Answer:
1.9992x10^-23
Explanation:
The thing is 6.022*10^23 atoms of carbon is 12g. so 1 atom of carbon will contain:
12/6.022*10^23 = 1.9992x10^-23
hope its clear and helps...
How many significant digits will the answer in the following calculations result in?
12.1 - 12.004
Answer:
The answer will result in one significant digit.
Explanation:
1. Subtract:
12.1 - 12.004 = 0.096
2. ROund to the correct number of significant digits:
For addition and subtraction we round the sum or the difference to the least number of digits after the decimal point there are in the problem.
For example, SInce 12.1 has one number after the decimal point and 12.004 has three numbers after the decimal point, we round the answer to one number after the decimal point because 12.1 is the number in the problem which has the least amount of digits after the decimal point.
We round 0.096 to 0.1.
0.1 has one significant digit.
Hydrogen + Nitrogen
Ammonia
Answer:
Ammonia, NH3, is a chemical compound composed of one nitrogen atom and three hydrogen atoms.
Explanation:
i hope this will help you :)
Answer:
3H2 + N2 ---> 2NH3
Explanation:
3H2 + N2 ---> 2NH3
Hydrogen + Nitrogen Ammonia
Calculate the mass of 2.50 mol of CH,OH(1). Show your work. Use the appropriate
number of significant digits in your final answer.
Help please
Answer:
80.1 grams
Explanation:
Find the molar mass of CH3OH first by using the periodic table values.
12.011 g/mol C + (1.008*3 g/mol H) + 15.999g/mol O + 1.008 g/mol H
=32.042 so that is the molar mass
Now that you have 2.50 moles of CH3OH, you can calculate the mass in g
2.50molCH3OH * (32.042g CH3OH / 1 mol CH3OH) = 80.105
32.042g / 1 mol is the same as 32.042 g/mol
Since there are 3 sig figs in the problem (2.50 has 3 sig figs), you round to 80.1 g CH3OH
A syringe contains 610 mL of CO at 310 K and 1.5 atm pressure. A second syringe contains 520 mL of N2 at 325 K and 3.5 atm. What is the final pressure if the contents of these two syringes are injected into 2.00 L container at 10.0C
Answer:
P = 1.21atm
Explanation:
Using PV = nRT, moles of both syringes is:
Moles CO:
n = PV / RT
n = 1.5atm*0.610L / 0.082atmL/molK*310K
n = 0.0360 moles
Moles N₂:
n = PV / RT
n = 3.5atm*0.520L / 0.082atmL/molK*325K
n = 0.0683 moles.
As in the container you mix both gases, moles in the container are:
n = 0.0360 + 0.0683 = 0.1043 moles
Conditions of the container are:
V = 2.00L; T = 273.15K + 10°C = 283.15K; n = 0.1043 moles.
Thus, pressure is:
P = nRT / V
P = 0.1043mol*0.082atmL/molK*283.15K / 2.00L
P = 1.21atmThe solubility of Z is 60 g/ 100 g water at 20 °C. How many grams of solution are produced when a saturated solution is prepared using 300 grams of water at the same temperature? a 240 b 180 c 120 d 480
Answer:
Saturated solution = 180 gram
Explanation:
Given:
Solubility of Z = 60 g / 100 g water
Given temperature = 20°C
Amount of water = 300 grams
Find:
Saturated solution
Computation:
Saturated solution = [Solubility of Z] × Amount of water
Saturated solution = [60 g / 100 g] × 300 grams
Saturated solution = [0.6] × 300 grams
Saturated solution = 180 gram
According to the law of conservation of energy, what will most likely happen in a closed system?
O Energy will be exchanged along with matter.
Energy will be exchanged, but matter will not be exchanged.
Energy will be created along with matter.
Energy will be destroyed, but matter will not be destroyed.
