All categories

3 years ago

Which process is a chemical change?

Chemistry

1 answer:

dexar [7]3 years ago

6 0

Answer:

Explanation:

1, 2, and 3 are changes in the state of matter. 4 is a chemical reaction because the resulting products are different substances from the first one.

You might be interested in

Differentiate the three pictures and explain them briefly.

Dmitry [639]

Answer:

answer

Cold Front - a zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer.

Warm Front - a transition zone between a mass of warm air and the cold air it is replacing.

Stationary Front - a front between warm and cold air masses that is moving very slowly or not at all.

8 0

3 years ago

Name the following compound: CH3 – CH2 – CH2 – O – CH2 – CH2 – CH2 – CH3

FrozenT [24]

THE COMPOUND IS: ethnoxybutane

4 0

3 years ago

Part a the disproportionation of mn2+(aq) to mn(s) and mno2(s) in acid solution at 25 ∘c. calculate δg∘rxn.

ollegr [7]

Answer:

Δ $G^{o}$ = -461198.3 J

Explanation:

Gibbs free energy is defined as the energy associated with a given chemical reaction which can be used to do work. Firstly, we need to figure out the chemical equation for the given problem. For the given problem, the chemical equation is:

$Mn^{2+} _{(aq)} + 2e^{-}$ ⇒ $Mn_{(s)}$ $E^{o} = -1.18 V$

$Mn^{2+} _{(aq)} + H_{2}O$ ⇒ $MnO_{2(s)} +4H^{+} + 2e^{-}$ $E^{o} = -1.21 V$

The addition of the two $E^{o}$ gives the $E_{cell}$ of the equation, i.e. -1.18-1.21 = -2.39 V.

Then, using the equation for Δ $G^{o}$ , we have:

Δ $G^{o}$ = n*F* $E^{o}$ = 2*96485*-2.39 = -461198.3 J

4 0

4 years ago

Last one i think.......

MatroZZZ [7]

Answer is c i believe

4 0

3 years ago

Read 2 more answers

ClO3− Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show t

Tresset [83]

Answer:

See explanation

Explanation:

The overall charge on ClO3− is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.

This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .

3 0

3 years ago