Answer:
This location was chosen because rock salt has qualities that can withstand the negative effects of nuclear waste and prevent it from causing any harm to the biosphere and all life in it.
Explanation
How to properly dispose of radioactive waste has always been a great problem due to its very high potential to negatively affect life in every form. There have been several kinds of research into the best ways to dispose of such waste. In times past, we have seen radioactive waste sealed up in drums and disposed of. These drums are not everlasting and can be subject to accidents, weakened by weather, etc thus creating a radioactive leak.
One of the results of the research was to store such waste away far below the ground where there are deposits of rock salt.
Radioactive waste generates tremendous amounts of heat if buried in ordinary underground sites and can contaminate underground water channels with radioactive poisoning. So if it were to be buried underground, it had to be in a site that is impregnable by water with very high resistance to heat.
It has been discovered that rock salt has very high boiling and melting points which are 1413 degrees Celsius and 807 degrees Celsius respectively. This makes the ancient bed of rock salt a preferred location by the US government for storing nuclear waste.
Cheers
What is the state of matter involved in a solution and colloid
Explanation:
colloid is a mixture in which one substance of microscopically dispersed insoluble particles are suspended throughout another substance. However, some definitions specify that the particles must be dispersed in a liquid,[1] and others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). The dispersed phase particles have a diameter of approximately 1 nanometre to 1 micrometre.[
hope it helps.
Answer:
colloids are mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid ,liquid or gaseous medium .The particles of a colloid remain and do not settle due to gravity ,and they are often electrically charged
hope it helpedhow many atoms are equal to 1.5 moles of hellium
Answer:
There are 1.8×1024 atoms in 1.5 mol HCl
Explanation:
What does the line with “alternating spikes and semicircles” mean?
Answer:
The line with spikes and semicircles is a stationary front, it brings days of steady rain.
Explanation:
L means Low pressure, it brings stormy weather with strong winds.
H means High pressure, it brings fair weather and light winds.
The line with spikes is a cold weather front, it brings thunderstorms and colder
temperatures.
The line with spikes and semicircles is a stationary front, it brings days of steady rain.
i would appreciate it if someone could show me the net ionization reaction for the following equation:
CaCl2(aq) + 2NaHCO3 -> CaCO3 + 2NaCl + CO2 + H2O
thanks in advance!!
Answer:
Deduce the balanced chemical equation:
CaCO3(s) + 2HCl(aq) > CaCl2 + H2O(l) + CO2(g)
2. Write as ionic species:
Ca2+(aq) + CO3 2- (aq) + 2H+ + 2Cl- > Ca2+(aq)+ 2Cl-(aq) + H2O(l) + CO2(g)
3. Identify ions on the right that also appear on the left, and eliminate them. (As Robert Cruikshank says, these are known as ’spectator ions’ and take no overall part in the reaction):
CO3 2- (aq) + 2H+(aq) > H2O(l) + CO2(g)
This is the balanced ionic equation.
how is density related to the color of igneous rocks?
Answer:
The density of igneous rocks is related to its color. Darker colored rocks have a higher density because of its greater mineral and iron content. Its characteristics is opposite compared to lighter colored rocks that have less density because of lower mineral and iron content
(1) Complete the word equation for the complete combustion of methane in
oxygen.
→ water +
methane +
en of methane can produce carbon and
Cooled in ice to help the water vapour condense. Tube 2 – contains lime water, goes cloudy to show the presence of carbon dioxide. Word equation: (hydrocarbon + oxygen → carbon dioxide + water) Methane + oxygen → carbon dioxide + water.
is smoke a compound or a mixture? explain your answer.
Explanation:
hope it is helpful to you ☺️
9. Thallium-208 has a half-life of 3.053 min. How long will it take for 120 g of it to decay
to 7.5 g?
Answer:
12.213 minutes will be taken for 120 g-Thalium-208 to decay to 75 grams.
Explanation:
Radioactive isotopes decay exponentially in time, the mass of the isotope ([tex]m(t)[/tex]), in grams, is described by the formula in time ([tex]t[/tex]), in minutes:
[tex]m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (1)
Where:
[tex]m_{o}[/tex] - Initial mass of the isotope, in grams.
