Answer:
A) 0.253 mol B) 0.7603 mol C) 2.276 mol D) MoS₃O₉ or Mo(SO₃)₃ E) molybdenum(VI) sulfite
Explanation:
For all the Mole problems you want to find divide grams of the element in compound by the molar mass of the element.
24.26 g Mo / 95.95 g = 0.2528
24.33 g S / 32.06 g = 0.7589 mol S
36.41 g O / 16 g = 2.276 mol O
S / Mo = 0.7587 mol / 0.2529 mol = 3/ 1
O / Mo = 2.276 mol / 0.2529 mol = 9/ 1
The empirical formula of the compound is MoS₃O₉ or Mo(SO₃)₃.
The number of mole of molybdenum present in the compound is 0.253 mole
From the question given above, the following data were obtained:
Mass of compound = 85 g
molybdenum = 24.26 g
Sulphur = 24.33 g
The number of mole of molybdenum in the compound can be obtained as follow:
Mass of molybdenum = 24.26 g
Molar mass of molybdenum = 95.95 g/mol
Mole of molybdenum =?Mole = mass / molar mass
Mole = 24.26 / 95.95
Mole of molybdenum = 0.253 moleTherefore, the number of mole of molybdenum present in the compound is 0.253 mole
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how does latitude affect the temperature in an area
Answer:
Latitudes are used to indicate a precise location of any feature on the earth's surface.
Temperature changes with latitudes .At higher latitudes, the Sun's rays are less direct. The farther an area is from the Equator, the lower its temperature. At the poles, the Sun's rays are least direct.Near the equator sun's rays are perpendicular resulting into very high temperatures. Generally, around the world, it gets warmer towards the equator and cooler towards the poles.
True or False Friction can be reduced by lubricating or changing the shape of objects
Answer:
True
Explanation:
If you cover cup in soap it will be a lot more slippery than it was before, if you reshaped a car wheel to have less treads then it would have much less friction.
What do YOU think? Is the movement to 100% renewable energy possible? Why, or why not?
Answer:
no. Because there is always that one person who doesn't want to
Which elements in the image are likely
to lose electrons in an ionic bond
A. neon and chlorine
B. calcium and
potassium. C.neon and
potassium
D. There is not enough information to tell
Which characteristic of planets depends upon its distance from the Sun?
Answer:
I think its the length of its year
Answer:
the length of its year
Explanation:
Which chemical equation is correctly balanced?
O Mg(NO3)2 + 2K2CO3 →→ MgCO3 + 2KNO3
O Mg(NO3)2 + K2CO3 → MgCO3 + 2 KNO3
2Mg(NO3)2 + K2CO3 - 2MgCO3 + KNO3
Mg(NO3)2 + K2CO3
MgCO3 + KNO3
Answer:
Mg (NO3)2+ K2CO3 ⇒ Mg CO3 + KNO3
Mg=1 ,N =2, O =6 +3 9 ,K =2 ,C=1 , (reactant side)
Mg =1, C = 1 ,O = 3+3 = 6 , K= 1., N =1 (product side)
Mg(NO3)2 + K2CO3 ⇒ Mg CO3 + 2KNO3
Mg =1 , C = 1, O =3+6=9, K = 2 IN product side
ANS:
Mg (NO3)2 +K2CO3 ⇒ MgCO3 +2 KNO3
Explanation:
define adhesion and give an example?
Similar to Cohesion, adhesion is the attraction between molecules of different substances . Water uses adhesion when it's attraction to another substance is greater than the water's attraction to itself. if you have ever dropped a cup of water on a hardwood floor,you know that it spreads out instead of foaming beads.
Identify the following as an element or compound: sucrose/sugar (C12 H22 O11)
Answer:
Explanation:
its a compound
is there an ultimate particle?
Answer:
We learn in school that matter is made of atoms and that atoms are made of smaller ingredients: protons, neutrons and electrons. Protons and neutrons are made of quarks, but electrons aren’t. As far as we can tell, quarks and electrons are fundamental particles, not built out of anything smaller.
Answer:
The recent discovery declared that the finding is very close to the ultimate particle called Higgs particle. This is believed to be the basic building block of the universe.
