Answer: Lithium nitride
Explanation:
Lithium nitride is a compound with the formula Li3N. It is the only stable alkali metal nitride. The solid has a reddish-pink color and high melting point
1. if 100 ML of a 12.0 M HCL solution is diluted to 2.00 L, what is the molarity of the final solution?
Explain in terms of particle volume, why the sample of helium can not be compressed to zero volume
Answer:
because each atom of helium occupies space. ... State a change in pressure that will cause the helium in the cylinder to behave more like an ideal gas.
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the sample of helium can not be compressed to zero volume because each atom of helium occupies space.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles. The sample of helium can not be compressed to zero volume because each atom of helium occupies space.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of gas
V= volume of gas
n =number of moles of gas
T =temperature of gas
R = Gas constant = 0.0821 L.atm/K.mol
Therefore, the sample of helium can not be compressed to zero volume because each atom of helium occupies space.
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which particle has the least mass
a. electron
b. proton
c. neutron
d. all have the same mass
Answer:
b. proton
Explanation:
The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom. Electrons have an electric charge of −1, which is equal but opposite to the charge of a proton, which is +1.
The force resulting from oppositely charged poles is ...
explain why numerical prefixes are not needed on the names of ionic compounds ?
Answer:
two ions can combine in only one combination.The number of ions is not fixed in a compound.
Iron reacts with chlorine gas, Cl2, to form iron(III) chloride, FeCl3
Write the balanced equation for this synthesis reaction.
Answer:
2Fe + 3Cl2 --> 2 FeCl3
Explanation:
Fe + Cl2 --> FeCl3
iron is balanced but chlorine isn't so we find what number can make each one equal
Fe +3Cl2 --> 2FeCl3
now we need to balance iron
2Fe + 3Cl2 --> 2 FeCl3
Which of the following is an electrolyte?
a. Fe(OH)3
b. Al2(CO3)3
c. KCN
d. Ag2S
Answer:
The answer is C: KCN
Explanation:
KCN is a strong electrolyte. Electrolytes is inside your body to renergize you and help you stay strong.
ammonia NH3 percentage composition
Answer:
82.24% percent composition of N and 17.76% percent composition of H .
Explanation:
What are index fossils and how do they help scientists determine the age of rocks?
Answer:
index fossils are important for index fossils because
they use them to match up rock layers in certain locations
that may be far apart!
they are ALSO important to scientists because it helps them with relative age.
Explanation:
For the balanced equation shown below, how many moles of O2 b
produced by 0.4379 moles of C6H5F?
C6H5F + 402 – 600 + 2H2O + HF
If the energy of a photon of light is 3.37 x 10–19 J, what is the frequency of the light? A. 1.12 x 10–27 s –1 B. 8.90 x 1026 s –1 C. 5.09 x 1014 s –1 D. 6.70 x 10–44 s –1 E. 1.01 x 10–10 s –1
Answer:
The appropriate alternative is option C "[tex]5.09\times 10^{14} \ s[/tex]".
Explanation:
The given value is:
Energy of photon,
E = [tex]3.37\times 10^{-19} \ J[/tex]
As we know,
h = [tex]6.626\times 10^{-34} \ Js[/tex]
Now,
The frequency of the light will be:
⇒ [tex]E=hv[/tex]
On substituting the given values, we get
⇒ [tex]3.37\times 10^{-19}=6.626\times 10^{-34}\times v[/tex]
On solving, we get
⇒ [tex]v=5.09\times 10^{14} \ s[/tex]
If the energy of a photon of light is 3.37 x 10⁻¹⁹ J, then the frequency of the light is 5.09 x 10¹⁴ per sec.
How we calculate frequency?Frequency of light will be calculated by using the below formula:
E = hυ, where
E = energy of photon = 3.37 x 10⁻¹⁹ J
h = plank's constant = 6.626 × 10⁻³⁴ Js
Putting these values on the above equation and calculate for the frequency as:
υ = 3.37 x 10⁻¹⁹ J / 6.626 × 10⁻³⁴ Js = 5.09 x 10¹⁴ per sec
Hence, option (C) is correct i.e. 5.09 x 10¹⁴ per sec.
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during the combustion of methane (CH4), one mole of methane gas combines with two moles of oxygen gas (O2) to produce one mole of carbon dioxide gas (CO2) and two moles of water vapor. Which of the following chemical equations correctly represents the combustion of methane described above?
a)CH4(g) + 2O(g) ↔ CO2(g) + 2H2O(g)
b)CH4(g) + 2O(g) ↔ CO(g) + 2H2O(l)
c)CH4(g) + 2O2(g) ↔ CO2(g) + 2H2O(g)
d)CH4(g) + 2O2(g) ↔ CO(g) + 2H2O(l)
Answer:
a) cH4(g) +2O(g)__ CO2(g) +2H2O(g)
I hope this help
The point at which liquid absorbs enough energy to rapidly become a gas is known as the ____?
Answer:
Cycle
Explanation:
The change in mass during a nuclear reaction is given
by which equation?
Select one:
A
B
C
D
Answer:c
Explanation:
c
The weight of 112 liters of carbon dioxide at STP would be
44.09.
True or false?
Answer:
False
Explanation:
Its false
Magnesium reacts with the oxygen in the air to form magnesium oxide. If 35 g of O2 was used in the reaction. How many Liters of O2 were present at 301K and a pressure of 1.35 atm?