[tex]\tau[/tex] - Time constant, in minutes.
In addition, the time constant associated with the isotope decay can be described in terms of half-life ([tex]t_{1/2}[/tex]), in minutes:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (2)
If we know that [tex]m(t) = 7.5\,g[/tex], [tex]m_{o} = 120\,g[/tex] and [tex]t_{1/2} = 3.053\,min[/tex], then the time taken by the isotope is:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex]
[tex]\tau = \frac{3.053\,min}{\ln 2}[/tex]
[tex]\tau \approx 4.405\,min[/tex]
[tex]t = -\tau \cdot \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = -(4.405\,min)\cdot \ln \left(\frac{7.5\,g}{120\,g} \right)[/tex]
[tex]t \approx 12.213\,min[/tex]
12.213 minutes will be taken for 120 g-Thalium-208 to decay to 75 grams.
12.21 minutes will it take for 120 g of Thallium-208 to decay
to 7.5 g.
What is half life period?Half life period is that time in which half of the reactant is convert into product.
In the question it is given that,
Initial mass of Thallium-208 = 120g
Final mass after decay = 7.5g
And half life of this decay = 3.053 min
Here we can calculate the total time of decay by the formula : T = t × n.
Where, T = total required time
t = half life
n = no. of half life required to decompose reactant.
120 → 60 →30 → 15 → 7.5
From the above sequence it is clear that we require 4 times of half life to decompose 120g to 7.5g.
So, T = 3.053 × 4 = 12.21 minutes
Hence, 12.21 minutes will it take to decay.
To learn more about half life, visit below link:
https://brainly.com/question/2320811
3. Designing the caisson…Using technology you think would be available in the late 1800s, what could you do to keep temperatures in the caisson as low as possible? How else can you protect your workers from the dangers of high heat?
Answer:
By using insulating material.
Explanation:
By making the material cover with insulator in that way the we can protect the workers from the dangers of high heat because the insulator are the poor conductor of heat so the heat from the surrounding environment did not enter inside the metal. There are certain materials which remain cool if they receive heat from the surrounding environment so by using these types of materials can be useful on the cover of caisson to reduce heat in the inner side and protect the workers from the dangers of high heat.
What is the mass number and atomic number of Ca0
Answer:
56.0774g/mol
Explanation:
hope you like it ☺️
molecular formula of calcium oxide
Answer:
Calcium oxide, commonly known as lime, is a chemical compound with the formula CaO.
can some kind soul help me plss
convert propanamine to propylalcohol
Answer:
Yeah
Explanation:
Propylene glycol can be dehydrated to propionaldehyde which can in turn be reductively aminated to propylamine.
Propionaldehyde can be converted to n-propyl amine in two steps.
Conversion of propionaldehyde to oxime
Propionaldehyde is treated with hydroxyl amine in weakly acidic medium to form imine product known as propionaldoxime.
CH₃CH₂CHO+NH₂OH->CH₃CH₂CH=N-OH+H₂O
Reduction of imine to form amine
In this step,propionaldoxime is reduced by proper reducing agent like Na in ethanol to form n-propyl amine.
CH₃CH₂CH=NO-Na-C₂H5OH-> CH₃CH₂CH₂NH₂
Explain how the percentages of nitrogen , oxygens and carbon dioxide in the earth atmosphere today have changed from the earth
Answer:
See below
Explanation:
The atmosphere of the earth hundreds of millions of years ago was only water vapour and carbon, both from the one ocean that existed around the continental body of Pangea. The photosynthesis process and exache (⊕) caused the percentages to decrease.
Please help!!!! Best answer will get brainliest
Answer:
covalent network
Explanation:
trust me on this one
What effect does the Earth's surface have on solar radiation?
Answer:
Thus, the proportion of Earth's surface that is covered by ice and snow affects how much of the Sun's solar radiation is absorbed, warming the planet, or reflected. Therefore, snow and ice which are covered in soot from pollution no longer reflect sunlight, but absorb it and so melting increases.
Answer:
Half of the solar radiation is absorbed and converted to infrared (heat).
