The mineral hardness depends on its resistance to being scratched. Mohs scale is used to determine the hardness of an unknown mineral. The unknown mineral is harder than Orthoclase, but not harder than Quartz.
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The hardness of a mineral is its resistance to being scratched or marked on the surface by another material.
Several elements are used to test the hardness of a mineral, like another mineral of known hardness.
Many different scales can be used to identify the mineral. However, the most commonly used is the Mohs scale.
Let us say that you have two minerals. You already know which mineral is one of them and its hardness.
If the unknown mineral scratches the known mineral, means that the first one is harder than the second one.But if the unknown mineral does not get to scratch the known one, it means they are equally hard, or the known mineral is harder than the unknown one.In the exposed example, the table must be as follows
Mineral Was a scratch produced?
Chalcopyrite YES
pyrite YES
Orthoclase YES
Quartz NO
Quartz is the hardest of these minerals. Its hardness level is 7 according to the Mohs scale.
Because scratches were produced using Chalcopyrite, Pyrite, and Orthoclase, we can assume that the unknown mineral is harder than these three ones.
However, no scratch was produced using quartz, suggesting that the unknown mineral is between orthoclase and quartz in the Mohs scale.
The unknown mineral is harder than Orthoclase, but not harder than Quartz. It is between 6 and 7 hardness levels.
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Answer:
I can conclude that the mineral that the scientist found is harder than chalcopyrite, pyrite, and orthoclase, but not harder than quartz. I can also conclude that the unknown mineral is a relatively hard mineral.
Explanation:
edge example 2023
how many different elements are present in c6h12o6
Answer:
3 different elements are present in the compound.
The electron-domain geometry of a sulfur-centered compound is trigonal bipyramidal. The hybridization of the central sulfur atom is ________.
The hybridization state of the central sulfur atom is sp3d.
The valence shell electron pair repulsion theory describes the shape of molecules in terms of the number of electron pairs that surround the valence shell of the central atom in the molecule.
There are certain molecular shapes that are associated with certain hybridization states of the central atom. Since the central sulfur atom is trigonal bipyramidal, the hybridization state is sp3d.
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what is the relationship between plants soil and nutrients?
Answer:
Soil helps anchor plants and provides them essential elements of water and nutrients. Plants prevent soil erosion and provide organic matter.
Explanation:
How do vascular plants get the water and minerals they need to live?
through de' la' dasini
You know that a circuit is a path along which electrical charges can flow. In this activity, you are going to illustrate that the flow of electricity needs a closed circuit. Your task is draw the wires that connect these objects in order to create a closed circuit. In the space provided, write one sentence that identifies why this circuit allows electrical charges to flow. Be sure to include each object in your answer.
Answer:
I cant do it for you but to help you I can tell you this The charged particles can move only when there is a complete conducting pathway (called a 'circuit' or 'loop') from one terminal of the battery to the other.
Explanation:
Can someone help me please
Answer: The correct pairs of elements likely to form ionic compounds are, potassium and sulfur, magnesium and chlorine. The answer is argon please give me brainlist
Explanation:
What are some advantages to the use of hydrokinetic energy? What might be some disadvantages?.
Hydro-kinetic energy has advantages of being a clean, domestic, and renewable source with effective production. The disadvantages have been affected marine environment, along with water quality, and electricity on drought.
Hydro kinetic energy has been the energy produced by the movement of water bodies in the form of tides, waves, and oceanic current. The hydro-kinetic energy has been composed with high energy entrapped in the water bodies.
Some of the advantages of hydro-kinetic energy has been:
It has been a clean energy source and has been pollution free.It has been used as domestic source of energy.It has been a renewable source of energy.It has been produced by the tidal waves, thus can be produced effective and in need.Some of the disadvantages of hydro-kinetic energy has been:
Application of water bodies affects the marine environment.It has been producing low BOD and thereby affects the water quality.Conditions such as drought result in the affected electricity production.For more information about hydro-kinetic energy, refer to the link:
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Answer:
Some advantages to using hydrokinetic energy are that it can be used without mining materials, it is not associated with waste production, and that it does not contribute to air pollution. The main disadvantage to using hydrokinetic energy is the fact that it uses waves and tides as an energy source. This technology could not be used in all locations.
Explanation:
got it on edge sorry for the late response
which of the following contains a covalent bond?
A) BeO
B) LiCI
C) CN
D) MgO
Answer= C) CN contains a covalent bond.
