Answer:
The answer would be 4.5 moles of O2
How many grams of h20 is formed by mixing solutions containing 90.0 mol CuO and 18.01 mol NH3
Answer:
Explanation:
Please help its also urgent ( I have 8 more questions)
Answer:
I might be wrong but I'm pretty sure its B) Robin
Explanation:
Bc it says which animal gets its shelter by interacting with a living part of the environment and a robin is interacting with a tree branch and its a living part of the environment.
AGAIN SO SRRY IF ITS WRONG
I need help with this please
Answer:
really?!
Explanation:
this is a test your suppose to answer it
According to Avogadro's law, how will the number of molecules in 2 liters
of hydrogen gas compare with the number of molecules in 2 liters of
oxygen gas at the same temperature and pressure?
According to Avogadro's law, the two gases will have equal number of molecules.
Avogadro's lawFrom the question, we are to determine how the two gases would compare according to Avogadro's law
First, we will state the Avogadro's law
Avogadro's law states that "equal volume of all gases at the same temperature and pressure contain the same number of molecules"
Now, from the given information
We have 2 liters of hydrogen gas and 2 liters of oxygen gas at the same temperature and pressure
According to Avogadro's law, gases that are equal in volume and are at the same temperature and pressure will have equal number of molecules.
Hence, according to Avogadro's law, the two gases will have equal number of molecules.
Learn more on Avogadro's law here: https://brainly.com/question/26174006
If a certain species is found to have DNA composed of 17% cytosine, what would be the percentages of the other three bases?
Adenine = %
Thymine = %
Guanine = %
Enter only a number/numeral in each provided box.
Answer:
Adenine=33%
Thymine=33%
Guanine=17%
Explanation:
the base pairs percentages must be the same
The element chlorine has atomic no.17 and atomic mass 35. Calculate the no. of protons, neutrons and electrons.
Answer:
Protons = 17 Neutrons = 18 Electrons = 17
Explanation:
The number of protons and electrons are the the same number as the atomic number.
To get the number of neutrons, subtract the number of protons from the mass number.
35-17=18
Answer:
Protons: 17
Neutrons: 18
Electrons: 17
Explanation:
To find the number of protons, you simply have to find the atomic number of the element.
To find the number of protons you have to subtract the atomic number from the atomic mass
To find electrons to add or subtract the charge that the element has. (In this case, it has no charge)
At what temperature will 0.371 moles of neon gas occupy 10.30L at 2.50 atm?
Answer:
T=846K
Explanation:
We can use the formula for the Ideal Gas Equation, which is
[tex]PV=nRT[/tex]
P=pressure
V=volume
n=mols of gas
R=constant (0.08201 L-atm/mol-K)
T=temperature
We will have to rearrange to equation to find temperature, which is
[tex]T=\frac{PV}{nR}[/tex]
Time to solve:
[tex]T=\frac{(2.50 atm)(10.30L)}{(0.371 mols)(0.08206 L-atm/mol-K)}[/tex]
[tex]T=846 K[/tex]
If you want to convert to Celsius, subtract 273 to your answer, which will get you 573ºC.
Light travels faster in air than in water
Answer:
.
Explanation:
What is the Lewis Structure for CO2-
Carbon dioxide (CO2) lewis structure has two oxygen atoms and one carbon atom. There are two double bonds around carbon atom in the CO2. No lone pairs on carbon atom and each oxygen atom has two lone pairs on their valence shells. Shape of CO2 is linear.
What is the distance between each pair of numbers? 0 and a
Answer:
a units
Explanation:
i do rsm and its right
Answer:
a units.
Explanation:
If someone asks, "How many units are between 0 and 3?" you're going to say 3, right?
Deadline homework if someone could this I make u a brainlist. Thanks
Answer:
material a
Explanation:
it is expensive which means it's better quality
it's easy to make so you will be able to make lots and then make more money to buy more material
In 100 mL of cold water, 35 g of NaCl will dissolve, but 70 g will not. This observation implies that
The observation implies that the solubility of a solution depends on both the amount of solute and the volume of solvent.
SolubilityThe solubility of a substance is the property of that substance to dissolve in a solvent.
The solubility of a solution is the ability of the solution to dissolve solutes.
Solubility depends on the quantity of solutes and solvents.
Thus, 100 mL water may be able to dissolve 35 g NaCl but not 70 g because the maximum solubility of the water is breached. In order to dissolve more NaCl, the volume of the water might need to be increased.
More on solubility can be found here: https://brainly.com/question/22185953
What percentage of carbon is in baking soda?
Answer:
14.297%
Explanation:
Answer:
14.297%
Explanation:
this is the percentage
Pls help (really easy i just cant do it)
Write a brief narrative (no longer than a paragraph) that describes your trip through the phases of matter. Pretend you are the raindrop. Tell me what happens to you as you change from one phase to another
If you have your notes of the steps: like precipitation etc.. it should help you form a step by step phase change in raindrops.
