Answer:
The answer is oxygen
element A it's valance number is 3 and element B it's valance number is 6 make it compound
Answer:
A2B
Explanation:
A = 3
B = 6
exchange valencies
A6B3
A2B
Can somebody plz help answer these false and truth questions correctly (only if u know for sure) thx :3
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DD
Answer:
1. false
2. true
3.true
4.true
Explanation:
Answer:
1. True
2. True
3. True
4. True
5. True
HOPE THIS HELPS
What volume (in L) of water vapor will be
produced from the reaction of 4.95 L of ethane
(C2He)?
2C2H6(g) + 702(9) — 4CO2(g) + 6H2O(g)
Answer:
14.85L of water are produced
Explanation:
Based on Avigadro's law, the volume is directly proportional to the moles of a gas.
Based on the equation:
2C₂H₆(g) + 7O₂(g) → 4CO₂(g) + 6H₂O(g)
2 moles of ethane produce 6 moles of H₂O.
Using Avogadro's law: 2L of ethane produce 6L of H₂O.
The addition of 4.95L of ethane are:
4.95L ethane * (6L H₂O / 2L C₂H₆) =
14.85L of water are producedSuppose you have a mixture of iron filings, sand, and sugar and you want to separate the three. Fill in the materials you expect to see at each step as you perform the actions shown to separate them. The materials you may expect to see are: iron filings, sand, sugar, and sugar water.
Answer:
Explanation:
mixture of iron filings, sand, and sugar
First Step - Iron Fillings
Use a magnet to separate the iron fillings from the mixture. Due to magnetic properties of the iron fillings, the magnets would attract the iron fillings and separate it from the mixture.
Second step - Sand
Place the sand and sugar mixture in water. The sugar would dissolve in water and the sand easily separated by filtration.
Third step - Sugar and Sugar water
Boil the sugar water to remove the water and place in the refrigerator for crystallization of the sugar.
Construct an ICE table to calculate the equilibrium concentration of S2− in a solution containing 0.04 mol of Fe(NO3)2. The Ksp of FeS is 8.0 x 10−19. Complete the table by typing in the correct answer, represented by the orange letters in the ICE table. (When typing a number that is between 0 and 1, insert a 0 before the decimal, and type values to two decimal places.)
Answer: a: 0.04
b: 0
c: x
d: x
e: x
f: 0.04
Explanation:
Atomic Radius________across (left to right) a period and______down a group.
Answer: Decreases across the period and increases down the group
An increase in the volume of a substance because of an increase in temperature is called
Answer:
Its called contraction.
Explanation:
Dominant genes are represented with lowercase letters while recessive genes are represented with capital letters.
1. True
2.False
Answer:
True
Explanation:
I gave brainlest:: answer this .....
A 100.-gram sample of H2O(l) at 22.0°C absorbs 830. joules of heat. What will be the final temperature of the water? Hurry pleaseeee!!!
Answer:
That is extremely confusing. Try contacting your prof.
Explanation:
PLZZZ HELP MEEEE!!!!! I WILL GIVE BRAINLIEST!!!!!!!!!
Combine Boyle’s law, Charles’s law, and Gay-Lussac’s law into a single proportional relationship between pressure (P), volume (V), and temperature (T). Use the symbol “∝” to represent “is proportional to.”
Explain your reasoning.
On combing Boyle’s law, Charles’s law, and Gay-Lussac’s law into a single proportional relationship law:
[tex]PV\propto T[/tex]
Explanation:
Boyle's law states that the pressure of the ideal gas is inversely proportional to the volume occupied by the ideal gas at a constant temperature in Kelvins.[tex]P\propto \frac{1}{V}[/tex] ( Constant temperature)
Charle's law states that volume occupied by the ideal gas is directly proportional to the temperature of the ideal gas in Kelvins, under constant pressure.[tex]V\propto T[/tex] (Constant pressure)
Gay-Lussac’s law states that the pressure of the ideal gas is directly proportional to the temperature of the ideal gas in Kelvins, under a constant volume.[tex]P\propto T[/tex] (Constant volume)
On combing Boyle’s law, Charles’s law, and Gay-Lussac’s law into a single proportional relationship law we get:
[tex]PV\propto T[/tex]
In the above relation all the three laws; Boyles law, Charles law, and Gay Lussac's laws are followed.
Learn more about Gas laws here:
brainly.com/question/1190311?referrer=searchResults
brainly.com/question/12669509?referrer=searchResults
can someone help please?
Answer:
Genetic Factors: Bad tasting leaves, plant structure, types of stems, reproduction
Environmental: insects, pollution, terrain, soil conditions, pH of soil, fire, flood, heat wave, temperature, lack of air, drought,
Explanation:
Genetic factors are within the organism, the plant's own make-up. Environmental factors are conditions on the outside, in the soil, the atmosphere, and other organisms in the habitat.
Why do elements form lons? In other words, why do elements gain or lose electrons? Be specific.
Answer: Ionic bonds form only between metals and nonmetals. That's because metals “want” to give up electrons, and nonmetals “want” to gain electrons. It takes energy to remove valence electrons from an atom and form a positive ion. Energy is released when an atom gains valence electrons and forms a negative ion
Upon combustion, a compound containing only carbon and hydrogen produces 2.28 gCO2 and 0.702 gH2O. Find the empirical formula of the compound.
Answer:
EF = CH₂
Explanation:
The empirical formula of any compound would be the most simplified and simple chemical formula of a compound. To get this number, we need to get the data of how many moles of each atom of the compoud we have.
Analyzing the data, we just know that an unknown compound undergoes a combustion reaction and produces CO₂ and H₂O. As the compound only have Carbon and hydrogen, it's pretty easy to get the moles of each atom.
To get the moles of CO₂, we need the molar mass of CO₂, which is 44 g/mol, then the moles:
nCO₂ = 2.28 / 44 = 0.0518 moles of CO₂.
Now that we have the moles of CO₂, we can get the moles of Carbon. Since 1 mole of CO₂ is made of 1 mole of Carbon and 2 moles of oxygen, this means that we have 0.0518 moles of C.
Applying the same thing with the water, we have:
nH₂O = 0.702 / 18 = 0.039 moles of water
And 1 mole of water is made of 1 mole of oxygen and two moles of hydrogens, then the moles of Hydrogen are 0.078 moles.
With these moles, we can now calculate the empirical formula.
C = 0.0518 / 0.0518 = 1
H = 0.078 / 0.0518 = 1.51 ≅ 2
Now these two numbers, give us the number of atoms, in the empirical formula so:
EF = CH₂Of course there is no compound that have only those number of atom, but remember that this is the empirical formula, so, it's a simplified or reduced formula of the molecular formula, which means that the real or whole molecular formula could have more atoms of C and H, but to know this, we need the molar weight of this compound, and the problem does not give this data.
Hope this helps
why is productivity greatest near the ocean's surface?
Answer:
Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there. ... Upwelling brings nutrients to the surface.
A surplus (having “extra”) or deficit (having “fewer”) of electrons?
Answer:
Charge
Explanation:
A surplus (having "extra") or deficit (having "fewer") of electrons possessed by an object. A charge can cause attractive or repulsive forces which can be observed in some cases (e.g. pith balls, bits of plastic).
What can you determine about the atomic structure of an element if you know the atomic number of the element and mass number of its isotope? Enter your answer in the space provided.
Answer:
THe atomic number of an element is the same number of protons and electrons the element has.
Explanation:
The atomic number is the number of protons that is equal to the of electrons. Also, the mass numbers can be used for the number of neutrons. So the isotope of the element and its valency can be determined by the atomic number and mass number.
What is the atomic number?Because they are calculated by counting whole items, the atomic b and mass number are always whole values (protons, neutrons, and electrons). The total number of subatomic particles found in an atom is equal to the sum of the mass number and atomic number for an atom (A-Z). The mass number indicates, in atomic mass units, the mass of the atom's nucleus (amu).
The amount of protons each element has determined its atomic number, which is used to distinguish one element from another. The total number of protons and neutrons in an element determines its mass number.
All of the elements in the contemporary periodic table have rising atomic numbers, and as a result, increasing mass numbers. As you are aware, an atom is made up of protons, neutrons, and electrons.
We can determine an atom's valency by counting the number of electrons in its outermost shell. Similar to this, the atomic number and mass number of the atom are related to the number of protons and neutrons.
Therefore, the knowledge of the atomic number and mass number can help in determining the valency and isotope of the element.
