CHEMISTRY HIGH SCHOOL

Talc _____. is the hardest known mineral has a Mohs hardness of 1 has a Mohs hardness of 10 is harder than quartz

Answers

Answer 1
Answer: Talc is the softest known mineral which is why it has a Mohs hardness of 1. The Mohs Hardness Scale is the most popular way of measuring and testing the hardness of a mineral. The Mohs hardness ranges from 1 (softest) to 10 (hardest). The hardest mineral with a Mohs hardness of 10 is diamond.

Talc is a clay mineral composed of magnesium silicates commonly used in making powder, paint, cosmetics, and many other products.
Answer 2
Answer:

The answer is has a Moh's hardness of 1.

Related Questions

12. Which classification describes the Milky Way? regular spiral barred spiral elliptical irregular
Which of the following statements describes the process of deposition?A. Soil becomes rich through erosion allowing for ample plant growth. B. Minerals are deposited into the soil through erosion. C. The surface area of rocks decreases because of acid rain. D. Materials are transported through erosion and are dropped in another location.
A piece of sodium metal reacts completely with water as follows: 2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 246 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
Describe how spead, velocity andbrcoloration are related.
8. why the partial negative charge occurs in a molecule of water?

if a jar of honey sits for a long time, sugar may crystallize in the jar.describe two possible cause for this crystallization?

Answers

Answer:

Temperature and humidity

Explanation:

Crystallization occurs in super saturated solution. These are the solutions that have solute to solvent ratio of 2:1 or more. Typical honey is 70% sugar and 20% water (the solute concentration is too high).  

Two things cause honey to crystallize.

  1. Temperature
  2. Humidity level

If temperature is lowered the rate of crystallization increases. This is because at low temperature the molecules of solvent come closer and the space between them reduces. This causes the additional solute molecules to be pushed up to form crystals.  

Secondly, humidity also plays a key role. If the humidity reduces, the water molecules evaporates from honey into air. This increases the relative concentration of the solute inside the honey, which causes the honey to crystallize.  
The two possible causes for crystallization in honey is 1. The condition of the room. (if the temperature keeps rising and dropping rapidly) 2. Crystallization rate also depends on the type of honey you keep in your cabinet. There are 300 different kinds of honey and each type crystalizes differently

How many hydrogen(H) atoms are on the reactants side

A.2
B.6
C.12
D.6

Answers

I’m pretty sure it’s c

Hydrogen bonding is a type of(1) strong covalent bond
(2) weak ionic bond
(3) strong intermolecular force
(4) weak intermolecular force

Answers

Option 3. strong intermolecular force

Certain substances such as H2O, HF, NH3 from hydrogen bonds, and the formation of which affects properties (mp,bp,solubility) of substance. Other compounds containing OH and NH2 groups also form hydrogen bond. Molecules of many organic compounds such as alcohols, acids, amines, and amino acids contain these groups, and thus hydrogen bonding plays an important role in biological science.

What type of compound is always an electrolyte?a. polar covalent
b. nonpolar covalent
c. ionic
d. network solid

Answers

Answer:

Options A and C

Explanation:

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. The dissolved electrolyte separates into cations and anions, which disperse uniformly through the solvent.

Based on the definition above the key factor is the ability of the substance to separate into cations and anions.

Option A - This is correct because Some polar covalent compounds are also strong electrolytes. A typical example is HCl.

Option B - This is incorrect because nonelectrolytes end to contain covalent bonds and are typically nonpolar molecules.

Option C - Electrolytes tend to contain ionic bonds that break when the chemical interacts with water and other polar solvents. So electrolytes are typically ionic compounds. This ption is correct.

Option D - A network solid or covalent network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material. Examples of network solids include diamond. This option is also incorrect.
Ionic compounds are always electrolytes because they dissociate into ions in solution

How do organisms that are not autotrophs get they energy they need to sustain life

Answers

They eat autotrophs, or each other. That's how they get energy.
Hope that answered your question.

The nucleus of an atom can have either a positive or negative charge

Answers

The statement is false. The nucleus of an atom can only have a positive charge. The nucleus is made up of protons and neutrons. Protons are positively charged particles while the neutrons do not have a charge. Therefore, the nucleus is positively charged.
Other Questions
Given the reaction:Ba(OH)2(aq) + H2SO4(aq) -->BaSO4(s) + 2 H2O(l) + energyAs the barium hydroxide solution is added to the solution of sulfuric acid, the electrical conductivity of the acid solution decreases because the(1) volume of the reaction mixture increases(2) temperature of the reaction mixture decreases(3) concentration of ions increases(4) concentration of ions decreases
Which pair of compounds are isomers?(1) NO2 and N2O4(2) P2O5 and P4O10(3) HCOOH and CH3COOH(4) CH3OCH3 and C2H5OH
Which two gases make up most of the atmosphere?
Which of the following was NOT a conclusion of Rutherford’s gold foil experiment? a. The atom is mainly empty space b. The nucleus has a negative charge c. The atom has a dense nucleus d. Alpha particles can pass through a thin sheet of gold foil e. All of the above are correct regarding the gold foil experiment