Answer:
the answer is Energy will be exchanged, but matter will not be exchanged.
this because that in a closed system energy is able to be transfered but matter cant.
hope this helps
Answer:
b
Explanation:
none
skeleton equation for
when magnesium oxide reacts with iron, iron(III) oxide and magnesium is formed
Answer:
Magnesium oxide = MgO
Iron = Fe
Iron (III) Oxide = Fe₂O₃
Magnesium = Mg
Skeleton equation = MgO + Fe ⇒ Fe₂O₃ + Mg
Question: Which is the best analogy for classification? A.Classification is like setting up a phone tree in which one person calls the next two people, and those people call the next four people. B.Classification is like creating an alphabetized list of people based on their last names. C.Classification is like organizing a car wash where everyone brings needed items and then works. D.Classification is like organizing a closet by hanging clothes together based on their type, color, and season. *15 points cuz i'm low on points oof* *science NOT chemistry*
Answer:
The last one
Explanation:
When we are classifying we try to distinguish between the type, the properties just like clothes
Which objects will most likely float
Valency of Chlorine is 1. Why?
Answer:
Valency of Chlorine is 1 because it needs 1 electron to complete its octet (a shell of eight electrons). Valency is defined as "The combining power of an element" and Since, chlorine needs 1 electron to complete its valence shell, Its valency is 1.
You have been assigned to prepare 50.0 mL of a 3.0 %(v/v) solution in a volumetric flask from a 20.0% (v/v) Red Food Coloring (RFC) stock solution provided. Use the equation below to calculate the amount in (mL) of the RFC stock solution to prepare your assigned % solution.
Answer:
7.5mL of the stock solution
Explanation:
A stock solution is a concentrated solution that is used to make another more diluted solution.
In the problem, the RFC solution is 20% (v/v). That means contains 20mL of RFC in 100mL of solution.
Yo need to prepare 50.0mL of a 3.0% (v/v), solution (3mL of RFC in 100mL of solution). That means you need:
50.0mL solution × (3mL RFC / 100mL solution) = 1.5mL of RFC. These RFC must come from the stock solution
As your stock solution contains 20mL of RFC per 100mL of solution, you will need:
1.5mL RFC × (100mL stock / 20mL RFC) =
7.5mL of the stock solution8. What is the name of this compound?
CH3
CH3-C-Br
CH₃
sec-butyl bromide
tert-butyl bromide
isopropyl bromide
isobutyl bromide
Answer:
tert-butyl bromide
Explanation:
sec-butyl bromide
CH3 -CH-CH2-CH3
Br
tert-butyl bromide
CH3
CH3-C- Br
CH3
isopropyl bromide
CH3
CH3-CH-Br
isobutyl bromide
CH3
CH3-CH-CH2-Br
Which statement describes the role of a mitochondrion in providing a body with energy? It stores glucose that is taken from food so that respiration can happen later. It combines blood and oxygen so that energy can be released from glucose. It is the site where oxygen combines with small molecules and releases large amounts of energy. It is the site where food is broken down into small molecules and amounts of energy .
Answer:
It is the site where oxygen combines with small molecules of glucose and releases large amounts of energy
Explanation:
The quantum numbers of six electrons are given bellow .Arrange them in order to increasing energies. (a) n= 4,l =2, m= -2, s= -1/2 (b) n=3, l=2, m=1, s=+1/2 © n=4, l=1, m = 0, s=+1/2 (d) n=3, l=2, m= -2, s= -1/2 (e) n=3,l=1, m = -1, s =+1/2 (f) n=4, l=1, m=0, s = +1/2
Answer:
e< d< b< c=f< a
Explanation:
Quantum numbers refers to values that exactly describe the energy of electrons within an atom or a molecule. Electrons are known to possess a set of four quantum numbers used in describing the energy state of such electron. These quantum numbers are solutions to the Schrödinger wave equation for the hydrogen atom.
In describing any electron within the atom, the relevant set of four quantum numbers are: principal quantum number (n), orbital, azimuthal, subsidiary or angular momentum quantum number (l), magnetic quantum number (ml), and spin quantum number (ms).
In the arrangement above, the electrons are arranged in order of increasing energy. Each arrangement of quantum numbers corresponds to a particular energy state of the electron.
Which is a negative effect of deforestation on the environment? habitat restoration, desertification, soil production, or urbanization
Answer:
The correct option is desertification
Explanation:
Deforestation is the deliberate act of pulling down trees to provide a clear land for space or to make use of the trees for other purposes such as grazing, farming, timber fire wood, building and constructions, urban utilization, access roads, expansion, development of infrastructures, grazing of cattle and mining
The effects of deforestation includes climate change, flooding, increase in the proportion of green house gases in the atmosphere, soil erosion and desertification.
