3 years ago

Whats 9x2 im new to madh

Chemistry

1 answer:

igomit [66]3 years ago

3 0

It’s 18 hopefully Math gets easier for you

You might be interested in

The equation for the formation of water from hydrogen gas and oxygen gas is 2H2 +

Scilla [17]

Answer:

72g

Explanation:

3 0

3 years ago

Crude oil is a mixture of many liquids. The crude oil enters the bottom of a tall column, where the mixture is heated. The subst

Yanka [14]

Boiling point ..................................................

7 0

3 years ago

Read 2 more answers

In what situations are van der waals forces the most significant

viktelen [127]

Its most significant when all other forces are absent

7 0

3 years ago

Which of the following describes a double bond between two carbon atoms?

BlackZzzverrR [31]

Im pretty sure the answer is 4 but not 100 percent

5 0

3 years ago

Read 2 more answers

The combustion of ethene in the presence of excess oxygen yields carbon dioxide and water: c2h4 (g) + 3o2 (g) → 2co2 (g) + 2h2o

meriva

Answer:

$\boxed{-267.5}$

Explanation:

You can calculate the entropy change of a reaction by using the standard molar entropies of reactants and products.

The formula is

$\Delta_{r} S^{\circ} = \sum_n {nS_{\text{products}}^{\circ} - \sum_{m} {mS_{\text{reactants}}^{\circ}}}$

The equation for the reaction is

C₂H₄(g) + 3O₂(g) ⟶ 2CO₂(g) + 2H₂O(ℓ)

ΔS°/J·K⁻¹mol⁻¹ 219.5 205.0 213.6 69.9

$\Delta_{r} S^{\circ} = (2\times213.6 + 2\times69.9) - (1\times219.5 + 3\times205.0)\\\\= 567.0 - 834.5 = \boxed{-267.5 \text{ J}\cdot\text{K}^{-1} \text{mol}^{-1}}$

3 0

3 years ago