Answer: There are [tex]12.71 \times 10^{-9}[/tex] moles present in [tex]2.11 \times 10^{14}[/tex] molecules of LiBr.
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of a substance.
Hence, moles in [tex]2.11 \times 10^{14}[/tex] molecules of LiBr are calculated as follows.
[tex]Moles = \frac{2.11 \times 10^{14}}{6.022 \times 10^{23}}\\= 12.71 \times 10^{-9}[/tex]
Thus, we can conclude that there are [tex]12.71 \times 10^{-9}[/tex] moles present in [tex]2.11 \times 10^{14}[/tex] molecules of LiBr.
What is the concentration of a solution made by combining 52 grams of NaCH3COO with 150 mL of water?
Answer: The concentration of a solution made by combining 52 grams of [tex]NaCH_{3}COO^{-}[/tex] with 150 mL of water is 4.22 M.
Explanation:
Given: Mass = 52 grams
Volume = 150 mL (1 mL = 0.001 L) = 0.150 L
Molarity is the number of moles of a substance present in liter of a solution.
And, moles is the mass of a substance divided by its molar mass.
Hence, moles of [tex]NaCH_{3}COO^{-}[/tex] (molar mass = 82.034 g/mol) is as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{52 g}{82.034 g/mol}\\= 0.633 mol[/tex]
Therefore, concentration of given solution is as follows.
[tex]Molarity = \frac{moles}{Volume(in L)}\\= \frac{0.633 mol}{0.150 L}\\= 4.22 M[/tex]
Thus, we can conclude that the concentration of a solution made by combining 52 grams of [tex]NaCH_{3}COO^{-}[/tex] with 150 mL of water is 4.22 M.
CH4 + O2 → CO2 + H2O what is the balacnced chemical reaction
Answer:
The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants
What unit is used for atomic mass
The bond between which two atoms is most polar
H-O
C-H
F-H
F-F
Which substance is a binary acid?
hydrochloric acid
phosphoric acid
nitrous acid
sulfuric acid
Answer:
A) Hyrdrochloric Acid
Explanation:
This is because binary acids are molecular compounds in which hydrogen is combined with a non-metal element. Hydrochloric acid has hydrogen present in it's compound, therefore identifying it as the only binary acid amongst the answer choices.
What type of reaction happens inside a nuclear power plant?
A. A chemical reaction
B. A photoelectric reaction
C. A nuclear chain reaction
D. An acid-base reaction
Why would the electrolysis reaction stop if the battery was removed
If the battery was removed, the energy produced by the battery would not be able to continue its path along the circuit.
what two factors affect the pressure in a solid
There are four main factors that can affect the reaction rate of a chemical reaction:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
please make me brainlist answer
In relation to the reactants of a chemical reaction, the products are
Answer:
the products are the substances made after the chemical reaction has happened
Explanation:
238 U 92 write the following decay sequence.
Answer: The given decay sequence is [tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex].
Explanation:
An alpha-particle is a helium atom. Hence, when an alpha decay occurs in [tex]^{238}_{92}U[/tex] then the reaction equation is as follows.
[tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He[/tex]
Now, in sequence the equation for beta decay is as follows.
[tex]^{234}_{90}Th \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex]
Hence, the sequence will be as follows.
[tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex]
Thus, we can conclude that the given decay sequence is [tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex].
Balance the equation above please
Answer:
Balanced Equation:-Al2(CO3)3. ---heat---> Al2O3 + 3 CO2
Answer:
everything can be found in the picture
what is formed when oxyhaemoglobin splits
Explanation:
The haem is in turn split into iron , which forms chemical compounds as part of the blood iron pool available for future hemoglobin synthesis...
hope this help !!
Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant? (3 points)
Select one:
a. FeS2
b. Fe2O3
c. O2
d. SO2
If 8 moles of FeS2 react with 15 moles of O2, the limiting reactant is O2.
