All categories

4 years ago

How would one know if something is an element?

2 answers:

7 0

An element is a substance made from only 1 type of atom. It is a pure substance and they are the building blocks for the rest of matter in the world.

hichkok12 [17]4 years ago

6 0

You would be able to tell if you could see it on the period table ig.

You might be interested in

Suppose a 0.025M aqueous solution of sulfuric acid (H2SO4) is prepared. Calculate the equilibrium molarity of SO4−2. You'll find

FromTheMoon [43]

Answer: The concentration of $SO_4^{2-}$ at equilibrium is 0.00608 M

Explanation:

As, sulfuric acid is a strong acid. So, its first dissociation will easily be done as the first dissociation constant is higher than the second dissociation constant.

In the second dissociation, the ions will remain in equilibrium.

We are given:

Concentration of sulfuric acid = 0.025 M

Equation for the first dissociation of sulfuric acid:

$H_2SO_4(aq.)\rightarrow H^+(aq.)+HSO_4^-(aq.)$

0.025 0.025 0.025

Equation for the second dissociation of sulfuric acid:

$HSO_4^-(aq.)\rightarrow H^+(aq.)+SO_4^{2-}(aq.)$

Initial: 0.025 0.025

At eqllm: 0.025-x 0.025+x x

The expression of second equilibrium constant equation follows:

$Ka_2=\frac{[H^+][SO_4^{2-}]}{[HSO_4^-]}$

We know that:

$Ka_2\text{ for }H_2SO_4=0.01$

Putting values in above equation, we get:

$0.01=\frac{(0.025+x)\times x}{(0.025-x)}\\\\x=-0.0411,0.00608$

Neglecting the negative value of 'x', because concentration cannot be negative.

So, equilibrium concentration of sulfate ion = x = 0.00608 M

Hence, the concentration of $SO_4^{2-}$ at equilibrium is 0.00608 M

4 0

3 years ago

What Happens When Stress builds faults? O Energy is Absorbed O Rock can bend and break O Plates form on the lithosphere O Earthq

Bumek [7]

It decease during time period

8 0

3 years ago

Read 2 more answers

How do I write 0.03438 m in scientific notation using 3 digits?

Law Incorporation [45]

3.44x10^2
you move the decimal over to get a single digit number with change. The number of times you move the decimal is the number for the 10 power

4 0

3 years ago

1.) Which line is pointing to the axon terminals?

Naily [24]

Answer:

1.) 5 or D

2.) 2 or B

3.) 4 or D

4.) 1 or A

Explanation:

I got them correct on the quiz on edge

4 0

2 years ago

Energy from the Sun reaches Earth through

g100num [7]

Solar Radiation(Basically Radiation)

8 0

3 years ago

Read 2 more answers