Answer:
Approximately 11460 Years Old
Explanation:
i looked this up :/
way to much maths for me
The age of the bone given that it contains C-14 and N-14 in ratio of 1:3 is 11460 years
How to determine the percentage remainingC-14 is usually used for radioactive dating (i.e to determine the aga of substance)
From the question, C-14 and N-14 exist in ratio of 1:3.
thus, the amount of C-14 remaining can be obtained as follow:
Ratio of C-14 = 1Ratio of N-14 = 3Total ratio = 1 + 3 = 4Percentage of C-14 remaining =?Percentage of C-14 remaining = 1/4 × 100
Percentage of C-14 remaining = 25%
How to determine the number of half-lives that has elapsedOriginal amount (N₀) = 100%Amount remaining (N) = 25%Number of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 100 / 25
2ⁿ = 4
2ⁿ = 2²
n = 2
How to determine the ageHalf-life of C-14 (t½) = 5730 yearsNumber of half-lives (n) = 2Time (t) = ?t = n × t½
t = 2 × 5730
t = 11460 years
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Give some examples of what are sand good for explaining is involved!
Explanation:
The definition of a god is an image, person or thing that is worshiped, honored or believed to be all-powerful or the creator and ruler of the universe. An example of a god is Ganesha, a Hindu diety.
. What is the relationship between the speed of impact and the dropping height?
The relation between the speed of impact and the dropping height is
[tex]\rm h =\dfrac{1}{2g}v^2[/tex]
What is Speed of Impact ?It is defined as the speed of an object when it falls from a height and makes an impact with the ground or any other object.
As the object is falling from the height , its velocity will be continuously changing
Assuming it has no initial velocity , u = 0
let the final velocity is [tex]\rm v_f[/tex] = [tex]\rm \sqrt {2gh}[/tex]
the potential energy at the height h as mgh
the kinetic energy when it reaches the bottom as [tex]\rm \dfrac{1}{2}mv^2[/tex]
As the energy is always conserved
[tex]\rm mgh = \dfrac{1}{2}mv^2[/tex]
[tex]\rm h =\dfrac{1}{2g}v^2[/tex]
This is the relation between the speed of impact and the dropping height.
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i hope someone can help me here please don't answer nonsense
Answer:
4560 torr
Explanation:
PV = K
4 x 1.5 = k
k = 6
V = k / p
V = 6 / 1
V = 6
atm to torr = 1 to 760
760 x 6 = 4560
Answer:
4560 Torr
Explanation:
Boyle's Law
[tex]\sf P_1 \cdot V_1=P_2 \cdot V_2[/tex]
where:
[tex]\sf V_1[/tex] = initial volume[tex]\sf V_2[/tex] = final volume[tex]\sf P_1[/tex] = initial pressure[tex]\sf P_2[/tex] = final pressureGiven:
[tex]\sf V_1[/tex] = 4 L[tex]\sf V_2[/tex] = 1 L[tex]\sf P_1[/tex] = 1.5 atmSubstituting the given values into the formula:
[tex]\implies \sf 1.5 \cdot 4=P_2 \cdot 1[/tex]
[tex]\implies \sf P_2=6\:atm[/tex]
To convert atm to Torr, multiply atm by 760:
[tex]\implies \sf P_2=6\cdot 760=4560\:Torr[/tex]
229.2 g of tin was heated from 46.3 to 115.7°C. How much energy was used to heat tin? (Specific heat capacity of Sn is 0.222 J/g x °C)
3531.23 J is the energy used to heat tin when 229.2 g of tin was heated from 46.3 to 115.7°C.
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
Q=mcΔT
Give data:
m=229.2 g
c=0.222 J/g x °C
ΔT=115.7°C - 46.3°C
ΔT= 69.4 °C
Putting value in the equation:
Q=mcΔT
Q=229.2 g x 0.222 J/g°C x 69.4 °C
Q= 3531.23 J
Hence, 3531.23 J is the energy used to heat tin.
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For the function F(x) = 1, which of these could be a value of F(x) when x is
close to zero?
Answer:
A. -10,000
Explanation:
When x approaches zero, the graph tells us that F(x) either becomes extremely large or extremely small. The best answer is therefore A: -10,000. Best, because we aren't given the exact value of x, but clearly the other results require that x be greater than 1 or less than -1, which is far from zero.
