Answer:
anion has a negative charge
An anion has more electrons than protons, consequently giving it a net negative charge
False. A buffering solution consists of a WEAK acid such as CH3COOH, C5H5N, or ammonia. <span>A buffering solution resists pH change upon the addition of an acidic or basic components. It can neutralize little amounts of added acid or base, thus maintaining the pH of the solution relatively stable. The correct answer is letter "B. false"</span>
Answer:
Option (A).
Explanation:
A). Structural formula
Structural formula of a chemical compound represents a graphic structure of a molecule.
B). Chemical formula
Chemical formula shows the chemical proportions of the atoms which constitute a molecule of the compound.
C). Space filling model
Space filling model is a 3-D molecular model in which atoms are represented by the spheres whose radii are proportional to the radii of the atoms and distances between the atoms are proportional to the distances between the atomic nuclei.
D). A ball and stick model
This model shows the 3-D positions of the atoms and the bonds between them.
In this model atoms are represented by the spheres and bonds connected by the sticks.
Therefore, model shown is STRUCTURAL FORMULA.
Option (A) is the answer.
Answer:
99 L
Explanation:
Step 1: Given data
Moles of nitrogen: 4.4 moles
Step 2: Calculate the volume occupied by 4.4 moles of nitrogen
The volume occupied by a gas depends on other conditions such as pressure (P) and temperature (T). If we have this information, we can calculate the volume of the gas using the ideal gas condition.
P × V = n × R × T
Since the task doesn't inform the conditions, we can assume it is under standard pressure (1 atm) and temperature (273.15 K). At STP, 1 mole of any gas occupies 22.4 L.
4.4 mol × 22.4 L/1 mol = 99 L
