Answer:
0.295 g Co
General Formulas and Concepts:
<u>Chemistry - Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Explanation:
<u>Step 1: Define</u>
3.01 × 10²¹ atoms Co
<u>Step 2: Identify Conversions</u>
Avogadro's Number
Molar Mass of Co - 58.93 g/mol
<u>Step 3: Convert</u>
<u />
= 0.294552 g Co
<u>Step 4: Check</u>
<em>We are given 3 sig figs. Follow sig fig rules and round.</em>
0.294552 g Co ≈ 0.295 g Co
8.1 if I recall quick. Sorry
Answer:At 
food will cook in the pressure cooker set on high.
Explanation:
Standard atmospheric pressure 
= 14.7 Psi = 1.0001 atm (1 Psi=0.06804 atm)
Standard temperature
= 273.15 K
Highest pressure offered by pressure cooker: 12.8 Psi = 0.8709 atm
Pressure (
) inside the pressure cooker on the highest setting at temperature
:
= 1.0001 atm + 0.8709 atm = 1.8710 atm
According to Gay lussac law :
(at constant Volume)
At food will cook in the pressure cooker set on high.
x + y = 100
0.10x + 0.45 y =25
eliminate
x + y = 100
x + 4.5 y = 250
-3.5 y = -150
y = 42.85
x = 57.15
hope this helps
