Answer:
humans have a huge impact on all spheres. if you negatively impact the spheres, such as burning fossil fuels, it'll pollute the atmosphere.
Explanation:
All four spheres of Earth are susceptible to human influence. Burning fossil fuels can cause pollution to be released into the atmosphere. Garbage accumulated by humans in landfills has an impact on the geosphere. Human waste enters waterways and has an effect on the hydrosphere.
What is geosphere ?Different definitions of the geosphere have conflicting uses. It can be used to refer to the atmosphere, lithosphere, hydrosphere, and cryosphere as a whole. Different mass and/or energy flows can be exchanged between the various geosphere collectives.
Land erosion and soil movement currently result from human activity more frequently than from any natural mechanism. Human-caused air and water pollution has a negative impact on the environment, rivers, and lakes, harming both other animals and people's health.
According to some scientists, humans have their own sphere, the "anthrosphere." But for the purposes of this module, people will also be considered a component of the biosphere.
Thus, Garbage accumulated by humans in landfills has an impact on the geosphere.
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The atomic mass of an element is:
A. The number of protons and electrons
B. The number of protons and neutrons
Explanation:
it b
....
hope it helps!
Which gas law is represented by the following equation: P1/T1 = P2/T2
O none of these
Avogadro's law
Charles's law
Gay-Lussac's law
Boyle's law
Answer:
none of these
Explanation:
The expression:
P1/T1 = P2/T2 is a derivative of the combined gas law.
From the combination of the Boyle's and Charles's law, if the volume is taken to be constant, the pressure of the given mass of gas is directly proportional to the absolute temperature.
This is how the expression
P1/T1 = P2/T2 was obtained.
The teal line of the hydrogen emission spectrum has a wavelength of 486.0 nm.486.0 nm. Calculate the energy of one photon of this light.
Answer:
4.086 × 10⁻¹⁹ J
Explanation:
Step 1: Given and required data
Wavelength of the teal line of the hydrogen emission spectrum (λ): 486.0 nmSpeed of light (c): 2.997 × 10⁸ m/sPlanck's constant (h): 6.626 × 10⁻³⁴ J.sStep 2: Convert "λ" to meters
We will use the conversion factor 1 m = 10⁹ nm.
486.0 nm × 1 m/10⁹ nm = 4.860 × 10⁻⁷ m
Step 3: Calculate the energy of one photon of this light
We will use the Planck-Einstein's relation.
E = h × c / λ
E = 6.626 × 10⁻³⁴ J.s × 2.997 × 10⁸ m/s / 4.860 × 10⁻⁷ m
E = 4.086 × 10⁻¹⁹ J
If the specific heat of water is 4.184 J/g∙°C, how much heat is required to increase the temperature of 1.500g of water from 23 °C to 39 °C? (show your work) Units count
Answer:
Q = 100.42 J
Explanation:
Given data:
Mass of water = 1.500 g
Specific heat capacity of water = 4.184 J/g.°C
Heat required = ?
Initial temperature = 23°C
Final temperature = 39°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 39°C - 23°C
ΔT = 16°C
Q = 1.500 g× 4.184 J/g.°C ×16°C
Q = 100.42 J
7. If a person wanted to become a physicist, besides physics what other courses of study would be essential areas of study? O medicine, biotechnology, genetics, and pharmacology O mathematics, statistics, logic, and computer science O chemistry, physics, astronomy, and earth science biology, paleontology, biochemistry, and zoology
Answer:
paleontologist is the best i can say you
Every cell in an organism has the same number of chromosomes, except:
A.)Skin cells
B.)Neurons
C.)White blood cells
D.)Reproductive cells
Answer: omg this is so old! :D but its D!
Explanation:
The cells that has been composed of the indifferent number chromosomes as compared to other cells have been reproductive cells. Thus, option D is correct.
Cells have been the smallest and the unit of life. The cells have been composed of the pairs of chromosomes in higher organisms. There has been the presence of 46 chromosomes i.e. 23 pairs of chromosome. However, the chromosomes in the cell have been diploid i.e. in set of 2.