A negative effect of deforestation is desertification.
Deforestation refers to the cutting down of trees. There are many reasons why people may cut down trees. One of the popular reasons why people cut down trees is to obtain timber which is used for construction and as fuel.
An important consequence of the felling of trees also called deforestation is that a once fertile land may gradually be turned into a desert area. This is known as desertification.
Learn more: https://brainly.com/question/8330332
Which all separation method is used in medical field
Answer:
chromatography
Explanation:
this method of separation is used to identify harmful toxins in some medicines
Propane (C3H8) reacts with oxygen (O2) during a combustion reaction, producing carbon dioxide
(CO2) and water (H2O).
Which equation demonstrates the law of conservation of matter for this reaction?
Answer:
C3H8 + 5 O2 ------> 3 CO2 + 4 H2O
Explanation:
what's sodium chromate formula without subscript
Answer:
Na2CrO4
Explanation:
it cannot be without subscript
Fredo’s spaceship takes him to the very edge of known space. There, gravity has no effect at all. Fredo takes a baseball and tosses it into space. What will most likely happen to the ball? It will not move at all. It will return to Fredo’s spaceship. It will eventually stop moving. It will continue moving in a straight line.
Answer:
D. It will continue moving in a straight line.
Explanation:
When Fredo takes a ball and tosses it into space, the ball will move upward infinitely.
Gravity is the downward force that acts on an object.
Without gravity, or without the effect of gravity, an object will continue to move in its path with the original direction applied to it.
Answer:
D
Explanation:
I took the test
Hg(OH)2 + H3PO4 = Hg3(PO4)2 + H2O
Answer:
3Hg(OH)2 + 2H3PO4 → Hg3(PO4)2 + 6H2O
10. Write the word equation of the following skeleton equation.
CuCl(aq) + NaOH(aq) → Cu(OH),(s) + NaCl(aq)
Indicate the state of each substance in your word equation.
Someone help me out please
Answer:
See below.
Explanation:
Aqueous copper chloride reacts with sodium hydroxide aqueous solution to give a precipitate (solid) of copper hydroxide and aqueous sodium chloride.
The density of a gaseous chlorofluorocarbon (CFC) at 23.8 °C and 432 mmHg is 3.23 g/L. What is its molar mass?
Answer:
138.57 g/mol.
Explanation:
The following data were obtained from the question:
Temperature (T) = 23.8 °C
Pressure = 432 mmHg
Density (D) = 3.23 g/L
Next, we shall obtain an expression for the density in relation to molar mass, pressure and temperature.
This can be obtained by using the ideal gas equation as shown below:
PV = nRT.... (1)
Recall:
Mole (n) = maas(m) /Molar mass (M)
n = m/M
Substituting the value of n into equation 1
PV = nRT
PV = mRT/M
Divide both side by P
V = mRT/MP
Divide both side by m
V/m = RT/MP
Invert the above equation
m/V = MP /RT..... (2)
Recall:
Density (D) = mass(m) /volume (V)
D = m/V
Replace m/V with D in equation 2
m/V = MP /RT
D = MP /RT
Thus, with the above formula we can obtain the molar mass of chlorofluorocarbon (CFC) as shown below:
Temperature (T) = 23.8 °C = 23.8 °C + 273 = 296.8 K
Pressure = 432 mmHg = 432/760 = 0.568 atm
Density (D) = 3.23 g/L
Gas constant (R) = 0.0821 atm.L/Kmol
Molar mass (M) =..?
D = MP /RT
3.23 = M x 0.568 / 0.0821 x 296.8
Cross multiply
M x 0.568 = 3.23 x 0.0821 x 296.8
Divide both side by 0.568
M = (3.23 x 0.0821 x 296.8) / 0.568
M = 138.57 g/mol
Therefore the molar mass of CFC is 138.57 g/mol.
An aqueous solution of glucose (MM = 180.2 g/mol) has a molality of 2.27 m and a density of 1.20 g/mL. What is the molarity of glucose in the solution?
