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3 years ago

Identify the following examples as either physical or chemical change.

Chemistry

1 answer:

Natalka [10]3 years ago

6 0

Answer:

19. Physical

20. Physical

21. Chemical

22. Physical

23. Chemical

24. Chemical

25. Physical

Explanation:

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Why was it so important that the scientist investigating the atom be young and unattached to existing scientific thinking

tatiyna

Answer:

so they can find the aswer and not get hurt

Explanation:

7 0

3 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

8 0

3 years ago

Consider the reaction H2(g) + Cl2(g) <=> 2 HCl(g), which is exothermic as written. What would be the effect on the equilib

kirill115 [55]

Answer:

No effect

Explanation:

H2(g) + Cl2(g) <=> 2HCl(g)

Decreasing the volume of the re simply means increasing the pressure. As we can see from the above equation, the total number of moles of the reactants and products are the same. There decreasing the volume ( i.e increaing the pressure) will have no effect on the system and hence the equilibrium position is not affected.

4 0

4 years ago

Read 2 more answers

Identify and name the functional group present CH4

Mashcka [7]

Methane has the alkane functional group, so the name is composed of meth- for the carbon chain, and –ane for the alkane functional group

5 0

3 years ago

Que pasa si a una taza de arena le pongo espuma y lo agito por 10 minutos?

Nonamiya [84]

Answer:

Conversion of energy

Explanation:

Shaking the sand is a form of kinetic energy. The friction of the sand particles rubbing against each other converts the kinetic energy to heat energy. Some of the kinetic energy also converts into the energy of sound waves, which you can hear while you shake the sand.

7 0

3 years ago