 3 elements, calcium, carbon, and oxygen. The formula is CaCO3.
Explanation:
Answer:
There are 3 elements.
Explanation:
The formula for calcium carbonate is CaCO3. The elements in it are Calcium, Carbon, and Oxygen.
You are given an unknown solution, which contains both aqueous barium ion, Ba2+ (aq), and aqueous lead(II) ion,
Pb²+ (aq). Which of your six solutions would allow separation of the ions?
Select all that apply.
A. Ammonium chloride, NH4Cl(aq)
B. Iron(II) nitrate, Fe(NO₂)(aq)
C. Nickel(1) chloride, NiCl(aq)
D. Silver nitrate, AgNO₂(aq)
E. Sodium hydroxide, NaOH(aq)
F. Sulfuric acid, H₂SO,(aq)
Answers
Given the six solutions, the solution that will separate aqueous barium ion and aqueous lead(II) ion is ammonium chloride.
In qualitative analysis, it is common to separate substances in solution by introducing a solution that preferentially precipitates one of the ions in solutions while leaving the other one in solution.
In this case, we know that all chlorides are soluble except those of lead, mercury and silver according to the solubility rules. Hence, if ammonium chloride is added to a solution of aqueous barium ion and aqueous lead(II) ion, lead II chloride is preferentially precipitated hence the ions are separated.
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Air pressure is greatest near the surface of the Earth in the _______.
Question 7 options:
Thermosphere
Mesosphere
Troposhere
Exosphere
Answers
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Air pressure is greatest near the surface of the Earth in the Troposphere .
does the character of a bond become more covalent or ionic when the difference in electronegativity of the bonded atoms increases?
