3 years ago

This question is about elements, compounds and mixtures.

Chemistry

2 answers:

Ede4ka [16]3 years ago

6 0

Answer:

answer is potasium means k

Free_Kalibri [48]3 years ago

6 0

Answer:

i think potassium

Explaination:

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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

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

lapo4ka [179]

Steps/Answers:

Jot down the metal name.

Write the metal name ending in -idle.

Combine cation, annion names,

Hope This Helps! Have A Nice Day!!

5 0

3 years ago

Acid hydrolase, a digestive enzyme,would most likely be found in what organelle

Artemon [7]

Answer:

Lysosomes

The function of a lysosome is to rid of any unwanted waste. Acid hydrolase aids in that process. Therefore, the acid would make the most sense to be found in lysosomes.

5 0

3 years ago

How do scientists take instruments for measurement up to about 100,000 feet of

uranmaximum [27]

Answer: b
can’t be weather balloons cuz they would pop.
satellites are used for different things
no jet

4 0

2 years ago

How do I convert 125000g to scientific notation?

lakkis [162]

1.25000 multiply by 10^5

4 0

3 years ago