Answer:
2.4×1024 atoms.
Explanation:
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What is the problem with this chemical equation: H2 + O2 → H2O
Answer:
To make H2O, you need two H and one O. in this equation, you are given two Os which is too many. you'll end up with an extra O. H2 + O2 -> H2O + O
Pls answer rn due tmr pls pls fast
Answer:
From bottom to top, Troposphere, Stratosphere, Mesosphere, Thermosphere, & at the top, Exosphere.
Explanation:
When the equation for the reaction represented below is balanced and all coefficients are reduced to lowest whole-number terms, the coefficient for Al(s) is __ Al(s) + __ O2(g) __ Al2O3(s)
This question is asking for the correct balanced reaction, when solid aluminum reacts with gaseous oxygen to form solid aluminum oxide, according to the law of conservation of mass, which demands us to have the same number of atoms of each element on both sides of the equation.
In such a way, we can start by knowing there is one aluminum atom on the left and two on the right whereas there are two oxygen atoms on the left and three on the right side of the equation.
The aforementioned means we must balance oxygen first by putting a 2 on aluminum oxide and a 3 on oxygen in order to cross multiply and obtain six oxygen atoms on both sides of the equation.
Moreover, the 2 on the aluminum oxide makes four aluminum atoms on the right, which means we must put a 4 on the left-handed aluminum in order to get the correct balance, and therefore, write the following balanced equation:
4Al(s) + 3O₂(g) ⇒ 2Al₂O₃(s)
Hence, the coefficient for Al, as asked, is 4.
Learn more:
https://brainly.com/question/11322377 https://brainly.com/question/7181548Does pure water conduct electricity? If not, what can we do to make it conduct electricity?.
Why does a solid fill only part of a closed jar while the same mass of a gas fills the whole jar?
Answer:
because of atom don't put that as an answer
Explanation:
i need point to do finals
The different behavior of particles in solids and gases, including the intermolecular forces and kinetic energy, leads to solids filling only part of a closed jar while the same mass of a gas fills the whole jar. A solid fills only part of a closed jar, while the same mass of a gas fills the whole jar due to the differences in the behavior of particles in each state of matter.
1. Solid: In a solid, the particles are tightly packed and held in a fixed position. They have a definite shape and volume. The intermolecular forces between the particles are strong, preventing them from moving freely. As a result, solids occupy a specific amount of space within a container.
2. Gas: In a gas, the particles are spread out and move freely. They have no definite shape or volume. The intermolecular forces between the particles are weak, allowing them to move and fill the available space. As a result, gases can expand to fill the entire volume of a container.
When the same mass of a gas and a solid are placed in a closed jar, the gas particles have higher kinetic energy and are more mobile. They collide with each other and the walls of the container, exerting pressure and spreading out to occupy the entire space. Since the intermolecular forces are weak, the gas particles are not constrained by a fixed arrangement.
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which compound contains both ionic and covalent bonds
Answer:
Any compound that contains a metal ion and a polyatomic ion would work. Polyatomic ions are covalently bonded non-metals that have some overall charge. Examples of common polyatomic ions include OH⁻ (hydroxide), NH₄⁺ (ammonium), and NO₃⁻ (nitrate). So answers to this question can be something like KOH (potassium hydroxide), but really, anything works if it contains a metal ion and a polyatomic ion.
Which of these substances are greenhouse gases? Check all that apply. Oxygen carbon dioxide helium methane nitrous oxide.
The greenhouse gases are carbon dioxide, methane, and nitrous oxide.
The greenhouse effect has been defined as the entrapment of the sun's energy by the gases that result in the earth becoming warmer and a better place to live.
The gases present in the atmosphere that has been able to entrap the heat energy has been termed the greenhouse gases.
The greenhouse gases have been carbon dioxide, methane, and nitrous oxide.
For more information about greenhouse gases, refer to the link:
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Answer:
carbon dioxide, nitrous oxide, methane
Explanation:
which of the following describes how ice could have once covered warm places such as australia and india
Answer:
U shaped vallies?
Explanation:
(i dont know if this was one of the options)
23. An organism develops active immunity as a result of
A) manufacturing its own antigens
B) producing antibodies in response to a
vaccination
C) receiving an injection of antibodies produced
by another organism
D) receiving an injection of a dilute glucose
solution
a
Answer:
B is correct.
