3 years ago

What evidence always shows that a chemical change has happened?

Chemistry

1 answer:

TEA [102]3 years ago

5 0

Answer:

B. A new substance is produced.

Explanation:

In chemical changes, you will always have a new end product from the reactants that were used within the process.

Please mark as brainliest! <3

You might be interested in

A 1.00 L volume of HCl reacted completely with 2.00 L of 1.50 M Ca(OH)2 according to the balanced chemical equation below. 2HCl

wolverine [178]

Answer:

$\boxed{\text{6.00 mol/L}}$

Explanation:

(a) Balanced equation

2HCl + Ca(OH)₂ ⟶ CaCl₂ + 2H₂O

(b) Moles of Ca(OH)₂

$\text{Moles of base} = \text{2.00L} \times \dfrac{\text{1.50 mol}}{\text{1 L}} = \text{3.000 mol base}$

(c) Moles of HCl

$\text{Moles of HCl} = \text{3.000 mol base} \times \dfrac{ \text{2 mol HCl}}{\text{1 mol base}} = \text{6.000 mol HCl}$

(d) Molar concentration of HCl

$\text{Molar concentration} = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{ n }{ V}\\\\c= \dfrac{ \text{6.000 mol}}{ \text{1.000 L}} = \text{6.00 mol/L}$

The molar concentration of the HCl was $\boxed{\textbf{6.00 mol/L}}$

6 0

3 years ago

Read 2 more answers

The force acting between two charged particles A and B is 5.2 * 10È¢ newtons. Charges A and B are 2.4 * 10ÈÆ meters apart. If th

kiruha [24]

A and B r 7.2.5 hope it helps

4 0

3 years ago

Three dimensional scale model of the Earth

Likurg_2 [28]

A globe , a sphere could be used as a three dimensional mode of the earth as well.

6 0

3 years ago

For each image, select the state of matter represented.

kifflom [539]

Answer:

need image

Explanation:

5 0

3 years ago

Why are pennies good for simulating radioactive atoms? Check all that apply

gavmur [86]

Answer:

all of them are correct.

Explanation:

Just took it on e2020

5 0

3 years ago