Answer:
Wax
Explanation:
The combustible material in a candle or its fuel is wax. Before the wax can become fuel, it first needs to get hot enough. To start that heating process, you first need to light the wick with another source of fire, such as a match. As the wick burns down the heat of the flame melts the wax around the wick.
what are advantage of using alternatives to fossil fuels?
Answer:
Fossil fuels release greenhouse gases and are non renewable
15. Identify What types of bonds are present in an alkyne?
Answer:
Alkyne are hydrocarbons which contain carbon-carbon triple bonds.
This atom can form up to _____ single covalent bond(s). An atom with two electron shells. There is one electron pair in the inner electron shell and four unpaired electrons in the outer electron shell. 0 1 4 2 3
Answer:
4
Explanation: it's a carbon atom right....soo it'll form 4 bonds(single)
An atom can form 4 single covalent bonds is carbon with two electron shell.
What are covalent bonds?The bonds are defined as a strong bond that binds atoms, ions, or molecules together and promotes the production of molecules.
There are three types of bonds.
Ionic bondCovalent bondMetallic bondCovalent bonds are defined as the bond formed by sharing of electrons with each other.
Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons. Bonding pairs or sharing pairs are other names for these electron pairs.
It can also be defined as a type of chemical link where atoms share electrons to create electron pairs.
Covalent bonds has low melting point, boiling point, enthalpy of fusion and enthalpy of vaporization.
Thus, an atom can form 4 single covalent bonds is carbon with two electron shell.
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ICE
OC
TINITIAL
37°C
MWATER
231g
Heat will flow from the warm water into the 0° C ice.
Energy will flow until all of the ice has become water
and has the same temperature as the original warm
water, Tfinal. The amount of energy the warm water lost
(which is equal to the amount of energy the ice gained
in order to melt) can be calculated by the equation we
learned last week.
MICE +
MWATER
2.65 4
-22.5°C
TFINAL
AELost = MWATER * SH WATER (TINITIAL -TFINAL)
Х
Once you make this calculation you will have the
amount of energy that is needed to melt your total
mass of ice, so just divide it by the mass of ice you
melted and you will have the heat of fusion of ice
(Hfus for H,O) in Joules per gram of ice. Remember to
repeat the experiment at least one more time using a
different amount of water, a different amount of ice, and
.
Answer:
Suppose that several objects composed of different materials are heated in the same manner. Will the objects warm up at equal rates? The answer: most likely not. Different materials would warm up at different rates because each material has its own specific heat capacity. The specific heat capacity refers to the amount of heat required to cause a unit of mass (say a gram or a kilogram) to change its temperature by 1°C. Specific heat capacities of various materials are often listed in textbooks. Standard metric units are Joules/kilogram/Kelvin (J/kg/K). More commonly used units are J/g/°C. Use the widget below to view specific heat capacities of various materials. Simply type in the name of a substance (aluminum, iron, copper, water, methanol, wood, etc.) and click on the Submit button; results will be displayed in a separate window.
Explanation:
Ethanol, an organic compound, has the following structural formula.
H
H
H-C-C-0-H
I
1
H H
What is the chemical formula for ethanol?
O CHO
O
C₂H5O
C₂H5O2
O C₂H6O
Answer:
hope this will help you
Explanation:
[tex]the \: structural \: formula \: is \: ch3 - ch2 - oh \\ \\ and \: chemical \: formula \: is \: c2h6o[/tex]
The chemical formula for ethanol is [tex]C_2H_5OH[/tex], where there are 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom are there.
What is the chemical formula?A chemical formula tells us the number of atoms of each element in a compound.
The methyl group ([tex]CH_3-[/tex]) carbon attaches to the methylene group ([tex]CH_2-[/tex]) carbon, which binds to the oxygen of the hydroxyl group (-OH).
Hence, the chemical formula for ethanol is [tex]C_2H_5OH[/tex], where there are 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom are there.
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if it has a high temp but a low pressure does it dissolve faster than a high pressure and a low temperature
Answer:
it dissolve faster in higher temperature hope it's right
Solar energy, geothermal energy, water and wind energy are 1.__________________ resources. coal, oil, natural gas are examples of 2.__________________resources. 3._______________or heat from the ground is less polluting than crude oil. but when they are taken from deep under the ground, areas that have high biodiversity are destroyed. hydropower (hydro meaning water) is energy that comes from the force moving 4._______________. flowing water creates energy that can be captured and turned into 5. ______________. the most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. natural gas is a form of 6. _____________, so are coal and crude oil (sometimes called petroleum). in the philippines, we have coal and natural gas deposits. 7. ______________is a black or brownish black, solid rock that can be burned. 8. ____________ is a clean energy source that we can rely on for a long-term future. a wind turbine creates reliable, cost- effective, pollution-free energy. it is affordable, clean, and sustainable. 9._____________ is the practice of caring for these resources so all living things can benefit from them now and in the future. to use natural resources 10_________________, we need to rethink which resources we use and how we use them. we
Answer:
1.Renewable resources.