Answer:
As a raindrop I would be in a body of water as a liquid. Slowly, the sun would heat me up until I evaporate. I would rise into the air as a gas and form a cloud as condensation. Then precipitation would occur. The temperature suddenly drops dramatically. I freeze and fall as a solid of ice.
I don't know if this is what you were looking for but I hope it helps.
why do vehicle engines produce nitrogen oxides
Answer:
When fuels are burned in vehicle engines, high temperatures are reached. At these high temperatures, nitrogen and oxygen from the air combine to produce nitrogen monoxide. When this nitrogen monoxide is released from vehicle exhaust systems, it combines with oxygen in the air to form nitrogen dioxide.
Explanation:
please mark me as brainlist pleaseExplanation:
Nitrogen and oxygen from the air combine at high temperatures in the engine to produce nitrogen (II) oxide by the reaction :
N2(g) + O2(g) → 2NO(g).
Nitric oxides rise in the atmosphere and are oxidized to nitrogen dioxide, NO2 which dissolves in the precipitating water to form acid rain.
Which statement about water is not correct?
A A water molecule consists of three atoms covalently bonded together.
B The water supply is treated with chlorine to kill the bacteria in it.
C Water changes the colour of cobalt chloride paper from blue to pink.
D Water has a low melting point because covalent bonds are weak.
A liter of milk has a [H] of about 2.51 x 10-7. (You may prefer to think of the hydronium ion concentration, [H3O+], as 2.51 x 10-7.) Use the formula for the calculation of pH provided and show each step as you calculate the pH of milk. In order to get full points you must show all the steps you take
Please help!!.
Answer:
12-6
Explanation:
At a certain temperature and pressure, chlorine (cl2) molecules have an average velocity of 0. 0380 m/s. What is the average velocity of sulfur dioxide (so2) molecules under the same conditions?
[tex]\longrightarrow[/tex]From the kinetic molecular theory of gases, the average speed of gas molecules at a specific temperature and pressure is given by :-
[tex]\green{ \underline { \boxed{ \sf{v_{avg} = \frac{8RT}{\pi M}}}}}[/tex]
where
R = 8.314 J/mol, the universal gas constant T is the absolute temperature of the gas M is the molar mass of the gas.[tex]\longrightarrow[/tex]For two different gases A and B at the same temperature, it can be shown that the average speeds are inversely proportional to the square root of their molecular masses-
[tex]\green{ \underline { \boxed{ \sf{ \frac{v_{avg} ^A}{v_{avg}^B} = \sqrt{\frac{M_A}{M_B}}}}}}[/tex]
Given:-[tex]\sf average \:velocity \:of \:Cl_2,v_{avg} ^B= 0.0380 \:m/s [/tex]
Now,
[tex]\sf Molar \:mass \:of \:Cl_2 = 2\times atomic \:mass \:of \:Cl[/tex]
[tex]\implies[/tex][tex]\sf Molar \:mass \: of \:Cl_2 = 2\times 35.5[/tex]
[tex]\implies[/tex][tex]\sf Molar \:mass \:of \: Cl_2 = 71 \:g[/tex]
similarly,
[tex]\begin{gathered}\\\implies\quad \sf Molar \: mass \:of \: SO_2 = atomic \:mass \:of \:S +2\times \: atomic \: mass \: of \: O \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 32 +2\times 16 \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 32 +32 \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 64 \\\end{gathered} [/tex]
Putting Values in formula to get average velocity -
[tex]\begin{gathered}\\\implies\quad \sf { \frac{v_{avg} ^{SO_2}}{v_{avg}^{Cl_2}} = \sqrt{\frac{M_{SO_2}}{M_{Cl_2}}}}\\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf { \frac{v_{avg} ^{SO_2}}{0.0380} = \sqrt{\frac{71}{64}}}\\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf \frac{v_{avg} ^{SO_2}}{0.0380} = 1.05 \: \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf v_{avg} ^{SO_2}= 1.05 \times 0.038 \: \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf v_{avg} ^{SO_2} = 0.4 \: m/s\: \\\end{gathered} [/tex]
[tex]\longrightarrow[/tex]Thus the average velocity of sulphur dioxide molecules under the same conditions is 0.4 m/s
Agas with a volume of 250 mL has 16.0 moles. If the amount of moles is reduced to
12.0, what is the new volume?
The new volume is mathematically given as
V=93.75ml
What is the new volume?
