Answer:
The advantages of the pig's heart over the heart formed by the stem cells is that they come in many size so it is possible to have heart for every age group of people.
There are less chances of rejection as pigs also are mammals and moreover there will be no ethical issues as such because a huge number of pigs are slaughtered everyday for human consumption and if their heart can be used for some beneficial purpose it would be good cause.
The risks related to stem cell transplantation includes tumour formation, rejection of the transplanted stem cells, infection and haemorrhage which can be quite risky for the patients.
It is not that pig's heart is always acceptable but the chances are less as compared to stem cell.
What is the molar mass of sulfur trioxide?
Answer:
80.07 g/mol
Explanation:
Sulfur's g/mol = 32.07
Oxygen's g/mol = 16.00
32.07 + 16.00(3) = 80.07 g/mol
Answer:
80.07 g/mol
Explanation:
16. State one advantage and disadvantage
of rusting
Answer:
Advantage:
It forms ferrous oxide which is used as a pigment for glasses
Disadvantage:
It destroys the appearance of the metal and weakens it.
Answer:
Advantage: Rusting provides a thin durable shell to prevent the metal from getting more corroded.
Disadvantage: Rusting weakens material due to prolonged corrosive action.
Explanation:
the temperature of a sample of water increases from 20celsius to 46.6celsius as it absorbs 5650 J of heat. what is the mass of the sample?
Answer:
m = 50.74 kg
Explanation:
We have,
Initial temperature of water is 20 degrees Celsius
Final temperature of water is 46.6 degrees Celsius
Heat absorbed is 5650 J
It is required to find the mass of the sample. The heat absorbed is given by the formula ad follows :
[tex]Q=mc\Delta T[/tex]
c is specific heat of water, c = 4.186 J/g°C
So,
[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{5650}{4.186\times (46.6-20)}\\\\m=50.74\ kg[/tex]
So, the mass of the sample is 50.74 kg.
A hot spot is an area where material from deep within the mantle rises and melts through the crust above it.
Answer:
The correct answer to the following question is "TRUE".
Explanation:
Hot spots become areas within the mantle of the planet whereby unusually warmer stones melt to form magma which grows through all the surface as well as melt through as well. This seems to be a region where even the water rises through deeper inside the earth as well as warms thru the surface just above, this occurs in locations that are more or less near and nothing like the boundary of the plate.So that the given is the correct statement.
Make notes on why did the levels of carbon dioxide in the atmosphere decrease?
Answer:
Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so its amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.
Uptake by living organisms
Carbon dioxide was also absorbed from the oceans into photosynthetic algae and plants. Many of these organisms, and the simple organisms in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.
Coal is a fossil fuel which was formed from trees which were in dense forests in low-lying wetland areas. Flooding caused the wood from these forests to be buried in a way that prevented oxidation taking place. Compression and heating over millions of years turned the wood into coal.
Crude oil and natural gas were formed from simple plants and tiny animals which were living in oceans and lakes. These small organisms died and their remains sank to the bottom where they were buried under sediments. The lack of oxygen prevented oxidation from occurring.
Over millions of years, heat and pressure turned the remains of the organisms into crude oil and natural gas. Natural gas contains the smallest molecules and is often found on top of crude oil, trapped under sedimentary rock.
Hope this helps..Pls mark as Brainliest!!
Answer:
Changes in the atmosphere
The proportion of oxygen went up because of photosynthesis by plants. The proportion of carbon dioxide went down because: it was locked up in sedimentary rocks (such as limestone) and in fossil fuels. it was absorbed by plants for photosynthesis.Cutting down of trees.Because carbon dioxide traps heat in the atmosphere, a lessening of atmospheric carbon dioxide concentrations would mean that more heat could escape into space. This would result in a net decrease in the Earth's average temperature, assuming other factors remain the same.Carbon dioxide levels decreased because of processes that included: dissolving in the oceans. use by plants for photosynthesis. formation of fossil fuels as plants died and their carbon compounds became locked up underground.Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis. ... These dynamics make restoring and managing existing forests, and adding trees to ecologically appropriate lands outside of farmland, especially important.Explanation:
What is the pH of a 0.45 M solution of hydrochloric acid
pH = 0.35
Explanation: hope this helps
Answer: 0.35
Explanation:
1. Which of these show a diatomic element?
CO
H₂
He
SO₂
2. Which of these substances is an element?
Chlorine
Ice
Methane
Sodium chloride
3. When the elements lead and bromine combine together, the name of the substance formed is called .......
Lead bromate
Lead bromide
Lead bromite
Lead bromium
Answer:
1) H2
2) Chlorine
3) Lead bromide
Complete the following ionic equation: [tex]Zn + 2Ag^{+} ---\ \textgreater \ ......... + ..........[/tex]
Answer: [tex]Zn+2Ag^+\rightarrow Zn^{2+}+2Ag[/tex]
Explanation:
Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously and the number of electrons lost is equal to the number of electrons gained.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Anode : [tex]Zn\rightarrow Zn^{2+}+2e^-[/tex]
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
Cathode : [tex]2Ag^++2e^-\rightarrow 2Ag[/tex]
Thus the complete ionic equation will be :
[tex]Zn+2Ag^+\rightarrow Zn^{2+}+2Ag[/tex]
Consider the word equation.
calcium hydroxide + hydrochloric acid → calcium chloride + water
Which is the corresponding formula equation?
