What dynasty came after China's Five Dynasties and Ten Kingdoms?
Answer:
The Five Dynasties and Ten Kingdoms (907-960) is a period of great division in Chinese history, and is also the collective name for the Five Dynasties and the Ten Kingdoms.
The Five Dynasties refer to the five regimes located in the Central Plains that were successively replaced after the fall of the Tang Dynasty, namely Later Liang, Later Tang, Later Jin, Later Han and Later Zhou. At the end of the Tang Dynasty, the Five Dynasties and the beginning of the Northern Song Dynasty, there were many separatist regimes outside the Central Plains, among which more than ten separatist regimes such as the former Shu, the latter Shu, and the Northern Han were collectively referred to as the Ten Kingdoms.
Explanation:
Answer:
Mongol Yuan dynasty.
Explanation:
Please help!!! Only one try. Explain why the answer is the right answer
Which equation is an example of artificial transmutation
Answer:Nitrogen can be transformed into oxygen by bombarding an alpha particle into the nucleus of nitrogen. An atom of hydrogen is produced as part of the transformation. Aluminum is transformed into phosphorous by combining the nucleus with an alpha particle
Explanation:
why electron affinity of 5 th group of periodic table increases down the group?
The electron affinity of the 5th group increases down the groups of the periodic table because the electrons are placed in a higher energy level far from the nucleus.
What is electron affinity?Electron affinity is the energy released when an electron is attached to an atom or molecule.
Electron affinity is used as a measure of its ability to form an anion.
The electron affinity of elements decrease down the group and increase from left to right across the periodic table because the electrons are placed in a higher energy level far from the nucleus.
Learn more about electron affinity at: https://brainly.com/question/13646318
#SPJ1
Which reason explains why the boiling point of water (H2O) is higher than the boiling point of hydrogen sulfide(H2S)
Options:
Ionic bonding
Covalent bonding
Hydrogen bonding
London dispersion forced
Stages of elution and regeneration
The resin may be regenerated by washing it again with water and making it safe for use again.
What is elution and regeneration ?Elution and regeneration are important processes in the treatment of water. The waste water is eluted through an ion exchange resin in which exchange of ions takes place.
The resin may be regenerated by washing it again with water and making it safe for use again.
Learn more about ion exchange resin:https://brainly.com/question/21794387
#SPJ1
help for this practice work
Answer:
It's the third option.
Explanation:
In order for the chemical equation to be correctly it needs the same number of atoms of each element on both sides of the equal sign
How does soil convert the organic matter back to co2
Determine the amount of energy required to heat 4.00 grams of H₂O (t) at 60°C to H₂O (t) at 85°C.
Answer: See attached image
Explanation:
At 20°C, the volume of chlorine gas is
15dm3. Compute the resulting volume
if the temperature is adjusted to 318K
provided that the pressure remains
the same.
Given:
Unknown:
Formula:
Solution:
Final Answer:
Solving typed question by you
20°C=293KApply charles law
V1T2=V2T115(318)=293V2V2=16.27dm³Answer:
See below ~
Explanation:
Typed question
Given :
T₁ = 20 °C = 293 KV₁ = 15 dm³T₂ = 318 KUnknown :
V₂Formula :
V₁/T₁ = V₂/T₂Solution :
15/293 = V₂/318V₂ = 318/293 x 15V₂ = 1.09 x 15V₂ = 16.35 dm³Final Answer :
16.35 dm³Question 3 (in attachment)
Given :
V₁ = 600 mLP₁ = 700 torrV₂ = 600(1 - 1/3) = 600(2/3) = 400 mLUnknown :
P₂Formula :
P₁V₁ = P₂V₂Solution :
700 x 600 = P₂ x 400P₂ = 600/400 x 700P₂ = 1.5 x 700P₂ = 1050 torrFinal Answer :
1050 torrWhich properties of a reaction make it a good choice for use in a heat engine?
CCC Matter and Energy The dashed curve shows
the average amount of radiation emitted by each
square meter of Earth's surface. On its way up,
some of that energy is absorbed or scattered by
the atmosphere. The solid curve shows the amount
that would be observed looking down from the
"top of the atmosphere" (TOA). Explain why there
are "dips" in that curve.
The amount of absorption force is not same at all time and at all where .
It has difference at different time periods
So during those the curve goes up and down and repeat this flow
So there are dips
What environment will produce the largest crystal sizes?
Construct a short Essay (Make sure you include information about Temp, Pressure, amount of dissolved solids, & cooling time)
Is there support for your Claim?
Answer:
one factor is the speed at which crystals are formed
explanation:crystals that are formed near or on the surface tend to crystalize faster and therefore are usually smaller crystals deeper in the crust tend to crystalize slower and therefore are larger
If you had 1 mol of Cr7(PO4)3 how many moles of Cr would there be?
# 1083 of LethalDose
Concentrated hydrochloric acid is 38%, by mass, HCI in water. How
many grams of HCI are there in 25.0 g concentrated hydrochloric acid?