The reproductive cells have been resulted in the formation of the new cells. So they have been consisted of the cells with the half the number of chromosomes and are haploid in nature.
Thus, the cells that have different number of chromosomes as compared to the other cells have been reproductive cells. Thus, option D is correct.
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Water changes its state of matter when heat is added or taken away. When water evaporates, the particles in the water vapor
As that liquid water is further heated, it evaporates and becomes a gas—water vapor.
What is evaporation?When a liquid transitions from the liquid phase to the gas phase, evaporation, a sort of vaporization, takes place on the liquid's surface. High concentrations of the evaporating substance in the surrounding gas considerably slow down evaporation, as is the case when humidity impacts the rate of water evaporation.
The way that the liquid's molecules clash determines how much energy is transferred to one another. In order to leave and enter the surrounding air as a gas, a molecule close to the surface must absorb enough energy to outperform the vapor pressure. Evaporative cooling is the process of reducing a liquid's temperature as a result of evaporation, which removes energy from the evaporated liquid.
The majority of the liquid's molecules only hold a small portion of the heat energy needed.
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A 2.89 g sample of a metal chloride, MCl2, is dissolved in water and treated with excess aqueous silver nitrate. The silver chloride that formed weighed 6.41 g. Calculate the molar mass of M. Question 3 options: 70.9 g/mol 29 g/mol 58.0 g/mol 65 g/mol 72.4 g/mol
Answer:
58.0 g/mol
Explanation:
The reaction that takes place is:
MCl₂ + 2AgNO₃ → 2AgCl + M(NO₃)₂First we calculate how many moles of silver chloride were produced, using its molar mass:
6.41 g AgCl ÷ 143.32 g/mol = 0.0447 mol AgClThen we convert AgCl moles into MCl₂ moles, using the stoichiometric ratio:
0.0447 mol AgCl * [tex]\frac{1molMCl_2}{2molAgCl}[/tex] = 0.0224 mol MCl₂Now we calculate the molar mass of MCl₂, using the original mass of the sample:
2.86 g / 0.0224 mol = 127.68 g/molWe can write the molar mass of MCl₂ as:
Molar Mass MCl₂ = Molar Mass of M + (Molar Mass of Cl)*2127.68 g/mol = Molar Mass of M + (35.45 g/mol)*2Finally we calculate the molar mass of M:
Molar Mass of M = 57 g/molThe closest option is 58.0 g/mol.
Metallic tantalum crystallizes in a body-centered cubic lattice, with one Ta atom per lattice point. If the edge length of the unit cell is found to be 328 pm, what is the metallic radius of Ta in pm
Answer:
The radius of the atom Ta is 142pm
Explanation:
To solve this question we need to know that for a body-centered cubic lattice we have the equations:
X = 4/√3 R
Where X is edge length and R is radius of the atom in the lattice.
If adge length of unit cell is 328 pm:
328pm = 4/√3 R
328pm * √3 / 4 = R
142pm = R
The radius of the atom Ta is 142pm
Which of the following is the last part of the technological design process
Answer:
Communicate the final solution
This concludes the Technological Design Process.
Conversions
If you traded (converted)
15 Skittles for M&Ms,
how many M&Ms do you
have?
Conversion Factor
6 Skittles 4 Cookies
1 Cookies = 2 M&Ms
If you traded (converted) 15 Skittles for M&Ms, you will have 20 M&Ms
How to convert 15 Skittles to cookiesWe'll begin by converting 15 Skittles to cookies. This can be obtained as follow:
6 Skittles = 4 Cookies
Therefore,
15 Skittles = (15 Skittles × 4 cookies) / 6 skittles
15 Skittles = 10 cookies
How to convert 10 cookies to M&MsWe can convert 10 cookies to M&Ms as follow:
1 Cookies = 2 M&Ms
Therefore,
10 cookies = (10 cookies × 2 M&Ms) / 1 Cookies
10 cookies = 20 M&Ms
Thus, 15 Skittles is equivalent to 20 M&Ms
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Which substances are subject to avogadro law?
