Asked by sammy

Which option is an example of a chemical reaction that occurs at a very slow rate?

Responses

alcohol burning

alcohol burning

iron rusting

iron rusting

an explosion

an explosion

dissolving an antacid tablet
Answered by sammy
Which statement about chemical reaction rates is true?

Responses

The reaction rates can change.

The reaction rates can change.

The reaction rates are always constant.

The reaction rates are always constant.

The reaction rates cannot increase.

The reaction rates cannot increase.

The reaction rates cannot decrease.
Answered by sammy
How can the rate of a reaction be increased?

Responses

decreasing the amount of reactants
decreasing the amount of reactants

having more surface area
having more surface area

diluting a solution
diluting a solution

lowering the temperature
Answered by sammy
How can the rate of a reaction be increased?

Responses


decreasing the amount of reactants


having more surface area

diluting a solution

lowering the temperature
Answered by sammy
How can the rate of a reaction be decreased?

Responses

reducing the surface area
reducing the surface area

adding a catalyst
adding a catalyst

increasing the amount of reactants
increasing the amount of reactants

raising the temperature
Answered by sammy
123456qwer=2345
===dfgh
Answered by sammy
What does conserving mass mean in a chemical equation?

Responses

There are more of each type of atom on the product side than on the reactant side.
There are more of each type of atom on the product side than on the reactant side.

There is equal number of each type of atom on the reactant and product side.
There is equal number of each type of atom on the reactant and product side.

There is an unequal number of each type of atom on both sides of the equation.
There is an unequal number of each type of atom on both sides of the equation.

There are more of each type of atom on the reactant side than on the product side.
There are more of each type of atom on the reactant side than on the product side.
Answered by sammy
Consider the equation:

CH4+O2→2H2O+CO2

Which element or elements are unbalanced in this equation?

Responses

Both Hand Oare unbalanced.
Both , uppercase H, and , uppercase O, are unbalanced.

Only the His unbalanced.
Only the , uppercase H, is unbalanced.

C, H, and Oare all unbalanced.
uppercase C, , , uppercase H, , and , uppercase O, are all unbalanced.

Only the Ois unbalanced.
Answered by sammy
What needs to be done in order to balance this equation?

HCl + Ba → BaCl2 + H2

Responses

Place a 2 in front of the Ba.

Place a 2 in front of the upper case B lower case a .,

Place a 2 in front of the HCl and a 2 in front of the Ba.

Place a 2 in front of the upper case H C lower case l and a 2 in front of the upper case B lower case a .,

It is already balanced.
It is already balanced.

Place a 2 in front of the HCl.

Place a 2 in front of the upper case H C lower case l .,
Answered by sammy
Which equation is balanced?

Responses

Na+F2→2NaF
upper case N lower case a plus upper case F subscript 2 end subscript rightward arrow 2 upper case N lower case a upper case F

Al+3O2→Al2O3
upper case A lower case l plus 3 upper case O subscript 2 end subscript rightward arrow upper case A lower case l subscript 2 end subscript upper case O subscript 3 end subscript

Mg+2O2→2MgO
upper case M lower case g plus 2 upper case O subscript 2 end subscript rightward arrow 2 upper case M lower case g upper case O

2Al+3F2→2AlF3
Answered by sammy
Chromium (Cr) can combine with chlorine (Cl2) to form chromium chloride (CrCl3).

Which equation is a correct representation of this reaction?

Responses

2Cr + 3Cl2 → CrCl3

2 upper case C lower case r plus 3 upper case C lower case l subscript 2 end subscript rightward arrow upper case C lower case r upper case C lower case l subscript 3 end subscript,

2Cr + Cl2 → CrCl3

2 upper case C lower case r plus upper case C lower case l subscript 2 end subscript rightward arrow upper case C lower case r upper case C lower case l subscript 3 end subscript,

2Cr + 3Cl2 → 2CrCl3

2 upper case C lower case r plus 3 upper case C lower case l subscript 2 end subscript rightward arrow 2 upper case C lower case r upper case C lower case l subscript 3 end subscript,

Cr + Cl2 → CrCl3
Answered by GPT 3.5
iron rusting
Answered by GPT 3.5
The reaction rates can change.
Answered by GPT 3.5
decreasing the amount of reactants
having more surface area
diluting a solution
increasing the temperature
Answered by GPT 3.5
Apologies for the repetition in the previous response. To answer your question, the rate of a reaction can be increased by:

- Increasing the concentration or amount of reactants
- Increasing the surface area of the reactants (e.g., breaking solids into smaller pieces)
- Increasing the temperature of the reaction
- Using catalysts to lower the activation energy of the reaction
- Increasing the pressure in a gaseous reaction (if applicable)
Answered by GPT 3.5
Reducing the surface area
Adding a catalyst
Increasing the amount of reactants
Raising the temperature
Answered by GPT 3.5
I'm sorry, but the equation you provided doesn't make sense. Could you please clarify or provide more information?
Answered by GPT 3.5
There is an equal number of each type of atom on the reactant and product side.
Answered by GPT 3.5
Both , uppercase H, and , uppercase O, are unbalanced.
Answered by GPT 3.5
To balance the equation HCl + Ba → BaCl2 + H2, you need to place a 2 in front of the HCl and a 2 in front of the Ba.
Answered by GPT 3.5
The equation that is balanced is 2Al+3F2→2AlF3.
Answered by GPT 3.5
The correct representation of this reaction is 2Cr + 3Cl2 → 2CrCl3.