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
Answer:
Q1 is A.
Q2 is right
Q3 is D.....I dont
really know about this one
Q4 is right
Answer:
the direct transfer of bacteria,viruses or other germs for one person to another.
Explanation:
sometimes this happens an individual with the bacterium or virus touches.kisses.or cough or sneeze on someone who isn't infected
Answer:
680g of mercury is the mass of the sample of mercury.
Explanation:
Density is an unit used to relates the mass of an object per unit of volume.
For example, in the problem, the density of mercury is 13.6g/cm³, as cm³ is equal to milliliters, mL, the density is: 13.6g/mL.
If you have 50.0mL of mercury, the mass is:
50.0mL * (13.6g / mL) =
<h3>680g of mercury is the mass of the sample of mercury.</h3>
