Answer:
Carbon alone forms the familiar substances graphite and diamond. Both graphite and diamond are made only of carbon atoms. Graphite is very soft and slippery. Diamond is the hardest substance known to man. If both are made only of carbon what gives them different properties?
The answer lies in the way the carbon atoms form bonds with each other.
Explanation:
PLEASE HELP!! NO LINKS PLEASE REAL ANSWER!!!!!
What will be volume of 20.0 g of CH4 gas at a pressure of 0.950 atm and temperature of 21.0 oc?Question 1 options:
A. 21.8 L
B. 31.8 L
C. 2.27 L
D. 4.27 L
List 3 natural resources (non-living) found in the “glorious place”
Answer:
уфукингнегроитукиурепоинты
Explanation:
If the experiment were repeated using a cuvettes with a path length of 2.0 cm, how would that affect the absorbance values for the Co2 solutions (if at all), assuming all of the concentrations remained unchanged?
Answer:
..............................
please help- science
1. - new
2. full
3. first quarter
4. last quarter
Answer:
2. Full
Explanation:
A lunar eclipse occurs at a full moon when Earth is directly between the moon and the sun. During a lunar eclipse, Earth blocks sunlight from reaching the moon.
Hope this helps!!
Compute the number of electrons that each lead atom donates, on average, to a bulk piece of lead metal. Room temperature data for lead: The conductivity of lead is 4.90 × 104 1/(Ω·m) The electron mobility of lead is 2.3 cm2/(V·s) The mass density of lead is 11.4 g/cm3 The atomic weight of lead is 207 g/mol
Answer:
4 electrons/atom
Explanation:
The conductivity of the lead σ = neμ where n = electron density, e = electron charge = 1.602 × 10⁻¹⁹ C and μ = electron mobility of lead = 2.3 cm²/(V·s) = 2.3 × 10⁻⁴ m²/(V.s)
Making n subject of the formula, we have
n = σ/eμ
Since σ = 4.90 × 10⁶ (Ω·m)⁻¹
Substituting the values of the variables into the equation, we have
n = σ/eμ
n = 4.90 × 10⁶ (Ω·m)⁻¹/(1.602 × 10⁻¹⁹ C × 2.3 × 10⁻⁴ m²/(V.s))
n = 4.90 × 10⁶ (Ω·m)⁻¹/(3.6846 × 10⁻²³ Cm²/(V.s))
n = 1.33 × 10²⁹ electrons/m³
We now find the number of moles of lead present in 1 m³ of lead.
So n' = ρ/M where ρ = density of lead = 11.4 g/cm³ = 11.4 g/cm³ × 10⁶ cm³/m³ = 11.4 × 10⁶ g/m³ and M = atomic weight of lead = 207 g/mol
So, n' = ρ/M
N = 11.4 × 10⁶ g/m³/207 g/mol
n' = 0.0551 × 10⁶ mol/m³
n' = 5.51 × 10⁴ mol/m³
Since n' = N/N' where N = number of atoms of lead in 1 m³ of lead and N = Avogadro's constant = 6.022 × 10²³ mol⁻¹
N = n'N' = 5.51 × 10⁴ mol/m³ × 6.022 × 10²³ mol⁻¹
N = 33.18 × 10²⁷ atoms/m³
N = 3.318 × 10²⁸ atoms/m³
So, the number of electron per atom is N" = n/N
= 1.33 × 10²⁹ electrons/m³ ÷ 3.318 × 10²⁸ atoms/m³
= 0.4 × 10¹ electrons/atom
= 4 electrons/atom
help me with questions 6,11,15,16 and 17 please
ayúdame con las preguntas 6,11,15,16 y 17 por favor
What locations are likely to be affected by an earthquake or tsunami?
San Francisco, California, USA
San Francisco, Tokyo, and Asunción
Tokyo, Japan
None of the locations
Asunción, Paraguay, South America
Answer:
All the locations can suffer earthquakes and a handful like tokyo tsunami so the question is either or so the anwer would be all
Explanation:
Reveal the protein to trait example. How did the differences and proteins lead to different traits for this feature.
Please help me no links.
Explanation:
Proteins are responsible for shaping and growth of an organism. Explanation: The differences in proteins lead to different in traits because it is the protein that determines the trait. ... These proteins shaped the structure of organisms so we can say that difference in traits occur due to difference in their proteins.
Which of the compounds shown are structural
isomers of this compound? Check all that apply.
