Answers
Answer:
D= .7
C= 1.25
B= 2.2
A= 3.6
Related Questions
What is the formula for pH?
Answers
Answer:
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = - log [H3O+].
Example: Find the pH of a 0.0025 M HCl solution.
4. Write word equations of
Magnesium burns in chlorine to form Magnesium Chloride
Answers
Answer:
Mg(s) + Cl₂ -------> MgCl₂
Explanation:
How may moles are in 88.4 grams of Al(OH)3?
Answers
Answer:
1.133mol Al(OH)3
Explanation:
88.4/78.003 = 1.133
Lyle filled a glass bottle completely with water. He put the lid on tightly, then put the water in the freezer to cool it down quickly. Lyle forgot about his water until the next day. When Lyle took his bottle out of the freezer, all the water was frozen solid. The bottle had cracked in several places and was broken. If water in the ground acts like water in the bottle when it freezes, how does water in the ground affect layers of rock and soil
Answers
Answer:
The answer would be It breaks them up.
Explanation:
Given the balanced equation representing a reaction:
Ni(s) + 2HCl(aq) - NiCl(aq) + H2(9)
In this reaction, each Ni atom
1.
loses 1 electron
2.
loses 2 electrons
لما
gains 1 electron
4
gains 2 electrons
Submit
Answers
Answer: loses 2 electrons
Explanation:
Ni Atom loses 2 electrons , Option 2 is the correct answer.
What is an Electron ?Electron is a subatomic particle (denoted by the symbol e⁻)
or whose electric charge is negative one elementary charge.
Electrons belong to the first generation of the lepton particle family and are generally thought to be elementary particles because they have no known components or substructure.
The electron has a mass that is approximately 1/1836 that of the proton.
Ni(s) + 2HCl(aq) - NiCl(aq) + H₂(g)
This is an oxidation-reduction (redox) reaction:
2 H⁺ + 2 e⁻ → 2 H (reduction)
Ni - 2 e⁻ → Ni ²⁺ (oxidation)
HCl is an oxidizing agent, Ni is a reducing agent.
Therefore Ni Atom loses 2 electrons , Option 2 is the correct answer.
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how does dipping an iron bucket in Molten zinc protect it?
Answers
Answer:
It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.
Explanation:
Answer:
It protects it from corrosion.
Explanation:
Zinc protects iron and steel from the relentless forces of corrosion. Galvanizing iron and steel by dipping them in molten zinc creates an alloy that can, in the right environmental conditions, protect the iron or steel beneath it for 100 years or more.
number 2 ...............
Answers
I hope it’s right ❤️❤️❤️
can someone pleaze help me
Answers
Answer:
I think its the last one
Explanation:
Super sorry if its incorrect.
Helppppppppppppppppppppppppppppppppppppp
Answers
Answer:
0.67moles
Explanation:
The balanced equation of the chemical reaction given in this question is:
N2 + 3H2 → 2NH3
According to this equation, 3 moles of hydrogen gas (H2) produces 2 moles of ammonia gas (NH3)
Therefore, 1 mole of hydrogen gas (H2) will produce;
= 1 × 2/3
= 2/3
= 0.6666
= 0.67moles of ammonia (NH3)
Earth is currently 150 million km away from the Sun. If Earth was 200 million km away from the Sun, why would it no longer be able to support life?
Answers
Answer:
The temperature would be too cold
Explanation:
explain what is meant by an exothermic reaction and write balanced equation for any two exothermic changes
Please do not answer from links
Please answer correctly
Urgent
Answers
[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \red{ \underline{ \large \orange{\tt{ ꧁ A \: N\: S \: W \: E \: R ꧂}}}}[/tex]
✧ [tex] \large{ \red{\tt{E\:X \: O \: T \: H \: E \: R \: M \: I \: C \: \: R \: E \: A \: C \: T\: I \: O \: N}} : }[/tex]
☃ The chemical reaction in which heat is released to the surroundings is called exothermic reaction. The amount of heat energy released is written along with products. This indicates that heat is given out.
