Answer:
viruses can kill you vaccines can save your life.
Explanation:
Answer:
The effect of leaky vaccines on how disease spreads is explained by the “imperfect-vaccine hypothesis”. It holds that, without vaccination, a very virulent virus can get into a population and kill infected hosts (people or animals) very quickly – before they have a chance to spread it. This means that the virus will die out very quickly too, as all potential hosts will be dead or immune to it.
Explanation:
Which statement is true about nuclear fusion?
A: It is caused by the same process that causes nuclear fission.
B: It does not occur naturally in the solar system.
C: It has very low activation energy.
D: It produces nearly all the elements that are heavier than helium.
Answer:
its d
hope it helpss :)))
Answer: D
Explanation:
Wher do most living thing get the energy they need for life
Answer:
Earth
Explanation:
If you have 3 moles of O2, how many O2 molecules do you have?
Answer:
You have 3 moles, so there are 18481.518 oxygen molecules
Explanation:
There are 18.066×10²³ molecules of oxygen present in 3 moles of oxygen.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.
Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Learn more about moles,here:
https://brainly.com/question/26416088
#SPJ2
can anyone answer this question pleaseeeee
Answer:
A.
Explanation:
I'm pretty sure that its right because I know bases aren't soluble and I've never heard anything about all of them being neutralizing to acids.
Hope this helps!
A substance has a mass of 100 g and a volume of 10 mL. What is the
density of the substance? *
0 0.05 g/mL
0 2.0 g/mL
0 10 g/mL
0 20 g/mL
Answer:
10 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]denstity = \frac{100}{10} \\ [/tex]
We have the final answer as
10 g/mLHope this helps you
Answer:
thanks
Explanation:
If 6.49 mol of ethane (C2H6) undergo combustion according to the unbalanced equation
C2H6 + O2 −→ CO2 + H2O ,
how many moles of O2 is required?
1. 27.79
2. 7.63
3. 8.4
4. 25.48
5. 12.635
6. 21.035
7. 23.8
8. 19.04
9. 22.715
10. 26.775
Answer in units of mol.
Answer:
22.715 moles of oxygen are used
Explanation:
Given data:
Number of moles of ethane = 6.49 mol
Number of moles of O₂ required = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Now we will compare the moles of oxygen with ethane.
C₂H₆ : O₂
2 : 7
6.49 : 7/2×6.49 = 22.715 mol
Thus, 22.715 moles of oxygen are used.
which two sentences taken together provide the best evidence to support the ideas that both physical and chemical change can significantly change the appearance of a substance ?
A. in a physical change the material involved is structurally the same before and after the change
B. a piece of metal may be heated in a fire until it glows but the metal is the same material before Heating and after Cooling
C. chemical changes require the breaking and forming of chemical bonds during a chemical reaction
D. the creation of a new ,solid substance from to liquid substance into the kids that a reaction has taken place that has alerted the original substance
Answer:
A ithink
Explanation:
The chemical changes require the breaking and forming of chemical bonds during a chemical reaction. The correct option is C.
What is chemical bond?Chemical Bonding refers to the formation of a chemical bond between two or more atoms, molecules, or ions to give rise to a chemical compound.
These chemical bonds are what hold the atoms in the resulting compound together.
A chemical bond is a bond formed when the atoms in a compound's molecule combine and are held together by a strong combining force.
Chemical bonds are classified into two types namely ionic bonds and covalent bonds.
Chemical bonding enables scientists to combine the elements of the periodic table in a variety of ways to create chemical compounds and materials.
Thus, the correct option is C.
For more details regarding chemical change, visit:
https://brainly.com/question/23693316
#SPJ2
how acetophenone can be converted to phenol by reaction?
a) m-CPBA followed by base catalysed hydrolysis
b) conc. HNO3
c) iodine and NaOH
d) Singlet oxygen followed by base catalysed hydrolysis product
Answer:
m-CPBA followed by base catalysed hydrolysis
Explanation:
The scheme of this reaction is shown in the image attached.
We can see here that the acetophenone reacts with metachloroperoxybenzoic acid (m-CPBA) as shown in the image to yield phenyl acetate.
Phenyl acetate is now hydrolysed by a base as shown to yield the acetate ion and phenol.
PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
1. Sara wants to see if a new brand of hair dye lasts longer than the brand she
currently uses. She puts the new hair dye on the left side of her head and the old
brand on her right side. After 2 weeks she observes which side of her head has
more gray hair showing through.
1. Sara wants to see if a new brand of hair dye lasts longer than the brand she
currently uses. She puts the new hair dye on the left side of her head and the old
brand on her right side. After 2 weeks she observes which side of her head has
more gray hair showing through.
