Answer:
A
Explanation:
Your answer would be A because Earth is formed from cold gases collapsing due to gravity. The Solar System was formed when a huge amount of dust and gas began to collapse under its own gravity, and as the cloud collapse it started to spin causing the material within the cloud to gather into a swirl and then formed into planets and as the planets are formed they kept this spinning motion.
Please help me this is my fourth attempt.
Explanation:
CH4 + 4S ---> CS2 + 2H2S
4) 0.75 mol S × (1 mol CS2/4 mol S) = 0.19 mol CS2
5) 3 mol H2S × (1 mol CH4/2 mol H2S) = 1.5 mol CH4
Fe2O3 + 2Al ---> 2Fe + Al2O3
6) 25 g FeO3 × (1 mol Fe2O3/159.69 g Fe2O3) = 0.16 mol Fe2O3
0.16 mol Fe2O3 × (2 mol Al/1 mol Fe2O3) = 0.32 mol Al
0.32 mol Al × (26.98 g Al/1 mol Al) = 8.6 g Al
7) Given:
45 g Al × (1 mol Al/26.98 g Al) = 1.6 mol Al
85 g Fe2O3 ×(1 mol Fe2O3/159.69 g Fe2O3)
= 0.53 mol Fe2O3
Let's look at how much Fe each reactant will produce:
1.6 mol Al × (2 mol Fe/2 mol Al) = 1.6 mol Fe
0.53 mol Fe2O3 × (2 mol Fe/1 mol Fe2O3) = 1.1 mol Fe
Note that the given amount of Fe2O3 will give us fewer Fe. Therefore, Fe2O3 is the limiting reactant.
8) Al will produce 1.6 mol Fe × (55.845 g Fe/1 mol Fe)
= 89 g Fe
Fe2O3 will produce 1.1 mol Fe × (55.845 Fr/1 mol Fe)
= 61 g Fe
9) Since Fe2O3 is the limiting reactant, the ideal yield of Fe for the reaction is 61 g. If the actual reaction only gave us 25 g Fe. then the percent yield of Fe is
%yield = (25 g Fe/61 g Fe) × 100% = 41%
10) If we only got 25 g Fe, then the amount of Al actually used in the reaction is
25 g Fe × (1 mol Fe/55.845 g Fe) = 0.45 mol Fe
0.45 mol Fe × (2 mol Al/2 mol Fe) = 0.45 mol Al
0.45 mol Al × (26.98 g Al/1 mol Al) = 12 g
Therefore, the leftover amount of Al is
25 g Al - 12 g Al = 13 g Al
10. What is the mass of 2.6 moles of Ag?
O 2.4 x 10-2 g
O 2.9 g
O 280 g
O 1.6 x 1024 g
Answer: 280 g
Explanation:
Where do CFCs come from?
A:spray cans
B :fire extinguishers
C:Air conditioner
D: manufacturing foams
Or all above
Answer:
all of the above
Explanation:
Answer:
All of the above
Explanation:
Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.
Which of the following describes a characteristic of water that makes it cohesive in nature?
O It is a non-polar molecule with weak hydrogen boding.
O It has a linear molecular structure with H-O-H arranged in a straight line.
O It has a huge electronegativity difference between its atoms.
O It requires a high amount of heat to raise or drop its temperature.
Answer:
it has a huge electronegativity difference between it's atoms
The characteristic of water that makes it cohesive in nature is,
It has a huge electronegativity difference between its atoms.So, option C is correct one.
Why water is cohesive in nature?The water molecule contains two hydrogen atoms and oxyegen atom. The electronegativity of hydrogen atoms and oxyegen atom is 2.1 and 3.44Due to high electronegativity of oxygen ,it can attract the bonded pair of electron of hydrogen and form a strong bond and make it cohesive in nature.What are major characteristics of water?The water molecule have unique characteristics among all some are given below.
Water is polar, with partial positive charge on two hydrogen and partial negative charge on one oxygen.Water is act as solvent and dissolves the polar and ionic substance.Water has high heat of vaporization.Water has cohesive and adhesive properties.Water has high heat capacity.learn about water molecule,
https://brainly.com/question/26529979
#SPJ2
b. Calculate The number of moles of hydrochloric acid in 10 mL of 6.0 M HCI; 6,0 M HCl contains 6 moles
of HCI per liter of solution.
Answer:
hydrochloric acid has a molar mass of
36.46 g/mol
, which means that the
164-g
sample will contain
164
g
⋅
1 mole HCl
36.46
g
=
4.498 moles HCl
As you know, molarity is defined as moles of solute, which in this case is hydrochloric acid, divided by liters of solution
molarity
=
moles of solute
liters of solution
A
6.0-M
hydrochloric acid solution will contain
6
moles of hydrochloric acid for every liter of solution. This means that
4.498
moles will come with a volume of
c
=
n
V
⇒
V
=
n
c
V
=
4.498
moles
6.0
moles
L
=
0.7497 L
The number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is 0.06 mol.