A sealed container can hold
0.325 L of gas at 1.00 atm
and 293 K. How many moles of gas
can the container hold?
0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.
What is an ideal gas equation?The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.
Given data:
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
V=5 L
P = 1.05 atm
T = 296 K
Putting value in the given equation:
[tex]\frac{PV}{RT}=n[/tex]
[tex]n= \frac{1.05 atm\; X \;5 L}{ 0.08206 L.atm / mol K X 296 K}[/tex]
Moles = 0.216 moles
Hence, 0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.
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Answer:
0.014
Explanation:
Use the formula PV=nRT; there are calculators for it online as well.
What's the answer to this question? pls find it asap now
Answer:
B. Mixing a few teaspoons of salt into the water
Explanation:
Pure water doesn't contain any ions, therefore it cannot conduct electricity. Adding salt (NaCl) to the water causes the salt to ionize into Na⁺ and Cl⁻ ions, and the movement of the ions completes the circuit, causing the bulb to glow.
what is the wavelength of a microwave with a frequency of 2450 mhz
Answer:
See below
Explanation:
The way to calculate this
speed of light = wavelength * frequency
3 x 10 ^8 m/s = wavelength * 2450000000 Hz
wavelength = .12245 meters
= 1.2245 x 10^-1 Meters
The wavelength of a microwave with a frequency of 2450 mhz is 1.2245 x 10⁻¹ meters.
What is wavelength?The wavelength is the time period or spatial period between the periodic wave and the distance between two waves. A microwave is a form of electromagnetic radiation.
The frequency of a microwave, f = 2450 MHz
We need to find the wavelength and the period of the microwaves
c = f λ
c = speed of light = 3 x 10 m/sec. 8 c = λf where λ = wavelength, f = frequency. Length
The relation between the wavelength and frequency is given by
The speed of light = wavelength x frequency
3 x 10⁸ m/s = wavelength x 24500 Hz
Wavelength = .12245 meters
1.2245 x 10⁻¹ Meters
Therefore, the wavelength of a microwave with a frequency of 2450 MHz is 1.2245 x 10⁻¹ meters.
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7.0 mol Mn reacts with 5.0 mol
O2 according to the equation below:
2Mn + O₂ → 2MnO
How many moles of MnO form from
5.0 mol Mn?
[?] mol MnO
Round your answer to the tenths place.
5 moles of MnO form from 5.0 mol Mn. Details about stoichiometry can be found below.
How to calculate number of moles?The number of moles of a substance can be calculated stoichiometrically as follows:
According to this question, the following chemical equation is given as follows:
2Mn + O₂ → 2MnO
2 moles of Mn forms 2 moles of MnO
Hence, 5 moles of Mn will form 5 × 2/2 = 5 moles of MnO.
Therefore, 5 moles of MnO form from 5.0 mol Mn.
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Answer: 10.0
Explanation: i took the test
Which of the following is an example of a testable scientific hypothesis?
A.
Why do plants grow better in the Sun than in the shade?
B.
Gorillas are happier in the wild than they are in the zoo.
C.
Roses grow faster in the Sun than in the shade.
can y'all please help me with this
Answer:
C=8,H=8 and O =3
Explanation:
As the formula is given.
what are the 3 common gases that give off reactions?
The 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.
What are off reactions
Off reactions are defined as chemical reactions that occurs when something burns or during combustion of materials which gives off energy.
Some gases that give off reaction are:
Hydrogen sulfideCarbon monoxideNitrogen oxidesNote that these gases are mostly poisonous.
Therefore, the 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.
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What is the mass of 0.20 mole of glucose C6H12O6?
a. 230 g
b. 36 g
c. 23 g
d. 4.6 g
Answer:
answer will be b
Explanation:
mole is given 0.20
you have to find mass so just convert it into mass
remember if you move away from mole you multiply and if you move towards mole you divide so
just multiply mole with molar mass of glucose
so
0.20×180 = 36 grams
simple keep learning.......
Ripening is a _______________ and spoiling is a ______________.
A. Chemical reaction, chemical reaction.
B. Physical reaction, chemical reaction.
C. Physical reaction, physical reaction.
D. Chemical reaction, physical reaction.
Answer:
A
Explanation:
The answer to this question is A. Both ripening and spoiling are chemical reactions.
Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.
Ripening of fruits is a chemical change. For example the colour could change as well as the texture.
Answer:
option a) chemical reaction, chemical reaction.
Explanation:
Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.
Name 20 chemical changes in our daily environment
Answer:
chemical reactions In our daily environment are
1) Cooking food
2) Photosynthesis
3) rusting
4) painting
5) respiration
6) combustion
7) Electrochemistry (including chemical batteries)
8)Digestion
9)Soap and detergent reactions
10)Acid-base reactions
11) fermentation
12) oxidation
13 ) burning of paper
14) riping of fruits
15) frying egg
16) souring of milk
17) baking
18) heating sugar
19) burning wood
20) rising bread
Ca is an atom. Why?
Help me asap pleased
Answer:
It has protons, neutrons and electrons
How many moles of hydrogen atoms are contained in one mole of[tex]C_{6}H_{12}[/tex]?
The number of moles of hydrogen atoms contained in 1 mole of c6h12 is 12.
What is hydrogen made of?Hydrogen can be produced from various domestic resources such as fossil fuels, biomass, and the electrolysis of water by electricity. The environmental sustainability and energy efficiency of hydrogen depends on how hydrogen is produced.
Hydrogen is the simplest element. Each hydrogen atom has only one proton. Hydrogen is also the most abundant element in the universe. Stars like the Sun are mainly made of hydrogen. The sun is essentially a giant sphere of hydrogen and helium gas.
Some facts about hydrogen:
Hydrogen is the most abundant element on earth. Hydrogen is an alternative fuel with a very high energy content by weight.The fuel cell can be used to power multiple applications.Fuel cells are a clean way to generate electricity.Fuel cell vehicles are very similar to traditional gasoline vehicles
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What does a particular point on a line of a phase diagram represent?
A. The pressure created by the kinetic energy of molecules at a
particular temperature
B. The maximum temperature a substance can exist at without
bonds breaking
OC. The melting point or boiling point of a substance at a specific
pressure
OD. The conditions in which temperature and pressure have equal
effects on a substance
Answer:
The point at which the lines intersect represents the triple point.
An intravenous solution is noted as having a concentration of glucose equal to 0.312 M. What volume of solution (in mL) is needed to deliver 0.078 moles of glucose to the patient?
The volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.
How to calculate volume?The volume of a solution can be calculated by using the following formula:
Molarity = n/V
Where;
n = number of molesV = volumeAccording to this question, an intravenous solution is noted as having a concentration of glucose equal to 0.312 M. The volume that will be needed is as follows:
volume = 0.078 moles ÷ 0.312M
volume = 0.25L = 250mL
Therefore, the volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.
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Identify the reaction type for each unrelated, radical reaction as either initiation, propagation, or termination. Reaction A. A chlorine chlorine bond splits into two chlorine radicals. What type of reaction is reaction A
A is the initial reaction when a chlorine bond splits into two chlorine radicals.
What are radicals?In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.
The question is based on Radical Chain Reaction. And these reactions have three different phases: Initiation, Propagation and Termination.
Reaction A- Initiation
Reaction B- Termination
Reaction C- propagation
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Pls someone smart complete the matching
Can someone help me please
Answer:
4) x = 4Explanation:
Using Intersecting Chords Theorem,
AB × CB = BE × BD
( 4x + 2) × 8 = 9 × ( 4x ) 32x + 16 = 36x16 = 36x -32x (Subtract)16 = 4x (Divide both sides by 4)x = 16/ 4 (Divide)x = 4--------------------------explain why nickel has a high density.
Density Of A Nickel:-
8.902 (25°C)
Explanation of why does nickel have a high density:-
Nickel is the only element named after the devil. The name comes from the German word Kupfernickel, meaning "Old Nick's copper," a term used by German miners. They tried to remove copper from an ore that looked like copper ore, but they were unsuccessful. ... Nickel is also used in the manufacture of many other alloys.
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4. T or F X-rays, ultraviolet light, and gamma rays all can travel through interplanetary space, so they are examples of waves.
5. What happens to the amplitude of water waves as you get farther from the disturbance that caused them? Why?
4. True
5. The amplitude of the ripples decreases as the circumference of the circle increases.
What is a wave?A wave is a disturbance that moves energy from one place to another.
Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each travelling in a wave-like pattern at the speed of light. Hence, the statement is true.
As the disturbance moves outwards the energy it carries is spread over a larger and larger region called the wavefront. For example, the ripples in the water lie in a circle with an ever-increasing circumference. The amplitude of the ripples decreases as the circumference of the circle increases.
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Based on our consumption of fossil fuels today, what can be predicted will eventually occur? Select all that apply
Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.
What are fossil fuels ?Fossil fuels are made from decomposing plants and animals.
These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.
Coal, oil, and natural gas are examples of fossil fuels.
Above given fossil fuels are expected to be used up and a new energy developed to supply energy needs of the world.
Therefore, Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.
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Fast food and juice boxes are example of which of these?
group of answer choices
habitat destruction
air pollution
water pollution
overpackaging
i need a answer within 20 mins i will give 30 points
Answer:
habitat destruction I think
Explanation:
the screenshts below
Answer:
yes so for example one
Explanation:
yeah so
Mr. Auric Goldfinger, criminal mastermind, intends to smuggle several tons of gold across international borders by disguising it as lumps of iron ore. He commands his engineer minions to form the gold into little spheres with a diameter of exactly
8 cm and paint them black.
However, his chief engineer points out that customs officials will surely notice the unusual weight of the "iron ore" if the balls are made of solid gold (density
). She suggests forming the gold into hollow balls instead , so that the fake "iron ore" has the same density as real iron ore
One of the balls of fake "iron ore," sliced in half.
Calculate the required thickness of the walls of each hollow lump of "iron ore." Be sure your answer has a unit symbol, if necessary, and round it to 2
significant digits.
The thickness of the walls of each hollow lump of iron ore is: 0.295cm. This is determined using the knowledge of the Volume of a Hollow Sphere.
What is the Volume of a Hollow Sphere?
The formula for the Volume of a Hollow Sphere is give as:
Volume of a Hollow = 4/3 R³ – 4/3 r³
Step 1 - Find the apparent volume of 8cm diameter sphere including the wall the the hollow inside
V = 4/3 r³
V = (4/3) (8)³
V = (4/3) * (22/7) * 512
V = 2145.52cm³
Step 2 - Determine the mass of Gold required for the sphere to achieve the density of iron ore if the apparent volume is as given in Step 1 above.
Recall that Mass = Density * Volume
Mass = 5.15 * 2145.52
Mass = 11049.45
Step 3 - Find volume of gold based on mass calculated in Step 2 above
Recall that :
Volume = Mass/Density
Thus,
V = 11049.4/19.3
Thus, Volume = 572.51cm³
Step 4 - Find the width of the wall of a hollow sphere for the volume realized in step 3
Recall the initial formula:
Volume of a Hollow = 4/3 R³ – 4/3 r³
Thus, 572.51 = (4/3) (8³ - (8 - t)³)
572.51 = (4/3) *(22.7) *(8³ - (8 - t)³)
572.51 = (88/21) *(8³ - (8 - t)³)
Multiply both sides by 21 and we have
88 (512 - (8 - t)³) = 12,022.71
Simplify further
(8 - t)³ = 357.38
t = 0.9035cm
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A solution is 0.225M Na2SO4. What is the molarity of the sodium ion in solution
The molarity of the sodium ion in the solution is 0.450 M.
How do we determine the molarity of sodium ions in a solution?The molarity of the sodium ion in a solution can be determined by the dissociation of the given solution Na2SO4(sodium sulfate).
The dissociation of Na2SO4 is computed as follows:
1 mole of Na2SO4 dissociates to give 2 moles of sodium cations and 1 mole of sulfate anion.i.e.
[tex]\mathbf{Na_2SO_4 \to 2Na^{+} + SO_4^{2-}}[/tex]
The molarity for sodium-ion [Na+] is:
= 2 × 0.225 M
= 0.450 M
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A student placed equal-sized potato cubes in two different beakers containing either distilled (pure) water or a concentrated sugar solution. The experiment is shown in Figure 2.
Explain
what would happen to the mass of the potato cube after being placed in distilled (pure) water
Please help me
When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.
What is the meaning of concentrated?
The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution.
When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.
Since potatoes already contain sugar, less water will diffuse out of the potato placed in sugar water. The slice placed in water will be rigid since it will absorb water.
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