2.Non- Renewable
3. Geothermal Energy.
4. Kenetic
5.Hydroelectric energy
6. Fossil fuels.
7.Coal
8.Wind power? (im trying to work with what you gave me)
9.Conservation
10. in the future? (these are ones that you have to think about)
Explanation:
you didnt give a key so at least give me credit for working with what i got.
Solar energy, geothermal energy, water and wind energy are renewable resources, Non- renewable, geothermal energy, kinetic, hydroelectric energy, fossil fuel, coal, wind power, conservation.
What is renewable resources?Renewable resources are energy sources that are never depleted and can provide a steady supply of clean energy.
What is energy?The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.
1) Renewable resources resources. coal, oil, natural gas are examples of
2) Non- renewable sources.
3) Geothermal energy or heat from the ground is less polluting than crude oil. but when they are taken from deep under the ground, areas that have high biodiversity are destroyed. hydropower (hydro meaning water) is energy that comes from the force moving.
4) Kinetic lowing water creates energy that can be captured and turned into
5) hydroelectric energy the most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. natural gas is a form of
6) fossil fuel so are coal and crude oil (sometimes called petroleum). in the Philippines, we have coal and natural gas deposits a black or brownish black, solid rock that can be burned.
8.) Wind power is a clean source that we can rely on for a long-term future. a wind turbine creates reliable, cost- effective, pollution-free energy. it is affordable, clean, and sustainable.
9) .Conservation is the practice of caring for these resources so all living things can benefit from them now and in the future. to use natural resources
10) In the future, we need to rethink which resources we use and how we use them.
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what is 750 grams of phosphorus
The moles of phosphorous which are present in 750 grams of phosphorous is 24.27 moles.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, whereW = given massM = molar massMoles of phosphorous which are present in 750 grams will be calculated as:
n = 750g / 30.9g/mol = 24.27 moles
Hence the resultant moles of phosphorous is 24.27 moles.
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A solar flare may cause charged particles to enter the earth's atmosphere.
true false
Answer:
True
Explanation:
This is because the Earths ionisphere was distrubed which makes radio communications.
find the iupac name for this question
Answer:
3 - Methylpent-2-yn-1-ol
Many factors would bring advantages when using fuel cells in cars, but which factor presents a drawback? fuel consumption hydrogen storage greenhouse gas emissions reliance on petroleum products
One potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.
What are fuels cells?Fuel cells are cells which use hydrogen and oxygen as fuel to produce electrical energy for use in various purposes such as in powering cars.
The energy produced is as a result of redox reactions.
Fuels cells are clean renewable energy sources.
A potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.
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Does sodium fluoride follow the octet rule? If not, which exception is it?
Answer:
Sodium fluoride (NaF) does indeed follow the octet rule without any violations.
Which of the following is an oxidation half reaction
Answer:
Sn²⁺ → Sn⁴⁺ + 2e⁻
Explanation:
Answer:
The answer is..
Sn²⁺ → Sn⁴⁺ + 2e⁻
I hoped this helped, please let me know if it isn't the right answer btw. :)
Have a wonderful day!
what is the percent yield
the percent yield: 9/21 x 100% = 42.9%
when chlorine is added to acetylene tetrachloroethane is formed How many grams of tetrachloroethane are ade if 15 liters of chlorine is used with excess C2H2
35.5 g of tetrachloroethane is added if 15 grams of chlorine is used with excess [tex]C_2H_2[/tex].
What is a balanced chemical equation?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
Balanced chemical equation:
[tex]2Cl_2 (g) + C_2H_2 (g)[/tex] → [tex]C_2H_2Cl_4(l)[/tex]
In your case, 2 moles of chlorine gas are needed to produce 1 mole of tetrachloroethane, which implies that there's a 2:1 mole ratio between the two.
Calculating the mass of tetrachloroethane.
[tex]m[/tex][tex]C_2H_2Cl_4(l)[/tex] = [tex]15 g[/tex] [tex]Cl_2 (g)[/tex] X [tex]\frac{2 mol \;of \;Cl_2}{70 g \;Cl_2}[/tex] X [tex]\frac{1 mol \;of \;C_2H_2Cl_4(l)}{2 mol \;Cl_2}[/tex] X [tex]\frac{167.8 g \;C_2H_2Cl_4(l))}{1 mol \;C_2H_2Cl_4}[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]17.75 g[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]35.5 g[/tex]
Hence, 35.5 g of tetrachloroethane is added if 15 gram of chlorine is used with excess [tex]C_2H_2[/tex]
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How do pure substances and mixtures compare?