Compute the following and give your answer in scientific notation:
(3.51 x 10-²) - 2.94 × 10-²
=
× 10^
Which coefficients will balance the following reaction:
Answer:
C option
Explanation:
please Mark me brainliest
true or false: u find soil rich in humus in horizon c
Answer:
True
Explanation:
What is an alkaline earth metal that has 5 shells?
Answer:
The elements in the alkaline earth metals group; beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra), have two electrons in their outer electronic shell.
Explanation:
The alkaline earth metals consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
The alkali earth metal has been the element of group 2. The elements have consisted of the 2 valence electrons.
The electrons in the elements have been assigned the electron address based on the capacity of the shells to occupy electrons.
The electrons have been filled based on the energy level of the shells.
The order of the increasing energy level has been:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s.
The elements with the occupied 4p shells will have the 5 shells.
The elements in group 2 consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
For more information about alkaline earth metal, refer to the link:
https://brainly.com/question/11857448
The movement of the tectonic plates on the earth is caused by
Answer:
The movement of tectonic plates is caused by convection currents in the molten rock in Earth's mantle below the crust layer. Earthquakes and volcanoes are great examples of the tectonic movement's results.
Explanation:
whoever answers this first gets brainly
Answer:
A option
Explanation:
water gets split in photosynthesis
Energy from the Sun reaches Earth mainly by the process of *
1 point
conduction
convection
reflection
radiation
Answer:
D. Radiation
Explanation:
The Sun always transfers its energy to any planet (Including Earth) through solar radiation, infrared, and UV rays. These are all examples of radiation.
I hope this helps you! Good luck with your test/assignment! :D
♦Will mark brainliest♦
Answer all Questions And will mark brainliest if not will not mark
When swinging on a park swing when is your kinetic energy the least?
Question 1 options:
Kinetic energy is least at the lowest point of your swing when you are closest to the ground.
Kinetic energy is the least when you are halfway between the highest point of the swing and the bottom.
Kinetic energy is least at the at the top of the swing when you are still for a moment just before falling again.
Kinetic energy is least as you are moving past the bottom of the swing and going back up to the highest point.
Question 2 (3 points)
In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as a skateboarder rides a halfpipe or a pendulum moves, why did the bar for the total energy remain constant?
Question 2 options:
all answers given are correct
Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model.
Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved.
This is because no energy is being created or destroyed in this system
Question 3 (3 points)
Studying energy involves determining the amount of energy an object has. This energy can be kinetic or potential, or it could be a combination of both. Consider a 2-kg bowling ball sits on top of a building that is 40 meters tall. It falls toward the ground. Think about the amount of kinetic energy the bowling ball has as it falls, select when the ball would have the most kinetic energy from the choices given.
Question 3 options:
after it hits the ground and is no longer moving.
as it sits on top of a building that is 40 meters tall.
as it is halfway through the fall and it has reached a speed of 19.8 meters per second.
just before it is to hit the ground and it has reached a speed of 28 meters per second.
Question 4 (3 points)
How can you increase the gravitational potential energy (GPE) of an empty shoe box on the middle shelf of a bookcase?
Question 4 options:
raise the box to a higher shelf
add items to the box and raise it to a higher shelf
all of the options listed here will increase the GPE
add items to the box to increase its mass on the self it is on
Question 5 (3 points)
Which is an example of an object increasing its kinetic energy
Question 5 options:
an airplane after parking at the gate on the airport runway
a rocket resting in the docking claps just before the launch sequence it to begin
a jogger running faster after spotting a mountain lion following him on the trial
a train that is no longer moving and has come to a complete stop at the station platform so people can board
Question 6 (3 points)
Changing which factor would NOT influence the total kinetic energy of a moving shopping cart?
Question 6 options:
Decreasing the mass or the speed of the cart
increasing the rate of speed you push it down the aisle
increasing the mass of the cart by adding items while moving
Turning a different direction at the end of the aisle while continuing to move at the same speed.
Question 7 (3 points)
Mechanical energy is defined as
Question 7 options:
potential energy
Energy of machines and tools
the energy of motion and position, which is represented by the formula KE + PE = ME
Energy of motion
Question 8 (3 points)
Two children are waiting to go down a slide. The first child goes down and then stays sitting at the bottom of the slide. If there is no friction involved and all of the mechanical energy is conserved what would happen to the energy of the second child from the top to the bottom of the slide?
Question 8 options:
All energy stays the same, it does not change
The energy is destroyed
Kinetic energy would turn in to Potential energy at the bottom
Potential energy from the top of the slide would turn to Kinetic energy as they slide down, in turn the kinetic energy of the child coming down the slide will be given to the child sitting at the bottom when they collide.
Question 9 (3 points)
Conservation of mechanical energy is defined as
Question 9 options:
Energy of motion
Potential energy added to kinetic energy
Law of conservation of energy
The sum of the kinetic and potential energies of an object remains a constant value unless there are forces acting on the object that cause a loss of energy overall, such as friction and air resistance
Question 10 (3 points)
Which is an example of gravitational potential energy only.