Answer:
Avogadro's law (sometimes referred to as Avogadro's hypothesis or Avogadro's principle) is an experimental gas law relating the volume of a gas to the amount of substance of gas present.[1] The law is a specific case of the ideal gas law. A modern statement is:
Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."[1]
For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
The law is named after Amedeo Avogadro who, in 1812,[2][3] hypothesized that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules. As an example, equal volumes of molecular hydrogen and nitrogen contain the same number of molecules when they are at the same temperature and pressure, and observe ideal gas behavior. In practice, real gases show small deviations from the ideal behavior and the law holds only approximately, but is still a useful approximation for scientists.
I hope helps you and if you want and you consider you can give me a brainly crown
Is my answer correct?
Can someone explain how to get the right net ionic equation
Answer:
Option D.
2Ag⁺(aq) + Ni(s) —> 2Ag(s) + Ni²⁺(aq)
Explanation:
From the question given above:
Ni(s) —> Ni²⁺(aq) + 2e¯
Ag⁺(aq) + e¯ —> Ag(s)
We can obtain the net ionic equation by combining both equation as shown below:
Ag⁺(aq) + e¯ + Ni(s) —> Ag(s) + Ni²⁺(aq) + 2e¯
Next, we shall balance the equation. This can be obtained as follow:
Ag⁺(aq) + e¯ + Ni(s) —> Ag(s) + Ni²⁺(aq) + 2e¯
There are 2 atoms of e¯ on the right side and 1 atom on the left side. It can be balance by putting 2 in front of e¯ as shown below:
Ag⁺(aq) + 2e¯ + Ni(s) —> Ag(s) + Ni²⁺(aq) + 2e¯
Next, we shall balance the charge on both sides. This is illustrated below:
TOTAL charge on the left = +1 + (–2)
= 1 – 2
= –1
TOTAL charge on the right side = +2 + (–2)
= 2 – 2
= 0
Thus, to balance the charge, put 2 in front of Ag⁺ as shown below:
2Ag⁺(aq) + 2e¯ + Ni(s) —> Ag(s) + Ni²⁺(aq) + 2e¯
There are 2 atoms of Ag on the left side and 1 atom on the right side. It can be balance by putting 2 in front of Ag as shown below:
2Ag⁺(aq) + 2e¯ + Ni(s) —> 2Ag(s) + Ni²⁺(aq) + 2e¯
Next, cancel out 2e¯ from both side to obtain the net ionic equation. Thus, we have:
2Ag⁺(aq) + Ni(s) —> 2Ag(s) + Ni²⁺(aq)
Dianabol is one of the anabolic steroids composed of only C, H, and O that has been used by some
athletes to increase the size and strength of their muscles. A 14.765 g sample of Dianabol is burned,
and 43.257 g CO₂ and 12.395 g H₂O are formed. In a second experiment, the molecular mass of
Dianabol is found to be 300.44 g/mol. What is the molecular formula for Dianabol?
The Molecular formula of the compound is C₂₀H₂₈O₂
What is the Molecular formula of the compound?The Molecular formula is determined as follows from the equation of the reaction as follows:
Molecular formula = (empirical formula)ₙCxHyOz + O₂ → x CO₂ + y/z H₂O
mass of CO₂ produced = 43.257 g
moles of C in the sample = 43.257/44 = 0.983 moles
mass of C in the sample = 0.983 * 12 = 11.796
mass of H₂O produced = 12.395 g
moles of H in the sample = 12.395/18 * 2 = 1.377 moles
mass of H in sample = 1.377 g
mass of oxygen in the sample = 14.765 g - (11.796 g + 1.377 g)
mass of oxygen in the sample = 1.598
moles of oxygen = 1.598/16 = 0.0999 moles
Ratio of C : H : O = 0.983 : 1.377 : 0.0999
Ratio of C : H : O = 10 : 14 : 1
Empirical formula of compound = C₁₀H₁₄O
Empirical mass = 150 g
Molecular mass = empirical mass * n
n = molecular mass/empirical mass
n = 300.44/150
n = 2
From the formula;
Molecular formula = (empirical formula)ₙ
Molecular formula = (C₁₀H₁₄O)₂
Molecular formula =C₂₀H₂₈O₂
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PLEASE HELP!!!!!!!!!
