Answer : The metal is copper.
Explanation :
As we are given that:
Mass of metal = 25 g
Volume of metal = 40.0 mL
Formula used:
Now putting all the given values in this formula, we get:
From this we conclude that the metal is copper whose density is 8.86 g/mL.
Hence, the metal is copper.
Chemical energy is in the Pontential Energy group....Maybe?
A CHEMICAL PROPERTY is a characteristic of matter that describes its ability to change into a different substance. When elements undergo chemical reaction, they experience a breakage in the chemical bonds that hold their particles together, new chemical bonds are then formed; this makes them to become a new substance.
Answer: Option (4) is the correct answer.
Explanation:
Activation energy is the minimum amount of energy required by the reactants to participate in the chemical reaction.
Therefore, reactant molecules whose energy is less than the activation energy are not able to participate in the reaction. Hence, a catalyst lowers the activation energy so that molecules with less energy can also participate in the reaction.
Thus, a catalyst is a specie that increases the reaction rate and has a lower activation energy.
Boyle's law gives the relationship between pressure and volume of gas. It states that for a fixed amount of gas at constant temperature, pressure is inversely proportional to volume of gas.
PV = k
where P - pressure, V - volume and k - constant
P1V1 = P2V2
where parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation.
substituting the values in the equation
0.947 atm x 150.0 mL = 0.987 atm x V
V = 144 mL
therefore new volume is 144 mL