**Any help would be greatly appreciated!**
Answer:
Molarity of the glucose solution = 2.72 mol/L
Explanation:
Molality of a solution is defined as the number of moles of solute per kilogram of solvent.
Therefore , a 2.27 molal solution of glucose contains 2.27 moles of glucose in 1 Kg of solvent
Density of solution = 1.20 g/mL
The volume occupied by 1 Kg or 1000 g solution = mass/density
Volume of 1000 g solution = 1000 g/1.20 g/ml = 833.3 mL
Number of moles of glucose present in the solution = 2.27 moles
Molarity = number of moles / volume(L)
volume of solution in litres = 883.3/1000 = 0.8333 L
Molarity = 2.27 moles /0.8333 l = 2.72 mol/L
Therefore, molarity of the glucose solution = 2.72 mol/L
The molarity of the glucose in the solution has been 2.72 mol/L.
Molality can be defined as the moles of the solute per kg of solvent.
The molality of glucose solution = 2.27 m
2.27 moles of glucose in 1000 grams of water.
Density has been the mass per unit volume. The density can be expressed as:
Density = [tex]\rm \dfrac{Mass}{Volume}[/tex]
The density of the given glucose solution = 1.20 g/ml
The volume of 1000 grams of water has been:
Volume = [tex]\rm \dfrac{Mass}{Density}[/tex]
Volume of 1000 grams water = [tex]\rm \dfrac{1000\;g}{1.20\;g/ml}[/tex]
Volume of 1000 g water = 833.3 ml
The molarity can be defined as the mass of solute per liter of the solution.
Molarity = [tex]\rm moles\;\times\;\dfrac{1000}{Volume\;(ml)}[/tex] ......(i)
The moles of glucose in the 833.3 ml solution have been 2.27 mol.
Substituting the values in equation (i):
Molarity = 2.27 mol [tex]\rm \times\;\dfrac{1000}{833.3\;ml}[/tex]
Molarity = 2.72 mol/L.
The molarity of the glucose in the solution has been 2.72 mol/L.
For more information about the molarity of the solution, refer to the link:
https://brainly.com/question/14707974
Name the 2 fractions of petroleum which are used as fuel. Explain.
Answer: kerosene, coal
Explanation:
These are renewable resources obtained from petroleum, kerosene was used in olden times to light the lamps and are still used today for lighting purposes. Coal was used in trains to produce steam( steam powered trains).
Answer:
Fuel Oil and Kerosene Oil are used as fuel. They are an important part of our life. Kerosene Oil is primarily used in the laboratory. Fuel Oil is used in power stations.
The image is of the formation of a fault-block mountain.
Which of these most likely occurs to result in the
formation of these mountains?
O The crust is compressed
O The crust does not spread apart
The center block is forced upward.
The hanging walls from the two parallel faults slip down
Answer:
d.
Explanation:
The Formation of these mountains will be caused by
The crust does not spread apartThe center block is forced upward.The hanging walls from the two parallel faults slip downOptions B, C, and D is correct.
What are mountains?Generally, a mountain is simply defined as a body that rises dramatically above its surroundings and is distinguished by steep slopes.
In conclusion, Mountains are formed from the formation of rocks over years in an Environment.
Read more about Environment
https://brainly.com/question/17413226
#SPJ2
When a catalyst is added to a reversible reaction in equilibrium state the value of equilibrium constant
Explanation:
The value of equilibrium constant doesn't change when a catalyst is added.
Equilibrium constant depends on Concentration of reactants , Pressure and Temperature.
A suitable catalyst can improve the reaction rate. A catalyst is a material that increases the rate of a chemical reaction, but in the end, it remains unchanged chemically. It offers a lower energy alternative reaction path.
The balance of forwarding and reverse reaction rates is equal for a reversible reaction. In the presence of a catalyst, both reaction rates accelerate and expect the users to weigh more quickly.It is important to remember that adding a catalyst has no impact at all on the final balance of said reaction, which is faster.Learn more:
brainly.com/question/14784580
help me help ASAP please help and explain what this means helllllllp with this
what does this mean: the Ohhh difference is that matter has rearranged into different compounds.
Answer:
In my world, the term ASAP usually means “I need it now,” or, “As quickly as you can,” and sometimes even, “Drop everything you're doing and do this right now.” But if I'm asking someone to complete a task via e-mail, G-chat or a Post-It note, the urgency behind my “ASAP” can't be heard.