A
B
С
D
Answer:
A & C
Explanation:
The next one is A Edge 2022
The compound which are the structural isomers of the given compound is compound A & C.
What are structural isomers?Structural isomers are those isomers in which which are having the same molecular formula but different structural structures.
Compound A: A is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound B: B is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Compound C: C is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound D: D is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Hence A & C are the structural isomers of given compound.
To know more about structural isomers, visit the below link:
https://brainly.com/question/26298707
Help solve the types of chemical reactions
[tex]1) \: decomposition[/tex]
[tex]2) \:hydrocarbon \: combustion[/tex]
[tex]3) \: formation[/tex]
[tex]4) \: double - replacement[/tex]
[tex]5 \: double - replacement[/tex]
[tex]6) \: formation[/tex]
[tex]7)double \: - replacement[/tex]
[tex]8) \: double - replacement[/tex]
Which climate condition will cause the fastest chemical weathering of granite sandstone and shale
Answer:
1. Tropical Climate
Explanation:
Due to the high heat in tropical climates, the moisture speeds up chemical weathering
PLEASE HELP REAL ANSWER NO FILE. Part A
Electricity generated from any source comes with its own advantages and
disadvantages. So, no source of energy for generating electricity is perfect. However,
imagine that there is an energy source that perfectly meets the needs of society.
Describe this ideal source of energy. Include relevant factors such as cost, supply, safety,
reliability, and environmental impact
Answer:
Wind energy
Explanation:
An ideal source of energy needs to be reliable, cost effective, safe and must lead to almost zero adverse environmental impact.
Wind energy is energy obtained from air moving at high velocity. This energy is harvested using windmills which convert mechanical energy to electrical energy.
Wind is inexpensive because it occurs naturally. However, a large expanse of land is required in order to mount sufficient number of windmills that will generate enough electrical energy for practical purposes.
This method of electricity generation is safe and does not lead to any environmental hazard unlike the burning of fossil fuels, use of nuclear energy or loss of habitat due to hydroelectric power generation.
where does baby came from
Answer:
they came from for the dad sperm
why do we have to write the background of the study
Answer:
Writing down background information can help you to remember what you learned and can be used for notes in the future when taking an assessment.
Explanation:
Can I get brainliest? It's for a challenge
Solid AgCl (Ksp = 1.8 X 10-10) is placed in a beaker of water. After a period of time, the Ag+ concentration is measured and found to be 2.5 X 10-7 M.
a) What is the concentration of Cl-?
b) Has the system reached equilibrium?
c) Will more AgCl dissolve?
Explanation:
a)
[tex]k _{sp} = [Ag {}^{ + } ][Cl {}^{ - } ] \\ but \: [Ag {}^{ + } ] = [Cl {}^{ - } ] \\ k _{sp} = [Ag {}^{ + } ] {}^{2} \\ [Ag {}^{ + } ] = \sqrt{k _{sp}} \\ = \sqrt{1.8 \times {10}^{ - 10} } \\ = 1.34 \times {10}^{ - 5} mol {dm}^{ - 3} [/tex]
b)
It has not reached equilibrium because the silver concentration is not yet equal to the value of Ksp.
c)
Yes it will dissolve in order to establish the equilibrium.
Which of these statements is true?
1. Electrons reach higher energy levels when they move closer to the nucleus.
2. An electron can absorb energy only from light.
3. The spectrum of hydrogen consists of all frequencies of radiation.
4. The emission spectrum of each element is unique
How many moles of lithium Sophie are in a simple with the number of atoms shown below?
2.94 x 10^23
a 0.0698
b 0.244
c 0.488
d 0.944
What are the substances that interact to form new substances in a chemical reaction called?
A. Reactants
B. Products
C. Chemicals
D. Substances
Answer:
A. Reactants
Explanation:
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
help i will mark brainliest
Answer:
Image A
Explanation:
The hemisphere experiences summer when it is tilted towards the sun. Image a has the northern hemisphere tilted towards the sun.
Answer:
image A
Explanation:
this is because the sun is hitting earth at a steep angle
Alkenes provide many ways for incorporating oxygen atoms at specific locations in our molecule.
a. True
b. False
Answer:
True
Explanation:
Answer:
True
hope it is helpful to you
Suppose you needed to explain the concept of the mole to a junior high school student. What would you tell them?
Answer:
Explanation:
duehgjvcujhyeq bvckjfdsaeb gjdksghUIBGREQWMNHGTRE BAGTFEQA
A cylindrical rod of copper (E = 110 GPa) having a yield strength of 240 MPa is to be subjected
to a load of 6660 N. If the length of the rod is 380 mm, what must be the diameter to allow an
elongation of 0.50 mm?