[tex] \pink{ \text{Any \: two \: balanced \: equation \: for \: Exothermic \: changes}} : [/tex]
C + O₂ ⇾ CO₂ + HeatCaO + H₂O ⇾ Ca ( OH )₂ + Heatツ Hope I helped! ♡
☂ Have a wonderful day / night ! ☄
[tex] \underbrace{ \overbrace{ \mathfrak{Carry \: On \: Learning}}}[/tex] ✎
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
6) A student measures out 96.21 g of sulfur for an experiment. How many moles of Sulfur are in this
sample? (show your work!)
Answers
Atomic mass of Sulfur = 32g
32g of Sulfur is one mole.
1g of Sulfur is [tex] \frac{1}{32} moles [/tex]
96.21g of Sulfur is [tex] \frac{96.21}{32} moles=> 3moles(appx) [/tex]
Answer:
[tex]\boxed {\boxed {\sf 3 \ moles \ sulfur}}[/tex]
Explanation:
To convert from grams to moles, the molar mass is used. This value is the number of grams in 1 mole of a substance and it can be found on the Periodic Table. Look for Sulfur or S.
Sulfur: 32.07 g/molWe use this as a ratio.
[tex]\frac {32.07 \ g \ S}{1 \ mo;\l\ S }[/tex]
Multiply by the given number of grams.
[tex]96.21 \ g \ S*\frac {32.07 \ g \ S}{1 \ mo\l\ S }[/tex]
Flip the fraction so the grams of sulfur cancel out.
[tex]96.21 \ g \ S*\frac {1 \ mol \ S}{32.07 \ g \ S }[/tex]
[tex]96.21*\frac {1 \ mol \ S}{32.07 }[/tex]
[tex]\frac {96.21 \ mol \ S}{32.07 }= 3 \ mol \ S[/tex]
96.21 grams of sulfur is equal to 3 moles of sulfur.
Predict the shape of the molecule.
Answers
Answer: circle
Explanation:
What is the average speed of a race car if it travelled a total of 500 miles in 3.5 hours
Answers
Answer:
speed = 142.8571 miles per hour OR 142.8571 mi/h
Explanation:
speed= [tex]\frac{distance}{time}[/tex]
distance = 500, time = 3.5hours or 210 minutes
speed= [tex]\frac{500}{210}[/tex] = 142.8571
hope this helps!!!!
PLEASE HELP ME ASAP!!!!!!!!!!!!!
Answers
What is the H+ ion concentration of a solution with a pH of 7?
Answers
Answer:
10-7mol/l
Explanation:
Answer: 10-7mol/l
Explanation:
BRAINS
how do you balance equations?
Answers
Answer:
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal
Explanation:
Answer:
what he said so you can give him brainliest
Explanation:
What is the poh of a solution with a ph of 1.30? PLZZ ANSWER
Answers
Answer:
12.70
Explanation:
The molarity of a solution that contains 28 g KOH (molar mass 56 g/mol) per 250 mL of solution is:
Answers
The solute here is KOH. We have the mass of KOH, and we can calculate the number of moles by dividing by the molar mass: (28 g KOH)/(56 g/mol) = 0.5 mol KOH. The volume of our solution is 0.250 L.
So, the molarity of the solution would be (0.5 mol KOH)/(0.250 L) = 2 mol/L KOH or 2 M KOH.
If a sound wave refracts, what happens to it? Select all that apply.
It changes its speed and wavelength when it bounces off of a solid surface.
B
It changes direction when it passes through an opening
С
It changes its speed and wavelength when it passes through an opening
D
It changes direction when it passes from one medium to another
E
It changes its speed and wavelength from one medium to another.
F
It changes direction when it bounces off of a solid surface.
Answers
If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.
What is refraction of sound wave ?An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.
Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.
If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Sound propagates in all directions from a point source.
Thus, option A, C and D are correct.