Explanation:
I hope it helps you please mark me as brainlist. Bye
Answer:
Explanation:
Hhh
What molecule can form hydrogen bonds with others like it A. CF4 B. HCL C. CO2 D. NH3
Answer:
D. NH3
Explanation:
Hydrogen bonding exists only between hydrogen atoms, and is one of the strongest intramolecular forces. So you eliminate your choices down to B and D. HCl can't form Hydrogen bonding because of electron density and electronegativity but NH3 can, so your answer would be D.
In Act V, scene ii of Romeo and Juliet, what role does Friar John play in the catastrophe?
He creates a quarantine, which impacts Romeo.
He secretly performs Romeo and Juliet's wedding.
He mistakenly tells Balthasar that Juliet is dead.
He fails to deliver an important letter to Romeo.
Answer:
I believe its the 4th one. He goes to give Romeo the message but before he is able to, Balthasar tells Romeo that Juliet is dead. Friar John just wasn't there in time.
Answer:
D) he fails to give Romeo an important letter
Explanation:
i took the test. edge 2020
5. How many atoms and molecules of sulphur are present in 64.0 g of sulphur (S 8 )?
Answer:
There are [tex]1.202\times 10^{24}[/tex] atoms and [tex]1.502\times 10^{23}[/tex] molecules in the compound.
Explanation:
The molar mass of the sulphur is [tex]32.065\,\frac{g}{mol}[/tex]. The Avogradro's Law states that exists [tex]6.022\times 10^{23}\,\frac{atom}{mol}[/tex]. The quantity of atoms in a quantity of mass is derived from dividing the mass by the molar mass and multiplying it by the Avogadro's Number. That is:
[tex]n_{atom} = m_{S}\cdot \frac{n_{A}}{M_{S}}[/tex]
Where:
[tex]m_{S}[/tex] - Mass of the sample, measured in grams.
[tex]n_{A}[/tex] - Avogadro's Number, measured in atoms per mole.
[tex]M_{S}[/tex] - Molar mass of the sulphur, measured in grams per mole.
If [tex]m_{S} = 64\,g[/tex], [tex]n_{A} = 6.022\times 10^{23}\,\frac{atoms}{mol}[/tex] and [tex]M_{S} = 32.065\,\frac{g}{mol}[/tex], then:
[tex]n_{atom} = (64\,g)\cdot \left(\frac{6.022\times 10^{23}\,\frac{atoms}{mol} }{32.065\,\frac{g}{mol} }\right)[/tex]
[tex]n_{atom} = 1.202\times 10^{24}\,atoms[/tex]
There are [tex]1.202\times 10^{24}[/tex] atoms in the compound.
Now, the molecular weight of the compound is:
[tex]M_{S_{8}} = 8\cdot \left(32.065\,\frac{g}{mol} \right)[/tex]
[tex]M_{S_{8}} = 256.52\,\frac{g}{mol}[/tex]
The quantity of molecules in a quantity of mass is derived from dividing the mass by the molecular weight and multiplying it by the Avogadro's Number. That is:
[tex]n_{molecule} = m_{S_{8}}\cdot \frac{n_{A}}{M_{S_{8}}}[/tex]
Where:
[tex]m_{S_{8}}[/tex] - Mass of the sample, measured in grams.
[tex]n_{A}[/tex] - Avogadro's Number, measured in atoms per mole.
[tex]M_{S_{8}}[/tex] - Molecular weight of the compound (octosulphur), measured in grams per mole.
If [tex]m_{S_{8}} = 64\,g[/tex], [tex]n_{A} = 6.022\times 10^{23}\,\frac{molecules}{mol}[/tex] and [tex]M_{S_{8}} = 256.52\,\frac{g}{mol}[/tex], then:
[tex]n_{molecule} = (64\,g)\cdot \left(\frac{6.022\times 10^{23}\,\frac{molecules}{mol} }{256.52\,\frac{g}{mol} }\right)[/tex]
[tex]n_{molecule} = 1.502\times 10^{23}\,molecules[/tex]
There are [tex]1.502\times 10^{23}[/tex] molecules in the compound.