Data Given:
Pressure = P = 2.5 kPa = 0.02467 atm
Temperature = T = 157 °C + 273.15 = 430.15 K
Volume = V = ?
Mass = m = 10 g
First find out moles for given amount of Argon gas,
As,
Moles = Mass / M.mass
Putting values,
Moles = 10 g / 39.94 g/mol = 0.250 moles
Now using Ideal Gas Equation,
P V = n R T
Solving for V,
V = n R T / P
Putting Values,
V = (0.25 mol × 0.0821 L.atm.mol⁻¹.K⁻¹ × 430.15 K) ÷ 0.02467 atm
Volume = 357.87 L
1.) In 4 Copper atoms, you will have 116 electrons.
2.) You can make 3 Copper atoms out of 87 protons.
C is the correct answer
both metals and non-metals
like Boron(B) and Silicon(Si)
good luck
Question:
The options are;
a. 10. mL of 1 M HCl(aq) at 10.oC
b. 10. mL of 1 M HCl(aq) at 25oC
c. 10. mL of 3 M HCl(aq) at 10.oC
d. 10. mL of 3 M HCl(aq) at 25oC
Answer:
The correct option is;
d. 10 mL of 3 M HCl(aq) at 25 °C
Explanation:
Factors that influence the rate of the reaction include;
Concentration and
Temperature
Concentration
An increase in concentration leads to a increased number of interaction among the the reacting components of HCl and iron filings such that the number of effective interaction or the rate of the reaction increases, therefore, a 10 mL 3 M HCl will react faster than a 10 mL of 1 M HCl.
Temperature
When the temperature of the reacting HCl is increased, the energy within the reacting system increases leading to an increase in the number of high energy collisions which results in an increased reaction rate, therefore, HCl at 25 °C will react faster than HCl at 10 °C.
Hence the correct option is 10 mL of 3 M HCl(aq) at 25 °C.