Answer:
Usually have a low relief, can be interior, and can be coastal.- are phrases that describe typical features of plains.
The phrase describes a typical feature of plains can be interior.
What is interior?The art as well as the science of improving the interior of the building to provide a healthier as well as more aesthetically pleasing environment for people who use it is known as interior design.
Plains are known for their low relief, interior location, as well as coastal location, all of which are characteristics of plains.
Therefore, The phrase describes a typical feature of plains can be interior.
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Which processes occur when energy is removed from a substance
Answer:
Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.
Neon is used in lighting advertising displays.
Which statement can be applied to an atom of neon?
A The atom has the same electron arrangement as Cl– ion.
B The atom has two more electrons than an atom of oxygen.
C The atom has the same number of outer electrons as an atom of helium.
D The atom has the same number of electrons as a Ca2+ ion.
Answer:
B. The atom has two more electrons than an atom of oxygen.
Explanation:
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Oxygen has a total number of eight (8) electrons while neon has total number of ten (10) electrons. Therefore, an atom of oxygen is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon with an atomic number of 10.
This ultimately implies that, an [tex] O^{2-} [/tex] atom contains the same number of electrons as an atom of neon.
Hence, a neon atom has two more electrons than an atom of oxygen.
Additionally, Neon is used in lighting advertising displays.
please help i will mark brainlist
Answer:
V= 21 cubic cm (( I am not sure about density ))
Explanation:
V= L×W×H
How many electrons do nonmetal atoms tend to gain when forming ions?
A. One or two
B. A number equal to their number of valence electrons
C. Only one
D. Enough to fill their valence shell
Answer:
D
Explanation:
I got that right:)
Nonmetal atoms tend to gain enough electrons to fill their valence shell when forming ions.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Part 1)
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation- Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Answer in units of g.
Part 2) What mass of MgCl2 is produced? Answer in units of g.
Part 3) What mass of H2 is produced? Answer in units of g.
Answer:
Part 1: 229.95g
Part 2: 598.5g
Part 3: 12.6g
Explanation:
Note: I learned this last week. Answer not sure.
Pls tell me if i got it right or wrong.
Mg + HCl - > MgCl2 + H2
First, balance the equation.
There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.
Mg + 2HCl - > MgCl2 + H2
Formula 1: (n= m/mr)
n = moles, m= mass, mr = molecular mass
Formula 2: (n= v/24)
v = volume
Part 1
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Ratio of
(look at the number in front of each)
2HCl : Mg
2 : 1
(3.15 x 2) : 3.15 moles
6.3 moles : 3.15 moles
So 2HCl has 6. 3 moles
Now use formula 1 (n = m/mr)
Calculate molecular mass of HCl
Check your periodic table
mr of HCl =(1 + 35.5) = 36.5
6.3 = m/36.5
m = 229. 95grams
Part 2
What mass of MgCl2 is produced? Answer in units of g.
Ratio of
2HCl : MgCl2
(1 +35.5) : (24+35.5x2)
36.5: 95
229.95g :?
229.95g : 598.5g
m = 598.5g
Part 3
What mass of H2 is produced? Answer in units of g.
2HCl : H2
36.5 : 2
229.95g :?
229.95g : 12.6g
m = 12.6g
PLEASE HELP ITS PAST DUE IM GIVING BRAINLIEST
Answer:
it will option A . hope it helps
Answer:
options A
Explanation:
the balloon filled up because of the formation of gas bubbles
Hold the slides for observation
30 points pls i need help
i need the right answer
Answer:
C
Explanation:
yes,
What do you think will happen if you put it above the tube that is over the hot soil?
Answer:
what is "it"
Explanation:
if it's a liquid it will boil
if it's a chemical it could burn or catch on fire
4 Fe + 6 H₂O + 3 O₂ → 4 Fe(OH)₃
Police found 10 grams of Fe(OH)₃ on the knife. Convert grams of rust (Fe(OH)₃) into grams of iron (Fe) to see if the knife contained enough to murder the butler.
