Answer:
Answer below
Explanation:
Physical changes dont change the chemical makeup of an object. An example would be to tear a piece of paper. Tearing the paper doesnt change how the paper was made chemically
Chemical changes on the other hand do change the chemical makeup of an object. An example of a chemical change would be to bake a cake. The reason being that the chemical makeup of the cake batter is changed so that the actual cake is formed.
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?
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:
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.
1. How is a bicycle race like a chemical reaction? The Tour de France is one of the most famous bicycle races in the world. It is held from mid-July to early August every year. During the race, cyclists travel almost 4000 kilometers. At one stage of the race, riders must cross steep mountains with heights of 1900 meters or more. The riders need extra energy to ride through these steep mountains.
During the riding of the steep mountain, the body needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
What is the effect of cycling?Cycling is a good exercise as swimming, while cycling, happy hormones are released like dopamine and serotonin.
The primary forces that work while cycling are gravity, friction, rolling resistance, and air resistance.
Thus, During the riding of the steep mountain, the bod needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
Learn more about effect of cycling
https://brainly.com/question/26055886
#SPJ1
35.0g of zinc oxide react with what volume of oxygen at stp given the following reaction: zn + o2 --> zno
The volume of oxygen that would react at STP will be 6.00 L
Stoichiometric calculationFrom the equation of the reaction:
[tex]2Zn + O_2 --- > 2ZnO[/tex]
The mole ratio of [tex]O_2[/tex] to the ZnO produced is 1:2
Mole of 35 g Zn = 35/65.3 = 0.536 moles
Equivalent mole of [tex]O_2[/tex] that will react = 0.536/2 = 0.268 moles
1 mole of gas at STP = 22.4 L
0.268 moles of gas = 0.268 x 22.4 = 6.00 L
More on stoichiometric calculations can be found here: https://brainly.com/question/27287858
#SPJ1
How do models help scientists predict the polarity of molecules? Explain your answer using what you know about molecular structure and provide an example of a molecule that contains polar bonds, but is nonpolar.
Answer:
Explanation:
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
You can use the difference in electronegativity of two atoms to predict whether they make polar, nonpolar or ionic bonds. Water is a well-known example of a polar molecule.
The information with respect to the atom is as follows:
The bond that lies between the same atoms i.e. same elements should always be neutral.The bond that lies between the atoms of the different elements should always be inequivalent electrically as one atom should be positively charged and the other one should be negatively charged.How do you determine the polarity of a solution?Simply mix the liquid with an equal part of water and allow the mixture to sit undisturbed. Examine the mixture after the liquids have sat together for a time. If they have not separated, but have formed a solution, the unknown liquid is polar. If there is a clear boundary between the two liquids, it is non-polar.
Learn more about polarity of molecules here:https://brainly.com/question/15106377
#SPJ2
On Earth, carbon is essential to life. Where did Earth get its carbon?
Answer: Most of Earth's carbon was inherited directly from the interstellar medium, it is the material that exists in space between stars in a galaxy.
Explanation: All of the carbon and oxygen in all living things are made in the nuclear fusion reactors that we call stars. The early stars are massive and short-lived. They consume hydrogen, helium, and lithium and produce heavier elements.
Hope this helps!
True or false? Ionic compounds are usually a combination of a metal and a non-metal.
Answer:
here down below is the anwser
Explanation:
Whereas ionic compounds are usually formed when a metal and a nonmetal combine, covalent compounds are usually formed by a combination of nonmetals. Thus, the periodic table can help us recognize many of the compounds that are covalent.
If 6.3 moles of O2 and 8.15 moles of N2 are placed in a 65.1 L tank at a
temperature of 348 C, what will the pressure of O2?
Answer:
Partial pressure of O2 = 4.93 atm
Explanation:
PV = n RT R = .082057 L-atm/mol-K
n = 6.3 + 8.15 = 14.45 moles
348 C = 621.15 K
P (65.1) = 14.45 ( .082057)(621.15) = 11.31 atm
Now the fraction of pressure from Oxygen is
6.3 / (6.3+8.15) * 11.31 = 4.93 atm
what is the important of Noble gases
Answer:
most often helium and argon, the least expensive—are used to provide chemically unreactive environments for such operations as cutting, welding, and refining of metals such as aluminum (atmospheric oxygen and, in some cases, nitrogen or carbon dioxide would react with the hot metal).
hope this helps
Natalia's group comes up with three different solutions:
.
Scoop the oil up with a spoon.
.
Absorb the oil with a paper towel.
• Use soap to break up the oil.
Evaluate each solution for its potential to remove the oil. For each solution, consider the following:
What is the scientific reasoning that supports this solution?
.
• How effective do you think this solution will be?
.
If scientists implemented this solution to clean up a large oil spill in the ocean, what possible effects
would it have on the ecosystem?
The best approach would be to use soap to break up the oil since the soap is biodegradable and has no effect on the environment.
What is a clean up effort?A clean up effort is a deliberate effort to recover the environment after an environmental hazard has occurred such as an oil spill.
In carrying out a clean up exercise, we seek for the most environmentally friendly approach.
In this case, the best approach would be to use soap to break up the oil since the soap is biodegradable and has no effect on the environment.