I get it! Now I know that an organism's traits
are controlled by ____________
Answer:
Genes mainly, however the environment as well
Explanation:
Help!! I’ll mark you Brainliest.!
Answer:
For 5 pts? gimme that
Explanation:
Answer:
Explanation:
if you know what those phrases mean, then you can look them up and draw those pictures you find, as well as add the definition of each.
it was observed that magnesium sulphate was present in tap water ,which hardness might that be
Answer:
Calcium sulphate is the right answer for this question.
It is because calcium sulphate helps to obtain the hardness in water. hardness.
The presence of this resource is a main reason for permanent hardness.
Hard drinking water has moderate health benefits, but can pose serious problems for the industrial settings.
Explanation:
1 point
A system that absorbs energy from its surroundings is said to be: *
Answer: Exothermic.
Explanation:
Exo means “outside” and the outside relates to surroundings so it’s my best choice.
Answer:
endothermic is the answer
An elephant takes a deep breath, releasing 9.50g of CO2. How many molecules CO2 is this?
Answer:
3 significant figures.
Explanation:
So, a mole is essentially a group of things. In this case, a mole of carbon dioxide will contain
6.022 ⋅ 10 [ by the 23rd power]
molecules of carbon dioxide. In other words, in order to have
1 molecule of carbon dioxide, you need to have 6.022 ⋅ 10 [by the 23rd power] molecules of carbon dioxide.
You know that 5.00 ⋅ 10 [ by the 2nd power] molecules of carbon dioxide are exhaled from the lungs when we breathe out. You can use Avogadro's constant as a conversion factor to help you figure out how many molecules are present.
A sugar crystal contains approximately 1.4×1017 sucrose (C12H22O11) molecules. What is its mass in milligrams? Express using 2 sig figs
Answer:
Our process would be just turning the molecules of sucrose to the moles by dividing using Avogadro's number (6.02 x 10^23), which will give us the moles we need. In order to find the mass of the sucrose, you have to multiply the moles by the molar mass of sucrose in order to find the mass, and then multiply by it 1000 to change it to mg.
Here are the formulas:
Number of moles = Number of molecules / Avogadro's number
Mass = Moles x Molar mass
Number of moles = (1.4 x 10^17) / (6.02 x 10^23) = 2.3255814 x 10^-7 moles
Now that we have the moles, we can multiply them by Sucrose's molar mass, which can be calculated by using the masses listed in the periodic table.
Carbon's Molar Mass = 12g/mol (There are 12 atoms of Carbon in sucrose)
Hydrogen's Molar mass = 1.01g/mol (22 atoms of Hydrogen in sucrose)
Oxygen's Molar mass = 16g/mol (11 atoms of oxygen in sucrose)
Now we just add them together:
((12)x(12)) + ((1.01)x(22)) + ((16)x(11)) = 342.22g/mol is the molar mass of Sucrose
Now back to the question, you multiply the moles of sucrose by its molar mass to get the mass in grams
(2.3255814 x 10^-7) x (342.22) = 0.0000796 grams
Now to get it in milligrams, you multiply the answer above by 1000
0.0000796 x 1000 = 0.079 mg (already in 2 sig figs)
Therefore there are 0.079 milligrams of sucrose in the sugar crystal.
The mass of sucrose molecules is 0.079 milligrams .
How is mass calculated from number of molecules?To calculate mass of a substance wherein number of molecules is given, initially number of moles is obtained.
number of moles= number of molecules/Avogadro's number
=1.4×10¹⁷/6.022×10²³
=2.234×10[tex]^-7[/tex]
Now the mass is calculated by multiplying number of moles into molar mass of sucrose
=2.234×10[tex]^-7[/tex]×342.22
=795.31 ×10[tex]^-7[/tex] g
=0.079 mg.
The mole concept is a convenient method for expression of amount of substance in chemical applications.It is mainly focused on the quantity of mole which is a count of large number of particles.One mole of any substance is equal to the Avogadro's number .
It is useful for measuring products of chemical reaction. It is the basis of stoichiometry and expresses amount of reactants and products which are formed and consumed during the course of chemical reaction.
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250 mL of argon gas is held in a flexible vessel shown above. If
the pressure changes to 12.0 atm, what is the new volume of
the gas at 20°C?
