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2 years ago

What did Stephen hawking do that was important

1 answer:

azamat2 years ago

4 0

Hawking was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics.

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Do electromagnets or mechanical waves move faster

PolarNik [594]

Answer:

Electromagnetic Waves

Explanation:

Electromagnetic waves do not need a medium to travel through, so therefore, they are faster.

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2 years ago

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How do you draw acetone using a Bohr model?

Inessa [10]

Explanation:

this is the one i found.....

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2 years ago

What are the 5 principles of kinetic molecular theory?

leva [86]

The kinetic molecular theory of gases is stated in the following four principles: The space between gas molecules is much larger than the molecules themselves. Gas molecules are in constant random motion. The average kinetic energy is determined solely by the temperature.

I got this from my notes from my chemistry class last semester

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2 years ago

In the following net ionic equation, identify each reactant as either a Bronsted-Lowry acid or a Bronsted-Lowry base. HCN(aq) H2

vfiekz [6]

Answer:

Explanation:

The definition of acids and bases by Arrhenius Theory was modified and extended by Bronsted-Lowry.

Bronsted-Lowry defined acid as a molecule or ion which donates a proton while a base is a molecule or ions that accepts the proton. This definition can be extended to include acid -base titrations in non-aqueous solutions.

In this theory, the reaction of an acid with a base constitutes a transfer of a proton from the acid to the base.

From the given information:

$\mathsf{HCN _{(aq)} + H_2O_{(l)} \to CN^{-}_{(aq)} + H_3O_{(aq)}}$

From above:

We will see that HCN releases an H⁺ ion, thus it is a Bronsted-Lowry acid

$H_2O$ accepts the H⁺ ion ,thus it is a Bronsted-Lowry base.

The formula of the reactant that acts as a proton donor is HCN

The formula of the reactant that acts as a proton acceptor is H2O

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2 years ago

17.8g of aluminum sulfate is produced from how many grams of potassium sulfate?

german

Answer:

1 mole of ferric contains 2 moles of iron,and 12 moles of oxygen atoms, and three moles of sulphate ions

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2 years ago