Answer:
Al2(SO4)3 -> Al2O3+3SO3
Explanation:
No need of much explanation
During the time balancing the equations just see the no. of atoms on either side of the reaction I.e the reactant and product side make them equal by multiplying with some integers that's it!!
Which of the following is an
example of cohesion?
Answer:
Explanation:
Which of the following elements is not an inner transition metal
Iron
Lanthanum
Uranium
Actinium
Answer:
lanthanum
Explanation:
lanthanum is an inner transition metal
What do the digestive system and skeletal system have in common?
Answer:
Answer:Your skeletal system relies on the nutrients it gains from your digestive system to bulid strong healthy bones .A body system is a group of parts that work together to serve a common purpose .
maybe this might be ur answer
Pls help i have no clue what the right answers are
_4_NH3 +_3_02 ---> _2_N2 + __6_H20
How many moles of oxygen react with 0.69 moles of NH3?
Answer:
I hope this will help you and Please mark me as Brilliant
Explanation:
Consider this balanced chemical equation:
2 H2 + O2 → 2 H2O
We interpret this as “two molecules of hydrogen react with one molecule of oxygen to make two molecules of water.” The chemical equation is balanced as long as the coefficients are in the ratio 2:1:2. For instance, this chemical equation is also balanced:
100 H2 + 50 O2 → 100 H2O
This equation is not conventional—because convention says that we use the lowest ratio of coefficients—but it is balanced. So is this chemical equation:
5,000 H2 + 2,500 O2 → 5,000 H2O
Again, this is not conventional, but it is still balanced. Suppose we use a much larger number:
12.044 × 1023 H2 + 6.022 × 1023 O2 → 12.044 × 1023 H2O
These coefficients are also in the ratio of 2:1:2. But these numbers are related to the number of things in a mole: the first and last numbers are two times Avogadro’s number, while the second number is Avogadro’s number. That means that the first and last numbers represent 2 mol, while the middle number is just 1 mol. Well, why not just use the number of moles in balancing the chemical equation?
2 H2 + O2 → 2 H2O
is the same balanced chemical equation we started with! What this means is that chemical equations are not just balanced in terms of molecules; they are also balanced in terms of moles. We can just as easily read this chemical equation as “two moles of hydrogen react with one mole of oxygen to make two moles of water.” All balanced chemical reactions are balanced in terms of moles.
Example 8
Interpret this balanced chemical equation in terms of moles.
P4 + 5 O2 → P4O10
Solution
The coefficients represent the number of moles that react, not just molecules. We would speak of this equation as “one mole of molecular phosphorus reacts with five moles of elemental oxygen to make one mole of tetraphosphorus decoxide.”
Test Yourself
Interpret this balanced chemical equation in terms of moles.
N2 + 3 H2 → 2 NH3
Answer
One mole of elemental nitrogen reacts with three moles of elemental hydrogen to produce two moles of ammonia.
help me with these questions
Answer:can’t read it it’s blurry more clear picture
Explanation:
The following equation represents the combustion of
propane in excess oxygen.
C³h⁸ + 5O²----> 3CO² + 4H²O
What is the volume of carbon dioxide gas produced
when 48 cm of propane is completely burnt
a.28 cm³
b.48 cm³
c.96 cm³
d.144cm³
Answer:
i don't know the answer now please sorry for the day before the end of the following is Open you have a good time with the button in the top right of
Answer:
3*0.35L = 1.05L
Explanation:
For part A, we need the ratio of moles of propane to moles of oxygen to get the volume of oxygen required.
The equation tells us there are 5 moles of oxygen gas required to combust 1 mole of propane.
So the required volume of oxygen is 5*0.35L = 1.75L
The equation also tells us that 3 moles of carbon dioxide are produced from the combustion of one mole of propane.
Therefore the produced volume of carbon dioxide is 3*0.35L = 1.05L
6. How many planets are in the solar system?
Answer:
8
Explanation:
Rocky planets:
Mercury
Venus
Earth (We are here)
Mars
Gas giants:
Jupiter
Saturn
Uranus
Neptune
Hi!there are 8 planets in the solar system they are=
MercuryVenusEarthMarsSaturnJupiterUranusNeptune(there was one more planet Pluto but in 2006 scientists said that Pluto was not a planet but a drawf planet)
According to the graph, what is the volume of the gas when the pressure is 150 kPa?
Answer:
Option (2)
Explanation:
Boyle's states that at constant temperature, volume of a gas is inversely proportional to the pressure exerted by the gas.
In other words, at constant temperature, multiplication of pressure and volume of the gas is constant.
PV = k
Here 'k' = constant
From the graph attached,
[tex](V_3,P_3)[/tex] represents (0.5, 200).
0.5 × 200 = k
k = 100
For pressure 'P' = 150 kPa
150 × V = 100
V = [tex]\frac{100}{150}[/tex]
V = 0.67 L
Option (2) is the answer.
Answer:
2 is the right answer so be it
what are salt properties of matter?
Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Answer:
Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Explanation:
give the first answer brainliest, im just fixing thier spelling
what do scientists use to deterimine the temperature of a star
Hammerhead sharks have weakly-muscled gills and must be in constant motion in the ocean in order to maintain a steady flow of water over their gills. The steady flow of water across their gills is necessary for –
attracting mates.
staying warm.
attacking prey.
obtaining oxygen.
What is the ratio of oxygen to carbon dioxide? 2 C2H6+7 O2=6 H2O+4CO2
Answer:
7:4
Explanation:
The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.
What other weapons do sea stars have ?
.