Explanation: hope this help
HELP PLEASE
A positive test for a base occurs when
A) red litmus remains red
B) blue litmus remains blue
C) blue fitmus turns red
D) red litmus turns blue
Answer:
D) red litmus turns blue
Explanation:
Took this test, hope it helps! :)
HNO3 + H2SO4 + NO
You now have these half-reaction equations:
3e + HNO3 → NO
S→ H2SO4 + 6e
Which factor will you use for the top equation?
Which factor will you use for the bottom equation?
Explanation:
The two half equations are;
3e + HNO3 → NO
S→ H2SO4 + 6e
When balancing half equations, we have to make sure the number of electrons gained is equal to the number of electrons lost.
Which factor will you use for the top equation?
We multiply by 2 to make the number of electrons = 6e
Which factor will you use for the bottom equation?
We multiply by 1 to make the number of electrons = 6e
Answer:
2
1
Explanation:
is h2o a pure element or a compound
Calculate the mass of 5.22 mol of He.
Answer:
The mass is 20, 89 grams of He.
Explanation:
We calculate the weight of 1 mol of He, from the atomic weight of each element obtained from the periodic table: Weight 1 mol He= 4, 0020602 g. 1 mol He-----4, 0020602 g. 5,22 mol He---x= (5,22 mol He x4, 0020602 g)/ 1 mol He= 20, 89 g
hope this helps also can i get brainliest
The mass of 5.22 mol of He will be 20.84 grams.
We have 5.22 mol of He.
We have to calculate its Mass.
Which element is represented by symbol He ?Helium is a chemical element with the symbol He and atomic number 2. It is a gas which is colorless, odorless, tasteless, non-toxic, inert and monatomic.
According to the question -
Number of moles of Helium = 5.22 mol
Now, I mole of Helium will have its mass equal to its Atomic weight. Therefore -
Mass of 1 mole of He = 4.002602 g
So, the mass of 5.2 mol of He will be = 5.2 x 4.002602 = 20.84 grams
Hence, the mass of 5.22 mol of He will be 20.84 grams.
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The the _____ temperature _____ the the air molecules move. (Choose 2) higher, faster lower, faster lower, slower higher, slower
Answer:
The higher the temperature the faster the air molecules move. / The lower the temperature the slower the air molecules move.
Explanation:
Both answers work. Higher temp = more energy = moving faster, and the opposite applies. Lower temp = less energy = moving slower.
Balance the equations of Al(OH)3+HNO3----Al(NO3)3+H2O
Answer:HNO3 + Al(OH)3 → Al(NO3)3 + H2O
Word equation: Nitic acid + Aluminum hydroxide → Aluminum nitrate + water
Type of Chemical Reaction: For this reaction we have a neutralization reaction.
Balancing Strategies: In this neutralization reaction we have HNO3 reacting with Al(OH)3.
Be sure to carefully count the O and H atoms on both sides of the equation, otherwise this will be a difficult equation to balance.
Hint 1
Start by balancing the N atoms.
Hint 2
Next balance the H atoms.
This is the balence form of it
3HNO3+ Al(OH)3 = Al(NO3)3 +3H2O
Explanation:
Josh used several different liquid chemicals for an experiment in his chemistry class. After completing the experiment, the chemicals were no longer usable. Josh carefully poured each chemical into a bottle marked "Waste" and placed the lid back on the bottle. Did Josh use the correct procedure?
A.
No; different types of chemical waste should not be mixed together.
B.
No; the chemicals should have been poured down the sink.
C.
No; the chemicals should have been poured into the trash can.
D.
Yes; the chemicals were stored in the proper place.
what is the shape of graphite
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.
1. How many particles are present in 800 grams of copper (II) sulfide, CuS? The molar mass of CuS is 95.611 g/mol.
2. How many particles are present in 50 grams of aluminum oxide, Al2O3? The molar mass of Al2O3 is 101.961 g/mol.
3. How many particles are present in 150 grams of calcium oxide, CaO? The molar mass of CaO is 56.077 g/mol.
4. How many particles are present in 39 grams of sulfuric acid, H2SO4?
5. How many particles are present in 345 grams of hexane, C6H14?
How do ionic bonds differ from covalent bonds? I NEED HELP QUICK PLSSS!!!!!
Answer:
.
Explanation:
Answer:
Ionic bonds are usually between a metal and a nonmetal and involve the transfer of electrons. Covalent bonds are typically between two nonmetals and involve the sharing of electrons.