Explanation:
The specific heat capacities of some metals (in J g−1 K−1) are given below. Copper: 0.385 Magnesium: 1.020 Mercury: 0.138 Platinum: 0.130 If 100 kJ of heat is added to 10.0 g samples of each of the metals above, all at 25°C, determine which metal will have the smallest increase in temperature.
Answer: Magnesium metal will have the smallest increase in temperature.
Explanation:
Given: Specific heats are as follows.
Copper = 0.385 J/g K, Magnesium = 1.020 J/g K
Mercury = 0.138 J/g K, Platinum = 0.130 J/g K
Heat energy = 100 kJ (1 kJ = 1000 J) = 100000 J
mass = 10.0 g
Initial temperature = [tex]25^{o}C[/tex]
Formula used to calculate the increase in temperature for each of the given elements is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass
C = specific heat
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
The change in temperature for copper is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.385 J/g K \times (T_{2} - 25)\\T_{2} = 25999.026^{o}C[/tex]
The change in temperature for magnesium is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 1.020 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 9828.92^{o}C[/tex]
The change in temperature for mercury is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.138 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 72488.77^{o}C[/tex]
The change in temperature for platinum is calculated as follows.[tex]q = m \times C \times (T_{2} - T_{1})\\100000 = 10.0 g \times 0.130 J/g K \times (T_{2} - 25)^{o}C\\T_{2} = 76948.08^{o}C[/tex]
Thus, we can conclude that magnesium metal will have the smallest increase in temperature.
8. What is the chemical equation when calcium chloride combines with water?
Answer:
CaCI2 + H2O = Ca(OH)2 + HCI
A cylinder is labeled \"PENTANE.\" When the gas inside the cylinder is monochlorinated, five isomers of formula C5H11Cl result. Was the gas pure n-pentane, pure isopentane, pure neopentane, or a mixture of two or all three of these?
Answer:
a mixture of two these
Explanation:
The number of isomeric monochlorides depends on the structure and number of equivalent hydrogen atoms in each isomer of pentane.
n-pentane has three different kinds of equivalent hydrogen atoms leading to three isomeric monochlorides formed.
Isopentane has four different types of equivalent hydrogen atoms hence four isomeric monochlorides are formed.
Lastly, neopentane has only one type of equivalent hydrogen atoms that yields one mono chlorination product.
Hence the cylinder must contain a mixture of isopentane and neopentane which yields four and one isomeric monochlorides giving a total of five identifiable monochloride products as stated in the question.
What is the oxidation number of carbon in the compound carbon dioxide, CO2?
A) +3
B)+2
C)-3
D)+4
Answer:
the oxidation number is 4
Because both tin and carbon are members of Group 4A(14), they form structurally similar compounds. However, tin exhibits a greater variety of structures because it forms several ionic species. Predict the shape and ideal bond angle, including any deviations, for SnCl3−.
Answer:
See Explanation
Explanation:
Elements in group fourteen are mostly known to form compounds in which there are four electron domains leading to a tetrahedral electron domain geometry.
However, the presence of lone pairs affects the shape of the molecule. SnCl3− has four electron domains, three of them are bond pairs while one is a lone pair. The shape of the molecule is based on a tetrahedron, however the observed geometry is trigonal pyramidal due to the presence of the lone pair. Its bond angle is now less than the predicted 109 degrees.
Alternative fuel sources such solar and wind energy are gaining popularity and replacing fossil fuels in many applications. While there are many positive benefits to this technology, what negative impacts do they present?
Answer:
Environmental limitations.
Explanation:
The nonrenewable sources of energy include coal, oil natural gas, and nuclear power. While the renewable source of energy include tidal, solar, geothermal, and wind power. All the sources of nonrenewable energy are called fossil fuels. There are many positives of this alternate energy such as clean and clear energy. Though there may be some negative impacts such as land use changes for setting up solar panels, and windmill farms. These techniques are costly to maintain and implement in all sectors.An artificial biosphere is an enclosed area that contains the elements necessary for human life to exist. Suppose scientists want to develop an artificial biosphere on a new planet. The new planet has an atmosphere that is 96% carbon dioxide with only trace amounts of oxygen. What could humans do to make enough oxygen to survive? Explain your answer.
