Answer:
all these are physical properties except release of heat so it's probably heat energy given off
Answer:
x=34
y=20
Explanation:
let the first number be 'x'
let the second number be 'y'
Equation 1:-
x + y = 54
Equation 2:-
x = y + 14 (Since one exceeds the other by 14)
Substituting Equation 2 in Equation 1:-
(y + 14) + y = 54
=> y + 14 + y = 54
=> 2y + 14 = 54
=> 2y = 54 - 14
=> 2y = 40
=> y = 40/2
=> y = 20
Now in Equation 1:-
x + y = 54
Substituting y=20,
x + 20 = 54
x = 54 - 20
x = 34
Answer:
Number of moles = 0.99 mol
Explanation:
Given data:
Mass of potassium chloride = 74 g
Number of moles of potassium chloride = ?
Solution:
Formula:
<em>Number of moles = mass/molar mass</em>
Molar mass of KCl = 74.6 g/mol
now we will put the values in formula:
Number of moles = mass/molar mass
Number of moles = 74 g/ 74.6 g/mol
Number of moles = 0.99 mol
C. Gravity acting on the edges of plates and convection in the mantle. So you were correct!
Answer: 18 g
Explanation:

The option closest to this is <u>18 g</u>