Which of Earth's Spheres take up most of the Earth's surface?

chemist must prepare of hydrobromic acid solution with a pH of at . He will do this in three steps: Fill a volumetric flask abou

Mademuasel [1]

Answer:

32 mL

Explanation:

A chemist must prepare 500.0mL of hydrobromic acid solution with a pH of 0.50 at 25°C. He will do this in three steps: Fill a 500.0mL volumetric flask about halfway with distilled water. Measure out a small volume of concentrated (5.0M) stock hydrobromic acid solution and add it to the flask. Fill the flask to the mark with distilled water. Calculate the volume of concentrated hydrobromic acid that the chemist must measure out in the second step. Round your answer to 2 significant digits.

Step 1: Calculate [H⁺] of the dilute solution

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -0.50 = 0.32 M

Step 2: Calculate [HBr] of the dilute solution

HBr is a strong acid that dissociates according to the following equation.

HBr ⇒ H⁺ + Br⁻

The molar ratio of HBr to H⁺ is 1:1. The concentration of HBr is 1/1 × 0.32 M = 0.32 M.

Step 3: Calculate the volume of the concentrated HBr solution

We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂ / C₁

V₁ = 0.32 M × 500.0 mL / 5.0 M

V₁ = 32 mL

8 0

4 years ago

Koby decides to change the amount of vinegar. He will keep the amount of baking soda constant at ½ teaspoon. He will run three t

Wittaler [7]

Answer: When baking soda and vinegar are combined, a new substance is produced. The carbon dioxide gas soon foams up in the mixture. Carbon dioxide, water, and sodium acetate are generated when sodium bicarbonate and acetic acid react.As Kobe adds additional baking soda and vinegar, the reaction will also become stronger.

Explanation: well to be completely honest I don't see any answer choices so I'm going to assume that this is a writing question

5 0

3 years ago

Which element among elements 2, 4, and 6 has the lowest ionization energy?

morpeh [17]

Element 6 has the lowest ionization energy

8 0

3 years ago

Read 2 more answers

The relatively high boiling point of water is due to water having

Elden [556K]

The answer is A because water molecules don't have metallic bonding, and water is also polar, and it takes more time for the heat energy to break down the hydrogen bonds

7 0

3 years ago

Describe the position of each part of an atom in the bohe model

Gnom [1K]

Explanation:

Hey, there!!

The parts are an atom are:

Electrons
Protons
Neutrons

Generally, Protons and Neutrons lies in the centre of an atom. After that the shells made outer are covered by electrons. We keep 2 electrons in 1st shell, 8 electrons in 2nd, 18 electrons in 3rd shell and so on. The positions of neutron and protons are always in the nucleus and electrons are in the orbits or shell.

Hope it helps....

3 0

3 years ago