Answers
Answer:
[tex]1)20 \\ 2)13 \\ 3)82 \\ 4)56 \\ 5)26 \\ 6)1 \\ hope \: it \: helps \\ plzzz \: mark \: it \: as \: brainliest...[/tex]
Related Questions
What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? (5 points)
Oa
C₃H₂N
Oь
C2HAN
CHION
Ос
Od
C₂ H₂N
Answers
What is bonding all about in chemistry?
Answers
Answer:
It is like about a attraction between atoms, molecules, and more.
Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.87 × 10⁻³ at a certain temperature. If 5.00 g of solid PH₃BCl₃ and 0.0700 g of BCl₃ are added to a 4.500 L reaction vessel, what will the equilibrium concentration of PH₃ be? SO CONFUSED BE VERY SPECIFIC especially WITH FINDING Qc.
Answers
Answer:
[PH₃(g)] = 0.0432M at equilibrium
Explanation:
Given: PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³
*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.
PH₃BCl₃(s) => BCl₃(g) + PH₃(g
Ci: 5.00g 0.07g 0.00g
*≅1.0M(s) =0.07g/115.81g·mol⁻¹
= 6 x 10⁻⁶ mol
= 6 x 10⁻⁶mol/4.5L
= 1.3 x 10⁻⁴M = 0.00M
ΔC: -x +x +x
Ceq: 1M - x ≅ 1M = (1.3 x 10⁻⁴ + x)M = x
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³
=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³
=> x² + 1.3 x 10⁻⁴·x + 1.87 x 10⁻³ = 0
=> x = -b ± [Sqrt(b² - 4ac)] / 2a
=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)
=> x = 0.0432M in PH₃ at equilibrium
Check:
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)
g (True/false)Sodium borohydride, NaBH4, is a reducing reagent which converts carbonyl to carboxylic acids
Answers
Answer:
False
Explanation:
Sodium borohydride, NaBH4 is a reducing agent. The conversion of a carbonyl to carboxylic acids is an oxidation reaction.
Sodium borohydride, NaBH4 does not perform an oxidation reaction, it is only used for reduction reactions. Hence the statement in the question is false.
a sample contains 4.0x10^25 molecules of hydrogen peroxide (H2O2) how many hydrogen atoms would be in the sample?
Answers
China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D
Answers
Answer: the answer would be A
Explanation:
Answer:
A
Explanation:
What happens when a covalent
substance dissolves in water?
and Why doesn’t it conduct electricity?
Answers
Answer: Covalent compounds form when atoms that have similar electronegativity values form covalent chemical bonds. When a covalent compound dissolves in water, it does not dissociate into ions. Because there are no free electrons or ions in the water (electrolytes) dissolved covalent compounds can't conduct electricity.
Explanation:
dude. g o o g l e.
What best defines a population
Answers
Answer:
A number of organisms in a specific area/place
Explanation:
6.
What volume does 14.0 g of Hydrogen gas (Hz) take up at a temperature of 30°C and a pressure of 120 kPa?
Note: Use Ideal gas law. R=8.31 (kPa x L)/(mol x K)
Answers
Answer:
V = 146.87 L
Explanation:
Given data:
Mass of sample = 14.0 g
Pressure of sample = 120 kpa
Volume of gas = ?
Temperature of gas = 30°C
Solution:
Number of moles of gas:
Number of moles = mass/molar mass
Number of moles = 14.0 g/ 2 g/mol
Number of moles = 7 mol
Pressure of gas:
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 8.31 KPa.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
30+273 = 303 K
by putting values,
120 KPa × V = 7 mol × 8.31 KPa.L/ mol.K × 303 K
V = 17625.51 KPa .L/ 120 KPa
V = 146.87 L
Can anyone help me out with these questions? Thanks!!
Answers
Which of the following situations would cause light to refract?
Answers
When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.
What is refraction ?Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.
The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.
For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.
Find more on refraction:
https://brainly.com/question/29692290
#SPJ6.
The options of your question were as follows:
A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.
After burning your candle for a few hours you and your friend notice that it's mass has decreased. Your friend claims that the mass "disappeared". Why do you know he is wrong (Hint: it's a Scientific Law)? What actually happened to the mass? What form is that mass in now? What is this process called?
