As the activation energy of a reaction decreases, the number of molecules with at least this much energy ______________.

Answers

Answer 1

Answer:

Answer:

Increasing

Explanation:

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Which of the following elements is NOT a transition metal?a. Copper
c. Sodium
b. Chromium
d. Iron

Answers

This answer is Sodium

D. Iron .. im not sure

What is the IUPAC name for the compound ZnO?(1) zinc oxide (2) zinc oxalate(3) zinc peroxide (4) zinc hydroxide

Answers

The correct answer is option 1. THe IUPAC name for the compound ZnO is zinc oxide. It is an inorganic compound that is a white powder, insoluble in water and widely used as an additive in many materials and products. Most common application is as a skin cream.

In a 0.01 M solution of HCl, Litmus will be

Answers

In a 0.01 M solution of HCl, Litmus will be red. Litmus paper will turn into red in acidic conditions. Hydrochloric acid is an acid. Litmus is an indicator for acidity and alkalinity made from inchens.

Explanation:

A solution with pH less than 7 will be acidic in nature and it will change color of blue litmus into red.

For example, HCl is a strong acid as it dissociates to give hydrogen ions and chlorine ions.

A solution with pH more than 7 will be basic in nature and it will change color of red litmus into blue.

A solution with pH equal to 7 will be neutral in nature and it will not change the color any litmus paper.

Thus, we can conclude that in a 0.01 M solution of HCl, litmus will be red.

Describe the characteristics of compounds and explain how compounds are named

Answers

componds ares used to make another sentence along with another sentence . The are named as fanboys
for ,and, nor ,but ,or ,yet ,so

During a flame test, ions of a specific metal are heated in the flame of agas burner. A characteristic color of light is emitted by these ions inthe flame when the electrons(1) gain energy as they return to lower energy levels(2) gain energy as they move to higher energy levels(3) emit energy as they return to lower energy levels(4) emit energy as they move to higher energy levels

Answers

The flames being emitted by the ions are as a result of ions 3. emitting energy as they return to lower energy levels.

When ions are heated:

They absorb energy
They are able to move around

As they move around, they expend some of that energy and lose it as a result thereby returning to lower energy levels. As that energy is lost, it comes across as light being emitted by the ions.

In conclusion, ions in the flame test emit light as they lose energy and return to a lower energy level.

Find out more at brainly.com/question/6357832.

Answer;

-Emit energy as they return to lower energy levels.

Explanation;

-A characteristic color of light is emitted by these ions in the flame when the electrons emit energy as they return to lower energy levels.

-The metal ions do absorb energy, and the electrons are boosted to higher energy levels, but they emit that energy as they fall to lower levels, and it is the photons of light they are emitting that can be seen.

A) How many moles of gold atoms are present in a 295-gram sample of gold? B) How many gold atoms would there be in the sample?

Answers

The molar mass of gold, Au, as seen on the periodic table, is 196.97 grams per mole. So, do this to find the number of moles in a 295 gram sample:

$(295g\ Au)((1mol\ Au)/(196.97g\ Au)) = 1.49769mol\ Au$

So, a 295 gram sample of gold has about 1.5 moles of gold in it.

To find the number of atoms, multiply the number of moles by Avogadro's number:

$(1.49769mol\ Au)((6.022*10^(23)\ atoms)/(mol)) = 9.02 * 10^(23)\ atoms\ Au$

5 gram of 197 Au contain 1.53*10^22 atoms. so just multiply that with 59 to get 295 grams :)

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