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3 years ago

Which reactions are oxidation-reduction reactions? Check all that apply.

Chemistry

2 answers:

Igoryamba3 years ago

8 0

Answer:

the 1st 3rd and 5th ones

EDGE 2021

Explanation:

BigorU [14]3 years ago

6 0

Answer:

Explanation:

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"what is the oxidation number of phosphorus in h2p3o10?"

slava [35]

Answer:

Oxidation Number of Phosphorous = + 6

Explanation:

According to Rules of Assigning Oxidation States;

i) The Oxidation State of Hydrogen atom in a compound is assigned as +1 except for Hydrides i.e. NaH and MgH₂ where it is assigned with -1.

ii) The Oxidation State of Oxygen in a compound is assigned as -2 except for Peroxides where it is given -1 and OF₂ where it is assigned with +1 respectively.

Oxidation State of P in H₂P₃O₁₀;

As over all molecule is neutral we can write it as,

H₂P₃O₁₀ = 0

Putting oxidation number of H and O,

(+1)₂ + P₃ + (-2)₁₀ = 0

(+2) + P₃ + (-20) = 0

+ 2 + (P)3 -20 = 0

(P)3 = + 20 - 2

(P)3 = + 18

P = + 18 ÷ 3

P = + 6

4 0

3 years ago

In nerve impulse conduction, what happeris after the neurotransmitter is

AURORKA [14]

Answer:

The correct option is;

Action potentials travel the length of the axon

Explanation:

A dendrite are nerve cell projections that are used for receiving signals from other nerve cells

A neurotransmitter is the chemical, produced by the nerve cell to contain the message the nerve cell intends to transmits across a neural junction, to the cell for which the message is meant such as a muscle cell, gland cell, or other nerve cells

Therefore, the received message from the dendrite by the present neuron are transported using action action potential which is the means by which electrical signals are transported by a neuron through the length of the axon which is the projection of the nerve cell, known as the nerve fiber that conducts action potential which are electrical impulses to other destination by traveling the length of the of the axon to the location of the destination cell of the action potential

6 0

3 years ago

Solutions of sulfuric acid and lead(II) acetate react to form solid lead(II) sulfate and a solution of acetic acid. 4.90 g of su

GaryK [48]

Answer:

Mass H2SO4 = 3.42 grams

Mass of lead acetate = 0 grams

Mass PbSO4 = 4.58 grams

Mass of CH3COOH = 1.81 grams

Explanation:

Step 1: Data given

Mass of sulfuric acid = 4.90 grams

Molar mass of sulfuric acid = 98.08 g/mol

Mass of lead acetate = 4.90 grams

Molar mass of lead acetate = 325.29 g/mol

Step 2: The balanced equation

H2SO4 + Pb(C2H3O2)2 → PbSO4 + 2CH3COOH

Step 3: Calculate moles

Moles = mass / molar mass

Moles H2SO4 = 4.90 grams / 98.08 g/mol

Moles H2SO4 = 0.0500 moles

Moles lead acetate = 4.9 grams / 325.29 g/mol

Moles lead acetate = 0.0151 moles

Step 4: Calculate the limiting reactant

For 1 mol H2SO4 we need 1 mol lead acetate to produce 1 mol PbSO4 and 2 moles CH3COOH

The limiting reactant is lead acetate. It will completzly be consumed (0.0151 moles). H2SO4 is in excess. There will react 0.0151 moles. There will remain 0.0500 - 0.0151 = 0.0349 moles

Step 5: Calculate moles of products

For 1 mol H2SO4 we need 1 mol lead acetate to produce 1 mol PbSO4 and 2 moles CH3COOH

For 0.0151 moles lead acetate we'll have 0.0151 moles PbSO4 and 2*0.0151 = 0.0302 moles CH3COOH

Step 6: Calculate mass

Mass = moles * molar mass

Mass H2SO4 = 0.0349 moles * 98.08 g/mol

Mass H2SO4 = 3.42 grams

Mass PbSO4 = 0.0151 moles * 303.26 g/mol

Mass PbSO4 = 4.58 grams

Mass of CH3COOH = 0.0302 moles * 60.05 g/mol

Mass of CH3COOH = 1.81 grams

5 0

4 years ago

Mass in mg salt sugar chalk sand water

STALIN [3.7K]

Its 470mg k dude or dudette

6 0

4 years ago

Describe the atomic theory of atoms. How does this help us understand differences the three states of matter?

postnew [5]

1) Everything is made up of atoms. 2)Atoms are indivisible and also undestroyable. 3) The combination of 2+ different kinds of atoms creates compounds 4) A chemical reaction happens when atoms are rearranged/moved around.

4 0

3 years ago