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3 years ago

HELP PLEASE Brainliest

Chemistry

2 answers:

scoray [572]3 years ago

6 0

Answer:

answer c

Explanation:

igomit [66]3 years ago

3 0

Answer: B) The trees where peppered moths rest become lighter in color.

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If 13.7 grams of manganese oxide reacts with excess hydrogen chloride gas, how many grams of water are formed?

Lerok [7]

Answer:

5.67 g OF WATER WILL BE FORMED WHEN 13.7 g OF MnO2 REACTS WITH HCl GAS.

Explanation:

EQUATION FOR THE REACTION

Mn02 + 4HCl --------> MnCl2 + Cl2 + 2H2O

From the balanced reaction between manganese oxide and hydrogen chloride gas;

1 mole of MnO2 reacts to form 2 mole of water

At STP, the molecular mass of the sample is equal to the mole of the substance. So therefore:

(55 + 16 * 2) g of MnO2 reacts to form 2 * ( 1 *2 + 16) g of water

(55 + 32) g of MnO2 reacts to form 2 * 18 g of water

87 g of MnO2 reacts to form 36 g of water

If 13.7 g of MnO2 were to be used?

87 g of MnO2 = 36 g of H2O

13.7 g of MnO2 = ( 13.7 * 36 / 87) g of water

= 493.2 / 87 g of water

Mass of water = 5.669 g of water

Approximately 5.67 g of water will be formed when 13.7 g of manganese oxide reacts with excess hydrogen chloride gas.

3 0

3 years ago

What are ionic compounds. Explain. Explain what is gravity.

Sveta_85 [38]

Answer:

hi aria

good morning

Explanation:

Fill the blank honestly

1.Any Nick name for me_____?

2.my special habit_____?

3.if my phone was with u what will u check_____?

4.good thing in me____?

5.bad thing in me_____?

6. Any questions do u want to ask me_____?

7.which color suits me most__?

8.Do u like me(25%,50%,75%,100%)____?

9.who am to u __ ___?

10.any secret do u want to tell me_____?

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6 0

3 years ago

Read 2 more answers

Draw a mechanism for the reaction of methylamine with 2-methylpropanoic acid. Draw any necessary curved arrows. Show the product

Nitella [24]

Answer:

See figure 1

Explanation:

On this case we have a base (methylamine) and an acid (2-methyl propanoic acid). When we have an acid and a base an acid-base reaction will take place, on this specific case we will produce an ammonium carboxylate salt.

Now the question is: ¿These compounds can react by a nucleophile acyl substitution reaction? in other words ¿These compounds can produce an amide? 

Due to the nature of the compounds (base and acid), the nucleophile (methylamine) doesn't have the ability to attack the carbon of the carbonyl group due to his basicity. The methylamine will react with the acid-producing a positive charge on the nitrogen and with this charge, the methylamine loses all his nucleophilicity.

I hope it helps!