Read more about the atomic numbers, here
https://brainly.com/question/16858932
#SPJ2
how many lbs are in 60 oz
Answer:
3 pounds 13 ounces
Explanation:
Math
Answer:
3.75
Explanation:
Pb(OH)4 + Cu2O --> PbO2 + CuOH what is the balanced equation
Answer:
Pb(OH)4 + 2Cu2O → PbO2 + 4CuOH
Explanation:
Pb(OH)4 + Cu2O --> PbO2 + CuOH
The end goal of balacing chemical equations is to make sure there is no gain or loss of atoms of elements. Number of atoms of elements in the left side (reactant) must balance with the right side (product) of the reaction.
Currently, the number of Cu, H and O atoms are not balanced.
Pb
Reactant = 1, Product = 1
O
Reactant = 5, Product = 3
Cu
Reactant = 2, Product = 1
H
Reactant = 4, Product = 1
The balanced equation is given as;
Pb(OH)4 + 2Cu2O → PbO2 + 4CuOH
Pb
Reactant = 1, Product = 1
O
Reactant = 6, Product = 6
Cu
Reactant = 4, Product = 4
H
Reactant = 4, Product = 4
Does anyone know what the molar mass is
Answer:
the formula is M = m/n
Explanation:
M = m/n is the molar mass equals the mass of the substance divided by the number of moles of a substance
Answer:
100.93 g/mol
Explantion:
2) Which liberates the most energy?
A) F(g) + e ➡️ F-(g)
B) N(g) +e- ➡️ N-(g)
C) O(g) +e ➡️ O-(g)
D) C(g) +e ➡️ C-(g)
Answer: [tex]F(g)+e^-\rightarrow F^-(g)[/tex]
Explanation:
Electron gain enthalpy is defined as energy released on addition of electron to an isolated gaseous atom.
The amount of energy released will be maximum when the tendency to attract electrons is maximum. As flourine has atomic number of 9 and has electronic configuration of 2,7. It can readily gain 1 electron to attain stable noble gas configuration and hence liberates maximum energy.
[tex]F(g)+e^-\rightarrow F^-(g)[/tex]
Answer the question using the equation: HCl(aq)+H2O(l)→H+(aq)+Cl-(aq)+H2O(l)→H3O+(aq)+Cl-(aq) Which product is a Lewis base?
Answer:
Cl-
Explanation:
The equation of the reaction is;
H+(aq)+Cl-(aq)+H2O(l)→H3O+(aq)+Cl-(aq)
Lewis base refers to substances that can donate a lone pair of electrons(e.g OH^-, Cl^- etc) or a pair of nonbonding electrons.(eg NH3, H20 etc). A Lewis base is therefore an electron-pair donor. They are easily recognized because they often have lone pairs or are negatively charged species.
If we look at the products, Cl- is a Lewis base because it is a lone pair donor. We see this more clearly because the specie is negatively charged.
Answer:
Cl
Explanation:
What happens when the pressure of a gas is decreased?
A. The number of molecules increases.
B. The diffusion rate increases.
C. The temperature increases.
D. The volume increases.
Answer:
The combined gas law states that the pressure of a gas is inversely related to the volume and directly related to the temperature. If temperature is held constant, the equation is reduced to Boyle's law. Therefore, if you decrease the pressure of a fixed amount of gas, its volume will increase.
Explanation:
Answer:
D. The volume increases.
Explanation:
100%
how does friction affect how tractors move in mud
What element is on period 5 group/family 11
Answer:
47
Ag
Silver
107.87
Explanation:
Which electromagnetic wave has the shortest
wavelength? Describe the energy level and
frequency of this wave.
Answer:
The electromagnetic spectrum
Explanation:
ranges from gamma (γ) radiation, which has the shortest wavelength, highest frequency, and greatest energy
Select the correct answer.
Which substance is a source of hydrocarbons?
A.
natural gas
B.
protein
C.
silk
D.
starch
E.
water
Answer:
A. Natural Gas is a substance that is a source of hydrocarbons.
Explanation:
Answer:
option A . hope it helps , thanks
How many moles of H2 gas are in 15 liters?
How many molecules of water are produced by the combustion of 3.00 g of methane
Advertisements for tobacco and alcohol products work because they "tell the truth."
True
False