Select one:
O a. 38.0 g
O b.
25.0 g
O c. 16.5 g
O d. 12.0 g
O e. 9.50 g
The amount, in grams, of HCl that are in 25.0 grams of concentrated hydrochloric acid will be 9.5 grams
Percentage contentEvery concentrated HCl contains 38% HCl by mass. This means that 38 grams of HCl would be in every 100 grams of concentrated HCl.
There, for 25.0 grams concentrated HCl, the amount of HCl can be calculated as:
38/100 x 25.0 = 9.5 grams
More on percentage constituents can be found here: https://brainly.com/question/26100988
#SPJ1
how many grams of granite at 54.1 c must be added to 467.62 of water at 21 C to make the final temp of both come out to be 29.2 C? Specific heat of granite 0.79 J/g C, specific heat of water 4.184 J/g C
Answer:
815.59
Explanation:
Assuming no heat lost to the Surrounding
Total heat lost by granite = Total heat gained by water
mc∆T of granite = mc∆T of water
m x 0.79 x (54.1 - 29.2) = 467.62 x 4.184 x (29.2 - 21.0)
m x 19.671 = 16043.48106
m = 16043.48106/19.671
= 815.59J
A small bar magnet is placed in the magnet field of a larger bar magnet that position marked why in the diagram below assuming the small bar mad and it is free to rotate how would it be positioned
Answer:
See below
Explanation:
The large bar magnet is positioned with S on the Left
the small magnet will position itself similar this with N on the right S on the left (opposites attract)
SCIENCE!
Kaila was organizing data about the rise in popularity of computers and internet usage
in the US. She made a table with the percentages of home with computers and internet access. Which of the following is NOT a reason that home computer and internet usage have increased?
A.more options for computer technologies
B.better offsite storage facility and server farms
C.home computers contain better technology and can be cheaper
D.better reliability of data transmissions
A balloon inflated in a room at 24 degree celsius has a volume of 4 L. The balloon is then heated to a temperature of 58 degree celsius . What is the new volume?
Answer: The new volume of the balloon will be 4.45L
Explanation: We will solve this question through the concept of Charles's law. The law states that the volume of a gas is directly proportional to the absolute temperature, assuming the quantity of gas and pressure remain constant.
If 22.5L of nitrogen at 0.98 atm is compressed to 0.95 atm,what is the new volume?
At constant temperature, if the pressure is compressed to the given value, the volume of the nitrogen gas increases to 23.2L.
What is Boyle's law?Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Given that;
Initial volume of the gas V₁ = 22.5LInitial pressure of the gas P₁ = 0.98atmFinal pressure of the gas P₂ = 0.95atmFinal volume of the gas V₂ = ?P₁V₁ = P₂V₂
V₂ = P₁V₁ / P₂
V₂ = (0.98atm × 22.5L) / 0.95atm
V₂ = 22.05Latm / 0.95atm
V₂ = 23.2L
Therefore, at constant temperature, if the pressure is compressed to the given value, the volume of the nitrogen gas increases to 23.2L.
Learn more about Boyle's law here: brainly.com/question/1437490
#SPJ1
Please help! Urgent!
Given the reaction: 2CH3OH(l) + 3O2(g)—> 2CO2(g) + 4H2O(g) how many liters of O2(g) are needed to produce exactly 200 liters of CO2
Find the empirical formula of a compound containing 26.56% potassium, 34.51% chromium, and the remainder oxygen.
Answer:
K₂Cr₂O₇
Explanation:
Finding % of O
% O = 100% - % K - % Cr% O = 100% - 26.56% - 34.51%% O = 73.44% - 34.51%% O = 38.93%Steps
Change % of each element into grams.Convert grams of each element into moles by dividing grams by molar mass.Divide all moles by the smallest number of moles.If the moles are all whole numbers, then you’re done and that’s your empirical formula.If not, multiply all moles by number such that everything is a whole number.Solving
We have 26.56g of K, 34.51g of Cr, and 39.93g of O
Moles of K, n(K) = 26.56/39.0983 = 0.68 molesMoles of Cr, n(Cr) = 34.51/51.9961 = 0.66 molesMoles of O, n(O) = 38.93/15.9994 = 2.43 molesK = 0.68/0.66 ≈ 1 x 2 = 2Cr = 0.66/0.66 = 1 x 2 = 2O = 2.43/0.66 = 3.5 x 2 = 7The empirical formula is K₂Cr₂O₇
How many neon atoms are contained in (6.73x10^2) grams of neon?
Atoms are the indivisible particles of matter. Atoms, molecular mass, and moles can be related by the Avogadros number. There are 2.00 × 10²⁵ atoms of neon in the sample.
What is mass?The mass of the substance is the multiplication product of the moles and the molar mass.
We know, that 1 mole = 6.022 x 10²³ atoms
From the Avogadro's number, mass, and the molar mass the number of atoms is calculated as:
(6.022 x 10²³ atoms ÷ 1 mole Neon) × (1 mole Neon ÷ 20.18g) × ((6.73x10²)g Ne) = 2.00 × 10²⁵ atoms.