Answer:
required diameter is 7.65 mm
Explanation:
Given the data in the question;
F = 6660 N
l₀ = 380 mm = 0.38 m
E = 110 GPa = 110 × 10⁹ N/m²
Δl = 0.50 mm = 0.0005 m
So, lets assume the deformation is elastic;
d₀ = √( [4l₀F] / [πEΔl] )
we substitute
d₀ = √( [4 × 0.38 × 6660] / [π × (110 × 10⁹) × 0.0005]] )
d₀ = √( 10123.2 / 172787595.947 )
d₀ = √( 5.85875 × 10⁻⁵ )
d₀ = 0.007654 m
d₀ = ( 0.007654 × 1000 )mm
d₀ = 7.65 mm
Therefore, required diameter is 7.65 mm
Jim makes a mixture which contains 10 mg of salt, 30 mg of sand, and some iron filings. The total mass of the mixture is 100 mg
Which amount of iron filings does Jim use in the mixture?
A10
B30
C40
D60
Answer:
Amount of iron fillings in mixture = 60 mg
Explanation:
Given:
Total mass of mixture = 100 mg
Amount of salt in mixture = 10 mg
Amount of sand in mixture = 30 mg
Find:
Amount of iron fillings in mixture
Computation:
Using Law of Conservation of mass;
Total mass of mixture = Amount of salt in mixture + Amount of sand in mixture + Amount of iron fillings in mixture
100 = 10 + 30 + Amount of iron fillings in mixture
100 = 40 + Amount of iron fillings in mixture
Amount of iron fillings in mixture = 100 - 40
Amount of iron fillings in mixture = 60 mg
PLEASE HURRY I WILK TIVE BRAINYEST
What is the weather like in a temperate grassland? (Select all that apply.)
A) summers are mild to hot
B) winters are cold
C) summers are cool
D) winters are mild
Answer:
A. Summers are mild to hot, B. Winters are cold.
The electrolyte magnesium chloride (MgCl2) will break up into how many individual particles in water (what is the i value)?
Answer:
Solid magnesium chloride is a non-conductor of electricity because the ions aren't free to move. However, it undergoes electrolysis when the ions become free on melting. Magnesium chloride dissolves in water to give a faintly acidic solution (pH = or 6).
Which is true regarding pressure?
A.) at high pressure, the molecules are moving slower and therefore hitting other particles and the sides of a container less frequently
B.) pressure is calculated by combining the amount of space an entire object takes up.
C.) pressure is calculated by averaging the kinetic energy of all particles in a container
D.) at higher pressure indicates that particles are colliding with the walls of a container more frequently
Answer:
D
Explanation:
The higher a pressure in a system the faster the molecules within it move and collide with one another due to lack of space
hydrogen chloride, hydrogen nitrate (v), sodium chloride, sodium hydroxide. Name a substance known as common salt
Answer:
C: Sodium chloride
Explanation:
Common salt is gotten when sodium atoms reacts with chlorine atoms in an exothermic reaction to form an ionic substance known as sodium chloride with the chemical formula NaCl.
Equation is;
2Na + Cl2 = 2NaCl
Looking at the options, the correct one is Sodium chloride.
Disadvantages of using cisplatin as an anti-cancer drug
Answer: The following side effects are common (occurring in greater than 30%) for patients taking Cisplatin:
Nausea and vomiting. Nausea may last up to 1 week after therapy.
Low blood counts.
Kidney toxicity.
Ototoxicity hearing loss, ringing in the ears.
Blood test abnormalities (low magnesium, low calcium, low potassium)
Explanation:
My mind is ok :')
One method of increasing the chances of particles colliding during a reaction is to...
1)decrease temperature
2) decrease concentration
3)increasing concentration
4)use a catalyst
Answer:
3
Explanation:
Increasing concentration
Please help answer this Guy's HELP it's very Important
Answer:
Explanation:
1. HCl helps breakdown,absorb and digest food and also destroy bacterias in the stomach.
2. Organic Matter promotes good soil structure and act as reservoir of nutrients in the soil.
3. The nature of the solution is Basic
Reason... Blue litmus will remain blue in a basic solution and turn Red in an acidic solution
4. There's a number of test available for her to use but preferably... She should use the Litmus paper test. That's easier. An acidic solution will Turn a blue litmus red while the blue litmus will retain its blue color in a basic solution.