Answers
Answer:
1) H - hydrogen - 1.100797
2) HE - helium - 4.00260
3) LI - lithum -6.941
Explanation:
On the periodic table the mass of carbon is reported as 12.01 amu. This is the average atomic mass of carbon. No single carbon atom has a mass of 12.01 amu, but in a handful of C atoms the average mass of the carbon atoms is 12.01 amu.
Related Questions
Which of the following are needed for an electrical circuit? Choose all that apply
A.A mental conductor for electrons to pass through
B.light bulb
C.two negative ends to a battery
D.closed loop
E.charged battery to provide an electrical difference
Answers
Answer:
E\charged battery to provide electronic difference
How many particles would be found in a 12.7 g sample of ammonium carbonate? Show workkk
Answers
Answer:
7.8286×10²¹ particles
Explanation:
give me brainlist please
Ca+P criss cross method
Answers
Answer:
[tex]t \o \: know \: the \: answer \: [/tex]
[tex]refer \: to \: the \: attatchment[/tex]
Explanation:
Hope this helps !!PLEASE HELP CHEMISTRY
What is the hydronium ion concentration of a solution with a POH of 6.90?
O 6.29 x 10-7 M
6.53 x 10-7 M.
O 7.18 x 10-8 M
O 7.94 x 10-8 M
Answers
Answer:
O 7.94 x 10-8 M
Explanation:
Did the test
The hydronium ion concentration of a solution with a pOH of 6.90 is 7.94 × 10⁻⁸ M.
What is the relation between pH & pOH?Relation between the pH and pOH will be represented by the below equation as:
pH + pOH = 14
Given that pOH = 6.90
So, pH = 14 - 6.90 = 7.1
Also we know that, pH = -log[H⁺]
[H⁺] = [tex]10^{-pH}[/tex]
[H⁺] = [tex]10^{-7.1}[/tex]M
[H⁺] = 7.94 × 10⁻⁸ M
Hence the concentration of hydronium ion is [tex]10^{-7.1}[/tex] M.
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what are three physical properties with constant value
Answers
Answer: Certain physical constants (e.g., melting point, boiling point, density, refractivity, solubility) can be found in the literature for many compounds, whereas others (e.g., specific rotation) are characteristic of different groups of compounds and are known for almost all of them.
Explanation:
1. What is the Speed equation?
a. S= D/T
c. A= Fv-lv/T
b. A= lv - FIT
d. S= T/D
Answers
Answer:
A
Explanation:
distance over time is speed's equation
Which of the following is true for the percentage yield of a reaction?
А. It is the combined yield from the excess reactant and the limiting reactant.
B. It is the calculated yield of the product based on stoichiometry alone.
C. It is calculated based on stoichiometry as well as experimentation.
D. It is the yield of the product from the limiting reactant alone.
Answers
Answer:
It is always less than the theoretical yield
Explanation:
For many chemical reactions, the actual yield is usually less than the theoretical yield. This is due to possible loss in the process or inefficiency of the chemical reaction.
A ball rolls down a hill. It starts with velocity of 2 ms. After 2 seconds, the ball has a velocity of 12 ms. What is the acceleration of the ball? 2 ms2 4 ms2 5 ms2 7 ms2
Answers
Answer:
5 ms2
Explanation:
The acceleration of the ball is 5 ms2.
What is acceleration?Acceleration is the rate at which an object's velocity with respect to time changes. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration.
The acceleration of the car in its present direction of motion is referred to as a linear acceleration (or tangential acceleration in circular motions), and the passengers on board feel a force pressing them back into their seats as a result.
The acceleration that is used to change direction is referred to as radial acceleration (or centripetal acceleration in circular travels), and the reaction that the passengers feel is a centrifugal force.
Therefore, The acceleration of the ball is 5 ms2.
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Where do properties of matter come from?
Answers
Answer:
Extensive or inextinsive and either physical or chemical
How does dissolving skittles apply to the real world?
Answers
Answer:
Skittles are coated with sugar and food coloring. When you add warm water to the Skittles, the sugar and food coloring start to dissolve. They have similar amounts coated on them so they dissolve at similar speeds and stay in their lanes.
The sugar is moving to areas of water with lower sugar concentration. If the water is poured in the center, this is happening for each Skittle at relatively the same speed.
Explanation:
How many neutrons are in K-37?
Answers
Answer:
is this physics
pls check your questions and try again
What is the mass of 3.2 L of water in centigrams?
Answers
Can anyone pls answerrrrt
Answers
Answer:
wdym
Explanation:
hmm
calculate the mass of sodium sample that it contains 2 Na atoms of sodium
please i need help with this ques.