Question Parameters:
A gas with a volume of 250 mL has 16.0 moles
the number of moles is reduced to 12.0
Generally, the equation for the gas laws is mathematically given as
V1/n1 = V2/n2
Therefore
250/16 = V2/12
v=375/4
V=93.75ml
In conclusion, the new volume of gas is
V=93.75ml
Read more about volume
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Is a solution in which [H+] = 1.0 × 10-5M acidic, basic, or neutral?
We need pH
[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]
[tex]\\ \rm\Rrightarrow pH=-log10^{-5}[/tex]
[tex]\\ \rm\Rrightarrow pH=5[/tex]
Acidic
Considering the definition of pH, the pH is lower than 7, so the solution is basic.
What is pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
The numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
This caseIn this case,[H⁺]= 1×10⁻⁵ M.
Replacing in the definition of pH:
pH= - log (1×10⁻⁵ M)
Solving:
pH= 5
Finally, the pH is lower than 7, so the solution is basic.
Learn more about pH:
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#SPJ6
Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments?
DNA that was not contained within a live cell caused the death of the host organism.
DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics.
The two strains of Streptococcus were visually indistinguishable.
Heat treatment of the Streptococcus strains destroyed the DNA molecules.
Answer:
DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics
I hope this helps you
:)
Which statement is correct about the rocks at this location?
A. All three types of rock will become metamorphic if they stay at the surface of Earth.
B. If this location is buried deep underground, only the metamorphic rock will melt because it has already been heated before.
C. The metamorphic rock and sedimentary rock were already at this location and magma flowed into the other rocks.
D. The igneous rock will become metamorphic rock after the rock in the cliff side turns into sediment.
Answer:
i also need like your question
Explanation:
Which statement is correct about the rocks at this location?
A. All three types of rock will become metamorphic if they stay at the surface of Earth.
B. If this location is buried deep underground, only the metamorphic rock will melt because it has already been heated before.
C. The metamorphic rock and sedimentary rock were already at this location and magma flowed into the other rocks.
D. The igneous rock will become metamorphic rock after the rock in the cliff side turns into sediment.
Is obsidian a rock? Does it contain minerals? Help please!!
Answer:
Yes It Is A Rock
Explanation:
It Is Not A True Mineral
How does mechanical advantage help in doing work?
Answer:
Mechanical advantages allows humans to perform tasks much easier in terms of the force they need to apply, but must always obey the conservation of energy. Mechanical advantage is a measure of the ratio of output force to input force in a system, used to analyze the forces in simple machines like levers and pulleys.A good example is pushing a heavy object up a ramp. It may be easier to push the object up a ramp instead of just lifting it up to the right height, but it takes a longer distance.Explanation:
Hope it helps you!!For an atom to be neutral, it must have the same number of electrons as what other particle
A. Protons
B. Atomic mass
C. Neutrons
D. Photons
Answer:
A. Protons
Explanation:
For an atom to be neutral, it must have the same number of electrons as protons. Since protons are positive and electrons are negative, that will result in a neutrally charged atom.
hope this helps!! p.s. i really need brainliest :)
does anyone know the three answers Question 1 which element is in group 5 period 2?, question 3 which element is in group 6 period 2?, question 4 which element is in group 8 period 1? this IPC it is both Integrated Physics and Chemistry
Explanation:
1. Nitrogen
3. Oxygen
4. Helium
look into the periodic system
question 1: nitrogen
question 3: oxygen
question 4: helium
What makes 3Ag2S+2Al->Al2S3+6Ag(s) oxidized and reduced
(1)
(c) A teacher puts hot sodium into a gas jar of chlorine.
The changes seen before, during and after this reaction were observed.
Complete the sentences.
Choose the answers from the box.
colourless
green
lilac
silver
white
yellowlorange
Sodium is a
solid.
Chlorine is a
gas.
The hot sodium burns with a
flame.
The product sodium chloride is a
solid.
(4)
Answer:
(1)
(c) A teacher puts hot sodium into a gas jar of chlorine.
The changes seen before, during and after this reaction were observed.
Complete the sentences.
Choose the answers from the box.
colourless
green
lilac
silver
white
yellowlorange
Sodium is a
solid.
Chlorine is a
gas.
The hot sodium burns with a
flame.
The product sodium chloride is a
solid.
1. slivery-white
2. yellow
3. lilac
4. colourless
Explanation:
Which aspect does a light year measure?
O distance
O speed
O curvature of space
O time
A light-year is the distance a beam of light travels in a single Earth year. so it is A distance
Give me brainliest
2 Which of these ions will move to the positive electrode and which
will move to the negative electrode in a circuit like the one shown
in Figure 2?
lithium ions chloride ions bromide ions
calcium ions sodium ions zinc ions
oxide ions
iodide ions barium ions (4 marks)
Answer:
lithium ion ,zinc ion and iodine ion will move to negative electrode while bromide,chloride and barium ion will move to positive electrode