Answer:
5.55 moles
Explanation:
what do scientists use to deterimine the temperature of a star
Organisms breakdown _____ in order to produce____?
Answer: Organisms breakdown __into smaller particles___ in order to produce__new compounds__?
Explanation:
branliest pls :)
How do heatwaves show physical and chemical changes
Answer:
An example of heatwaves showing physical and chemical change is with a burning candle, when a candle burns, there is both a physical and chemical reaction.
The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle gets smaller and smaller. This wax, as can be seen, will drip onto the candle and stick to it. When this wax forms back into a solid and stays on the candle, that is another physical change that can occur.
The chemical reaction can be a little less obvious. The first is that the heat produced by the candle consumes both the oxygen around it, as well as the fuels coming from the flame. This will then lead to carbon dioxide emissions produced by the flame, which by the way should never be inhaled. This is the chemical change that takes place in the reaction.
2 spaceships are in deep space. The distance between the centers of mass of the two spaceships is 300 m, and the force between them is 5.51×10^-7N. If one spaceship has a mass of 24,000 kg, what is the mass of the other spaceship?
Answer:
Mass of the second spaceship is 3.10 × 10⁴ kg 0r 31000 kg
Explanation:
From Newton's law of universal gravitation, the force of attraction , F, between two bodies is directly proportional to the product of their masses and inversely proportional to the square root of the distance between them.
F = Gm₁m₂/d²
m₁ = 24000 kg
m₂ = ?
d = 300 m
F = 5.51 × 10⁻⁷ N
Gravitational constant, G = 6.67 × 10⁻¹¹ N.m²/kg²
Making m₂ subject of the formula : m₂ = F × d² / G × m₁
m₂ = 5.51 x 10⁻⁷ × 300 × 300 / 6.67 × 10⁻¹¹ × 24000
m₂ = 3.1 × 10⁴ kg
Therefore, Mass of the second spaceship is 31000 kg
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
A balloon takes up 625 L at 0°C. If it is heated to 80°C, what will its new volume be?
Answer:
Me gusta tu corte G
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
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.
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
1. How many atoms are present in 64.0g of Oxygen?
The number of atoms present in 64.0g of Oxygen are 24.092 × 10²³.
What are atoms?
Atoms are the number of molecules that are present in an element. The atoms will be of the same species or different species. Atoms also contain charged particles that constitute the atomic number or atomic mass.
The molar mass of oxygen is 16 grams, which means that 1 mole of oxygen weighs 16 grams.
Therefore, 64-gram oxygen
To calculate the moles, the mass is divided by the molar mass
Putting the value in the formula
64/16 = 4 mole oxygen.
1 mole of any element contains 6.022 x 10²³ atoms in it.
The number of Oxygen atoms in 64 grams of Oxygen gas is
24.088 × 10²³ = 24.092 × 10²³
Thus, the atoms present in 64.0g of Oxygen are 24.092 × 10²³.
To learn more about atoms, refer to the below link:
https://brainly.com/question/21896366
#SPJ2
What other weapons do sea stars have ?
Pls help i have no clue what the right answers are
Select ALL that apply.
What factors affect wave height?
Lesson 2.14
Fetch
Strength of wind
Direction of the wind
Duration of wind
The factors affect wave height is the duration of the wind
Answer:
all answers are correct
Fetch
Strength of wind
Direction of the wind
Duration of wind
Explanation:
i took the quiz hope this helps!
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
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
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:
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.
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
Can someone help its confusing
Answer:
It's a metaphor. It's comparing Jordan and their emotions to a tornado
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.
find the limiting reagent if 0.25 moles of Co2 react with 0.1 moles of KO2
Answer:
KO₂ is limiting reactant
Explanation:
Based on the balanced reaction:
2CO₂ + 4KO₂ → 2K₂CO₃ + 3O₂
2 moles of CO₂ react with 4 moles of KO₂.
Thus, for a complete reacction of 0.25 moles of CO₂ are required:
0.25 moles * (4moles KO₂ / 2moles CO₂) = 0.5 moles of KO₂
As there are just 0.1 moles:
KO₂ is limiting reactantPls, 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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_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:
science question. Can you also tell me what weight has to do with the acceleration?
what happens to the earth's oceans because of #8
What is the percent by mass of iron in FeCl 3 ?
Answer:
34.429%
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.
When ammonium chloride crystals are dissolved in water, the temperature of the water decreases. What does the temperature change indicate about the dissolving of ammonium chloride in water.
Answer:
See Explanation
Explanation:
A decreasing temperature indicates that the dissolution process for the ammonium chloride requires input of energy from surroundings. That is, the process is essentially 2 parts => system (object of interest - NH₄Cl) and the surroundings (everything else - solvent - H₂O). The surroundings (water) solvent is showing a measured decrease in temperature or loss of energy (exothermic to surroundings) which flows into the system (NH₄Cl) and effects dissolution of salt into solution (endothermic to system).