Explanation:
A vaccination will trigger the organism to prepare antibodies as a measure of protection against a sickness.
a ___ wave is a disturbance in matter that transfers energy through the matter.
Answer:
Mechanical Waves
9. Name the element which has the following numbers of particles:
I
A. iron
B. iodine
C. Helium
D. calcium
E. lead
F. hydrogen
check your periodic table to see if they are correct
atomic number, proton number and electron are the same
to find neutron = mass number - atomic number
what is the formula of trinitrogen tetrabromide
The formula of trinitrogen tetrabromide is N3Br4
How to determine the molecular formulaTrinitrogen features three molecules of nitrogen, N3
Tetrabromide features four molecules of bromide = Br4
Thus, the formula of trinitrogen tetrabromide is N3Br4
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The work you do on a machine is called the_________________
Answer:
THE WORK YOU DO ON A MACHINE IS CALLED WORK INPUT
Which of these would describe a dish that contains bits of chocolate and nuts you can see?
homogeneous mixture
compound
heterogeneous mixture
none of the above
Answer:
mezcla homogénea
Answer:
heterogeneous mixture
Explanation:
you can split the mixture easily with you hands while homogeneous mixtures is dissolved
what are subatomic particles?
Explanation:
a particle smaller than an atom (e.g., a neutron) or a cluster of such particles (e.g., an alpha particle).
The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy, is nuclear ______ Fusion Fission Radiation Energy.
Answer:
B. Fission
Explanation:
On edge
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Answer:
use other websites u might have luck and find ur anwer
Explanation:
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1. Have scientists been able to invent a perpetual motion machine?
O Yes
O No
Question 13 (2 points)
Given the following images, choose the one that most likely represents an M-class star. (2 points)
A
B
с
D
Оа
A
Oь в
Ос
О с с
Od D
Answer:
b. because its Rigel star
Explanation:
hope itsattachments
HELP ME PLEASE HURRY
The characteristics of two different types of reactions are shown below:
Reaction A: Electrons are gained by the atoms of an element.
Reaction B: Protons are lost by the atom of an element.
Which statement is true about the atoms of the elements that participate in the two reactions?
Their identity changes in both Reaction A and Reaction B.
Their identity changes in Reaction A but not in Reaction B.
Their identity changes in Reaction B but not in Reaction A.
Their identity remains the same in both Reaction A and Reaction B.
Answer:
D is correct
Explanation:
Answer:
A
Explanation:
Electrons are gained by the atoms. There is no change in the nucleus of the atom and the number of protons remains identical.
Why were your results for the Southern Hemisphere opposite of what you found for
the Northern Hemisphere?
After the first four games of a professional football season, three players scored a total of 80 touchdowns. Duke Johnson scored 14 of the touchdowns. Josh McCown scored 40% of the touchdowns. Andre Roberts scored the remaining touchdowns. How many touchdowns did Andre Roberts score?.
The number of touchdowns scored by Andre Roberts = 34 touchdowns
Given data :
Total number of touchdowns = 80
Number of players = 3
Determine the number of touchdowns scored by Andre RobertsPlayer 1 ( Duke Johnson ) scored = 14
Player 2 ( Josh McCown ) scored = 40% of 80 = 32
∴ number of touchdowns scored by player 3 ( Andre )
= 80 - ( 14 + 32 )
= 80 - 46 = 34 touchdowns
Hence we can conclude that the number of touchdowns scored by Andre is 34 .
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predict the product 1-bromo propane is treated with sodium metal
When 1-bromo propane is reacted with sodium metal, the propane and sodium bromide are formed.
Propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal. The Bromine which is present in the 2-bromopropane is removed through hydrogenation and combines with the sodium metal which results in the production of propane and sodium bromide.So we can conclude that propane and sodium bromide are produced when the 1-bromo propane is reacted with sodium metal.Learn more about 1-bromo propane here: https://brainly.com/question/25597694
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9
Ammonia is manufactured from nitrogen and hydrogen by the Haber process.
N2(g) + 3H2(g)2NH3(g)
What is the percentage yield when 60 kg of ammonia is produced from 60 kg of hydrogen?