Number of moles of the hydrochloric acidThe number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is claculated as follows;
Molarity = number of moles / Volume of the solution (L)
where;
volume of the hydrochloric acid = 10 mL = 0.01 LMolarity of the hydrochloric acid = 6 MNumber of moles = 0.01 x 6
Number of moles = 0.06 mol.
Thus, the number of moles of hydrochloric acid in 10 mL of 6.0 M HCI is 0.06 mol.
Learn more about number of moles here: https://brainly.com/question/15356425
Did NASA invented thunderstorms to cover up the sound of space battles
Answer:
Nope.
Explanation:
No, I do not believe that NASA invented thunderstorms to cover up the sound of space battles. For example, Benjamin Franklin is noted to have experimented with lightning in the 1700s, well before NASA or NACA existed. Therefore, NASA did not invent the concept of thunderstorms.
if you expect the unexpected is it still unexpected??
What type of circuit does this figure represent?
A an open parallel circuit
B closed parallel circuit
C open series circuit
D closed series circuit
Answer:
If it has two resistance one upon another its a parallel circuit but if the resistance move on a line (doesn't matter if it bend ) and if a flap is send open then its a open circuit if the system line connecting the circuit ect is smooth and without any uponing lines them it is a close circuit
Explanation:
What is the molar mass for Li2S?
Answer:
44.882
Explanation:
Li2S is made up of 2 Li and 1 S
Li's molar mass is 6.941 * (2) = 13.882
S's moalr mass is 32 * (1) = 32
add 12.882 + 32 = 44.882
let me know if you have questions!
If a gas occupies 2.3 liters at a pressure of 1.9 atm, what will be its volume at a pressure of 3.8 atm?
Answer:
1.2L
Explanation:
how do flowering plants depend on other living things in order to reproduce?
Answer:
They depend on people to water them and make sure they are by a window for sunlight
Explanation:
plants cant do these things by themselves
Answer:
Most flowering plants depend on animals to make the vital pollen-gran delivery. The remaining rely on wind and sometimes splashing raindrops to ferry pollen, but this is a less precise method. pollinating animals do the job for a reward: food, usually in the form of nectar.
Explanation:
A gas has a volume of 62.65 L at stp. At what temperture in C would the volume of the gas be 78.31 at a pressure of 612 mm hg
Answer:
1.79°C
Explanation:
Applying,
PV/T = P'V'/T'................. Equation 1
Where P = Initial presssure, V = Initial volume, T = Initial temperature, P' = Final pressure, V' = Final volume, T' = Final Temperature.
make T' the subject of the equation
T' = P'V'T/PV................ Equation 2
From the question,
Given: P = 760 mmHg (Standard pressure), T = 273 K (Standard temperature), V = 62.65 L, P' = 612 mmHg, V' = 78.31
Substitute these values into equation 2
T' = (612×78.31×273)/(760×62.65)
T' = 274.79 K
T' = (274.79-273) °C
T' = 1.79°C
How many grams of C2H4 are needed to produce 3.7 moles of water?
Explanation:
3.7 mol H20×1 mol C2H4 ×28.05 g C2H4 =51.9 g C2H4 2 mol H20 1 mol C2H4 C.
When a system is out of equilibrium, it will
Answer:
Basic concepts
Driven complex fluids, turbulent systems and glasses are other examples of non-equilibrium systems. The mechanics of macroscopic systems depends on a number of extensive quantities. ... The latter are the thermodynamic forces driving fluxes of extensive properties through the system.
Explanation:
I hope it's help u
In three molecules O2, HCI, and F2, what atom would have a partial negative charge, setting up a dipole moment?
A) oxygen
B) hydrogen
C) chlorine
Answer: a.Oxygen
Explanation:
put have has or had where appropriate in the following sentence, Exam malpractices_______become a serious issue
Answer:
has
Explanation:
has
Answer:
has
Explanation:
2) Which one is not an ionic compound?
a) LiCl
b) MgBr 2
c) CaO
d) HCl
Answer:
A
Explanation:
LiCl is an ionic compound because Li is a metal (all elements in the first 2 rows are metals) and chlorine is a non-metal.
Read the following sentences. Explain in your own words the meaning of the
italicized word or group of words. Write your response on the line below.
Answer:
the answer is in the photo hope it helps❤❤
They have one electron in the outermost electron shell. These are very active metals and easily lose their single valence electron.
Answer: The statement they have one electron in the outermost electron shell. These are very active metals and easily lose their single valence electron, is true.
Explanation:
Metals are the species which tend to lose electron(s) to acquire stable noble gas configuration.
Elements which tend to lose a single electron in order to acquire stability are active in nature because losing one electron is more easy as compared to losing two or more electrons.
For example, atomic number of sodium is 11 and its electronic distribution is 2, 8, 1.
Since, it contains only one valence electron and by losing it sodium will acquire stability. Hence, sodium is a very reactive metal.
Thus, we can conclude that the statement they have one electron in the outermost electron shell. These are very active metals and easily lose their single valence electron, is true.
5. Which type of substance yields hydrogen ions, H+, in
an aqueous solution?
A) an Arrhenius acid
B) an Arrhenius base
C) a saturated hydrocarbon
D) an unsaturated hydrocarbon
Answer: An Arrhenius acid is a type of substance yields hydrogen ions, [tex]H^{+}[/tex], in an aqueous solution.
Explanation:
Substances that give dissociate to give hydrogen ions or protons when dissolved in an aqueous solution are called Arrhenius acid.
For example, HCl is a strong acid and upon dissociation in water it gives the following ions.
[tex]HCl \rightarrow H^{+} + Cl^{-}[/tex]
Thus, we can conclude that an Arrhenius acid is a type of substance yields hydrogen ions, [tex]H^{+}[/tex], in an aqueous solution.
In a closed chamber, 58 grams of propane gas and 220 grams of oxygen gas are sparked to initiate the combustion reaction shown below. C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) What is the limiting reagent in this reaction?
propane
oxygen
water
carbon dioxide
Answer:
C) Propane
Explanation:
It's literally all I know
Someone please help will mark as brainliest
What’s a element that is a non metal, contains 7 valance electron, 3 energy levels?
The answer is Cl.
Group/family 18, the Nobel Gases, have full octets of 8 valence electrons. Each time you move to the LEFT one time within the nonmetals on the Periodic Table, an electron is lost. So, any element in group/family 17 would have 7 valence electrons (you can check this by drawing Bohr diagrams for each element within group/family 17).
So, we now know that the element is a nonmetal found in group/family 17. Therefore, it is found in the "p" block. For elements found in the "p" block, periods represent energy levels.
Suggest one reason why the student should not add potassium metal to copper sulfate solution.
Answer:
xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd xd
The student should not add potassium metal to copper sulfate solution because a redox reaction takes place between potassium metal and copper sulfate solution.
What is Redox reaction ?The reaction in which loss of electron and gain of electron takes place simultaneously is called redox reaction.
The reaction in which oxidation and reduction takes place simultaneously is called redox reaction.
To learn more about redox reaction here.
https://brainly.com/question/13293425
#SPJ3
Matter will come in two different types. What are they called?
Answer: They are called substances and mixtures
Explanation:
Answer:
pure substances and mixtures.
Explanation:
Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.
PLEASE MARK ME BRAINLIEST >:3
Soda water is water that has bubbles of carbon dioxide in it,
soda water is…
a) mixture
b) a molecule
c) an element
d) a compound
Answer:
it is a mixture.
Explanation:
Soda water is a solution of water (H2O) and carbon dioxide (CO2). It has a variable composition and there are not chemical bonds involved.
There is some chemical reaction between CO2 and H2O, producing some carbonic acid H2CO3. This is what gives a slight acidity to soda water.
The correct option for the given question about Mixtures is Option A) Mixture
Why Soda water is a mixture?A mixture of water (H2O) and carbon dioxide is soda water (CO2). There are no chemical bonds present, and it has a variable composition.
It is also called carbonated water as CO2 is first compressed and then get dissolved in it.
The chemical interaction between CO2 and H2O results in the production of H2CO3, a carbonic acid. This is what gives soda water a little acidity.
If the water is somewhat cold in temperature, gas can dissolve in it. The less soluble gas is, the hotter the water is. Additionally, more gas may dissolve in water at greater pressures for the water and gas combination.
Thus we can conclude that Soda water is a homogenous mixture of water and carbon dioxide.
Learn more about mixtures here:
https://brainly.com/question/1917079
#SPJ2
Which model illustrates a compound A, b, c, d,
Answer: C
Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)
Oxygen has a very low boiling point and is a gas at room temperature. Water has a much higher boiling point and is a liquid at room
temperature. Which of these statements would support these facts?
A)
Oxygen is an element while water is a compound.
B)
Oxygen is diatomic and exist as O2 in nature.
Water has a higher attraction between its molecules than oxygen.
D)
Water is a molecule with 3 atoms and oxygen exists in groups of 2.
Answer is C
what is advantages of sunlight
Answer:
Advantages of sunlight are .
it gives us vitamin D preventing disease, and promoting good mental healthhope it is helpful to you
Answer:
it helps in photosynthesis for plant
it give us vitamin D
it can prevent us from many types of diseases
it can help in our house works also
If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 42 days?
Answer:
1250
Explanation:
Used a half life calculator, put in the given variables, and the answer was the remaining quantity. Got it right on the test as well
The answer is 1250 grams of substance will be left after 42 days.
What is Half Life ?Half-life time is the time needed for the reactants to be in its half concentration.
It is known that the decay of a radioactive isotope obeys first order kinetics.
Also, it is clear that in first order decay the half-life time is independent of the initial concentration.
If reactant has initial concentration [A₀],
after half-life time its concentration will be ([A₀]/2).
The half-life time of the substance = 14 days.
42 days means 3 half life
After 1 half life the substance left is
= 10000/2
= 5000 grams
After second Half Life
=5000/2
=2500 grams
After Third Half Life
=2500/2
=1250 grams
Therefore 1250 grams of substance will be left after 42 days.
To know more about Half Life
https://brainly.com/question/24710827
#SPJ2
Describe what happens to the SIZE and SHAPE of sediment particles as they go through the process of abrasion
Answer:
They become smaller and more rounded
Explanation:
