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3 years ago

How would the group best find out whether their study is worth more time and resourch

Chemistry

1 answer:

Anastaziya [24]3 years ago

3 0

They would find out by studying hard and researching different things on which is more important

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Leo carefully pipets 50.0 mL of 0.500 M NaOH into a test tube. She places the test tube

Bess [88]

Let's consider the neutralization reaction between HCl and NaOH.

NaOH + HCl ⇒ NaCl + H₂O

To determine the pH of the resulting mixture, we need to determine the reactant in excess. First, we will calculate the reacting moles of each reactant.

NaOH: 0.0500 L × 0.500 mol/L = 0.0200 mol

HCl: 0.0750 L × 0.250 mol/L = 0.0188 mol

Now, let's determine the reactant in excess and the remaining moles of that reactant.

NaOH + HCl ⇒ NaCl + H₂O

Initial 0.0200 0.0188

Reaction -0.0188 -0.0188

Final 1.20 × 10⁻³ 0

The volume of the mixture is 50.0 mL + 75.0 mL = 125.0 mL. Then, 1.20 × 10⁻³ moles of NaOH are in 125.0 mL of solution. The concentration of NaOH is:

[NaOH] = 1.20 × 10⁻³ mol/0.1250 L = 9.60 × 10⁻³ M

NaOH is a strong base according to the following equation.

NaOH ⇒ Na⁺ + OH⁻

The concentration of OH⁻ is 1/1 × 9.60 × 10⁻³ M = 9.60 × 10⁻³ M.

The pOH is:

pOH = -log [OH⁻] = -log 9.60 × 10⁻³ = 2.02

We will calculate the pH using the following expression.

pH = 14.00 - pOH = 14.00 - 2.02 = 11.98

The pH is 11.98. Since pH > 7, the solution is basic.

You can learn more about neutralization here: brainly.com/question/16255996

7 0

2 years ago

In which pair do both atoms have one electron only in an s orbital in their ground states?

Scrat [10]

I can help you only with what is electron in ground state. The electron which is not excited or over which no external force is acting that could possibly make it jump to the higher state,is said to be in its ground state.In excited state,the electron has more energy than it normally has. For convenience,suppose you are an electron,you are in Normal mood,but when your little brother snatches the Tv remote from your hand,you become angry.Your normal state is your ground state and your angry state is your excited state.

5 0

3 years ago

What would happen if we did not have an atmosphere?

olganol [36]

Answer:

The air would still be too thin to breathe. The lack of atmosphere would chill the Earth's surface. Organisms that need air to breathe would die.

Explanation:

Hope it helped!

6 0

3 years ago

What gives an amino acid its unique identity?What gives an amino acid its unique identity?

Salsk061 [2.6K]

The unique identity of amino acid is that each amino acid is bonded to each central atom known as R-group.

Explanation:

Amino acids are nothing but a basic structure which has a central atom called the "alpha carbon atom". This $\alpha$ carbon atom is bonded to an "amino group" ( $NH_{2}$ ), a "carboxyl group" (COOH) or a "hydrogen atom".

There are totally "20 types" of amino acids having a central atom bonded from the R-group. For example: When the R-group is hydrogen, then the amino acid is named glycine. Similarly, if it is attached to methyl group, then the amino acid is alanine. This makes the amino acids unique.

8 0

3 years ago

How can the image be described? Check all that apply.

Paraphin [41]

Answer:

Smaller than the object

Real

Upside down

Explanation:

3 0

2 years ago

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