Answer:
When white light falls upon a green surface all of the components of the white light that are not green are absorbed by the surface while the green light is scattered.
Explanation:
Answer:
when a white light hit green color the light starts to scatter but any other light would be absorbed hope this helps
Help me get it right and no links
How many moles of oxygen is required to produce 7.8 moles of water?
Answer:
3.5
Explanation:
The half-life of Co-60 is 5.3 years. If the initial mass of the sample is 1000g, how much will remain after 15.9 years?
Answer:
m_r = 125 g
Explanation:
Formula to calculate the remaining mass is;
m_i = m_r × 2^(t/λ)
Where;
m_i is initial mass of sample
m_r is remaining mass after time t.
t is time
λ is half life.
We are given;
m_i = 1000 g
t = 15.9 years
λ = 5.3 years
Thus;
1000 = m_r × 2^(15.9/5.3)
1000 = 8m_r
m_r = 1000/8
m_r = 125 g
What happens when a liquid becomes a gas?
A. It changes shape and volume
B. It changed volume but not shape
C. It changes shape but not volume
D. Nothing happens
He principal quantum number, n, represents the: a sub level of an electron b main energy level of a proton c main energy level of an electron d sub level of a proton
Answer:
c. main energy level of an electron
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are considered to be the building blocks of matter and as such defines or determines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these includes; protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
The principal quantum number, denoted by n, represents the main or overall energy level of an electron.
Basically, this property of an electron determines its energy level, as well as its distance from the nucleus of an atom of any chemical element. Also, as the distance of each orbital from the nucleus increases, the energy level increases respectively. Thus, sets of orbitals having the same principal quantum number (n) are generally referred to as an electron shell.
Will give brainliest please help!!
Answer:
I think it's B so maybe
How many moles is 45g of KCl?
Answer:
60.36
Explanation:
Answer: 0,60 mol
Explanation:
Molar mass of KCl is M = (39.10 + 35.45) g/mol = 74,55 g/mol
amount of substance n = m/M = 45 g / 74.55 g/mol
Please help and thank you
What does MVLMEN stand for
What is the pH of .038 M HCI?
Answer:
is simple apply formula dude.
Help me get it right and no links
Answer: Natural Resources
Explanation:
A 16 g sample of iron is heated from 0°C to 35°C absorbs 246.4 J of energy as heat what is the specific heat of this piece of iron
Answer: 0.44 j/g degrees Celsius
Explanation: i got the answer right on my test
A gas has a volume of 62.65L at O degrees Celsius and 1 atm. At what temperature in Celsius would the volume of the gas be 78.31 l at a pressure of 612.0 mmHg
Answer:
The volume of the gas will be 78.31 L at 1.7 °C.
Explanation:
We can find the temperature of the gas by the ideal gas law equation:
[tex] PV = nRT [/tex]
Where:
n: is the number of moles
V: is the volume
T: is the temperature
R: is the gas constant = 0.082 L*atm/(K*mol)
From the initial we can find the number of moles:
[tex] n = \frac{P_{1}V_{1}}{RT_{1}} = \frac{1 atm*62.65 L}{(0.082 L*atm/K*mol)*(0 + 273)K} = 2.80 moles [/tex]
Now, we can find the temperature with the final conditions:
[tex] T_{2} = \frac{P_{2}V_{2}}{nR} = \frac{612.0 mmHg*\frac{1 atm}{760 mmHg}*78.31 L}{2.80 moles*0.082 L*atm/(K*mol)} = 274.7 K [/tex]
The temperature in Celsius is:
[tex] T_{2} = 274.7 - 273 = 1.7 ^{\circ} C [/tex]
Therefore, the volume of the gas will be 78.31 L at 1.7 °C.
I hope it helps you!
In triangle ABC,m angle C=90^ , m angle A=54^ , and CA = 10 centimeters . What is the length of overline AB to the nearest centimeter
Answer:
AB = 17 cm
Explanation:
NOTE: This is a mathematics question. Nevertheless, the answer to the question is given below
Please see attached photo for diagram.
The length of AB can be obtained as follow:
Angle A = 54°
Adjacent = 10 cm
Hypothenus = AB =?
Using the Cos ratio, we can simply obtain the length of AB as follow:
Cos A = Adjacent /
Cos 54 = 10 / AB
0.5879 = 10 /AB
Cross multiply
0.5879 × AB = 10
Divide both side by 0.5878
AB = 10 / 0.5878
AB = 17 cm
Can someone help me out please?
Answer:
Mass number is 24 and the element is sodium (Na)
Does anyone know any top brainly users that are good at chemistry?
Answer:
yes
Explanation:
Answer:
These people were ranked best at chemistry
Explanation:
Identify the limiting reactant when 24.5 g of H2 is made to react with 152.5 g of CO using the formula CO (g) +2H2 (g) --> CH3OH
Explanation:
1 mole of Carbon monoxide reacts with 2 moles of. Hydrogen gas ... use the mole ratio to determine the number of ... the coefficients of the balanced equation. 35.0 g Al mol Al. 26.98 g. Al.
type of soil that's not favorable for crop production is the PH range of
Answer:
Though soil pH generally ranges from 1 to 14, the optimum range for most agricultural crops is between 5.5 and 7.5. However, some crops have adapted to thrive at soil pH values outside this optimum range.
Answer:
okkodijhmnchnffc
Explanation:
is it evil to ask answers to questions you already know just so people have to answer it?
Answer:
no it's not if you wanna know different types of answer then you should ask answer of questions you already know about. it increases your knowledge
Copper metal (Cu) reacts with silver nitrate (AgNOg) in aqueous solution to form Ag and Cu(NO3)2. The balanced chemical equation is shown below. Cu+2AgNO3 Cu(NO3)2 + 2Ag The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from a reaction of 31.75 g of Cu? O 26.95 O107.9 O 215.91 431.82
show your work pls
Answer:
107.9
Explanation:
Help please with the 2 questions i will mark you brainliest
Answer:
The first one would be "Both Mixtures and Compounds", while the second one would be "Solution 2 - Because she used more salt".
Explanation:
An element is made up of atoms, but to make a mixture or compound you are combining multiple elements. And when look at the second question, assuming they have the same amount of water, there is a higher ratio of salt in the second one, which would make it more concentrated.
PH CHEM, PLEASE HELP QUICK! NO LINKS/VIRUSES PLEASE!
A solution is created by measuring 3.60 x 10-3 moles of NaOH and 5.95 x 10-4 moles of HCl into a container and then water is added until the final volume is 1.00 L. What is the pH of this solution?
Answer:
The pH of the solution is 11.48.
Explanation:
The reaction between NaOH and HCl is:
NaOH + HCl → H₂O + NaCl
From the reaction of 3.60x10⁻³ moles of NaOH and 5.95x10⁻⁴ moles of HCl we have that all the HCl will react and some of NaOH will be leftover:
[tex] n_{NaOH}} = n_{i_{NaOH}} - n_{HCl} = 3.60 \cdot 10^{-3} moles - 5.95 \cdot 10^{-4} moles = 3.01 \cdot 10^{-3} moles [/tex]
Now, we need to find the concentration of the OH⁻ ions.
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} [/tex]
Where V is the volume of the solution = 1.00 L
[tex] [OH^{-}] = \frac{n_{NaOH}}{V} = \frac{3.01 \cdot 10^{-3} moles}{1.00 L} = 3.01 \cdot 10^{-3} mol/L [/tex]
Finally, we can calculate the pH of the solution as follows:
[tex] pOH = -log([OH^{-}]) = -log(3.01 \cdot 10^{-3}) = 2.52 [/tex]
[tex] pH + pOH = 14 [/tex]
[tex] pH = 14 - pOH = 14 - 2.52 = 11.48 [/tex]
Therefore, the pH of the solution is 11.48.
I hope it helps you!
For the reaction S + O2 →SO2 a. Write the balanced chemical equation b. if 6.3 g of S is reacted with 10.0 mole of O, show by calculation which one will be the limiting reactant. c. How much SO3 can be produced?
Answer:
私の英語は非常に悪いですが、私が間違えなければ、120を作ることができます。これを翻訳するだけ 私の英語は、悪いですが、私が間翻訳する、120を翻訳します。My English is very bad, but if I make a mistake, I can make 120. Translate this
Н
Н-ҫ—Н
НЕС-Н
Н
Н—-
I0-1
-С
Hн
Г.Г.
-с-с-Н
|
Hн
Н
н
Answer:
I believe the ans is 3- ethyl pentane
what is the equation of CH3-CH=CH2 + Cl2 →
Answer: CH3CHClCH2Cl
Explanation:Equation is already balanced
explain ocean acidification
Answer:
Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere
Explanation:
Answer:
Ocean acidification affects marine life
Acidification reduces the availability of carbonate ions in ocean water, which provide the building blocks these organisms need to make their shells and skeletons, significantly reducing the chances for their offspring to survive.
Explanation:
Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO. 2) from the atmosphere. The main cause of ocean acidification is the burning of fossil fuels.
How many manganese atoms are in
Ba(MnO4)2?
There are 2 manganese atoms are in Ba(MnO4)2.
Answer:
Explanation:
the top person of me is right bc i have all my notes here and they are right its 2 :)
help me get this right no links
Answer:
the rise and fall is the tides.
How many oxygen atoms were used to write Felicia’s name?
Answer:
Explanation:
https://opentextbc.ca/introductorychemistry/chapter/molecules-and-chemical-nomenclature-2/
Based on how they obtain their food, fungi are _____. A plant-like B animal-like
Answer:
whats is it?
Explanation:
Answer: A. Plant Like
Explanation:
They can obtain energy from photosynthesis through the sun.