Answer:
In order to prepare 200.0 mL of an aqueous solution of iron (III) chloride, at a concentration of 1.25 x 10⁻² M, you need to weight 0.4055 g of FeCl₃ and add to 200.0 mL of water.
Explanation:
Concentration: 1.25 x 10⁻² M
1,25 x 10⁻² mol FeCl₃ ___ 1000 mL
x ___ 200.0 mL
x = 2.5 x 10⁻³ mol FeCl₃
Mass of FeCl₃:
1 mol FeCl₃ _____________ 162.2 g
2.5 x 10⁻³ mol FeCl₃ _______ y
y = 0.4055 g FeCl₃
The gas will occupy 120 L at STP.
We can use the <em>Combined Gas Laws</em>
.
In 1982, chemists redefined <em>STP</em> as <em>1 bar</em> and 0 °C (273.15 K).
<em>p</em>_1 = 5100 mmHg × (1 atm/760 mmHg) × (1.013 bar/1 atm) = 6.798 bar
<em>T</em>_1 = (29 + 273.15) K = 302.15 K
<em>p</em>_1<em>V</em>_1/<em>T</em>_1 = <em>p</em>_2<em>V</em>_2/<em>T</em>_2
<em>V</em>_2 = <em>V</em>_1 × <em>p</em>_1/<em>p</em>_2 × <em>T</em>_2/<em>T</em>_1
= 20.1 L × (6.798 bar/1 bar) × (273.15 K/302.15 K) = 120 L
Answer:
Logs in a fire is an example of something burning, also changing its state of form. I think thats chemical change; going from wood to ashes. And charged batteries means they haven't been used yet or they were just charged, resulting in physical change.
Explanation:
I just learned this in science.
I hope this helps!
All tropical cyclones can produce widespread torrential rains, which cause massive flooding and trigger landslides and debris flows.