Answer:
20.02 Liters
Explanation:
Mass = 35g
Volume = ?
Temperature = 301K
Pressure = 1.35 atm
The relationship between the quantities is given as;
PV = nRT
n = mass / Molar mass = 35 / 32 = 1.09375 mol
V = nRT / P
V = (1.09375 * 0.0821 * 301) / 1.35
V = 20.02 L
what is the electronic configuration of the atom x
Answer: K L M. 2 8 6.
Explanation:
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2. A. 66 grams B. 33 grams c. 132 grams. D 8.72 grams
Answer:
Option A. 66 g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
CH₄ + 2O₂ —> CO₂ + 2H₂O
Next, we shall determine the mass of CH₄ that reacted and the mass of CO₂ produced from the balanced equation. This is illustrated below:
Molar mass of CH₄ = 12 + (4×1)
= 12 + 4 = 16 g/mol
Mass of CH₄ from the balanced equation = 1 × 16 = 16 g
Molar mass of CO₂ = 12 + (16×2)
= 12 + 32 = 44 g/mol
Mass of CO₂ from the balanced equation = 1 × 44 = 44 g
SUMMARY:
From the balanced equation above,
16 g of CH₄ reacted to produce 44 g of CO₂.
Finally, we shall determine the theoretical yield of CO₂. this can be obtained as follow:
From the balanced equation above,
16 g of CH₄ reacted to produce 44 g of CO₂.
Therefore, 24 g of CH₄ will react to produce = (24 × 44) /16 = 66 g of CO₂.
Thus, the theoretical yield of CO₂ 66 g
The theoretical yield of CO₂ is 66 grams.
The balanced chemical equation of the reaction is as follows:
CH₄ + 2O₂ → CO₂ + 2H₂O
mass number of CH₄ = 16 g
mass number of CO₂ = 44 g
Therefore,
16 of CH₄ produced 44g of CO₂
24 g of CH₄ will give ? of CO₂
cross multiply
mass of CO₂ produced = 24 × 44 / 16
mass of CO₂ produced = 1056 / 16
mass of CO₂ produced = 66 grams
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10. The electronic configuration of two elements X and Y are given below:
Зр
An
8p
compound.
Answer:
Pppppppp pppppppp pppppppp pppppppp
Which has a greater atomic radius silicon or magnesium
global warming is caused by an increase in the level of carbon dixode gas in the atmosphere. How has this affected the world's oceans?
When K2Cr2O7 is cooled from 80oC to 20oC, how much solute will precipitate out of the solution?
Answer:
The amswer to the question is A
Oxygen Gas (O₂)
A. 2 atoms of oxygen
B. 2 atoms of hydrogen
C. 3 atoms of oxygen
D. 1 atom of oxygen
Balance the following equation
H2SO4 + Ca(OH)2 --> CaSO4 + H20
PLEASE HELP
Answer:
H2SO4 + Ca(OH)2 --> CaSO4 + 2H2O
WILL GIVE BRAINLY
What are three facts about the biosphere that are in depth
Answer:
Facts About Biosphere 1: The Evolution Of Biosphere
Biosphere has evolved. It started from the non living matter or simple organic compound which created the life. This process is called bioprocess which conducted around 3.5 billion years ago.
Facts about Biosphere 2: the life of earth
It is not easy for the scientists to determine the life of earth. However, they can estimate it after the discovery of the metasedimentary rocks from Western Greenland. The scientists believed that it was dated back around 3.7 billion years old.
Facts About Biosphere 3: Another Evidence For The Earth’s Life
Evidence was found in Western Australia. The discovery of microbial mat fossils made the scientists estimated that the earth was dated around 3.48 billion years ago.
Which group would we find the element of this
atom in?
group 8
group 2
group 6
group 5
If you have 1.8 moles, how many atoms would you have?
Answer: 1.08×10^24 atoms
How many moles are in 1.2x10^3 grams of ammonia, NH3?
If a compound has a molar mass of 70.13 g/mol and its empirical formula is CH2, what is its molecular formula
The molecular formula is ALWAYS, a whole number multiple of the empirical formula....and of course the multiple might be one...
And so we can write....
{empirical formula}n=molecular formula
And taking the given molecular mass of 70.13⋅g⋅mol−1
n=70.13⋅g⋅mol^−1/(12.011+1.00794×2)⋅g⋅mol−1=5
And so....
{CH2}×5=C5H10
The empirical formula of the compound is CH₂ . Then, the formula mass is 14 g. If the molar mass of the compound is 70.13 g the compound has the molecular formula of C₅H₁₀.
What is empirical formula ?The empirical formula of a compound is the formula derived from the number of moles of the constituent elements of the compound. The number of moles of the elements present can be calculated from their given masses and atomic mass.
The formula mass of a compound is the mass of the elements with their number of atoms as in the empirical formula.
given the empirical formula is CH₂.
atomic mass of C = 12 g/mol
atomic mass of H = 1 g/mol
then formula mass = 12 + 2 = 14 g.
Divide the molar mass by formula mass;
molar mass = 70.13 g
70.13 g/14 g = 5
Now, multiply the empirical formula by 5 to get the molecular formula.
ie. C₅H₁₀.
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Fe,0, is an example of
Answer:
it is the example of molecules