Answer:
2.48 × 10⁴ mol
Explanation:
Step 1: Write the balanced equation
2 CrO₄²⁻ + 3 SO₂ + 4 H⁺ ⇒ Cr₂(SO₄)₃ + 2 H₂O
Step 2: Calculate the reacting moles of CrO₄²⁻
3.00 × 10⁸ L of 5.50 × 10⁻² mM CrO₄²⁻ react. The reacting moles are:
3.00 × 10⁸ L × 5.50 × 10⁻² × 10⁻³ mol/L = 1.65 × 10⁴ mol
Step 3: Calculate the reacting moles of SO₂
The molar ratio of CrO₄²⁻ to SO₂ is 2:3. The reacting moles of SO₂ are 3/2 × 1.65 × 10⁴ mol = 2.48 × 10⁴ mol.
The balanced chemical reaction is written as:
<span>Cu +2AgNO3 → Cu(NO3)2 + 2Ag
</span>
We are given the amount of silver nitrate to be used for the reaction. This value will be the starting point of our calculations. It is as follows:
4.00 g AgNO3 ( 1 mol / 169.87 g ) ( 1 mol Cu / 2 mol AgNO3 ) ( 63.456 g / 1 mol ) = 0.747 g Cu
Answer:
Dual nature of matter is an important concept in JEE physics and is basically the study of different nature that a matter possesses or exhibits. ... Hence, the matter is said to possess dual nature, i.e., it has both the properties of a particle and as well as a wave.
<span>How many moles of acetic acid and of sodium acetate are present in 50.0 mL of solution?
We calculate it as follows:
moles of acetic acid = .120 mol/L (.050 L ) = 0.006 mol
moles of sodium acetate = 0.150 mol/L (0.050 L) = 0.008 mol
Hope this answers the question. Have a nice day.</span>
Metals generally lose electrons when they form ions. Therefore, they usually form
"cations" because they are losing negative charges.
Cations are ions that are PAW-sitively charged ions. "meow!" (this trick helped me remember that cations are positive ions. I hope it helps you too!)
