Answer:
Sorry for the late answer, but it should be A. Carbon's outermost shell can form up to 4 covalent bonds. It's one of the reasons why Carbon is considered an "essential element".
Answer:
Volume of solution = 80.5 mL
Explanation:
Given data:
Molarity of solution = 4.50 mol/L
Mass of ethanol = 16.7 g
Volume of solution = ?
Solution:
Volume will be calculated from molarity formula.
Molarity = number of moles / volume in L
Number of moles:
Number of moles = mass/molar mass
Number of moles = 16.7 g/ 46.07 g/mol
Number of moles = 0.3625 mol
Volume of solution:
Molarity = number of moles / volume in L
4.50 mol/L = 0.3625 mol / volume in L
Volume in L = 0.3625 mol /4.50 mol/L
Volume in L = 0.0805 L
Volume in mL:
0.0805 L ×1000 mL/1 L
80.5 mL
If a jet's cruising altitude is 32,200 ft (to three significant figures), this distance in km is 9.82 km.
<h3>What are significant figures?</h3>
Significant figures are the number of digits in a value, often a measurement, that contributes to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.
In this case, given the conversion factors from miles to kilometres and from miles to feet, we can directly compute the jet’s cruising altitude in kilometres as shown below:
=9.82 km
Learn more about the significant figures here:
brainly.com/question/14359464
#SPJ1
Answer:
V ≈ 70.5 cm³
Explanation:
Density = Mass / Volume
Step 1: Define
Mass = 0.630 kg = 630 g
Density = 8.94 g/cm³
Volume = ?
Step 2: Substitute and Evaluate for V
8.94 g/cm³ = 630 g / V
V = 70.4698 cm³
Step 3: Simplify
We are given 3 sig figs.
70.4698 cm³ ≈ 70.5 cm³