Answer:
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
Explanation:
Why do medical implants and prosthetics should be carefully designed when placed inside or on the surface of the body?
Answer:
because it needs to fit exactly into how your body is like
Explanation:
If 321.5 grams of phosphorus chloride are made, how many grams of phosphorus were consumed?
If 321.5 grams of phosphorus chloride are made, then 168.235 grams of phosphorus were consumed.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, whereW = given massM = molar massMoles of phosphorous chloride = 321.5g / 74.55g/mol = 4.315 mole
Given chemical reaction is:
2K + Cl₂ → 2KCl
From the stoichiometry of the reaction:
2 moles of KCl = produced by 2 moles of K
4.315 moles of KCl = produced by 4.315 moles of K
Mass of potassium = (4.315mol)(39g/mol) = 168.235 g
Hence required mass of phosphorous is 168.235 g.
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the fastest train on earth, the TGV in france, can travel 800 miles in 2.5. what is the speed?
Answer:
s= 3.20 mph
Explanation:
s=t/d
s=380miles/5hours
requires temperatures of millions of degrees K
If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 28 days?
Round to the nearest whole number.
Answer:
2500g
Explanation:
Half-life like the name suggests cuts the amount by half. So 10,000 grams would be 5,000 grams in one half-life (14 days). But 28 days is two halflives (14 + 14 = 28), thus 5,000 would be cut in half again to finally be 2500 g.
ANSWER THIS QUESTION PLEASE!
In a laboratory experiment, you perform the above reaction. However, you only get 7.50g of Al. What was the percent yield of that experiment?
Answer:
Explanation:
n a laboratory experiment, you perform the above reaction. However, you only get 7.50g of Al. What was the percent yield of that experiment?
Which change does thermal energy cause? *
O greater energy differences between molecules
O slower molecule movement
O reduced energy transfer
more collisions between molecules
2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O
In the above equation, how many grams of N2 can be made when 12.2 moles of CuO are consumed?
Answer:
114 grams N₂
Explanation:
To find the answer, you need to (1) convert from moles CuO to moles N₂ (via the mole-to-mole ratio from equation) and then (2) convert from moles to grams (via molar mass from the periodic table). The final answer should have 3 sig figs according to the given value (12.2).
2 NH₃ + 3 CuO --> 3 Cu + 1 N₂ + 3 H₂O
Molar Mass (N₂): 2(14.01 g/mol)
Molar Mass (N₂): 28.02 g/mol
12.2 moles CuO 1 mole N₂ 28.02 grams
----------------------- x ----------------------- x ----------------------- = 114 grams N₂
3 moles CuO 1 mole N₂
The speed limit on a certain highway is 72 km/h. what is the speed in cm/s?
Answer:
7.2e+6 cm (7200000cm)
Explanation:
Hope this is the answer your looking for ;)
7. Review Why do carbon atoms form four covalent bonds?
Answer:
four single covalent bonds
Explanation:
cuz a carbon atom initially has four unpaired electrons in its outermost shell....sharing adds four more....making four bonds
Select the correct answer from the drop-down menu. of all the sunny club members in a particular city, 25% prefer swimming on weekends and 75% prefer swimming on weekdays. it is found that 10% of the members in that city prefer swimming on weekends and are female, while 55% of the members in that city prefer swimming on weekdays and are female. the probability that a club member picked randomly is female, given that the person prefers swimming on weekends, is .
Based on the percentage of people that prefer to swim on weekends, the probability that a female who prefers swimming on weekends is picked is 0.40.
What is the probability of a female weekend swimmer being randomly picked?This can be found by the formula:
= Percentage of females who prefer swimming on weekends / Percentage of those who swim on weekends
Solving gives:
= 10% / 25%
= 0.40 or 40%
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3 Apply Many scientific words, such as energy, also have everyday meanings. Use context clues to write your own definition for each meaning of the word energy.
Example Sentence
I am tired today and don't have much energy.
Energy:
____________
Example Sentence
Make sure to turn off the lights when you're done to save energy.
Answer:
Explanation:
3 Apply Many scientific words, such as energy, also have everyday meanings. Use context clues to write your own definition for each meaning of the word energy.
27. Write balanced equations that describe the following reactions.
a. the dissociation of perchloric acid in water
b. the dissociation of propanoic acid (CH3CH2CO2H) in
water
c. the dissociation of ammonium ion in water
#a
HClO_4(aq)+H2O(l)—»H3O+(aq)+ClO_4#b
CH3CH2COOH + H2O ==> CH3COO^- +H3O#c
This is reversible reaction
H2O + NH_3 ⇄ OH^- + NH4^+