A: CaCl2(1)→ Ca(s) + Cl2(g)
B: O CaO(s)+ H2O(1)>Ca(OH)2(aq)
C: NaOH(aq) + 2HCl(aq) → NaCl(aq) + 2H2O(1)
D: Ca(OH)2(S) + 2HCI(I) → CaCl2(aq) + 2H20(1)
The chemical equation for the given word equation is Ca(OH)[tex]_2[/tex](S) + 2HCI(I) → CaCl[tex]_2[/tex](aq) + 2H[tex]_2[/tex]0(1). Therefore, the correct option is option D.
Chemical equations are symbols or chemical formulas that depict a chemical reaction symbolically. With a plus sign separating the entities in the reactants and products, the reactant objects are listed on the left as well as the result entities are listed on the right.
An arrow indicating the reaction's direction points in the path of the products. The chemical formulas could be mixed, symbolic, or structural. The critical values of a stoichiometric figures are shown as coefficients beside the symbols as well as formulas of the various entities. The chemical equation for the given word equation is Ca(OH)[tex]_2[/tex](S) + 2HCI(I) → CaCl[tex]_2[/tex](aq) + 2H[tex]_2[/tex]0(1).
Therefore, the correct option is option D.
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Create a model of the atoms of a substance moving through the solid liquid and gas states
Answer:
thats the answer
Explanation:
Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B
How many boxes of A would be required to make 30 grams of C?
Answer:
the answer would be 2
Explanation:
20) Study
of
reaction
heat
is caused
A. Organic Chemistry
B. Thermodynamic
C.Inorganic Chemistry.
D.Physical Chemistry
Answer:
The answer is thermodynamic because in this branch branch we study heat and Temperature and their relationship
Explanation:
I hope this will help you:)
Formation of heat and/or light when two substances are combined indicate a _______ change.
Answer:
It's a chemical change
Which reaction does not involve neutralization? A. H 2 SO 4 + 2NH 3 -------> (NH 4 ) 2 SO 4 B. H 2 SO 4 + BaCl 2 --------> BaSO 4 + 2HCl C. H 2 SO 4 + CuO -----> CuSO 4 + H 2 O D. H 2 SO 4 + 2NaOH ----> Na 2 SO 4 + 2H 2 O
Answer:
B. H2SO4 + BaCl 2 --------> BaSO4 + 2HCl
Explanation:
Neutralization reactions are characterized by their reactants of acids and bases reacting to form salt and water. All of the options except B, have formation of salt and water. Also, B is more likely a percipitation reaction (also a double displacement reaction) and not neutralization.
What causes the sea floor to move apart at a sea floor spreading center A density B continental drift C paleomagnetism D convection currents
Answer: D convection currents
Explanation:
The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.
Matter is made up of small
Answer:
atoms and molecules
Explanation:
matter is made up of particles called atoms and molecules
Matter is made up of small molecules and attoms
Plz help!!! How do I answer these??? :( I don’t get this at all!! Please help
Sorry meant to put under biology!
Answer:
1) 60°
2) 60°
3) 45°
4) E
5)90°
6) E
When seeds germinate, roots grow downward and stems grow upward in response to gravity. This response to gravity is called _______.
Answer:
geotropism/gravitropism
Explanation:
Select the correct choice there's only one answer.
Answer:
Option C is the correct option.The Valence electrons in S
Explanation:
Sulphur has highest effective nuclear charge as in a period there is increase in effective nuclear charge from left to right.Sulphur is in the end in a period leaving Mg and Al in left side.
Hope this helps....
Good luck on your assignment...
If 0.360 J of heat is added to 0.7402 g of water, how much will the temperature increase?
Answer:
You are not supposed t9 be cheating
Explanation:
Answer:
ΔT = 0.116 °C
Explanation:
Using Formula
Q = mc ΔT
Where Q = 0.360, c = 4.184 and m = 0.7402
ΔT = Q/mc
ΔT = 0.360/ (4.184)(0.7402)
ΔT = 0.360 / 3.097
ΔT = 0.116 °C
So, The change in Temperature/Increase in Temperature is 0.116 °C
Pls help asap!!! I don’t understand how to do it
Answer:
split the reaction in to respective ions to ge the ionic equation of this reaction
Explanation:
2 Al + 2Fe+3 O3^-2 ---> 2Al+3 O3^-2 + 2Fe
ins simple it would be
Al + Fe+3 ----> Al+3 + Fe
what is genetic tagging
Answer:
Genetic tagging, or the identification and tracking of individual animals using DNA, is a non-invasive method of conducting research that uses samples from shed hair, feathers, feces, or saliva. ... Genetic tagging approaches are complementary to traditional approaches and add a powerful tool to the ecologists' toolkit."
