Answer:
a. 599 cm³
b. 1.49 g/cm³
Explanation:
<h3>A. Volume </h3>
Volume is the amount of space an object occupies. Since this is a brick, the object is a rectangular prism. The formula for the volume of a rectangular prism is the product of length, width, and height.
The brick's length (l) is 13.77 centimeters, the width (w) is 8.50 centimeters, and the height (h) is 5.12 centimeters. Substitute these values into the formula.
Multiply the numbers together.
The original measurements have at least 3 significant figures, so our answer must have 3. For the number we calculated, that is the ones place. The 2 in the tenths place tells us to leave the 9 in the ones place.
<h3>2. Density </h3>
Density is the amount of matter in a specified space. The formula for density is mass over volume.
The mass of the brick is 895.3 grams and we just found the volume to be 599.2704 cubic centimeters. Substitute the values into the formula.
Divide.
Round to three significant figures. For the number we calculated, that is the hundredth place. The 4 in the thousandth place tells us to leave the 9 in the hundredth place.
Helium would be the least I think
Answer:
[CO₂] = [NO] ≈ 0.11 mol/dm³
[CO] = 0.25 mol/(25 L) = 0.01 mol/dm³
[NO₂] = 0.45 mol/(25 L) = 0.018 mol/dm³
Explanation:
The number of moles of CO = 0.25 moles
The number of moles of NO₂ = 0045 moles
The temperature of the vessel = 350°C
The equilibrium constant, Kc = 67.5
We have;
The product of the the concentration of the products = Kc × The product of the concentration of the reactants, therefore;
[CO₂] × [NO] = 67.5 ×(0.25/25 × 0.45/25) = 0.01215
Given that [CO₂] = [NO], we get;
[CO₂] = [NO] = √0.01215 ≈ 0.11 mol/dm³
[CO] = 0.25 mol/(25 L) = 0.01 mol/dm³
[NO₂] = 0.45 mol/(25 L) = 0.018 mol/dm³
I think the answer would be the last option. The difference between the energy transformations in power plants and dams would be that dams are the ones who uses mechanical energy to produce electricity. It uses turbines to convert mechanical to electrical.