WHAT IS CLEVAGE PLANE

Answers

Answer 1

Answer: Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes.

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What is the mass of 2.50 ×1022 molecules of NaOH (Molar mass = 40.0 g/mol)?

Answers

Two things are given to us: The "molar mass" of NaOH and the number of molecules of NaOH.

The molar mass is different from "mass"; 1 mole of NaOH is equal to 40.0g/mol.
When the question asks, what is the mass? It is referring to how many grams there are.

First, we are going to convert the molecules to atoms using Avogadro's number (=6.02 x 10^23)

(2.50 x 10^22 molecules) x (6.02 x 10^23 atoms) = 0.042 mol

Next, we are going to convert from moles to grams.

0.042 mol of NaOH x 40.0 g of NaOH/1 mole = 1.68g of NaOH.

There are 1.68 grams in 2.50 x 10^22 molecules of NaOH.

Hello!

What is the mass of 2.50 ×1022 molecules of NaOH (Molar mass = 40.0 g/mol)?

Data:

Molar Mass of NaOH = 40 g/mol

Solving: According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules

1 mol -------------------- 6.02*10²³ molecules

y mol -------------------- 2.50*10²² molecules

$(1)/(y) = (6.02*10^(23))/(0.250*10^(23))$

Product of extremes equals product of means

$6.02*10^(23)*y = 0.250*10^(23)*1$

$6.02*10^(23)\:y = 0.250*10^(23)$

$y = (0.250*10^(23))/(6.02*10^(23))$

$\boxed{y \approx 0.042\:mol}$

Solving: Find the mass value now

40 g ----------------- 1 mol of NaOH

x g ------------- 0.042 mol of NaOH

$x = 40*0.042$

$\boxed{\boxed{x = 1.68\:g}}\end{array}}\qquad\quad\checkmark$

Answer:

The mass is 1.68 grams

_______________________

I Hope this helps, greetings ... Dexteright02! =)

PLEASE HELPPPPP Antimony exists naturally as 2 isotopes. Antimony-121 has a mass of 120.9038 amu and an abundance of 57.30%. Determine the mass of the other isotope, antimony-123 knowing the average atomic mass of the element is 121.80 amu.

Answers

Answer: 1.6.905.x2.00=amu

Explanation:

if you multiply the atomic mass x 2.00 it will give you 1.6.905x2.00Amu your welcome

Choose from the following descriptions of solid:HCl(s)
(A) composed of macromolecules held together by strong bonds
(B) composed of atoms held together by delocalized electrons
(C) composed of positive and negative ions held together by electrostatic attractions
(D) composed of molecules held together by intermolecular dipole–dipole interactions
(E) composed of molecules held together by intermolecular London forces

Answers

The solid HCl is composed of molecules held together by intermolecular dipole–dipole interactions. The significant electronegativity difference between H and Cl make the dipole -dipole force in between HCl molecules.

What is dipole - dipole force ?

Dipole -dipole forces arises between molecules of permanent dipole moment. Covalent compounds are formed between two non-metals through electron sharing .

When one atoms is highly electronegative compared to the other, the shared pair of electrons attracts more to the electronegative atom. Which make partial charge separation and the compound becomes polar.

Two polar molecules attracts each other through dipole -dipole forces. HCl is a polar compound. Thus, in HCl solid, HCl molecules are held together by dipole -dipole forces.

Find more on dipole -dipole forces:

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pretty sure it's C!

Which of the following can’t be separated into simpler substances or converted into another substance by chemical processes?a. elements
b. compound
c. solution
d. suspension
e. colloid

Answers

The correct answer is A. An element cannot be separated into simpler substances or converted into another substance by chemical processes. Elements are the most simplest form of the chemicals. They are what we see in the periodic table.

The substances that can't be separated into simpler substances or converted into other substances by chemical processes are elements. They are fundamental substances and cannot be changed into other elements through chemical processes. The correct answer to the given question is option a. elements

The answer to your question is a. elements. In chemistry, elements are substances that cannot be separated into simpler substances or converted into another substance by chemical processes.

This is what makes them fundamental substances. Chemical processes can change compounds, solutions, suspensions, and colloids into different substances, but they cannot change an element into a different element. For example, hydrogen is an element that cannot be converted into any other element through chemical processes. It is fundamentally hydrogen.

The correct answer to the given question is option a. elements

For more such questions on elements, click on:

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How many moles are present in 4.7 liters of Argon gas at STP?

Answers

The answer for the following problems is mentioned below.

Therefore the number of moles present in Argon is 0.20 moles.

Explanation:

Mole:

The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of $C^(12)$ .

Given:

volume (v) = 4.7 litres

Volume of argon at STP conditions = 22.4 litres

To find:

volume of argon at STP conditions

We know;

n = $(v)/(V)$

where;

n represents the no of moles

v represents the volume of the argon

V represents the volume of argon at STP

volume of the argon at STP conditions is 22.4 litres

So;

n = $(4.7)/(22.4)$

n = 0.20 moles

Therefore the number of moles present in Argon is 0.20 moles.

44 points! Will medal!3. A calorimeter contains 500 g of water at 25°C. You place a hand warmer containing 200 g of liquid sodium acetate inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 39.4°C. The specific heat of water is 4.18 J/g-°C. How much energy was needed to heat the water?

Answers

A calorimeter contains 500 g of water at 25°C.....

the temperature of the water inside the calorimeter is 39.4°C.....

The specific heat of water is 4.18 J/g-°C.

energy needed to heat the water = specific heat * mass * temp difference

= 4.18 J/g-°C * 500 g * (39.4°C - 25°C)

= 4.18*500*14.4

= 30096J

or approx. 30kJ

Energy=specific heat of water x mass of water x water's temperatures

=4.18x500x(39.4-25)

=30096J

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Air bags, which act as safety devices in cars, contain solid sodium azide. On impact, the sodium azide releasesnitrogen gas, which expands the air bag. The main benefit of using a gas instead of another type is that —A. gas molecules are subject to ionic bondingB. the separation of gas molecules is much greater than the volume they occupyC. gases won’t explode the bag on very hot daysD. gas molecules don’t transfer excess Kinetic Energy

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