Explanation:
When elements bond together ionically, they transfer their valence electrons to another element to satisfy the octet rule and create full shells of 8 electrons. Metals usually have low electronegativity and ionization energy and can more easily give up an electron to a nonmetal with higher electronegativity and ionization energy.
When two nonmetals bond, their electronegativities are close enough in magnitude that neither element can "claim" the valence electrons, so the electrons orbit back and forth between the elements in the bond.
is gold an example of a metal or nonmetal
Answer:
Gold is a metal lol
Explanation:
Chemically, gold is a transition metal and a group 11 element
Please help me ASAP!!
Chemistry
Based on the information in the table, which of the following arranges the bonds in order of decreasing polarity?
Answer:
F,Cl,N,I,Se,H
Explanation:
polarity increases as electronegativity increases i guess so that is supposed to be the answer
Which of the following correctly shows the bond polarity?
please help me asap!
c. H-I>Se-N>Cl-F
that is the answer i think...
True or false: Breaking down water into the elements hydrogen and oxygen is an example of a chemical change.
Answer:
True.
Explanation:
When water is decomposed into hydrogen and oxygen, chemical bonds are broken, chemical energy is released, and two new substances are formed from one.
At a constant temperature the pressure on a 10.0L sample of gas is charged from 1140 torr to 1.00 atm. What is the new volume of gas sample?
Answer:
15 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 10 L
Initial pressure (P₁) = 1140 torr
Final pressure (P₂) = 1 atm
Final volume (V₂) =?
Recall:
1 atm = 760 torr
The new (i.e final) volume of the gas can be obtained as follow:
Initial volume (V₁) = 10 L
Initial pressure (P₁) = 1140 torr
Final pressure (P₂) = 760 torr
Final volume (V₂) =?
P₁V₁ = P₂V₂
1140 × 10 = 760 × V₂
11400 = 760 × V₂
Divide both side by 760
V₂ = 11400 / 760
V₂ = 15 L
Therefore, the new volume of the gas is 15 L
In the photo, what does the green line with the arrow represent?
M
Answer:
if im not mistaken that's a jetstream
How many moles of gas are in a 30 liter compressed air tank if the
temperature of the tank is 300K and the pressure is 200 atmospheres? *
Answer:
B
Explanation:
lable each change as chemical or physical
Answer:
we need the picture
Explanation:
9. If 1,785 cal of heat is added to a 343 g sample of water (specific heat = 4.18J/g °C) at 1202,
what is the *final temperature of the water? *
(1 Point)
15.76°C
031'c
18.24°C
1.24°C
Answer:
17.21°C
Explanation:
Using the following formula;
Q = m × c × ∆T
Where;
Q = amount of heat in joules
m = mass of substance in grams
c = specific heat capacity of water (4.184 J/g°C)
∆T = final temperature - initial temperature
According to the information provided in this question,
Q = 1,785 cal
1 cal = 4.184 J
1785 cal = 7468.4J
m = 343grams
c = 4.18J/g °C
initial temperature = 12°C
Using Q = m × c × ∆T
7468.4 = 343 × 4.18 × (T - 12)
7468.4 = 1433.74(T - 12)
7468.4 = 1433.74T - 17204.88
7468.4 + 17204.88 = 1433.74T
24673.28 = 1433.74T
T = 24673.28 ÷ 1433.74
T = 17.21°C
Which statement BEST describes electromagnetic and mechanical waves?
A.
Electromagnetic waves and mechanical waves both do not require a medium.
B.
Mechanical waves require a medium and electromagnetic waves do not.
C.
Electromagnetic waves require a medium and mechanical waves do not.
D.
Mechanical waves and electromagnetic waves both require a medium.
Answer:
C I believe
Explanation:
Which organic prefix is matched with the number of carbon atoms that it represents?
Answer:heat-,7
Explanation:According to table P, heat- is an organic prefix used to represent 7 carbon atoms
Hept-7 is an organic prefix matched with the number of carbon atoms that it represents.
The correct option is A.
What is an organic prefix?The prefix is the words that are attached prior to the words to modify their meaning.
In organic chemistry, prefixes are added to show the number of carbon present in any compound.
Hepta is used for 7, the same Octa is for eight, Penta is for five, Hexa is for six, and so on.
Thus, the correct option is A, Hept-7.
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