A
5.9%
B
17.6%
с
35.3%
D
50.0%
Answer:
B
17.6%
Explanation:
1. Percentage yield = (Actual yield/theoretical yield) x 100
2. You know actual yield of ammonia (60kg) so you need to work out theoretical yield.
3. mols of hydrogen = m/mr = 60,000/2 = 30,000 mols.
4. 3:2 ratio so (30,000/3) x 2 = 20,000 mols of Ammonia.
5. Therefore mass of ammonia = mr x mols = 20,000 x 17 = 340,000 grams
6. So percentage yield is (60,000/340,000) x 100 = 17.6
The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below. 3H2 N2 Right arrow. 2NH3 The molar mass of NH3 is 17. 03 g/mol. The molar mass of H2 is 2. 0158 g/mol. In a particular reaction, 0. 575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures? 0. 1 0. 102 0. 10209 0. 1021.
Answer:
B
Explanation:
We are given that ammonia can be produced from hydrogen gas and nitrogen gas according to the equation:
[tex]\displaystyle 3\text{H$_2$} + \text{N$_2$} \longrightarrow 2\text{NH$_3$}[/tex]
We want to determine the mass of hydrogen gas that must have reacted if 0.575 g of NH₃ was produced.
To do so, we can convert from grams of NH₃ to moles of NH₃, moles of NH₃ to moles of H₂, and moles of H₂ to grams of H₂.
We are given that the molar masses of NH₃ and H₂ are 17.03 g/mol and 2.0158 g/mol, respectively.
From the equation, we can see that two moles of NH₃ is produced from every three moles of H₂.
With the initial value, perform dimensional analysis:
[tex]\displaystyle \begin{aligned} 0.575\text{ g NH$_3$}& \cdot \frac{1\text{ mol NH$_3$}}{17.03\text{ g NH$_3$}} \cdot\frac{3\text{ mol H$_2$}}{2\text{ mol NH$_3$}} \cdot \frac{2.0158\text{ g H$_2$}}{1\text{ mol H$_2$}} \\ \\ & = 0.102\text{ g H$_2$}\end{aligned}[/tex]
*Assuming 100% efficiency.
Our final answer should have three significant figures. (The first term has three, the second term has four (the one is exact), the third term is exact, and the fourth term has five. Hence, the product should have only three.)
In conclusion, our answer is B.
can somebody please help me here ? i wanna make sure of my answer..
Answer:
[Unfortunately] Answer is A
Explanation:
You should know that 'liquid' is a state of matter and aqueous means that there is water present.
-It is mentioned that barium chloride is a solution. So you can cut off the C option.
-Barium sulfate is a salt which means it's a solid, so you can cut off the D option.
We now have A and B as the only options remaining.
-Dilute sulfuric acid is definitely not a liquid because water is present. (dilute indicates that there is a greater proportion of water)
The answer should be A.
which particle diagram shown above best represents the strongest intermolecular force between two ethanol, c2h6o, molecules?
The strongest intermolecular bonding in ethanol is hydrogen bonding.
Intermolecular forces are the forces that hold two molecules of a substance together in a given state of matter. For ethanol, the strongest intermolecular force is hydrogen bonding.
Hydrogen bonding occurs when hydrogen is directly linked to a highly electronegative element such as oxygen, nitrogen, fluorine or sulfur. The existence of intermolecular hydrogen bonds accounts for unusual properties such as abnormally high melting and boiling points.
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Copper can be also be made by reacting copper oxide with methane
as shown below.
4CuO + CH4 + 4Cu + 2H2O + CO2
How many moles of copper would be made if:
a) 2 moles of copper oxide were reacted with 2 moles of methane?
b) 2 moles of copper oxide were reacted with 1 mole of methane?
c) 10 moles of copper oxide were reacted with 2 moles of methane?
Answer:
a
Explanation:
Choose one metal from the reactivity series that will react safely with dilute sulphuric acid
Please can someone answer quickly
Answer:
Zinc (Zn) will safely react with dilute sulphuric acid.
Explanation:
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If two atoms have very different electronegativities, will this for me ionic bond or a covalent bond
Answer:
It will be a covalent bond.
Explanation:
When two atoms combine, the difference between their electronegativities is an indication of the type of bond that will form. If the difference between the electronegativities of the two atoms is small, neither atom can take the shared electrons completely away from the other atom and the bond will be covalent.