Answers
Answer:
45.98 I believe if its wrong im sorry
Who ever gets it right I will give brainly and 20 points
Answers
Answer:
LETTER C it can apply a greater output force over a greater distance compared to the input force and distance
Explanation:
i just know cause im smart like that
Si echamos en un vaso agua y sal el ¿huevo flotaria ? por que
Answers
What mass of aluminum must react with 100 g of copper (ii) phosphate? (10g)
Answers
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole =given mass ÷ molar mass
2 Al + 3 Cu[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] → Al[tex]_2[/tex] (PO[tex]_4[/tex])[tex]_3[/tex]+ 3 Cu
moles of copper phosphate= 100 g/380.58
=0.26 moles
3 moles of copper sulphate need 2 mole of Al
0.26 moles of copper sulphate need (2/3)×0.26
=0.17moles
mass of Al= 0.17×26
=4.42g
Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
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4. Initially, 1 mol of oxygen (assumed to be an ideal gas) has temperature 310 K and volume 12 L. We will allow it to expand to volume 19 L. (a) What would be the final temperature if the gas expands adiabatically
Answers
Answer:
490.83 oK
Explanation:
First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.
This also assumes that no change has occurred in the pressure.
T1 = 310 oK
T2 = ?
V1 = 12 L
V2 = 19 L
T1/V1 = T2/V2
310 / 12 = x/19 Multiply both sides by 19
310*19 / 12 = T2 Multiply 310 * 19 on the left.
5890 / 12 = T2 Divide by 12
490.83 = T2
1. How many centimeters are in 13.4 inches?
Answers
34.036 Thats how many
Answer:
34.036
Explanation:
There are 2.54 centimeters in one inch so you multiply 13.4 and 2.54 to get 34.036.
Help! It’s due in 1 minute
Answers
The answer is the last option, Zn + S ➡️ ZnS.
1) Which of the following is true about Earth’s plates?
a. Earth’s plates are separated by oceans.
b. Earth’s plates are piled on top of one another within the Earth.
c. Earth’s plates fit closely together with the edges of the plates touching each other.
d. Earth’s plates are surrounded by melted rock and do not touch each other.
Answers
Answer:
a because the others whould cause earthquakes
Explanation:
Answer:
A
Explanation:
because i think is A (if is not im sorry )
A sample of a compound contains 1.65 × 10²³ atoms of C, 0.552g of H, and 4.39g of O. What is the molecular formula and molar mass of the compound?
Answers
Answer:
C1 H2 O16
Explanation:
How many atoms are in 80.45 g of magnesium with explanation
Answers
Answer:
There are 1.9926 * 10 ^24 atoms.
Explanation:
M ( Mg ) = 80.45 g
We can find the molar mass of magnesium in the Periodic table:
M ( Mg ) = 24.31 g / mole
n = 80.45 g : 24.31 g/mole = 3.31 moles
N a ( Avogadro`s constant ) = 6.02 * 10 ^23
N = Na * n = 6.02 * 10 ^24 * 3.31 = 19.926 * 10 ^23
What is the difference between a conductor and an insulator?
Answers
An insulator does the opposite and instead, stops either from going through. Examples of an insulator is paper, wood, rubber, etc.
How to get rid of high cholesterol?!
Please tell me
Answers
you have to drink a lot of water and 67890
Given the speed of light as 3.00 x 10° m/s, calculate the
wavelength of the electromagnetic radiation whose frequency
is 9.500 x 101° Hz.
Answers
Answer:
the answer is mabye 30 I didnt understand
The electron configuration of a cation with a 2+ charge is shown below.
1s22s22p63s23p6
What is the electron configuration for the ion's neutral parent atom? The atom is a main group
element. Name the group that the parent atom likely belongs to on the Periodic Table and identify
one chemical property of the parent atom.
Answers
The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³
From the question,
The cation has a charge of 2+. This means the neutral atom lost 2 electrons.
From the given electron configuration, the cation has 18 electrons.
Therefore, the neutral atom of ion will have 20 electrons.
∴ The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
The atom belongs to group 2 on the periodic table.
One chemical property of the parent atom
Its density is 1.54 g/cm³
Hence, The electron configuration for the ion's neutral parent atom is
1s²2s²2p⁶3s²3p⁶4s²
It belongs to group 2 on the periodic table and one of its chemical properties is, it has a density of 1.54 g/cm³
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Choose all the answers that apply.
What’s is the freezing point of water?
1. 0’c
2.32’c
3.32’F
4.0’F
Answers
Answer: The answers are the first and third options.
Answer:
1.0'c
3.32'f
Explanation:
Elements that are usually dull, brittle and do not conduct electricity are know as______.
Points: 46
Answers
Answer:
nonmetal
Explanation:
.........
...
.
True/False: For the same system, heterogeneous nucleation will occur at less undercooling than homogeneous nucleation.
Answers
Answer:
True.Explanation:
same system, heterogeneous nucleation will occur at less undercooling than homogeneous nucleation.