What is the molarity of a 2.4-liter solution containing 124 grams of HF?a. 2.6 M HF <----- my guess based on calculations
b. 6.2 M HF
c. 8.3 M HF
d. 15 M HF

Answers

Answer 1

Answer: Molar mass:

HF = 1 + 19 = 20.0 g/mol

Number of moles :

124 / 20.0 => 6.2 moles

Volume = 2.4 L

M = n / V

M = 6.2 / 2.4

M = 2.6 M

Answer A

hope this helps!

Answer 2

Answer: The Answer is A as you said:

Molarity = $(no. of moles)/(volume)$

moles of HF = $(mass)/(molar mass)$
= $(124)/((1 + 19))$
= 6.2 mol

∴ molarity of HF = $(6.2 mol)/(2.4 dm^(3) )$
= 2.58 M
≈ 2.6 M

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Where is the smallest negatively-charged particle found in an atom?

Answers

Answer:

In the orbitals of the atom

Look at this picture of a whale shark.Which question about whale sharks is nonscientific?

A) What do whale sharks eat?

B) How big is the average whale shark’s mouth?

C) Does a whale shark like having a large mouth?

D)What happens to the water that enters a whale shark’s mouth?

Chemistry Honors College level

10th grader

Answers

Answer:

The nonscientific question about whale sharks is

C) Does a whale shark like having a large mouth?

This question asks for the subjective preference of a whale shark, which cannot be determined scientifically since we cannot directly communicate with the animal. Scientific questions are typically based on observable facts and measurable data.

Explanation:

Have a good day <3

A strong acid with a concentration of 0.01 Mol/L would have a pH of __________.2

1

3

4

Answers

Answer:

Explanation:

the pH of the strong acid solution will be

pH = -log[H+] = -log[0.01] = 2

Seriously help please??Assuming all of the atoms attached to the central atom were identical, which of the following geometries would produce a nonpolar molecule? (Only 3 choices are correct.)

-linear
-trigonal planar
-tetrahedral
-trigonal bipyramidal
-octahedral
-bent (angular)

Answers

Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Using VSEPR and electron pair repulsion, we can easily find that linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule if we assume that all of the atoms attached to the central atom were identical. Any geometries which have center of symmetry will produce non polar molecule.

Therefore, linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

To learn more about chemical compound, here:

brainly.com/question/26487468

#SPJ2

Using VSEPR and electron pair repulsion, we can easily find that:

linear
tetrahedral
trigonal planar

are all non polar molecules.

A pain-relieving pill has a mass of 0.005 g. Express the pill’s mass in grams using scientific notation or in milligrams.

Answers

Answer : The mass represented in scientific notation as $5.0* 10^(-3)g$ and the mass in milligram is, 5 mg

Explanation :

Scientific notation : It is the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example :

5000 is written as $5.0* 10^3$

889.9 is written as $8.899* 10^(-2)$

In this examples, 5000 and 889.9 are written in the standard notation and $5.0* 10^3$ and $8.899* 10^(-2)$ are written in the scientific notation.

If the decimal is shifting to right side, the power of 10 is negative and if the decimal is shifting to left side, the power of 10 is positive.

As we are given the 0.005 g in standard notation.

Now converting this into scientific notation, we get:

$\Rightarrow 0.005g=5.0* 10^(-3)g$

As, the decimal point is shifting to right side, thus the power of 10 is negative.

Thus, the mass represented in scientific notation as $5.0* 10^(-3)g$

Now we have to determine the mass in milligram.

The conversion used from gram to kilogram is:

1 gram = 1000 milligram

or,

1 g = 1000 mg

As we are given the mass 0.005 grams.

As, 1 gram mass = 1000 mg

So, 0.005 gram mass = $(1000g)/(1g)* 0.005mg=5mg$

The mass in milligram is, 5 mg

$\boxed{ \ 5.0 * 10^(-3) \ grams \rightarrow 5.0 \ milligrams \ }$

Further explanation

Scientific notation represents the precise way scientists handle exceptionally abundant digits or extremely inadequate numbers in the product of a decimal form of number and powers of ten.