The new volume of the gas at 20 °C is 205 mL
From the question given above, the following data were obtained:
Initial volume (V₁) = 250 mL Initial pressure (P₁) = 10 atmInitial temperature (T₁) = 25 °C = 25 + 273 = 298 KNew pressure (P₂) = 12 atmNew temperature (T₂) = 20 °C = 20 + 273 = 293 KNew volume (V₂) =?With the application of the combine gas equation, we can obtain the new volume of the gas as illustrated below:
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2} \\ \\ \frac{10 \times 250}{298} = \frac{12 \times V_2}{293} \\ \\ \frac{2500}{298} = \frac{12 \times V_2}{293} \\ \\ cross \: multiply \\ \\ 298 \times 12 \times V_2 = 2500 \times 293 \\ \\ divide \: both \: side \: by \: 298 \times 12 \\ \\ V_2 = \frac{2500 \times 293}{298 \times 12} \\ \\ V_2 = 205 \: mL \\ [/tex]
Therefore, the new volume of the gas is 205 mL
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The new volume of the gas at the given pressure and temperature is 205 mL.
The given parameters:
Initial volume of argon, V₁ = 250 mLInitial pressure of gas, P₁ = 10 atmFinal pressure of the gas, P₂ = 12 atmInitial temperature of the gas, T₁ = 25 ⁰C = 273 + 25 = 298 KFinal temperature of the gas, T₂ = 20 ⁰C = 273 + 20 = 293 KThe new volume of the gas is calculated by applying general gas equation as follows;
[tex]\frac{V_1 P_1}{T_1} = \frac{V_2P_2}{T_2} \\\\V_2 = \frac{V_1P_1 T_2}{T_1P_2} \\\\V_2 = \frac{(250\ mL) \times 10 \times 293}{298 \times 12} \\\\V_2 = 204.84 \ mL\\\\v_2 = 205 \ mL[/tex]
Thus, the new volume of the gas at the given pressure and temperature is 205 mL.
Learn more about general gas equation here:
which of the following is a characteristic of the modern periodic table
1.The two green substances are not same thing because some of their properties are different and some of them are the same. If they were the same substance, all of their properties would have to be the same.
How could the explanation be improved?
Answer:
Even though the two substances possess many similarities, they have some unique properties. In turn, since they have the same properties, if they were the same substance, it would make matters worse, if the same chemical was in two different places, there would not be a difference between them since they are the same, just as it is with are two different chemicals would have differing properties since they are two properties would vary from one another since they are 2 totally different things!
Explanation:
AHHHH HELP IM TIMEd!!!!! WILL BRAINLIEST
Answer:
211.0
Explanation:
∆G(free energy) = ∆H(enthalpy) - T∆S(entropy)
∆H = 215KJ/mol
T = 90°C = 273 + 90
= 363K
∆S = 11J/mol/K or 11 × 10^-3kJ/mol/K
∆G = 215- 363(11 × 10^-3)
= 215 - 3.993
= 211.007
To the nearest tenth 211.0
2KClO3 —> 2KCl2+ 3O2
true if balanced or false if not
reaction type 1: synthesis, 2: decomposition, 3: single replacement, 4: double replacement, 5: combustion
Answer:
False. The balanced equation should be
2KClO3-->2KCl + 3O2
it is a decomposition reaction.
All three types of rock form in which earth layer?
Answer:
Lithosphere
Explanation:
All three types of rock make up the Earth's lithosphere, the outermost layer. The lithosphere averages about 100 kilometers in thickness.
1. Why do you think the map is labeled "Three Sisters”?
also, i know this isn’t chemistry but i couldn’t find Earth Science so don’t come for me . i would appreciate it if y’all could help me the best you can!
Answer:
It's called the “The Three Sisters” because it comes from an Iroquois legend. The Legend says corn, beans and squash are inseparable sisters that were given to the people by the “Great Spirit.” It is important to note, however, that the “Three sisters” are also found in many other areas and tribes around North America.
fe3(so4)3->fe(oh)3->fe2o3->fe->feso4->fecl2
Answer: Id answer it but i think your copy and paste got corrupted!
Explanation:
2) Nitrogen gas will react with hydrogen gas to produce ammonia, NH3, How many
moles of hydrogen gas are required to produce 0,86 moles of NH3?
Answer:
12 grams of hydrogen gas
and 56 grams of nitrogen gas
The molar mass of ammonia is 17 g/mol.