How many moles are there in 8.5 x 1024 molecules of sodium sulfate, Na2SO4?
Answer: To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:
So, 8,50 * 10²⁴ molecules of Na₂SO₃ represent 14,12 moles of Na₂SO₃
Explanation:
The number of moles is equal to 14.1 moles in 8.5 × 10²⁴ molecules of Na₂SO₄.
What is Avogadro's number?Avogadro’s number can be demonstrated as the number of particles in one mole of any substance. Generally, these units can be ions, molecules, atoms, electrons, or protons, depending upon the reaction or reactant and product.
The value of Avogadro’s constant is calculated approximately equal to 6.022 × 10²³ per mole. This number was named after the name of scientist Amedeo Avogadro.
Given, the molecules of the sodium sulfate = 8.5 × 10²⁴
One mole of sodium sulfate (Na₂SO₄) has molecules = 6.022 × 10²³
So, 6.022 × 10²³ molecules of sodium sulfate = 1 mole
8.5 × 10²⁴molecules of Na₂SO₄ has moles =8.5 × 10²⁴/6.022 × 10²³
The number of moles of sodium sulfate = 14.2 mol
Therefore, 14.1 moles of sodium sulfate in 8.50 × 10²⁴ molecules of Na₂SO₄.
Learn more about Avogadro's number, here:
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What would the molarity of a solution be if you took 10 mL of a 13 m stock solution and made it 300 mL solution
Answer:
0.43 M
Explanation:
Use the dilution equation: M1V1 = M2V2
M1 = 13 M
V1 = 10 mL
M2 = ?
V2 = 300 mL
Solve for M2 --> M2 = M1V1/V2
M2 = (13 M)(10 mL) / (300 mL) = 0.43 M
What phase change occurs when a solid changes into a gas?
Answer:
Sublimation
Explanation:
Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.
Why is the cellulose part of human diet
Answer:
Cellulose stimulates the work of intestines and increases their discharge.
Explanation:
Cellulose is a polysaccharide made of glucose polymers, which build plant fibers. Because of this, the plants possess their firmness.
Humans do not digest cellulose because they do not possess certain enzymes, but it is useful for their digestion because it stimulates the work of the intestines.
Cellulose enhances intestinal peristalsis. Peristalsis is series of contractions that allow the progressive movement of food through the digestive tract.
Explain in your own words what biodiversity is.
Answer:
Biodiversity: Bio meaning life and diversity meaning variety. This word refers to the different variations of life that can be found on Earth (plants, animals, micro-organisms, fungi).
Explanation:
Why is the population so low in northern and western China? *
10 pc
There is an abundance of rainfall in this area.
There are too many resources for people to choose from.
There is very little rainfall and the temperatures can be extreme.
O The land is too fertile for people to grow crops.
what ca maior floadina in sreba nasrtha Vantaa
Hurry help
Answer:
it's a combination of the fact that Chinese culture rose out of two of its major rivers,yellow and yangzi. these rivers provide fertile soils conducive to farming .
Explanation:
later on , near the turn of 19th century population migrated to the coastal cities
Answer
the land is too fertile for people to grow crops
Explanation:
...
Which element is the first element in group 13 of the periodic table of elements?
Answer:
Boron
Explanation:
Answer:
Boron
Explanation:
Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.
The volume of Mars is more than three times as large as Mercury's.
Answer:
Ye,,it is true that Mars is bigger than mercury.
Explanation:
Actually,Mercury is the smallest planet in the solar system.
science question. Can you also tell me what weight has to do with the acceleration?
Pls, Answer ASAP!!!! I have to turn in my HW in 20 mins!!
In the rocket fuel formulation for NASA, 325 grams of solid aluminum (Al) particles are heated with 211 grams of solid iron III oxide (Fe2O3). Show all work and units. Include significant figures in your final answer.
a) Write the balanced equation
b) Calculate the mass of iron produced from the reaction
c) Identify the limiting reagent
d) Determine the amount of excess reactant leftover
Show all work and units. Include significant figures in your final answer.
Answer:
B. Calculate the mass of iron produced from the reaction
Explanation:
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How is an endothermic reaction identified?
Answer: It requires heat as a reactant.
describe the Solvay process
Organisms breakdown _____ in order to produce____?
Answer: Organisms breakdown __into smaller particles___ in order to produce__new compounds__?
Explanation:
branliest pls :)
What is the percent by mass of iron in FeCl 3 ?
Answer:
34.429%
Explanation:
_C2H6O + _O2 ---> _CO2 + _H2O
A) 1, 2, 3, 3
B) 1, 2, 1, 2
C) 1, 3, 2, 3
D) 1, 2, 3, 2
What is the pH of a solution whose pOH is 11.09?
a
2.91
b
-11.09
c
15.09
d
25.09
Answer:
A) 2.91
Explanation:
pOH + pH = 14
pH = 14 - 11.09 = 2.91
The pH of an aqueous solution is 14 - pOH. Therefore, the pH of the solution with a pOH of 11.09 is 2.91. Hence, option a is correct.
What is pH ?pH is a measure of how acidic or basic (alkaline) a solution is. It is a scale ranging from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most basic.
The pH scale is based on the concentration of hydrogen ions (H+) in a solution. A solution with a high concentration of hydrogen ions is considered acidic, while a solution with a low concentration of hydrogen ions is considered basic.
Neutral solutions, such as pure water, have an equal concentration of hydrogen ions and hydroxide ions.
pH of aqueous solutions = 14 - pOH
Given, pOH = 11.09
then, pH = 14 - 11.09 = 2.91
Hence, option a is correct.
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