Answers
Answer:
Oxidation takes place at anode
Reduction takes place at cathode
In the equation Zn has changed to Zn2+. This means oxidation number of Zn has increased from 0 to +2. So Zn is oxidised.
In CuSO4 , Cu2+ and SO4 2- ions are present.
Cu2+ has changed to Cu(s) meaning oxidation number of Cu has reduced from +2 to 0. So Copper is reduced.
So Copper rod is the cathode since it has been reduced and Zn rod is the anode because it has been oxidised.
Also electrons always move from anode to cathode so that also shows us Copper is the cathode
Related Questions
can anyone tell me "what are the exceptions of law of reciprocal proportions??"
Answers
Properties of nonmetals include
a.high boiling point.
b.ability to conduct heat.
c.dull appearance.
d.none of the above
Answers
Answer:
c.dull appearance
Explanation:
Nonmetals are dull,poor conductors of heat and electricity that have lower melting points than metals,the rest of the answer choice are properties of metal.
Hope this helps :)
wht will react with acid to giv bluish green salt nd water ??
Answers
Explanation:
When dilute HCl is added to a small amount of copper oxide in a beaker, a greenish-yellow gas is released and a bluish-green solution is formed. Since the metal oxides such as a Copper oxide (CuO) are basic in nature, it reacts with acids such as HCl to form the corresponding salt and water.
A balloon filled with helium gas occupies 800 mL at a temperature of 27°C what would the volume of the balloon be at 132°C
Answers
How do ionic bonds form?
Quick
Answers
Answer:
Explanation: ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.
superscript Coefficient
Me think
What is the mass of 1,300 cm of gasoline? The density of gasoline is 0.67 g/cm.
Answers
Answer:
Volume x Density = Mass of a substance
1300 x 0.67 = 871
The mass is 871 (unit)
Whymilk is taken as mixture
Answers
Explanation:
Main compounds of milk are lactose and casein. And it is also called a colloidal mixture (i.e. in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance). Therefore milk is regarded as a mixture not as a pure substance. So this is the required answer.
Two particles with the same charger will always____each other when brought close together
Answers
9) What is the final pressure in the container shown below after the valve is opened and the gases are allowed
to flow? (The gases do not act)
0
4.00 am
3.00
NE
2.00 am
2.00 L
Answers
A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.
We have 2 containers connected by a valve.
One container has a volume of 3.00 L and contains O₂ at 4.00 atm. The other container has a volume of 2.00 L and contains Ne at 2.00 atm.
When the valve is opened, the total volume is the sum of the 2 containers.
[tex]V_2 = 3.00 L + 2.00 L = 5.00 L[/tex]
Assuming constant temperature and ideal behavior, we can calculate the final pressure of each gas using Boyle's law.
O₂
[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{4.00atm \times 3.00L}{5.00L} = 2.40atm[/tex]
Ne
[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{2.00atm \times 2.00L}{5.00L} = 0.800atm[/tex]
The final pressure in the container will be the sum of the final pressures of the gases.
[tex]P = 2.40 atm + 0.800 atm = 3.20 atm[/tex]
A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.
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in your own words how do plants on Earth affect the amount of carbon in Earth’s atmosphere?
Answers
Answer:
Plants take carbon dioxide out of the atmosphere, but they also have other effects, such as changing the amount of evaporation from the land surface. ... The plants absorb carbon dioxide for photosynthesis through the same pores (called stomata). But when carbon dioxide levels are high, the leaf pores shrink.
Explanation:
Can somebody help me with this please?
Answers
Answer:
So what you want to do is to place sulfur on top with the two fluorine's on the bottom left and right hand side at slight angles. You don't want to make it look interconnected as one whole bond. Draw a single line from each "F" to the "S" to model two fluorine atoms bond to one sulfur atom (Single bond, only one electron is being shared between each).
What is activation energy
Answers
Answer: Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.
Explanation:
as soda gets warm, it goes flat. why? relate this to solubility.
Answers
Answer:
It's because the solubility of gases in water is inversely proportional to the temperature, so it means when the temperature is increased, the solubility decreases, and the gases tend to get out from the soda
There is 200 grams of water on a stove. The water is currently 25 C. How much energy in joules must be used to raise the water to 90 C?
Answers
Answer:
q
=
64 kJ this is answer. .
Which are effects of long-term exposure to mustard gas? Select all that apply. One, some, or all responses may be correct.
Answers
The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.
Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.
Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.
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đơn chất nào sau đây tác dụng với dung dịch axit sunfuric loãng sinh ra khí ?
a đồng
b cacbon
c nhôm
d lưu huỳnh
Answers
Answer:
C. Al
Explanation:
2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2
Which term refers to how close a group of measurements are to each other
Answers
Answer: precision
Explanation: precision is how close the different measurements are to each other and accuracy is how close the measurements are to the true value
NEEEEEDD HELP!CHEMISTRY
Answers
1. H2O
EXPLANATIONA water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds
ADDITIONAL INFORMATIONHow to differentiate between ionic and covalent bonds ?
There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
carbon reduction process is not applied for extraction of alkali metal . why ?
Answers
Answer:
The alkali metals are the highly electropositive metals. Highly electropositive metals cannot be extraction carbon reduction process, because these metals do not react with carbon
Explanation:
One of the few resources on Mars is
Answers
Answer:
iron .. titanium.. nickel....aluminum... sulfur... and calcium
c) ¿Qué ocurriría si tenemos disueltos 200 g de
nitrato de potasio en 300 g de agua a 60°C
y enfriamos la disolución hasta los 10 °C?
Answers
When an organism dies it is exposed to many different types of biotic and abiotic factors biotic factors include?
Answers
Answer:
the organisms themselves,other organisms,interactions between living organisms, and even their waste.
What was the flaw in reasoning that caused Mendeleev to mix up the placement of Ar and K, Co and Ni, and Te and Ni?
Answers
Answer:
Can you explain your question I don't understand
a brief description of atoms and how they relate to
molecules and compounds
Answers
Answer:
Explanation:
Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds
Rheumatoid arthritis is a disorder in which the joints swell and cause pain. Rheumatoid arthritis causes the body’s own immune cells to attack the membrane of the joints. Which body system does rheumatoid arthritis affect?
Answers
Answer:
Immune system
Explanation:
Rheumatoid arthritis is an autoimmune disease. Normally, your immune system helps protect your body from infection and disease. In rheumatoid arthritis, your immune system attacks healthy tissue in your joints. It can also cause medical problems with your heart, lungs, nerves, eyes and skin.
Hund's rule: states that electrons always enter an empty orbital before they pair up.
Answers
Answer:
true
Explanation:
How many grams of hydrogen are needed to fully react 621. 9 grams of nitrogen gas.
Answers
Answer:
9 grams of nitrogen gas
Explanation:
What causes streams to form?
O absorption
O precipitation
O glaciers
O lakes
Answers
Answer: essay the answer is B: precipitation
Explanation:
Please help I will give brainliest ;3
Answers
Answer:
oxygen, carbondioxide
carbondioxide, oxygen
Why is it possible to collect hydrogen gas over water?
