NEED HELP! ASAP 30 POINTS!!
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Answer:
Explanation:
In ions, protons are never taken or given. Only the number of electrons are changed
Br^1- gains 1 electron, so the number of electrons increases from 35 to 36. No protons are taken away, to the number of protons and the atomic number of Br1- is still 35, and the number of neutrons is still 45.
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If a solid, a liquid, and a gas of a substance are each in separate covered jars, then the amount of kinetic energy of the particles of the substances decreases from solid to liquid to gas.TrueFalse
Propane and oxygen react according to the equation: C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g).How many grams of water can be produced from the complete combustion of 2.0 moles of C₃H₈(g)? a. 144.0 b. 82.0 c. 8.0 d. 44.8 e. 22.4
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How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate is combined with 12.0 g of hydrochloric acid?
Answers
Answer : Yes, the concentrated is a catalyst in this reaction.
Explanation :
Catalyst : It is a substance that increase the rate of chemical reaction but it is not consumed by the reaction. That means catalyst can be recovered chemically at the end of the reaction.
The given balanced chemical reaction is,
From the balanced chemical reaction we conclude that the amount of present in the reactant side are remains same as the amount of
present in the product side. That means the amount of
is not consumed by the reaction and it can be recovered chemically at the end of the reaction.
Hence, yes, concentrated is a catalyst in this reaction.
Answer:
Explanation:
a that the ansawer
Help
Answers
Answer:
Thermohaline Circulation
Explanation:
The process is known as “Thermohaline Circulation”. In the Earth’s polar regions ocean water gets very cold, forming sea ice. As a consequence the surrounding seawater gets saltier, because when sea ice forms, the salt is left behind. As the seawater gets saltier, its density increases, and it starts to sink.
Answers
Answer:
56.4 mmHg
Explanation:
Given:
Vapor pressure of the solution, P solution = 55 mmHg
The mass of sucrose (C₆H₁₂O₆) = 10 g
Also, Molar mass of sucrose (C₆H₁₂O₆) = 180 g/mol
So, moles = Given mass/ molar mass
Hence, moles of sucrose in the solution = 10 g / 180 g/mol = 0.05556 mol
Given that: Mass of ethanol = 100 g
Molar mass of ethanol = 46 g/mol
Hence, moles of ethanol = 100 g / 46 g/mol = 2.174 mol
Mole fraction of solvent, ethanol is:
X ethanol = 2.174 mol / (2.174 + 0.05556) mol = 0.975
Applying Raoult's Law
P solution = X ethanol*P° ethanol
=> P° ethanol = P solution / X ethanol = 55 mmHg / 0.975 = 56.4 mm Hg
Explanation:
The given data is as follows.
Vapor pressure of the solution = 55 mm Hg
Mass of sucrose = 10 g
Molar mass of sucrose = 180 g/mol
Therefore, moles of sucrose present into the solution will be calculated as follows.
No. of moles =
=
= 0.055 mol
Mass of ethanol is given as 100 g and its molar mass is 46 g/mol.
Hence, number of moles of ethanol will be calculated as follows.
No. of moles =
=
= 2.174 mol
As mole fraction =
Hence, mole fraction of etahnol will be calculated as follows.
=
=
= 0.975
Now, using Raoult's Law as follows.
=
=
= 56.4 mm Hg
Thus, we can conclude that the vapor pressure of the pure solvent is 56.4 mm Hg.
shininess and ductility
conductivity, malleability, and shininess
ductility, conductivity, and malleability
Answers
Answer: malleability and ductility
Explanation:-
Malleability is the property of metals to be beaten into sheets. Ductility is the property of metals to be drawn into wires.The delocalized sea of electrons enable the metal atoms to roll over each other when stress is applied and thus they can be converted to sheets or wires.
Shininess of metals is because electrons on the surface can bounce back light at the same frequency as the light hits the surface.
When a wire is connected to a metal, the delocalized electrons are drawn to the positive pole and thus helps in the conduction of electricity.
The metallic properties that are caused by atoms rolling over each other in metallic bonds are malleability and ductility.the atoms that are being rolled over are delocalized electrons in the sea of electrons in the metallic bond enable them to roll over when stress is applied.
b. exposure to toxic chemicals
c. the net charge of the atom
d. the attraction of protons to electrons
e. an unstable ratio of protons and neutrons
Answers
The answer is: e. an unstable ratio of protons and neutrons.
Neutrons stabilize the nucleus, because they attract protons and reduce electrical repulsion between protons.
The larger is neutron-proton ratio, the higher is probability for nuclear decay.
Ratio of protons to neutrons in a stable atom is 1 : 1.
For example, nitrogen atom (N-14) has 7 protons (p⁺) and 7 neutrons (n°). The neutron–proton ratio (N/Z ratio or nuclear ratio) is 7 : 7 ( 1 : 1 ).
Another example, neon atom (Ne-20) has 10 protons (p⁺) and 10 neutrons (n°). The neutron–proton ratio is 10 : 10 ( 1 : 1 ).
The neutron–proton ratio generally increases with increasing atomic number.
B. saponification
C. ionization
D. neutralization
Answers
Answer: D. neutralization
Explanation:
1. Substitution reaction is defined as the reaction in which one atom replaces the other atom from the compound.
2. Saponification is a reaction in which fatty acids are made to react with alkalis to form sodium salt of fatty acids called as soaps.
3. Ionization is a type of chemical reaction in which a substance ionizes when dissolved in water.
4. Neutralization is a type of chemical reaction in which an acid reacts with base to produce salt and water.