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Two charged particles repel each other with a force of F.
How would the magnitude of this force change if the charge on one of the particles was doubled?
- it would decrease to one-fourth of what it was.
- it would decrease to half of what it was.
- it would increase to four times what it was.
- it would increase to twice what it was.
Answers
Answer:
it would increase to twice what it was
A sealed container is heated from 110K to 175K. The gas begins at a volume of 95L, what is the new volume of the gas upon heating?
Answers
V1/T1 = V2/T2
V1 = 95 L
T1 = 110 K
T2 = 175 K
Solve the equation for V2 —> V2 = V1T2/T1
V2 = (95 L)(175 K) / (110 K) = 151 L
Why is it necessary to know the temperature of the reactants and the products of a reaction in order to determine change in the Gibbs free energy of the reaction
Answers
Answer:
Free Energy (G) can either increase or decrease for a reaction when the temperature increases. It depends on the entropy (S) change. The change in a quantity is represented by the Greek letter delta. ... Hence, when the temperature increases the numeric value of the free energy becomes larger.
Explanation:
The change in Gibbs free energy (ΔG) of a chemical reaction depends on the initial and final states of the reactants and products, as well as on the temperature and pressure conditions of the reaction.
What is Gibb's free energy?The Gibbs free energy of a reaction tells us whether a reaction is spontaneous or not under given conditions, with negative ΔG values indicating a spontaneous reaction and positive ΔG values indicating a non-spontaneous reaction.
The temperature of the reactants and products is important in determining the Gibbs free energy change because the Gibbs free energy change is related to the enthalpy change (ΔH) and the entropy change (ΔS) of the reaction through the equation:
ΔG = ΔH - TΔS
where T is the temperature in Kelvin.
Thus, the temperature of the reactants and products must be known in order to calculate the Gibbs free energy change of a reaction accurately.
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Which term describes the molecule shown below?
H-C=C-H
ethyne CxHy
A. Unsaturated alkene
B. Unsaturated alkyne
O C. Saturated alkyne
O D. Saturated alkene
Answers
Answer:
Saturated alkyne
Explanation:
The hydrocarbons are known as the compounds which is made up of only carbon and hydrogen atoms. They may be saturated or unsaturated based on the number of bonds present. The molecule H-C≡C-H is an Unsaturated alkyne. The correct option is B.
The hydrocarbons in which the carbon and hydrogen atoms are connected through double or triple bonds are known as unsaturated hydrocarbons. Here ethyne is an unsaturated hydrocarbon.
Ethyne is an alkyne which have the C-C and C-H atoms connected through triple and single bonds.
Thus ethyne is option B.
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I need help with number 17 pls someone pls ???
Answers
Answer:
can you pls say what subject it is pls and thank u
Explanation:
Answer:
glass cup as it can trap oxygen from getting in and out meaning that the fire can't grow
Convert 544 Calories to Joule
Answers
Answer:
2276.1 Joules
Explanation
One calorie is equal to 4.184 Joules. So, 544 calories will be equal to 544*4.184=2276.1 Joules
multiply the energy value by 4184
2 Na + Cl2 --> 2 NaCl
What is the mole ratio of chlorine to sodium chloride?
Answers
Answer:
1 : 2 ratio
Explanation:
Chlorine has a coefficient of 1, and sodium chloride has a coefficient of 2.
chelp meeee this is science btw but eahhhh
Answers
Answer: KCIO3
Explanation:
The graph shows that it is the lowest at 0 degrees meaning that it has the lowest solubility
Answer:
KOL c
Explanation:
A fire that is burning wood will release water vapor and carbon dioxide
true or false?
Answers
Answer:
true.
Explanation:
can alluminium sulphate or carbonate test the purity of water
Answers
Explanation:
When added to water, aluminum sulfate causes microscopic impurities to clump together into larger and larger particles. These clumps then settle to the bottom of the container and can be filtered out. This makes the water safer to drink
,