3 years ago

Which is an element?

Chemistry

2 answers:

olga55 [171]3 years ago

4 0

A. Carbon dioxide molecule

Black_prince [1.1K]3 years ago

3 0

Answer:

Explanation:

An element is something on the periodic table by itself.

You might be interested in

From standard reduction potentials, calculate the equilibrium constant at 25 ∘c for the reaction 2mno−4(aq)+10cl−(aq)+16h+(aq)→2

garik1379 [7]

Answer:

$\boxed{\text{57.9}}$

Explanation:

Step 1. Determine the cell potential

E°/V

2MnO₄⁻ + 16H⁺ + 10e⁻ → 2Mn²⁺+ 8H₂O 1.507

10Cl⁻ ⟶ 5Cl₂ + 10e⁻ -1.358 27

2MnO₄⁻ + 10Cl⁻ + 16H⁺⟶ 2Mn²⁺ + 5Cl₂ + 8H₂O 0.149

Step 2. Calculate K

The formula relating K and E is

$E = \dfrac{RT}{nF} \ln K$

E = 0.149 V

R = 8.314 J·K⁻¹mol⁻¹

T = 25 °C = 298.15 K

n = 10

F = 96 485 C/mol

$0.149 = \dfrac{8.314 \times 298.15}{10\times 96 485} \ln K\\\\0.149 = 0.002 570 \ln K\\\\\ln K = \dfrac{0.149}{0.002570} = \textbf{57.9}$

The value of the equilibrium constant is $\boxed{\textbf{57.9}}$

6 0

3 years ago

1. What is half of 1/2 as a fraction?

Julli [10]

0.5/1 is half of 1/2 as a fraction

7 0

3 years ago

Can you list some examples for each of the three domains of bacteria, archaea, and eukarya?

Sedaia [141]

Answer:

hiiiiiiiiiii

Explanation:

5 0

2 years ago

Read 2 more answers

What is the simplest whole-number ratio of atoms in a molecule or formula unit called?

snow_tiger [21]

Answer:

the empirical formula

Explanation:

I remember learning this last year.

5 0

3 years ago

Read 2 more answers

All of the following can increase the rate of chemical reaction EXCEPT:

dangina [55]

Except catalyst because catalyst typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.

5 0

3 years ago