The average atomic mass of the imaginary element : 47.255 amu
Further explanationThe elements in nature have several types of isotopes
Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
Mass atom X = mass isotope 1 . % + mass isotope 2.% ..
isotope E-47 47.011 amu, 87.34%
isotope E-48 48.008 amu, 6.895
isotope E-49 50.009 amu, 5.77%
The average atomic mass :
[tex]\tt avg~mass=0.8734\times 47.011+0.06895\times 48.008+0.0577\times 50.009\\\\avg~mass=41.059+3.310+2.886\\\\avg~mass=47.255~amu[/tex]
Calculate the molar mass of menthol, C10H20O
Answer:
C10H200
Explanation:
The molecular formula C10H20O (molar mass : 156.27 g/mol) may refer to: Citronellol. Decanal.
The molar mass of menthol ([tex]\rm C_10H_{20}O[/tex]) is 156.3 g/mol.
To calculate the molar mass of menthol ([tex]\rm C_10H_{20}O[/tex]), we need to determine the sum of the atomic masses of all the individual atoms in the compound.
The atomic masses of the elements are as follows:
C (carbon) = 12.01 g/mol
H (hydrogen) = 1.01 g/mol
O (oxygen) = 16.00 g/mol
Now, let's calculate the molar mass of menthol:
Molar mass of menthol = (10 * molar mass of C) + (20 * molar mass of H) + (1 * molar mass of O)
= (10 * 12.01 g/mol) + (20 * 1.01 g/mol) + (1 * 16.00 g/mol)
= 120.1 g/mol + 20.2 g/mol + 16.0 g/mol
= 156.3 g/mol
Therefore, the molar mass of menthol ([tex]\rm C_10H_{20}O[/tex]) is 156.3 g/mol.
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1. A football player throws a football 30 meters/second2 using 600 Newtons of force What
was the mass of the football?
Answer:
20 kgExplanation:
The mass of the football can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{600}{30} = \frac{60}{3} \\ [/tex]
We have the final answer as
20 kgHope this helps you
5. Using one of those fancy capipers I demonstrated in class, I measure the sides of a cube as 6.8 cm, by 6.83 cm, by 9.37 cm. The formula for volume is: V = length X width x height. Using significant digits, what is the best answer you can come up for the volume of the cube?
Answer:
[tex]435.18\ cm^3[/tex]
Explanation:
[tex]From\ the\ measurements\ by\ the\ caliper,\\The\ length\ of\ the\ cube=6.8\ cm\\The\ breadth\ of\ the\ cube=6.83\ cm\\The\ height\ of\ the\ cube=9.37\ cm\\Hence,\\As\ we\ know\ that\ Volume\ of\ the\ cuboid=lbh\\Hence,\\Volume\ of\ the\ cube=6.8*6.83*9.37\\Volume\ of\ the\ cube=435.18\ cm^3\\[/tex]
What volume of 0.26 M H2SO4 can be prepared by diluting 125 mL of 5.1 M H2SO4?
______L
Answer:
2451.9 ml
Explanation:
M1V1 = M2 V2
M1 = 5.1M
V1 = 125ml
M2=0.26M
V2= ?