WHAT IS LIMITING REACTANT:A limiting reactant is reactant that is totally consumed when the chemical reaction is completed.According to this question, the following reaction was given: 4FeS2 + 11O2 → 2Fe2O3 + 8SO2.4 moles of FeS₂ reacts with 11 moles of O₂
This means, 8 moles of FeS₂ will react with (8 × 11/2) = 22 moles of O₂15 moles of O₂ is available. In comparison with 22 moles, O₂ is in short supply .
Therefore, If 8 moles of FeS2 react with 15 moles of O2, O₂ is the limiting reagent.
Learn more about limiting reactant at: https://brainly.com/question/14225536
Answer:
They are right it's O2
Explanation:
I accidently rated it low but it's 100% right
What is the SI unit of mass
Answer:
kg or kilograms
Explanation:
Answer: Kilogram (kg)
Explanation: The SI unit of mass is the kilogram (kg). It is equal to the mass of the international prototype of the kilogram and it is defined as the mass of platinum-iridum (Pt-Ir).
Why is it important for scientist to be repeatable?
Answer:
It is important for scientists to be repeatable so it lets them see patterns and trends in their results. This is affirmative for their work, making it stronger and better able to support their claims. This helps maintain The integrity of data.
Repeating an experiment more than once helps determine if the data was a fluke, or represents the normal case. It helps guard against jumping to conclusions without enough evidence. The number of repeats depends on many factors, including the spread of the data and the availability of resources
Explanation:
A student wrote a chemical equation as shown.
2H₂S+ 302 H₂O + SO₂
What should the student do to balance the equation?
Answer: The student must add 2 infront of both [tex]H_2O[/tex] and [tex]SO_2[/tex] to make the equation balanced.
Explanation:
A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.
For the given unbalanced chemical equation:
[tex]2H_2S+3O_2\rightarrow H_2O+SO_2[/tex]
On the reactant side:
Atoms of H = 4
Atoms of S = 2
Atoms of O = 6
On the product side:
Atoms of H = 2
Atoms of S = 1
Atoms of O = 3
To balance the equation, a student must balance the atoms by adding 2 infront of both [tex]H_2O[/tex] and [tex]SO_2[/tex]
For the balanced chemical equation:
[tex]2H_2S+3O_2\rightarrow 2H_2O+2SO_2[/tex]
¿Cual es la sustancia que puede causar la muerte? (Estoy poniendo cualquier cosa para registrarme) 3
Answer:
Veneno.
Explicación:
El veneno es la sustancia que puede causar la muerte porque el veneno destruye las células que entran en contacto con el veneno. Si el veneno causa menos daño por lo que no ocurre la muerte del paciente mientras que por otro lado, si el veneno entra en contacto con los órganos vitales y causa más destrucción, el paciente eventualmente morirá, por lo que podemos decir que las sustancias tóxicas y venenosas causan daño y muerte. de la gente.
What type of substance is octane?
Answer:
don't know
Explanation:
Thanks❤ have a nice day
Answer:
Liquid
Explanation:
Octane is a straight chain alkane composed of 8 carbon atoms. It has a role as a xenobiotic. N-octane is a colorless liquid with an odor of gasoline.
Using the following balanced equation, if you had 48 molecules of O2,
how many molecules of SO3 would you produce?
S8 + 12O2 --> 8SO3
Explanation:
hope this helps u understand:)
A compound being used in experimental medicine is 78.14% boron (B) and 21.86% hydrogen (H). The empirical formula of the compound will have a boron to hydrogen ratio of
Explanation:
hope the picture above help u understand :)
Fill in the coefficients that will balance the following reaction:
Which of the following statements regarding carbon is false? Group of answer choices Carbon has the capacity to form single and double bonds. Carbon has the ability to bond with up to six other atoms. Carbon has a tendency to form covalent bonds. Carbon has the ability to bond together to form extensive branched or unbranched "carbon skeletons."
Answer: The statement, carbon has the ability to bond with up to six other atoms is false.
Explanation:
Carbon is a group 14 element and it is a non-metal. The atomic number of carbon is 6 and its electronic distribution is 2, 4.
