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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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.
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.
How is an endothermic reaction identified?
Answer: It requires heat as a reactant.
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
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
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.
During a lab activity students were given samples of four different unknown elements. The students record their observations as shown in the table
Answer:
It is Sample 3, so C
Explanation:
This is because most metals would be solid but this is probualy mercury and it has a pretty low boiling point, and all the other samples are either weak/break easily with a hammer which metals dont do that, and theres a gas, obviously not so if you use process of elimation and common sense, its C
science question. Can you also tell me what weight has to do with the acceleration?
Pls help i have no clue what the right answers are
What is the percent by mass of iron in FeCl 3 ?
Answer:
34.429%
Explanation:
What period is promethium (Pm) in?
Answer:
6
Explanation:
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.
Can someone help its confusing
Answer:
It's a metaphor. It's comparing Jordan and their emotions to a tornado
what happens to the earth's oceans because of #8
describe the Solvay process
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.
_C2H6O + _O2 ---> _CO2 + _H2O
A) 1, 2, 3, 3
B) 1, 2, 1, 2
C) 1, 3, 2, 3
D) 1, 2, 3, 2
Which of the following is an
example of cohesion?
Answer:
Explanation:
A company that is concerned about the environment wants to encourage the use of their fuel cell cars, so they are putting
together information to help sell the cars. They want to be sure their material is accurate. Which piece of information is
true about fuel cell cars?
O Fuel cell cars are cheaper to buy. Fuel cell cars reduce use of non-renewable fossil fuels
Fuel cell cars are more powerful than gasoline-powered vehicles.
Fuel cell cars allow for the safe storage of hydrogen gas at filling stations.
Answer:
B. Fuel cell cars reduce use of non-renewable fossil fuels
Explanation:
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:
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
Organisms breakdown _____ in order to produce____?
Answer: Organisms breakdown __into smaller particles___ in order to produce__new compounds__?
Explanation:
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What other weapons do sea stars have ?
what do scientists use to deterimine the temperature of a star
Frankie earns $5 each time he babysits his little sister. He has saved $30. Frankie wants to save $52 to buy a new skateboard. How many more times will Frankie need to babysit to have enough money to buy the skateboard?
Answer:
52- the 30 he has already = $22
22/5= 4.4
he will have to babysit 5 times
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:
...
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:
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.
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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