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3 years ago

I need help. Please help me on the question

Chemistry

1 answer:

horsena [70]3 years ago

5 0

Th answer is A. Hormones are chemical receptors and the x structure is taking it to the nucleus

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Calculate the standard cell emf for the reaction: ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l) Pt is used as an inert elec

Rama09 [41]

Answer: The standard EMF of the cell is 1.11 V

Explanation:

For the given chemical equation:

$ClO_3^-(aq)+3Cu(s)+6H^+(aq.)\rightarrow Cl^-(aq.)+3Cu^{2+}(aq.)+3H_2O(l)$

The half reaction follows:

Oxidation half reaction: $Cu(s)\rightarrow Cu^{2+}+2e^-;E^o_{Cu^{2+}/Cu}=0.34V$ ( × 3)

Reduction half reaction: $ClO_3^-(aq.)+6H^+(aq.)+6e^-\rightarrow Cl^-(aq.)+3H_2O(l);E^o=1.45V$

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

Calculating the $E^o_{cell}$ using above equation, we get:

$E^o_{cell}=1.45-0.34=1.11V$

Hence, the standard EMF of the cell is 1.11 V

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3 years ago

What is the mass of 3.01 X 1023 atoms of iron? (atomic mass of Fe=56)

anyanavicka [17]

84280/3011 or 27.9907g Fe

Explanation:

(3.01 * 10^23)/1 x 1 mol Fe/(6.022 * 10^23) x 56g Fe/ 1 mol Fe = 27.9907 g Fe

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3 years ago

Reacting molecules or ions in a solution at room temperature are in constant motion and collide. some collisions lead to a forma

Lynna [10]

A chemical reaction occurs only when the collision between the reacting molecules takes place. However, not all the collisions are efficient in making the reaction. The products are produced only when the molecules colliding exhibits a certain kind of minimum energy known as threshold energy.

The threshold energy refers to the least amount of energy needed for the reactants to collide effectively, and to produce the activated complex. It is kinetic energy in supplementation with the energy of activation. Hence, threshold energy is more in comparison to the activation energy.

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You are given a glass which was almost filled with ice water in the lab to observe.

Ira Lisetskai [31]

You would witness h2o in its solid and liquid phases.

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Convert a volume of 2250cm3 to cubic meters

Taya2010 [7]

2250cm3= 2250/1000000m3=.00225m3

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