Therefore, 2.00 × 10²⁵ atoms of neon are present in the sample.
Learn more about atoms here:
https://brainly.com/question/22824858
#SPJ1
if 14.0 g of sodium sulfide are reacting how many molecules of sodium chloride will be produced
Explanation:
If 14.0 g of sodium sulfide are reacting, how many molecules of sodium chloride will be produced?
3 Na₂S + 2 AICI36 NaCl + Al2S3
1.08 x 10^23
2.16 x 10^23
2.16 x 10^-23
5.97 x 10^-25
A 3.24-gram sample of NaHCO3 was completely decomposed in an experiment.
2NaHCO3 → Na2CO3 + H2CO3
In this experiment, carbon dioxide and water vapors combine to form H2CO3. After decomposition, the Na2CO3 had a mass of 2.19 grams.
Determine the mass of the H2CO3 produced.
Calculate the percentage yield of H2CO3 for the reaction. Show your work or describe the calculation process in detail.
PLEASE HELP, WILL MARK BRAINLIEST!!!
Mass of H2CO3 = 1.05g
Givens: NaHCO3 = 3.24
Na2CO3 = 2.19
Mass of H2CO3 = mass of NaHCO3 - mass of Na2CO3
Mass of H2CO3 = 3.24g - 2.19g
Mass of H2CO3 = 1.05g
How do you find the mass number?The number of protons and the number of neutrons combine to determine the mass number of an element. Mass number = proton + neutron. If you want to calculate the number of neutrons an atom has, you can simply subtract the number of protons or atomic numbers from the mass number.
Divide the mass of a substance in grams by the molecular weight. This will give you the number of moles of the substance in a particular mass. For 12 g of water, (25 g) / (18.015 g / mol) = 0.666 mol.
Learn more about decomposition reaction here: https://brainly.com/question/27300160
#SPJ2
13) A gas has an initial state of 500 K, 6.5 atm, and occupies 8.0 L. What will the final volume be if the pressure is kept constant and the temperature is decreased to 150 K?
How much of a 14.0 M HNO3 solution should you use to make 840.0 mL of a 0.300 M HNO3 HNO3 solution?
39200 mL of a 14.0 M [tex]HNO_3[/tex] solution should you use to make 840.0 mL of a 0.300 M [tex]HNO_3[/tex] solution.
What are moles?The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12; its symbol is “mol”.
Solution:
[tex]M_1V_1 = M_2V_2[/tex]
In this case, [tex]M_1[/tex] = 840.0 mL, [tex]V_1[/tex]= 14.0 M , [tex]M_2[/tex]= 0.300 M
Substituting the value in the equation:
[tex]V_2[/tex] = [tex]\frac{840.0 X 14.0}{0.300}[/tex]
= 39200 mL
Learn about moles here:
ps://brainly.com/question/15209553
#SPJ1
Describe the population density located along the tectonic plate boundary known as the Ring of Fire and the potential effect that earthquakes or volcanic
activity can have in this area.
(Pls no links)
Population density is the number of specific organisms living in a particular area. The tectonic plate movements in the Ring of Fire area can cause volcanic eruptions and earthquakes.
What are tectonic plates?Tectonic plates are the parts of the crust and the mantle of the earth layer that is also called the lithosphere plate. They are not stationary and have slight movements on the mantle which comprises the hot lava.
The movement of these tectonic plates in the area of the Ring of fire causes the eruption of the lava and disrupts the crust causing an earthquake. This consequence affects the life habiting them.
Learn more about tectonic plates here:
https://brainly.com/question/11840787
#SPJ1
Answer:
im pretty sure because the plates move which causes these natural disasters
Explanation:
What is the pH of a 4.2 x 10^-3 solution of HCl?
Answer:
pH = 2.38
Explanation:
Recall that HCl is a strong acid and hence dissociates completely into H⁺ and Cl⁻ ions. Thus, the solution's H⁺ concentration is equivalent to the acid concentration. That is, [H⁺] = 4.2 × 10⁻³ M.
Therefore, the pH of the solution is:
[tex]\displaystyle \begin{aligned}\text{pH} & = -\log[\text{H}^+] \\ \\ & = -\log (4.2\times 10^{-3}) \\ \\ & = 2.38\end{aligned}[/tex]
Answer:
HCl + H[tex]\\ 2[/tex]O —> Cl- + H[tex]\\ 3[/tex]O+
pH = -log [H[tex]\\ 3[/tex]O+] = -log [4.2 x 10^-3] = 2.38
—
We assume that hydrochloric acid will undergo complete dissociation in water to give stoichiometric H3O+ ion, according to the given reaction.
—
Have a nice day!!
What’s the purpose ?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Arrow head shows the direction of products formed in a reaction. so we can say that it denotes the direction of the chemical reaction. I.e From Reactant to Product.
so, the correct choice is B
Which type of solid conducts electricity the best?
• Ionic
• Molecular
• Network
• Metallic