Learn more about environmental clean up:https://brainly.com/question/2566370
#SPJ1
What are some reasonable safety precautions for conducting field investigations
in polar climates?
Answer:
warm clothing hiking sticks safter gear. food water. the basics
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.
To know more about energy click here.
https://brainly.com/question/1932868.
#SPJ2
Solve and balance H2+Cl2
H2 + Cl2 → 2 HCl - Equation Balanced
Explanation:
Two elements H2and Cl2 combine to from a single compound, HCl. Hence, it is a combination reaction As two elements combine to from a compound, it is an element - element combination.
I hope it'll help you...
How do I learn a subject easier
Say out loud what you want to remember.
Take notes by hand, not on a computer.
Chunk your study sessions.
Test yourself. A lot.
Change the way you practice.
Exercise regularly.
Get more sleep.
Learn several subjects in succession.
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.
ANSWER THIS QUESTION PLEASE!
what is an atom?Please help
Answer:
It's the basic unit of an element.
something that makes up everything that has mass
Explanation:
gases are a unique state of matter because the volume of a gas can be compressed or expanded based on the pressure applied. robert boyle studied the changes in the volume of a gas as the pressure changes with a barometer. he found that the pressure is inversely proportional to volume when the mass and temperature remain constant. which equation represents the pressure-volume relationship of boyle's law?
Boyle's law gave the relation between the pressure and the volume of the gas. The equation can be represented as PV = constant (T and n are constant).
What is Boyle's law?Boyle's law gave the inverse relationship between the pressure and the volume of the hypothetical ideal gas when the moles and the temperature are constant. It can be shown as PV = constant.
The volume of the gas can be compressed by increasing the pressure, and the volume of the gas can be expanded by decreasing the pressure of the gas.
Therefore, Boyle's law gave the PV = constant.
Learn more about Boyle's law here:
https://brainly.com/question/13362447
#SPJ1
What is the total number of moles of solute in 2.0 liters of 3.0 m naoh
a) 1.0 mole
b) 2.0 moles
c) 3.0 moles
d) 6.0 moles
Answer:
d) 6.0 moles
Explanation:
M = moles of solute/liters of solution
3 0M = x/2.0
2.0L×3 0M = x/2.0L×2.0L
6.0 moles = x
Which one of the following molecules can form hydrogen bonding?
Answer:
it is a
Explanation:
i hope this helps you
If a substance cannot be separated by physical means or chemical means, it is ___________.
Question 4 options:
an element
a solution
a molecule
a compound
An element is a pure substance that cannot be separated into simpler substances by chemical or physical means
Answer:
It is an element.
Explanation:
chemical element, also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.
HOPE IT HELPS.
PLEASE MARK ME AS BRAINLIEST.
The electrons between atoms in metallic bonds
allow for bonding metals to be reactive.
allow for bonding metals to be stable.
are stationary and provide durability to the metal.
are attracted to the neutrons of the metal.
Answer:
Metallic bonding is the type of chemical bonding that occurs between atoms of metals. In a metallic bond, atoms share their electrons in a way that allows them to form a “sea” of free electrons. This electron sea is responsible for the unique physical and electrical properties of metals.
Explanation:
Answer:
B. allow for bonding metals to be stable.
Explanation:
edge 2022
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.
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:
Water has a specific heat of 4.184 J/goC. Copper metal has a specific heat of 0.385 J/goC. What can be said about the amount of heat needed to raise both substances 1 degree Celsius. (In other words, which one will take more heat to raise 1 degree.)
It can be said that water will take more heat to raise its temperature by 1°C than copper. Details about specific heat can be found below.
What is specific heat capacity?Specific heat capacity of a substance can be defined as the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K or 1 °C.
According to this question, water has a specific heat of 4.184 J/g°C while Copper metal has a specific heat of 0.385 J/g°C. This shows that water has a higher specific heat.
Therefore, it can be said that water will take more heat to raise its temperature by 1°C than copper metal.
Learn more about specific heat capacity at: https://brainly.com/question/1747943
#SPJ1
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.
To learn more about covalent bonds, refer to the link below:
https://brainly.com/question/10777799
#SPJ12
What kind of intermolecular forces act between a chloromethane molecule and a chloroacetylene molecule
Dipole to Dipole force
Explanation:
A dipole to dipole forces exists between these molecules
Acids increase the concentration of what in water?.
Answer:
Hydronium (H3O+) ions
Explanation:
Acids increase the concentration of hydronium ions in water and thus lower the pH (make it more acidic)
Answer:
The answer for this question is Hydrogen Ions
Put the following events in the order for a digital recording to become sound waves through a speaker. put the first event at the top of your list.
The events in the order of top to bottom for a digital recording to become sound waves through a speaker include:
Sound is encoded on a digital recording as an electrical signal.The digital recording plays the sound as an electrical signal.The electric signal moves through a voice coil.The voice coil produces a magnetic field.Changing the magnetic field pushes and pulls on the diaphragm.What is Sound wave?This is defined as a pattern of disturbance caused by movement of energy along a medium.
The order of events which produces the sound heard by audience can be seen above.
Read more about Sound wave here https://brainly.com/question/1199084
#SPJ1
