Answer:
Exothermic
Explanation:
Explain why rain water is not pure
Answer:
before it evaporated into the air, it was on the Earth...and it could have been contaminated/dirtied. There isn't a process during evaporation that cleans water...you have to purify it yourself.
Explanation:
List 3 properties of solids. Do the same for liquids and gases.
Answer:
GAS .assumes the shape and volume of its container
particles can move past one another
.compressible
lots of free space between particles
.flows easily
particles can move past one another
LIQUID assumes the shape of the part of the container which it occupies
particles can move/slide past one another
.not easily compressible
little free space between particles
.flows easily
particles can move/slide past one another
SOLID .retains a fixed volume and shape
rigid - particles locked into place
.not easily compressible
little free space between particles
.does not flow easily
rigid - particles cannot move/slide past one another
ito ang kontinenteng nagtataglay ng pinakamaraming bansa sa lahat ng kontinente
Answer:
Africa
Explanation:
Ang Africa ay ang kontinente na mayroong pinakamataas na bilang ng mga bansa sa lahat ng mga kontinente.
Kasalukuyan, ang bilang ng mga bansa sa kontinente ay 54, ito ay 53 bago ang South Sudan ang pinakabagong sumali.
Ang bilang na ito ay pinaniniwalaang tataas sa mga darating na taon dahil sa kaguluhan ng iba't ibang mga segment sa ilang mga bansa para sa kalayaan
organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)
Answer:
He
O
Ge
Sr
Ba
Explanation:
An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.
In general, the size of an atom will decrease as you move from left to the right of a certain period.
Friendship is delicate as a glass, once broken it can be fixed but there will always be cracks. Two persons cannot long be friends if they cannot forgive each other's little failings. We all lose friends.. we lose them in death, to distance, and over time.
Answer:
make a new friend if you lose one, Its part of life losing people thats what make us people grow and be more mature.
g. I am present in meteorites and in the sun. When pure, I am a strong, lustrous, white metal, with a low
density. I have excellent corrosion resistance. I burn in air and am the only element that burns in
nitrogen. I am marvelous in fireworks. What am I, and what is my symbol?
I think the answer should be titanium, the symbol is Ti.
It is a mixture that consists of a liquid solvent and dissolved solute.
Answer:
A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . ... The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
Answer:
A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .
Explanation:
⚠️⚠️ period and group PLEAAE CHECK OUT THE QUESTIONNS IMAGE ⚠️⚠️
Answer:
group 5, period 7
I need help please
Answer: If you think about it, B. would be the most reasonable answer with the given factors.
Problem Page Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure Is the proposed Lewis structure reasonable? Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:*
The question is incomplete, the complete question is shown in the image attached.
Answer:
1) No, it has the right number of valence electrons but does not satisfy the octet rule.
2) Yes
3) No, it has the wrong number of valence electrons, the correct number is 16
Explanation:
If we look at the first structure in the image(HCN), it easy to see from inspection that nitrogen has three valence electrons as it is normally supposed to have. However, if we count all the electrons around nitrogen, we will notice that they are six instead of eight. Thus nitrogen has not satisfied the octet rule here.
The structure HBr satisfies the octet rule, hence it is a reasonable Lewis structures for the compound shown.
CO2 has 16 valence electrons but the structure shown contains about 20 valence electrons hence it is not a reasonable Lewis structure for the compound.
Yes, in HCO⁺ the proposed lewis structure is reasonable.
No, COCl₂ has the wrong number of valence electrons.
No, OH⁻ has the right valence electron but does not obey the octet rule.
The correct structure for the question can be seen in the image attached below.
In the proposed structure, the number of valence electrons in HCO⁺ is: ( 1 + 4 + (6-1) ) = 10e⁻Thus, the atoms obey the octet rule and the number of calculated valence electrons corresponds with what we have in the given structure.
Yes, the structure is correct and reasonable.
In COCl₂, the central carbon bonding to the oxygen is supposed to be doubly bonded and not singly bonded.the number of valence electron in COCl₂ is: ( 4 + 6 + (7 × 2)) = 24e⁻The calculated number of valence electrons is different from the given structure of 26e⁻, so we can say No, it has a wrong number of valence electrons.
In the third structure, oxygen is supposed to have three lone pairs of electrons in order to obey the octet rule.the number of valence electrons in the structure is: (6 + (1+1) = 8e⁻
But both H, as well as, O do not obey the octet rule. Therefore, we say No, it has the right number of valence electron but do not obey the octet rule.
Learn more about valence electrons here:
https://brainly.com/question/12717954?referrer=searchResults
can u help me with my science problems
Answer:
what is the question
Explanation:
what do you need help with
Is calcium chloride reactive?
Answer:
Yes it is
Explanation:
calcium chloride releases heat in an exothermic reaction.
yes.
hope is helps! :)
Which sublevel comes after 4d orbital
Answer:
5s
Explanation:
The 4d sublevel is filled next, after the 5s sublevel.
Match each label below with the appropriate term. Note: there may be more than one correct answer.
nonbonding electrons
sigma bond
represents two electrons
Answer: sigma bond
Represents two electrons
Explanation:
E2020
Answer:
Sigma Bond AND Represents two electrons.
Explanation:
the amplitude of a wave is measured from
A. Trough to trough
B. Crest to resting position
C. Crest to crest
D. Crest to trough
How many atoms of aluminum (Al) are contained in 3.73 moles of alumni
Number of atoms : 2.245 x 10²⁴
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
n= 3.73 moles
Number of atoms :
[tex]\tt 3.73\times 6.02\times 10^{23}=\boxed{\bold{2.245\times 10^{24}}}[/tex]
CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION
Wrong or inproper answer will be reported
The mass of unreacted zinc = 13 g
Further explanationThe reaction equation is the chemical formula of reactants and products
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reactants and products
Reaction
[tex]\tt Zn+2HCl\Rightarrow ZnCl_2+H_2[/tex]
mol ratio Zn : HCl = 1 : 2
mol of HCl[tex]\tt mol=V\times M\\\\mol=0.1~L(100~cm^3)\times 2~mol/L\\\\mol=0.2[/tex]
mol of Zn[tex]\tt \dfrac{1}{2}\times 0.2=0.1~mol[/tex]
the mass of reacted Zn :[tex]\tt 0.1\times 65=6.5~g[/tex]
the mass of unreacted Zn[tex]\tt 19.5-6.5=\boxed{\bold{13~g}}[/tex]
A glass of milk occupies a volume of 50.0 mL and has a mass of 52.0. what is its density
Answer: 1.04 is the density. Explanation: Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. 52.0/50.0=
Political considerations played a great role in the decision for the United States to enter the Space
Race.
True
False
True
The Cold War & tensions with Russia led to the great Space Race. Getting into space was a goal of the US as well as Russia and whomever got into space would be considered superior in the world's perspective
please help!! my grades dying
15 points
Answers-in-bold:
There are two common temperature scales. On the Fahrenheit scale, water freezes at 32 degrees. The Celsius scale divides the interval between the freezing and boiling points of water into 100 degrees.
How would you describe the conditions in the lower mantle?
Answer:
hi..
Explanation:
The lower mantle is hotter and denser than the upper mantle and transition zone. The lower mantle is much less ductile than the upper mantle and transition zone. Although heat usually correspond s to softening rocks, intense pressure keeps the lower mantle solid. Geologists do not agree about the structure of the lower mantle.
hope this helps ._.
very hot at temperatures, i think i would set it to 43 degrees celsius as its much colder and better
hope this helps!
HELP PLZ
Bonding Models How can electron dot formulas be used to illustrate the anions or cations of elements?
Answer:
the anwcer on edg 2020 is yes
HOPE THIS HELPS
Explanation:
Mark is pushing a box down the hall. Mark is using 5N to push the box 20m. How much work is Mark doing?
The work by Mark : 100 J
Further explanationWork is the transfer of energy caused by the force acting on a moving object
Work is the product of force with the displacement of objects.
Can be formulated
[tex]\tt W=F\times d[/tex]
W = Work, J, Nm
F = Force, N
d = distance, m
Mark is using 5N to push the box 20 m,
F = 5 N
d = 20 m
[tex]\tt W=5\times 20\\\\W=100~J[/tex]
Which of the following numbers is in correct Scientific Notation
13.6x103
174.5
O 0.26x10-2
1.5x105
Question 6
Answer:
1.5 x 10⁵
Explanation:
Scientific notation always starts in the 1's place (1.)
EXPLANATION OF THE MESOSPHERE ASAP PLSSS
Helppppp fast please will give brainliest
Answer:
9.32×10⁻³
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
How to add the number in scientific notation with same exponent.
7.21 ×10⁻³ + 2.11 ×10⁻³
exponent of both values are same thus we will take it common.
[7.21 + 2.11 ]×10⁻³
9.32×10⁻³
Any one know the answer?
[tex]1 \: mol MgSO4 \: has \: 4 \: oxygens[/tex]
Thus ;
[tex]2 \: mols \: of \: should \: have \: 8 \: oxygens[/tex]
So the correct answer is (( 8 مول ))
Calculating Density A sample of a sub-
stance with a mass of 85 g occupies a vol-
ume of 110 cm What is the density of
the substance? Will the substance float
in water? Explain your answer:
Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{85}{110} \\ = 0.772727272...[/tex]
We have the final answer as
0.77 g/cm³The substance will float on water since it's density is less than that of water which is
1 g/cm³.
Hope this helps you
Trillions of cells join together to form ?
Answer: you like your body and tissue and organs and stuff
Explanation: it takes so much cells because of them being so small but with out them we would not be at all the same
QUESTION 2: How is velocity different from speed? *
1 point
Velocity is when an object goes in reverse
Velocity is the direction an object moves in, and it has nothing to do with speed
Velocity is speed and direction together
Answer:
Speed is the rate at which an object covers distance.
Velocity is the speed of something in a given direction.