Some of the physical changes

1 answer:

6 0

when liquid is cooled it gets converted into its solid form. so,in this the condition is being reversed.so it is reversible change. Similarly,liquid when heated it gets converted into its gaseous form. when,gas is cooled,it gets converted into its liquid form

I think answer is B

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If 15 grams of Carbon dioxide is produced in a chemical reaction, how many grams of Carbon must be consumed in the reaction if w

guajiro [1.7K]

Answer:

Quantity of Carbon is 4.09 gm

Explanation:

Equation of carbon reacting with oxygen to give carbon dioxide is given by

C + $O_{2}$ ⇒ C $O_{2}$

One mole of carbon reacts with one mole of Oxygen in this reaction to give One mole of Carbon dioxide.

So, 12 gm of carbon reacts with 32 gm of Oxygen in this reaction to give 44 gm of carbon dioxide.

15 gm of C $O_{2}$ was formed in this reaction

Oxygen used in this reaction = $\frac{15}{44}$ ×32 = 10.91 gm ,

Thus Oxygen is in sufficient quantity in the reaction.

Now,

Carbon that must be used = $\frac{15}{44}$ ×12 = 4.09 gm.

5 0

3 years ago

Calculate the pH at of a 0.10 Msolution of anilinium chloride . Note that aniline is a weak base with a of . Round your answer t

notsponge [240]

The question is incomplete, here is the complete question:

Calculate the pH at of a 0.10 M solution of anilinium chloride $(C_6H_5NH_3Cl)$ . Note that aniline $(C6H5NH2)$ is a weak base with a $pK_b$ of 4.87. Round your answer to 1 decimal place.