Concentration of the reactant,pressure,surface
area of the reactant and temperatur
Answer:
Explanation:
Lewis dot structures represent the symbol of an atom we're looking at and the number of valence electrons it has. This number is represented by the sum of dots around the symbol.
- Potassium is in group 1A, this means it only has one valence electron, so we draw K with one dot in its Lewis diagram;
- Argon is in group 8A, this means it has eight valence electrons, so we draw Ar with 8 dots around it in its Lewis diagram;
- Silicon is in group 4A, this means it has four valence electrons, so we draw Si with 4 dots around it in its Lewis diagram;
- Arsenic is in group 5A, this means it has five valence electrons, so we draw As with 5 dots around it in its Lewis diagram.
Those are represented in the image attached below:
but heres a way to solve it
An athlete takes a deep breath, inhaling 1.85 L of air at 21°C and 754 mm Hg.
T
How many moles of air are in the breath? How many molecules?
Gas constant, R= 8.314 J mol ¹ K-1
PV = nRT
PV
RT
h=
=
P
= 0.08206 L atm mol-1 K-1
= 62.36 L Torr mol-1 K-1 -
1 atm = 760 mm Hg = 760 Torr
754 Forr 1.85€
6236 Jerr 294K
Answer:
1.5x10²² particulates
Explanation:
Assuming ideal behaviour, we can solve this problem by using the <em>PV=nRT </em>formula, where:
- V = 250 mL ⇒ 250 / 1000 = 0.250 L
- R = 0.082 atm·L·mol⁻¹·K⁻¹
- T = 15 °C ⇒ 15 + 273 = 288 K
We <u>input the given data</u>:
- 2.4 atm * 0.250 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 288 K
And <u>solve for n</u>:
Finally we <u>calculate how many particulates are there in 0.025 moles</u>, using <em>Avogadro's number</em>:
- 0.025 mol * 6.023x10²³ particulates/mol = 1.5x10²² particulates