V2= M1 V1/M2
V2 = 5.1*125/0.26
V2 = 2451.9 ml
4 Nitrogen monoxide reacts with oxygen like this:
2NO(gas) + O2(gas) -> 2NO2 (gas)
a. How many moles of oxygen molecules react
with I mole of nitrogen monoxide molecules?
b. What volume of oxygen will react with
50 cm of nitrogen monoxide?
c. Using the volumes in b, what is:
i. the total volume of the two reactants?
ii. the volume of nitrogen dioxide formed?
a. mol O₂=0.5
b. volume O₂ = 25 cm³
c. i. the total volume of the two reactants = 75 cm³
c. ii. the volume of nitrogen dioxide formed = 50 cm³
Further explanationReaction
2NO(gas) + O₂(gas) ⇒ 2NO₂ (gas)
a.
mol NO = 1
From the equation, mol ratio NO : O₂ = 2 : 1, so mol O₂ :
[tex]\tt \dfrac{1}{2}\times 1=0.5[/tex]
b.
From Avogadro's hypothesis, at the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles
Because mol ratio NO : O₂ = 2 : 1, so volume O₂ :
[tex]\tt \dfrac{1}{2}\times 50~cm^3=25~cm^3[/tex]
c.
i. total volume of reactants : 25 cm³+ 50 cm³=75 cm³
ii. the volume of nitrogen dioxide formed :
mol ratio NO : NO₂ = 2 : 2, so volume NO₂ = volume NO = 50 cm³
The law of conservation of mass can be demonstrated by a chemical reaction. Which of the
following models of a chemical reaction best represents the law of conservation of mass?
Answer : It’s C.
Cccccccccccccccccccccccccccccccccccccccc
The model of the chemical reaction that best represent the law of conservation of mass is the model with a balanced equation.
The correct answer to the question is the third option.
The law of conservation of matter states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.The statement above, suggest that unbalanced equation simply means matter has been created or destroyed.
Therefore, the correct answer to the question given above will be the option in which the equation is balanced.
The option with a balanced equation is the third option.
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Next the strontium hydroxide solution prepared in part (a) is used to titrate a nitric acid solution of unknown concentration.Write a balanced chemical equation to represent the reaction between strontium hydroxide and nitric acid solutions.
Answer:
Sr(OH)₂(aq) + 2 HNO₃(aq) ⇒ Sr(NO₃)₂(aq) + 2 H₂O(l)
Explanation:
Let's consider the unbalanced molecular equation between strontium hydroxide and nitric acid solutions. This is a neutralization reaction, since an acid reacts with a base to form a salt and water.
Sr(OH)₂(aq) + HNO₃(aq) ⇒ Sr(NO₃)₂(aq) + H₂O(l)
We have 2 N atoms on the right side, so we have to multiply HNO₃ by 2.
Sr(OH)₂(aq) + 2 HNO₃(aq) ⇒ Sr(NO₃)₂(aq) + H₂O(l)
Finally, to get the balanced equation we will multiply H₂O by 2.
Sr(OH)₂(aq) + 2 HNO₃(aq) ⇒ Sr(NO₃)₂(aq) + 2 H₂O(l)
The balanced chemical equation can be given as:
[tex]\rm \bold{Sr(OH)_2\;+\;2\;HNO_3\;\rightarrow\;Sr(NO_3)_2\;+\;2\;H_2O}[/tex]
The reaction between strontium hydroxide and nitric acid has been the neutralization reaction. The reaction results in the formation of the salt along with the water molecules.
The reaction can be given as:
[tex]\rm Sr(OH)_2\;+\;HNO_3\;\rightarrow\;Sr(NO_3)_2\;+\;H_2O[/tex]
The balanced chemical equation has been the one in which the number of atoms of each element has been equal on both the product and the reactant side.
The balanced chemical equation can be given as:
[tex]\rm Sr(OH)_2\;+\;2\;HNO_3\;\rightarrow\;Sr(NO_3)_2\;+\;2\;H_2O[/tex]
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What volume (in mL) of 0.51 M H2SO4(aq) solution is necessary to completely react with 103 mL of 0.36 M KOH(aq)
Answer: 36.3 ml
Explanation:
According to the neutralization law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1[/tex] = basicity [tex]H_2SO_4[/tex] = 2
[tex]M_1[/tex] = molarity of [tex]H_2SO_4[/tex] solution = 0.51 M
[tex]V_1[/tex] = volume of [tex]H_2SO_4[/tex] solution = ?