68 grams of ammonia corresponds to
17g/mol
68g
=4moles
4 moles of ammonia will be obtained from
2
4×1
=2 moles of nitrogen and
2
4×3
=6 moles of hydrogen.
The molar masses of nitrogen and hydrogen are 28 g/mol and 2 g/mol respectively.
2 moles of nitrogen corresponds to 2×28=56 grams.
6 moles of hydrogen corresponds to 6×2=12 grams.
What is gadolinium
And what would be a superpower that relates to it
Answer:
Chemical with symbol Gd on periodic table of elements. It reacts with oxygen.
Fire superpower i guess
Explanation:
How do you balance C4H10 + Cl2 + O2 —> CO2 + CCl4 + H2O?
Answer:
4C4HO + 4Cl2 + 13O2 → 14CO2 + 2CCl4 + 2H2O
Explanation:
Balance The Equation: C4HO + Cl2 + O2 = CO2 + CCl4 + H2O
1. Label Each Compound With a Variable
aC4HO + bCl2 + cO2 = dCO2 + fCCl4 + gH2O
2. Create a System of Equations, One Per Element
C: 4a + 0b + 0c = 1d + 1f + 0g
H: 1a + 0b + 0c = 0d + 0f + 2g
O: 1a + 0b + 2c = 2d + 0f + 1g
Cl: 0a + 2b + 0c = 0d + 4f + 0g
3. Solve For All Variables
a = 4
b = 4
c = 13
d = 14
f = 2
g = 2
4. Substitute and Verify Result
4C4HO + 4Cl2 + 13O2 = 14CO2 + 2CCl4 + 2H2O
L R
C: 16 16 ✔️
H: 4 4 ✔️
O: 30 30 ✔️
Cl: 8 8 ✔️
hope this helps! :D
which properties are affected by temperature?
Answer:
Please give Brainliest!
Explanation:
Material properties are dependent on the temperature. The tensile strength, yield strength and modules of elasticity decrease with increasing temperature. It should be expected that fatigue properties are also affected by the temperature.
Note the mass of copper(1) oxide formula unit 143.091 what is the mass of 8.250 moles of Cu2O
Answer:
The mass of 8.250 moles of Cu2O is 1180.5g
Explanation:
HOW TO CALCULATE MASS OF A SUBSTANCE:
The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:Mass (g) = no. of moles (mol) × molar mass (g/mol)
Molar mass of copper (I) oxide (Cu2O) = 63.5(2) + 16 = 143.09 g/molMass of Cu2O = 8.250 mol × 143.09 g/mol
Mass of Cu2O = 1180.5 g
Therefore, the mass of 8.250 moles of Cu2O is 1180.5 g.
Which element are in the compound CoCI2?
Choose all correct answers.
Answer:
the answer is cobalt and chloride
The boiling points of different substances are given in the table below. Substance Boiling point (°C) Acetic acid 118. 1 Benzene 80. 2 Chloroform 61. 2 Water 100. 0 Which substance most likely has the strongest intermolecular forces? acetic acid benzene chloroform water.
The compound with the presence of higher inter-molecular forces has been Acetic acid. Thus, option A is correct.
The boiling point has been the temperature, at which the liquid has been started to convert to steam. The boiling has been mediated with the application of the energy to the substance for the breaking of the inter-molecular forces.
The higher the inter-molecular forces in the compound, the higher will be the boiling point of the compound. The higher concentration has also resulted in a higher boiling point.
In the following compounds, acetic acid has the highest boiling point of 118 degrees Celsius. Thus, it has been constituted of the higher inter-molecular forces. Hence, option A is correct.
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Who ever gets it right first I will give brainly and 20 points. Have a very merry christmas
Answer: It is conserved.
Explanation: When the box is pushed across the floor, then floor and box becomes warm which resembles the condition of conservation of energy.
The given problem can be resolved by the concept of energy conservation. The statement of energy conservation says that, "Energy is neither be created nor be destroyed, but it is converted from one form to another.
In the given problem, the person pushes the box across the floor, such that the mechanical energy from the moving arms of person is transferred to the box, and the box and floor becomes warm.
During this process, the energy from the person moving arm is transferred to the box in the form of kinetic energy. And thus kinetic energy is then being transferred to thermal energy or heat energy, due to which the box and floor becomes warm.
Thus, we can conclude that the given case reflects the process of transformation of energy from one state to another, which highlights that during the process, energy is conserved.