First, in order to calculate the specific heat capacity of the metal in help in identifying it, we must find the heat absorbed by the calorimeter using:
Energy = mass * specific heat capacity * change in temperature
Q = 250 * 1.035 * (11.08 - 10)
Q = 279.45 cal/g
Next, we use the same formula for the metal as the heat absorbed by the calorimeter is equal to the heal released by the metal.
-279.45 = 50 * c * (11.08 - 45) [minus sign added as energy released]
c = 0.165
The specific heat capacity of the metal is 0.165 cal/gC
1.9%
Explanation:
To find the %H in Ca(C₂H₃O₂)₂, we will express the molar mass of H and the compound as a percentage;
Molar mass of Ca(C₂H₃O₂)₂:
This is the sum of the atomic masses of the elements that makes compound;
Molar mass = 40 + 2[(2 x 12) + (3x 1) + (2 x 16)}
= 40 + 2(59)
= 158g/mol
Molar mass of H = 3(1) = 3g/mol
% H = x 100 = 1.9%
learn more:
Molar mass brainly.com/question/2861244
#learnwithBrainly
Get your free Steam Gift Card Codes at http://steamkeygiveaway.com/ It really works!
Answer:
V₂= 1.9 L
Explanation:
Given data:
Initial volume of gas = 2.20 L
Temperature = 30°C (30+273 = 303 K)
Initial pressure = 735.43 mmHg (735.43 /760 = 0.97 atm)
Final volume of gas = ?
Final temperature = standard = 273 K
Final pressure = standard = 1 atm
Solution:
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 0.97 atm × 2.20 L × 273 K / 303 K × 1 atm
V₂= 582.58 atm .L. K / 303 k.atm
V₂= 1.9 L
Answer:
option c
Explanation:
as catalyst increases the reaction while activation energy is inversely proportional to rate of reaction, so option c is correct