[tex]n_2[/tex] = acidity of [tex]KOH[/tex] = 1
[tex]M_1[/tex] = molarity of [tex]KOH[/tex] solution = 0.36 M
[tex]V_1[/tex] = volume of [tex]KOH[/tex] solution = 103 ml
Putting in the values we get:
[tex]2\times 0.51\times V_1=1\times 0.36\times 103[/tex]
[tex]V_1=36.3ml[/tex]
Therefore, volume of [tex]H_2SO_4[/tex] required is 36.3 ml
Which atom would be expected to have a half-filled 6s subshell
Answer: I think the answer is Cesium (Cs)
Explanation:
A half-filled 6s subshell would be 6s^1
What volume of 0.220 M HBr solution (in mL) is required to obtain 0.060 moles of HBr?
Answer:
273 mL.
Explanation:
From the question given above, the following data were obtained:
Molarity of HBr = 0.220 M
Mole of HBr = 0.060 mole
Volume =?
Molarity is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:
Molarity = mole /Volume
With the above formula, we can obtain the volume required as illustrated below:
Molarity of HBr = 0.220 M
Mole of HBr = 0.060 mole
Volume =?
Molarity = mole /Volume
0.220 = 0.060 / Volume
Cross multiply
0.220 × Volume = 0.060
Divide both side by 0.220
Volume = 0.060 / 0.220
Volume = 0.273 L
Finally, we shall convert 0.273 L to millilitres (mL). This can be obtained as follow:
1 L = 1000 mL
Therefore,
0.273 L = 0.273 L × 1000 mL / 1 L
0.273 L = 273 mL
Thus, 0.273 L is equivalent to 273 mL.
From the calculations made above, 273 mL of HBr is required.
The volume of 0.220 M HBr solution (in mL) required to obtain 0.060 moles of HBr is 272.7mL
From the question,
We are to determine the volume of 0.220M HBr solution that is required to obtain 0.060 moles of HBr.
To determine this, we will use the formula connecting number of moles, concentration and volume
From the formula,
Number of moles = Concentration × Volume
Then,
[tex]Volume = \frac{Number \ of \ moles}{Concentration}[/tex]
From the question,
Concentration of the HBr solution = 0.220 M
Required number of moles of HBr = 0.060 moles
∴ [tex]Volume \ of \ HBr \ required = \frac{0.060}{0.220}[/tex]
Volume of HBr required = 0.272727 L
Now, we will convert this to milliliter (mL)
(NOTE: 1L = 1000 mL)
∴ 0.272727 L = 0.272727 × 1000 mL
= 272.727 mL
≅ 272.7 mL
Hence, the volume of 0.220 M HBr solution (in mL) required to obtain 0.060 moles of HBr is 272.7mL
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8.67 x 1018 atoms Zn
calculate the number of representative particles or moles for each of the following
Multiply the no. of moles with Avogadro's constant which is 6.02*10^23
the mole ratio of Zinc * Avogadro's constant *8.67*1018
this should help you get what you want
The stem and leaves of the plant in the diagram above are exhibiting which behavior?
Answer:
Try to go to quizzlet
Explanation:
Answer:
j
Explanation:
science!
What type of heat transfer takes place when a furnace heats up an entire room?
Radiation, because the element of the heater comes in contact with air in the room
Convection, because energy is carried by waves and not matter
Radiation, because heat travels in a cyclical manner
Convection, because air currents are formed
Answer:
Radiation, because the element of the heater comes in contact with air in the room. Convection, because energy is carried by waves and not matter. Radiation, because heat travels in a cyclical manner.
Explanation:
Answer:
Radiation,
Explanation:
What does it mean for a gene to be active?
Answer: You should be able to find the answer on the internet
What is the result of an unstable isotope that give off gamma radiation?
Answer:
When unisotope releases gamma radiation, it does not change the atomic number of the atom .
Explanati
. This is because gamma radiation is the emission of electromagnetic energy from the nucleus in the form of photons, discrete packets of energy.