Explanation:
Which is true about reaction rates?
1. High reaction rates occur only in spontaneous reactions.
2. Low reaction rates occur only in nonspontaneous reactions.
3. Reaction rates are not dependent on high or low activation energies.
4. Reaction rates are not related to spontaneity.
ANSWER 4
Answer:
the correct choice would be: 4. Reaction rates are not related to spontaneity.
Explanation:
The speed of reaction is independent of spontaneity, since it depends on other factors such as the amount of reagent.
The amount of reagent is one of the variables that most influences the speed of reaction, the greater the amount of reagent, the faster the reaction will be and thus the speed will be increased.
What happens as you increase the temperature of a reaction?
OA
More collisions occur and the time required for the reaction increases.
Fewer collisions occur and the time required for the reaction decreases.
B.
C.
Fewer collisions occur and the time required for the reaction increases.
OD.
More collisions occur and the time required for the reaction decreases.
Answer:
A
Explanation:
the kinetic energy of the particles leading to more collisions hence increased reaction rate
Answer:
The answer is d.
More collisions occur and the time required for the reaction decreases.
Hope this helps.
Predict the arrangement of the following substances in decreasing order of pH value Orange juice || Bitter gourd juice || Hydrochloric acid || Mineral water
Answer:
Mineral water> Bitter gourd juice> Orange juice> Hydrochloric acid
Explanation:
pH is referred to as the degree of acidity or alkalinity of a substance. The pH scale is arranged from 0-14. Substance with a pH of 0-6.9 are acid, a pH of 7 indicates neutrality while a pH of 8-14 indicates alkalinity.
Mineral water is usually slightly acidic with a pH between 5-6. The pH of bitter gourd juice is between 4.24-4.45. The pH of orange juice ranges between 3.3 to 4.2 lastly, the pH of hydrochloric acid is about 3.01.
The pH values itemized above informed the arrangement of decreasing pH values shown in the answer box.
project: Modeling Energy Changes
create a model to show how energy changes in a chemical reaction
Answer:
A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.
A model can be created by following below details:
Take a beaker and put 10 milliliters of vinegar in it.Place a thermometer in the beaker and measure the initial temperature.Then add half teaspoon of baking soda, that results into decreasing in the temperature.So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.
Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.
According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.
The project model for energy change can be:
The general model for an endothermic reaction:Reactant + Energy = Products.
The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.
The general model for the exothermic reaction:Reactant = Product + Energy
The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.
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what is involved in redox reactions
A.the transfer of electrons between reactants
B.the bonding of ions to form chemical compounds
C.the addition of water to break down food macromolecules
D.the breaking down of water into hydrogen and oxygen atoms
Answer:
B
Explanation:
Redox reactions are comprised of two parts, a reduced half and an oxidized half, that always occur together. The reduced half gains electrons and the oxidation number decreases, while the oxidized half loses electrons and the oxidation number increases.
Mendeleev's periodic table of elements was created in 1901.
O A. True
O B. False
Explanation:APΕX
Which condition must be met in order for an equation to be balanced? The elements in the reactants are the same as the elements in the products. There are fewer elements in the reactants than there are in the products. The number of atoms in the reactants is greater than the number of atoms in the products. The number of atoms in the reactants equals the number of atoms in the products. PLEASE HELP 17 POINTS
Answer:
The number of atoms in the reactants equals the number of atoms in the products.
The correct answer as to which condition must be met in order for an equation to be balanced would be that the number of atoms in the reactants equals the number of atoms in the products.
In a reaction, the law of conservation of matter, mass. or atom must always hold true. For an equation of a reaction to be balanced, the number of atoms of each element in the reactants must equal to the number of atoms of the elements in the products respectively, even though their states might have changed.
For example in the reaction below:
NaOH + HCl ---> NaCl + H2O
The number of atoms of Na, O, H, and Cl on the reactant side is the same as the product side of the equation. The equation is, thus, said to be balanced.
More on balanced equation can be found here: https://brainly.com/question/7181548
Wildflowers bloom earlier than large trees. This helps wildflowers compete for _____. water, light, food, or air
Answer: Light
Explanation:
The environment abiotic factors like sunlight, water, air, and soil are important for the growth of the plants. A wildflowers is a plant that grows in wild. It was not intentionally seeded or planted.
The light is one of the important environmental factor. As the wildflowers are blooming earlier than the large trees. Thus the wildflowers are receiving the light earlier than large trees.