Answers
Answer:
The law of conversion of mass is a scientific law that says that mass or matter can not be created or destroyed like energy but changes its form in a different type of state. So, by the law of conversion of mass, you can say that mass is not disappeared but change in different forms of states of matter like gas, soot, or melted residues of candle and ash of thread.
Due to this, the mass of the solid or waxy state due to burning changes to gas released by burning and residue of wax that will be equal to the mass of the original mass.
During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A)
An endothermic reaction
B)
An exothermic reaction
Answers
Answer:
b
Explanation:
Why doesn't glue stick to the inside of the bottle? (Not sure if this is chemistry or not lol)
Answers
Answer:
When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.
What does it mean when someone has done multiple trials? A. They have performed an experiment once and reported their findings. B. They have performed a scientific experiment more than once. C. They have performed an experiment that can only be performed once. D. They have designed an investigation to answer a question.
Answers
A. They have performed an experiment once and reported their findings.
____ describes the quantity of solute that
can dissolve in a given amount of solvent at a
given temperature.
A. Viscosity
B. Solubility
C. Fluidity
D. Permeability
Answers
B. Solubility
Answer:
B
Explanation:
The compound with the molecular formula C4H10 is called
Answers
Answer:
butane
Explanation:
I hope this helps!
Answer:
Butane
...............
What type of reaction is FeS + 2HCl àFeCl2 + H2S?
Answers
Answer: 3 4 a noodles
Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]
The ____ are new substances that are created following a chemical reaction. *
A:chemical reactions
B:products
C:reactants
D:coefficients
Answers
Answer:
b
Explanation:
Convert 3.52 × 10^22 atoms of gold to moles
Answers
Answer:
5.85 x 10⁻² mol Au
Explanation:
Divide the atoms of gold with Avogadro's number to find the solution.
How can you change a objects state of matter
Answers
Answer:
Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.
Explanation:
What is Scientific definition of a compound?
Answers
A substance made up of atoms from two or more elements that are chemically bonded together
Identify the two functional groups that react together to form the ester linkage between monomers in the PET polymer
Answers
Answer:
PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.
In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.
It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.
What will happen to the volume of a gas if the Kelvin temperature of the gas is reduced to 1/4 of the original temperature and the pressure of the gas is halved?
The volume of the gas will be 1/8 of the original volume.
The volume of the gas will remain the same.
The volume of the gas will be 1/6 of the original volume.
The volume of the gas will be half of the original volume.
Answers
Answer:
the volume of the gas will be 1/8 of the original value
Explanation:
The elements fluorine (F), chlorine (Cl), and iodine (I) are all part of the same _________on the periodic table.
Answers
Explanation:
The elements Fluorine (F),Chlorine (Cl) and Iodine (I) are all part of the same Group ( i.e, Group 17 ) on the periodic table.
Answer:
Group
Explanation:
What is and ionic bond and how it forms and why it forms
Answers
The picture shows to containers filled with a gas, both initially at room temperature
AAA
Ice
Heat
Which statement is correct? (5 points)
The gas particles in both containers have the same average kinetic energy because they have equal number of particles
The gas particles in both containers have the same average kinetic energy because they have the same volume
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature
The average kinetic energy of the gas particles is greater in container 8 because its particles move faster
Od
Answers
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
Option D is the correct statement. From the excerpt, it can be seen that container B is being heated. The heat that is applied to container B will make the temperature of the gas to increase, thereby increasing the average kinetic energy. This will cause the gas molecules to mover faster and with force hitting the walls of the gas container. At this time, pressure should increase. Also, the volume of the gas increases just as the temperature of the gas also increases.
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
In the passage, you read about Dalia Kirschbaum, a geomorphologist. In her work, she uses weather data collected
by NASA satellites to study which events?
Answers
Answer:
Landslides
Explanation:
Answer:
Landslides
Explanation:
Correct on edge
What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61
Answers
Answer:
47 is your correct ans, which is b
Mercury completes one orbit around the Sun in 68 days.
a. True
b. False
Answers
Answer:
true :PP
Explanation: