All categories

3 years ago

What is a heterogenous mixture?

1 answer:

8 0

Answer: a heterogenous mixture is simply any mixture that is not uniform in composition- its non-uniform mixture of smaller constituent parts

Explanation:

You might be interested in

It is winter, and you want to know where it might snow today. Look at the predicted temperature for each state. Then identify th

Alona [7]

Answer:

reeeeeeeeeeeeeee

Explanation:

reeeeeeeeeeeeeeeeeeeeeee

5 0

3 years ago

7. Which hypothesis about the fate of the universe says that all matter will be torn apart as the dark energy in space keeps acc

sdas [7]

The correct answer is C. The Big Bang

8 0

3 years ago

Salicylic acid (C7H6O3) reacts with acetic anhydride (C4H6O3) to form acetylsalicylic acid (C9H8O4).

zavuch27 [327]

Answer : The correct option is, (B) Salicylic acid

Solution :

First we have to calculate the moles of salicylic acid and acetic anhydride.

$\text{Moles of }C_7H_6O_3=\frac{\text{Mass of }C_7H_6O_3}{\text{Molar mass of }C_7H_6O_3}=\frac{70g}{138.121g/mole}=0.507moles$

$\text{Moles of }C_4H_6O_3=\frac{\text{Mass of }C_4H_6O_3}{\text{Molar mass of }C_4H_6O_3}=\frac{80g}{102.09g/mole}=0.783moles$

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

$2C_7H_6O_3(aq)+C_4H_6O_3(aq)\rightarrow 2C_9H_8O_4(aq)+H_2O(l)$

From the balanced reaction we conclude that

As, 2 moles of salicylic acid react with 1 mole of acetic anhydride

So, 0.507 moles of salicylic acid react with $\frac{0.507}{2}=0.2535$ mole of acetic anhydride

The excess of acetic anhydride = 0.783 - 0.2535 = 0.5295 moles

That means the in the given balanced reaction, salicylic acid is a limiting reagent because it limits the formation of products and acetic anhydride is an excess reagent.

Hence, the limiting reagent is, salicylic acid.

7 0

3 years ago

An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.

dmitriy555 [2]

Answer:

76 protons 76 electrons

Explanation:

The atomic number in a element is equal to the elements protons and electrons. In this case if the atomic number is 76 the number of protons and electrons would also be 76.

Hope this helps.

8 0

2 years ago

a. How can one tell if a chemical reaction is balanced? (.5 point) b. What information does a complete ionic equation give that

evablogger [386]

Answer:

I think it's C

Explanation:

i think its c b3cause when you guess c always feels right

8 0

2 years ago