CHEMISTRY HIGH SCHOOL

What form of energy provides power for a gas stove?A.nuclear energy
B.electrical energy
C.chemical energy
D.sound energy

Can you explain the answer for me ?

Answers

Answer 1
Answer: C . chemical energy will be the answer. In a gas stove, LPG is stored and it is brought out and it reacts with oxygen to give out heat energy. all the other options are not convincing and hence chemical energy is the best answer. 

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This is the equation for the combustion of propane.C3H8 + 5O2 → 3CO2 + 4H2O + heat

Which are the reactants and the products in this reaction?

A.
The reactants are C3H8 (propane) and H2O (water). The products are O2 (oxygen) and CO2 (carbon dioxide).

B.
The reactants are C3H8 (propane) and O2 ( oxygen). The products are CO2 (carbon dioxide) and H2O (water).

C.
The reactants are CO2 (carbon dioxide) and H2O (water). The products are C3H8 (propane) and O2 ( oxygen).

D.
The reactants are O2 (oxygen) and CO2 (carbon dioxide). The products are C3H8 (propane) and H2O (water).

Answers

Answer:

B

Explanation:

Reactants are the compounds which reaction produce the products. In general terms this can be expressed symbolically as follows:

reactants -> products

Other phenomena like heat are omitted because are not always present, that is, only compounds are included. Therefore, in this reaction the reactants are C3H8 (propane) and O2 ( oxygen) and the products are CO2 (carbon dioxide) and H2O (water)

Answer:

\huge \boxed{\mathrm{Option \ B}}

\rule[225]{225}{2}

Explanation:

\sf C_3 H_8 +O_2 \Rightarrow CO_2 + H_2 O

Balancing Carbon atoms on the right side,

\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 + H_2 O

Balancing Hydrogen atoms on the right side,

\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 +4 H_2 O

Balancing Oxygen atoms on the left side,

\sf C_3 H_8 +5O_2 \Rightarrow 3CO_2 +4 H_2 O

The reactants are on the left side of the reaction:

\sf \boxed{\sf C_3 H_8 +O_2} \Rightarrow CO_2 + H_2 O

Propane and oxygen are the reactants.

The products are on the right side of the reaction:

\sf C_3 H_8 +O_2 \Rightarrow \boxed{\sf CO_2 + H_2 O}

Carbon dioxide and water are the products.

\rule[225]{225}{2}

List one extensive and intensive
property of marker ink

Answers

Explanation:

Intensive property: It is the property of substance which is independent of quantity of substance. Color of an ink is an intensive property.

Extensive property: It is the property of substance which depends upon quantity of substance which is just opposite to intensive property. Volume of an ink is an extensive property.
volume is an extensive property of a marker ink and color is an intensive property of a marker ink.

6X, Y and Z are all gases that behave ideally and react according to the equation shown.
X(g) + 2Y(g) → 2Z(9)
When 3.0 mol of X and 3.0 mol of Y are placed inside a container with a volume of 1.0 dmº, they
react to form the maximum amount of Z.
The final temperature of the reaction vessel is 120°C.
What is the final pressure inside the reaction vessel?
А
4.49 x 10 Pa
B
9.80 x 106 Pa
C
1.47 x 10' Pa
D
1.96 x 10' Pa

Answers

Answer:

D

Explanation:

PV=nRT

n=nx + my

n=3mol+3mol

n=6mol

T=120+273=393K

P=nRT/V

P=6×0.0821×393/1

P=193atm

1atm=1.01325×10^5Pa

193atm=xPa

x=1.96×10^7Pa

Yeast lacks of membrane bound nucleus. The onion skin cell has one

Answers

If this is a true or false I would say true... Hope this helps?

What is the correct formula for iron(III) phosphate

Answers

Fe(PO)4 is the written formula

Which two factors must be equal when a chemical reaction reaches equilibrium?(1) the concentration of the reactants and the concentration of the products
(2) the number of reactant particles and the number of product particles
(3) the rate of the forward reaction and the rate of the reverse reaction
(4) the mass of the reactants and the mass of the products

Answers

The correct answer is option 3. Equilibrium is achieved in a chemical reaction when the rate of the forward reaction is the same for the rate of the backward reaction and when the reaction has stopped.
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