Answer:
See Explanation
Explanation:
A biosphere is a zone of life found on earth. Since the artificial biosphere has all the elements that support and sustain human life, then there must also be soil in the artificial biosphere.
If that is the case, then we can engage in massive tree planting. Trees take in carbon dioxide and release oxygen. Hence if a large number of trees are planted all over the artificial biosphere, the trees will eventually produce large enough oxygen to support human life overtime.
31. A mixture with sand, pink sugar and water would be best separated using
Answer:
Filtration and evaporation
Explanation:
A mixture of sand, pink sugar and water can be separated by filtration and evaporation.
The pink sugar is already dissolved in the water but the sand remains undissolved in the water hence it can be filtered off. The filtrate now contains the sugar.
The sugar is obtained from the filtrate by evaporation of the solution to yield the solid pink sugar and steam which can be condensed again to give liquid water.
An object is moving across a surface, but it does not gain or lose speed.which best describes the objects force
Answer:
Constant
Explanation:
Here's the definition of the noun:
"A situation that does not change"
In this case the situation is the speed of the object.
If you'd like to go into further detail, let's move away from English and jump into Physics. The question asked for "object's force" - keyword: 'force'. What's the formula for force? F = m * a.
F = Force, m = mass, a = acceleration.
Okay well, the question said only the speed changes and doesn't mention the mass changing so if the mass changes the force won't be constant. However, if the mass doesn't change (constant), we can continue to acceleration.
The formula for acceleration is (I think) m/s^2, that's metres over time, squared. As we know from English class; the speed is constant and thus the square of that speed is also constant - therefore the acceleration is constant.
Now, putting them together, assuming the mass is constant, we know the acceleration is constant so the force has to be constant. Case closed.
*mic drops, this was a waste of time*
ito Ang naimbento ni graham bell na nagpabilis sa pakikupagtalastasan
Answer:
ФОТОГРОФИРУЙ
ИЛИ НАПИШИ
В КОМЕНТЫ
How many molecules of hydrogen gas was produced if
5.0 moles of lead was consumed?
Answer:
3.01×10²⁴ molecules of H₂
Explanation:
Reaction that can produce hydrogen gas from Pb can be this:
Pb + H₂S → PbS + H₂
1 mol of Pb can react to 1 mol of H₂S to produce 1 mol of PbS and 1 mol of H₂
Ratio is always 1:1.
In conclussion 5 moles of lead will produce 5 moles of H₂.
Let's apply the NA to count molecules
1 mol contains 6.02×10²³
Then, 5 moles must contain (5 . 6.02×10²³) = 3.01×10²⁴ molecules
1. If you have 200 g of Al2(CO3)3 , how many moles will you have? Show your work.
Answer: There are 0.854 moles of [tex]Al_{2}(CO_{3})_{3}[/tex] present in 200 g of [tex]Al_{2}(CO_{3})_{3}[/tex].
Explanation:
Given: Mass of [tex]Al_{2}(CO_{3})_{3}[/tex] = 200 g
As number of moles is the mass of substance divided by its molar mass.
Molar mass of [tex]Al_{2}(CO_{3})_{3}[/tex] is 233.99 g/mol.
Therefore, moles of [tex]Al_{2}(CO_{3})_{3}[/tex] is calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{200 g}{233.99 g/mol}\\= 0.854 mol[/tex]
Thus, we can conclude that there are 0.854 moles of [tex]Al_{2}(CO_{3})_{3}[/tex] present in 200 g of [tex]Al_{2}(CO_{3})_{3}[/tex].
who is really good with chemistry and can help me with some questions/equations?
Answer:
I can help
Explanation:
What is the pH of a solution that has a [OH^-] of 1x10^-2?
2
12
9
8
20 POINTS 1. What is the contour interval of the above topographic map? 2. What is the change in elevation from point Y to point Z?
3. Which way does the Maple Stream flow?
4. Which hill is taller?
5. Which hill has the steepest sides?
6. What is the elevation of point A?
Answer:
1 1
Explanation:
Hill
1