Put differently, such numbers can be rewritten as a simple number multiplied by 10 raised to a certain exponent or power. It is a system for expressing extremely broad or exceedingly narrow digits compactly.

Scientific notation should be in the form of

$\boxed{ \ a * 10^n \ }$

where

$\boxed{ \ 1 \leq a \ < 10 \ }$

The number "a" is called "mantissa" and the exponent "n" the order of magnitude.

The exponent tells about the size of the number.

A positive exponent indicates a number greater than or equal to 1.
A negatifive exponent indicates a number between 0 and 1.

From the key questions asked, we face the standard form of 0.005 grams which will be converted into scientific notation.

$0.005 = (5)/(1,000)$

The coefficient (or mantissa) is 5, which has fulfilled the interval 1 ≤ a < 10.
The denominator consists precisely of three zero digits.

Hence, 0.005 grams is written in scientific notation as $\boxed{ \ 5.0 * 10^(-3) \ grams \ }$

Because 1 milligrams is equal to 10⁻³ grams, then

$5.0 * 10^(-3) \ grams * (1 \ milligrams)/(10^(-3) \ grams)$

Hence, 0,005 grams is 5.0 milligrams.

In science, we frequently must deal with extremely small or incredibly large quantities. For a typical example, one of the recognized limitations of the microwave frequency is 300,000,000 Hz with a photon energy of 0.00000124 eV. They with many zeros can be impractical to work with, so scientists properly implement scientific notation.

The inverse of scientific notation is the standard form. To promptly change scientific notation into standard form, we reverse the process, move the decimal point to the right or left. This expanded form is called the standard form.

$\boxed{ \ 3.0 * 10^(8) \ Hz \ \rightarrow 300,000,000 \ Hz \ or \ 300 \ MHz \ }$

$\boxed{ \ 0.00000124 \ eV \ \rightarrow 1.24 * 10^(-6) \ eV \ or \ 1.24 \ \mu eV \ }$

Learn more

How is 0.00069 written in scientific notation? brainly.com/question/1898080
How to explain 3,482,000,000 in scientific notation brainly.com/question/231855
Convert the number expressed in standard form to scientific notation brainly.com/question/10436883

Keywords: a pain-relieving pill has a mass, 0.005 grams, express, written, in scientific notation, milligrams, expanded form, exponent, base, standard form, mantissa, the order of magnitude, power, decimal, very large, small, figures, abundant digits, inadequate

In a combination redox reaction, two or more compounds, at least one of which is a(n) compound, form a(n) products. General Reaction: X YZ → XZ Y. In a decomposition redox reaction, a(n) compounds forms two or more atoms (or ions), at least one of which is a(n) ion. General Reaction: Z → X Y In double-displacement (metathesis) reactions, such as precipitation and acid-base reactions, ____________ of two ____________ exchange places; these reactions ____________ redox processes. General Reaction: AB CD → AD CB In solution, single-displacement reactions occur when a(n) ____________ of one ____________ displaces the ____________ of another. Since one of the ____________ is a(n) ____________ , all single-displacement reactions ____________ redox processes. General Reaction: X Y → Z

Answers

Answer:

Here's what I get

Explanation:

In double-displacement (metathesis) reactions, such as precipitation and acid-base reactions, the cations of two compounds exchange places; these reactions are not redox processes.

General Reaction: AB + CD → AD + CB

In solution, single-displacement reactions occur when an atom of one element displaces the atom of another. Since one of the reactants is an element, all single-displacement reactions are redox processes.

General Reaction: X + YZ → XY + Z

Answer :

In double-displacement (metathesis) reactions, such as precipitation and acid-base reactions, the cations of two reactants exchange places; these reactions are not redox processes.

In solution, single-displacement reactions occur when an atom of one element displaces the atom of another. Since one of the reactants is an element, all single-displacement reactions are redox processes.

Explanation :

Double-displacement reaction : It is defined as the reaction in which the cation of two reactants molecule exchange their places to give two different products.

The double-displacement reaction are not a redox reaction.

It is represented as :

$AB+CD\rightarrow AD+CB$