Answer:
Molarity =5.32 M
Explanation:
Given data:
Mass of glucose = 239 g
Volume = 250 mL (250 /1000 = 0.25 L)
Molarity = ?
Solution;
Formula:
Molarity = number of moles / volume in litter
Number of moles:
Number of moles = mass/ molar mass
Number of moles = 239 g / 180.2 g/mol
Number of moles = 1.33 mol
Molarity:
Molarity = number of moles / volume in litter
Molarity = 1.33 mol / 0.25 L
Molarity =5.32 M
Answer:
\large \boxed{\textbf{609 kJ}}
Explanation:
The formula for the heat absorbed is
q = mCΔT
Data:
m = 2.07 kg
T₁ = 23 °C
T₂ = 191 °C
C = 1.75 J·°C⁻¹g⁻¹
Calculations:
1. Convert kilograms to grams
2.07 kg = 2070 g
2. Calculate ΔT
ΔT = T₂ - T₁ = 191 - 23 = 168 °C
3. Calculate q
![q = \text{2070 g} \times 1.75 \text{ J$^{\circ}$C$^{-1}$g$^{-1}$} \times 168 \,^{\circ}\text{C} = \text{609 000 J} = \textbf{609 kJ}\\\text{The heat energy required is }\large \boxed{\textbf{609 kJ}}](https://tex.z-dn.net/?f=q%20%3D%20%5Ctext%7B2070%20g%7D%20%5Ctimes%201.75%20%5Ctext%7B%20J%24%5E%7B%5Ccirc%7D%24C%24%5E%7B-1%7D%24g%24%5E%7B-1%7D%24%7D%20%5Ctimes%20168%20%5C%2C%5E%7B%5Ccirc%7D%5Ctext%7BC%7D%20%3D%20%5Ctext%7B609%20000%20J%7D%20%3D%20%5Ctextbf%7B609%20kJ%7D%5C%5C%5Ctext%7BThe%20heat%20energy%20required%20is%20%7D%5Clarge%20%5Cboxed%7B%5Ctextbf%7B609%20kJ%7D%7D)
Protons, neutrons..................................
1 density affects the behavior at plate boundaries by how far they are apart from each other.
2 the factors that affect occurs at a plate boundary to make sure they don't collide together.
Answer:
3 Hz
The frequency is three waves per second, or 3 Hz.