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3 years ago

Discuss elements and compounds by completing the following paragraph

Chemistry

1 answer:

pychu [463]3 years ago

3 0

Elements are substances that are made up of the same atoms which are capable of taking part in a chemical reaction.

There are different types of elements which are represented by symbols gotten from the first letter or the first and any other letter in the name of the element.

Examples of elements include:

Hydrogen (H)

Carbon (C)

Nitrogen (N)

Sodium (Na)

When two or more of these elements combine together through a chemical bond, it leads to the formation of compounds.

Example of a compound includes:

NaCl: The element sodium combine, through electrochemical bonding, with another element chlorine to form the compound sodium chloride.

Learn more here:

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How many moles of sodium hydroxide are in 1.5 liters of a 8 M solution?

cestrela7 [59]

Answer:

chill

Explanation:

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3 years ago

The next 11 questions are related to the titration of 40.00 mL of a 0.0900 M acetic acid solution with 0.0700 M KOH. Assume that

liberstina [14]

Answer:

2.9 is the initial pH of the analyte solution.

Explanation:

The dissociation constant of acetic acid as per theoretical value = $K_a$

$K_a=10^{-4.756}=1.8\times 10^{-5}$

The initial concentration of acetic acid = c = 0.0900 M

$HAc\rightleftharpoons Ac^-+H^+$

initially

c 0 0

At equilibrium

(c-x) x x

The expression of dissociation constant :

$K_a=\frac{[Ac^-][H^+]}{[HAc]}$

$1.8\times 10^{-5}=\frac{x\times x}{(c-x)}$

$1.8\times 10^{-5}=\frac{x\times x}{(0.0900-x)}$

Solving for x:

x = 0.001264 M

$[H^+]=0.001264 M$

The pH of the solution :

$pH=-\log[0.001264]=2.898\approx 2.9$

2.9 is the initial pH of the analyte solution.

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4 years ago

In order for a solute to dissolve in a solvent, what must be true?

Alex Ar [27]

The solute has to be hydrophilic, (water loving).

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4 years ago

What are the characteristics of a plasma

Lyrx [107]

A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons. The characteristics of plasmas are significantly different from those of ordinary neutral gases so that plasmas are considered a distinct "fourth state of matter

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4 years ago

Read 2 more answers

If you want to prepare 2.00 L of a 0.800 M NaNO_3 solution from a NaNO_3 stock solution that is 1.5 M in concentration, how many

Leya [2.2K]

1066.7 ml of the stock solution must start with, preparing 2.00 L of a 0.800 M NaNO3 solution.

<h3>What is volume?</h3>

Volume is the space occupied by a three-dimensional object.

By the formula $\rm M_1V_1= M_2V_2$