This means that there are 4 valence electrons present in it. Also, in order to attain stability a carbon atom forms only covalent bonds, that is, it shares its valence electrons with its own atoms or atoms of other elements.
Carbon has the capacity to form single and double bonds.
As valency of carbon is four so it can only combine to 4 other atoms vis single bond and it cannot bond with up to six other atoms.
Carbon shows the property of catenation, that is, it forms covalent bonds with its own atoms in a large number. So, carbon has the ability to bond together to form extensive branched or unbranched "carbon skeletons".
Thus, we can conclude that the statement, carbon has the ability to bond with up to six other atoms is false.
What is created when electrons become detached from their local atom?'
a) An Atom
b) Cation
c) Anion
d) Delocalized electrons
Answer:
B. Cation
Explanation:
As an electron is removed from the atom it is then converted into a positively charged ion known as a Cation.
Hope this helps u
help chemistry pls answer
Example of POTENTIAL ENERGY:
and
Example of KINETIC ENERGY:
the rows from left to right in the periodic table is called what
Answer:
The periodic table has rows that go left to right and columns that go up and down, just like any other grid. The rows are referred to as PERIODS, while the columns are referred to as GROUPS.
Explanation:
ASAAAP HURRRY PLS!!!
Where in aerobic respiration is the largest amount of energy produced?
A)
At the beginning of the cycle, when glucose is oxidized to pyruvate.
B)
At the end of the electron transport chain, when oxygen is reduced.
C)
At the end of the electron-transport chain, when oxygen is oxidized.
D)
At the beginning of the electron transport chain, when oxygen is oxidized.
Determine which statement is true. A) Electrons travel around the nucleus in circular orbits. B) The Bohr atom is the model currently accepted for electrons in atoms. C) An electron's position and energy (momentum) can be know with certainty simultaneously. D) Currently, scientists know the energies of electrons but only approximate areas (orbitals) where the electrons are probably located.
Answer:
A. True
B. True
C. False
D. False
Explanation:
Electrons travel around the nucleus in circular orbits and moves from one orbit to another orbit when they absorb energy or lose energy. The Bohr atom is the model currently accepted for electrons in atoms because this model provides the right information about presence of electrons around the orbits. Scientists know the energies of electrons as well as the areas (orbitals) where the electrons are probably located with the help of new technology.
Answer:d
Explanationusa test prep
Because of heredity, members of the same species do not have the same traits.
True or false
Answer:
false
Explanation:
use the rapid quark for a explain
Identify all of the gas law equations that relate to the ideal gas law.
**Check for the proof photo at the bottom.**
**Answers are in bold.**
__________________________________________________________
Answers on the left:Identify all of the gas law equations that relate to the ideal gas law.
3. V₁/T₁=V₂/T₂
4. V₁/n₁=V₂/n₂
5. P₁V₁=P₂V₂
7. P₁/T₁=P₂/T₂
__________________________________________________________
Answers on the right:A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L. Answer the questions and round answers to nearest hundredth place. Which equation should you use to find the amount of gas added?
B. n₂=V₂n₁/V₁
What is the final number of moles?
0.08 mol
__________________________________________________________
Explanation:The ideal gas law is Boyle's law, Charles's law, Gay-Lussac's law, and Avogadro's law combined into one equation. Avogadro's law is V₁/N₁=V₂/N₂, Charles's law is V₁/T₁=V₂/T₂, Gay-Lussac's law is P₁/T₁=P₂/T₂, and Boyle's law is P₁V₁=P₂V₂.
For the balloon problem, B is the correct answer because we are looking for the final moles of gas added. Answer B gives the equation that equals n₂, n₂ means final number of moles. The problem gives us initial volume (500 mL), final volume (1 L), and initial moles amount (0.04 mol). Plug these numbers into the equation, n₂=V₂n₁/V₁, using consistent units. Note that V₁=initial volume, V₂=final volume, n₁=initial moles, and n₂=final moles
Here's a photo of Edge just incase.