345 g Fe
5.22 g Fe
7.34 g Fe
2.95 g Fe
Which of these is a rock commonly found in oceanic crust?
A basalt
B. granite
C. magnesium
D. iron
Answer:
B. Granite
Explanation:
The continental crust is thicker, 30 km (20 mi) to 50 km (30 mi) thick. It is mostly made of less dense, more felsic rocks, such as granite.
DONT HAVE MUCH TIME 4 MIN
21. The number of protons in an element is called the _______________ number.
22. Irene Curie used ___________________ as the source of alpha particles for her research.
23. Uranium goes through _____________ decay ____________ (a number) times to produce
Plutonium.
24. ________________ is a raw Uranium ore which was central to the discovery of radioactivity.
25. The ____________________ was cited in the letter signed by Einstein as having ore with
high concentrations of U-235.
Answer:
21. A to m i c number
22. P o l o n i u m
23. N e p t u n i u m -239, I don't know the second one
24. U r a n i n i t e
25. M a n h a t t a n Project
Explanation:
These are just my guesses, So some of them might not be correct.
What is the total amount of heat needed to change 2.25 kg of silver at 0.0°C to 200.0°C? The specific heat of silver is 0.129 J/g·°C (2.25 kg = 2250 g)
Answer:
Q = 5805 Joules.
Explanation:
Given the following data;
Mass = 2250g
Specific heat capacity of silver = 0.129 J/g·°C
Initial temperature, T1 = 0.0°C
Final temperature, T2 = 200.0°C
To find the quantity of heat needed;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.dt = T2 - T1
dt = 200 - 0
dt = 200°C
Substituting the values into the equation, we have;
[tex] Q = 225*0.129*200[/tex]
Q = 5805 Joules.
Therefore, the amount of heat needed is 5805 Joules.
Given values:
Mass, [tex]m = 2250 \ g[/tex]Specific heat capacity, [tex]0.129 \ J/g.^{\circ} C[/tex]Initial temperature, [tex]T_1 = 0.0^{\circ} C[/tex]Final temperature, [tex]T_2 = 200.0^{\circ} C[/tex]then,Change in temperature, [tex]dt = T_2-T_1[/tex][tex]= 200-0[/tex]
[tex]= 200^{\circ} C[/tex]
As we know the formula,
→ Heat capacity, [tex]Q = mcdt[/tex]
By substituting the values, we get
[tex]= 225\times 0.129\times 200[/tex]
[tex]= 5805 \ Joule s[/tex]
Thus the above answer is right.
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True or False: There are five (5) of Newton's Laws of Motion *
Answer:
False
there is three
Explanation:
Three laws are combined together which is further known to us as Newton ’s three laws of motion. These three newton’s laws of motion are: Law I – Newton’s first law of motion Law II – Newton’s second law of motion
Hope this helps :)
how many mililiters is 0.55 L
Answer:
It's 550 milliliters.
Explanation:
I hope this helps.
What does c represent in the carbon cycle diagram?
Answer:
carbon
Explanation:
I'm pretty sure if not
Answer:
The adjacent diagram shows the carbon cycle with the mass of carbon, in gigatons of carbon (Gt C), in each sink and for each process, if known. The amount of carbon being exchanged in each process determines whether the specific sink is growing or shrinking.
Can Someone Please help me answer this question? I will try to give brainliest.
Answer:
I believe the answer is y-axis
Explanation:
Sorry if it's not I just wanted to help you in return for helping me!!
Answer:
Y axis I think
Explanation:
please I don’t get this at all someone help
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Lithium 1s22s1
Chlorine 1s22s22p6 3s23p5
A. 1:1
B. 1:2
C. 2:1
D. 3:1
D. 3:1
Answer:
A. 1:1
Explanation:
Lithium 1s2 2s1
Chlorine 1s2 2s2 2p6 3s2 3p5
Lithium is a group 1 element. When it forms a compound, it loses it's one valence (outermost) electron.
Chlorine is a group 7 element. When it forms a compound, it gains one electron to achieve a stable electronic configuration.
Since Li loses one electron and Cl gains one electron. The formular of the compound formed would be;
LiCl
The correct option is;
A. 1:1
______ meters = 177 millimeters
Answer:
117 millimeters = 0.117 meters
Explanation:
This is using unit conversions. There are 1000 millimeters in 1 meter, so you would divide your starting value, 117 millimeters by 1000 millimeters. The units will cancel because they are being divided by themselves and you are left with 0.117 meters.
___________ is the least reactive metal.
i. Silver
ii. Iron
iii. Gold
iv. Sodium
If a section of DNA has 15% thymine, how much adenine will it have?
1. 15%
2. 30%
3. 60%
4.85%
Answer:
15% adenine
Explanation:
Thymine and adenine are a nitrogenous base pair so they would equal the same.
What happens when chromium nitrate is added to distilled water
Answer:
It does not react with water, but reacts with most acids
Explanation:
Answer:
It doesn't react with water, but reacts with most acids
What’s Neon family number? And period?
Answer:
18 and Period 2
Explanation:
Neon (Ne), chemical element, inert gas of Group 18
Neons period on the periodic table is period 2.
Which of the following has the smallest atomic radius?
a B
b Al
c F
d N
e Ga
Answer:
c. F
Explanation:
As you go top to bottom down a column of the periodic table, atomic radius increases.
As you go left to right across a period of the periodic table, atomic radius decreases.
Knowing this trend, that means that the smallest atomic radius would be located in the top right of the periodic table. The closest element to that point is fluorine, or answer C.
NEED HELP PLEASE. NOW
What pressure is exerted by 0.75 moles of a gas at 25°C
in a container with a volume of 1.5 L?
Answer:
1,239,284pa
Explanation:
Assuming it's an ideal gas we use
PV=nRT
P=nRT/V
then we convert our Temperature into Kelvin
T=25+273.15 =298.12K
we convert our volume into M cubed
1.5L =0.0015 cubic meter
P=nRT/V
P= (0.75×298.12×8.314)/0.0015
P = 1,239,284pa
In Period 2, as the elements are considered from left to
right, there is a decrease in
A. Nonmetallic character
b metallic character
C atomic mass
D ionization energy
Answer:
it will option B ,hope it helps
2 Hgo 2 Hg + O2
1. How many grams of mercury (Hg) can be
produced from 3.55 moles of Hgo?
Answer:
712 moles of Hg are produced
Explanation:
Based on the reaction:
2HgO → 2Hg + O₂
Where 2 moles of HgO reacts producing 2 moles of Hg and 1 mole of O₂
To solve this question we need to find the moles of Hg produced, then, using its molar mass:
Moles Hg:
3.55mol HgO * (2 mol Hg / 2 mol HgO) = 3.55 mol Hg
Grams -Molar mass Hg: 200.59g/mol-:
3.55mol Hg * (200.59g/mol) =
712 moles of Hg are produced
If you find yourself rushing to complete many different tasks at once, it may be useful to
a Work at home to get each task done as soon as possible
b. Recruit another co-worker to do your normal tasks
C. Clarify the deadlines for each of the tasks with your boss
d. Stop working on the tasks until someone asks about them
Answer:
its c
Explanation:
because i have the most wrinkly brain
If you find yourself rushing to complete many different tasks at once, it may be useful to clarify the deadlines for each of the tasks with your boss.
What do you do when you have many tasks at once?It is common in an office setting to be assigned many tasks to be completed within a short time frame. However, all these tasks must be prioritized in order.
Hence, If you find yourself rushing to complete many different tasks at once, it may be useful to clarify the deadlines for each of the tasks with your boss.
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How many significant figures are in this measurement: 1,250,500