Question 10 options:
a puppy walking around under a tree
an apple resting on the teacher’s desk
a rolling skateboard going down a hill
an elevator moving up to the 3rd floor
Answer:
kinetic energy is least at the top of the swing when u are still for a moment just before falling down because kinetic energy was converted to potential energy ND the total amount of energy was conserved just before it hit the ground and reach a speed of 28m/sall the options can increase the gravitational potential energy a jogger running faster after spotting a mountain lion following him on the trial turning a different direction at the end of the aisle while continuing to move at the same speed kinetic energy will turn to potential energy at the bottom potential energy from the top slide will turn tokinetic energy as they slide down, in turn the kinetic energy of the child coming down to the slide will be giving to the child sitting at the bottom when they collidepotential energy added to kinetic energy an Apple resting on the teacher's deskwhat is the first step in this process
the answers to the Lab: Calorimetry and Specific Heat
step3:
aluminum- 11.98
copper-12.14
iron- 12.31
lead- 12.46
step5: 12.46, 52.31, 39.85
step7: 100, 22.4, 27.1, 4.7, 72.9
step5: 12.26, 52.49, 40.13
step7: 100, 22.7, 24.6, 1.9, 75.4
step5: 12.42, 52.66, 40.24
step7: 100, 22.5, 24.9, 2.4,75.1
step5: 12.34, 51.99, 39.65
step7: 100, 22.6, 23.3, 0.7, 76.7
step8: 0.90,0.35,0.44,0.12
Answer:
Thank you! Thank you! Thank youuuuuu
Explanation:
You saved my buttt!?!???!?!?!!?
Which process is a genetic engineering process?
exposing food to radiation, which causes mutation in the genes
removing DNA from cells of the food
replacing some genes of the food with genes from other species
protecting food with an antimicrobial coating
Answer:
The third option should be right
Answer:
C.
Explanation:
edg. 2020 just took the test
PLEASE HELP!!! A dive tank at 3000 psi has a temperature of 30° C on the boat. What would the pressure be when diving in 14° C water? Assume the volume and number of particles stayed the same.
The pressure would be 2841.59 psi
Further explanationGay Lussac's Law
When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
P₁=3000 psi
T₁ = 30+273=303 K
T₂=14+273=287 K
[tex]\tt P_2=\dfrac{P_1.T_2}{T_1}\\\\P_2=\dfrac{3000\times 287}{303}\\\\P_2=2841.59~psi[/tex]
What’s the difference between a learned behavior in an inherited behavior? Give one example of each
Answer:
short answers:
A learned behavior is a behavior that develops during an animal’s lifetime.
Examples of learned behaviors include tying one’s shoes or solving a math problem.
An inherited behavior is a behavior that an animal is born with.
An example of an inherited behavior is a bird building a nest.
Explanation:
Learned behaviors are those which are gradually developing in us through learning at different ages and it takes time. Inherited behaviour is innate to us which are incorporated with us by birth.
What is learned behaviour?An organism develops a learned behavior as a result of experience. In contrast to learned actions, inherent behaviors are genetically preprogrammed and can be carried out without any prior knowledge or instruction.
Certain behaviors have features that are both acquired and innate. Zebra finches, for instance, have a genetic predisposition to learn a song, but the song they sing is influenced by what they hear from their dads.
Inherited behaviors are inherited from parents to their offsprings. Such as similar nature in sound, angriness, some diseases etc. They are not gathered from any experience and are accompanied by birth.
To find more on learned behaviours, refer here,
https://brainly.com/question/28579889
#SPJ2
Need a bit of help with this. Fill in the coefficients, explain your answer.
Answer:
4Fe + 3O₂ → 2Fe₂O₃
General Formulas and Concepts:
Chemistry - Reactions
Balancing ReactionsExplanation:
Step 1: Define
RxN: Fe + O₂ → Fe₂O₃
Step 2: Balance
We need to balance both Fe and O.
LCM of 2 and 3 is 6:
Fe + 3O₂ → 2Fe₂O₃
We now need the same amount of Fe on both sides:
4Fe + 3O₂ → 2Fe₂O₃
Select the correct answer.
What are the oxidizing agent and the reducing agent in this chemical equation?
3FeS + 8HNO3 → 3FeSO4 + 8NO + 4H2O
A.
FeS is the oxidizing agent, and HNO3 is the reducing agent.
B.
HNO3 is the oxidizing agent, and NO is the reducing agent.
C.
FeS is the reducing agent, and HNO3 is the oxidizing agent.
D.
HNO3 is the reducing agent, and NO is the oxidizing agent.
Answer:
Its answer choice C
Question
Review the electron configurations of the elements in period 3, from sodium (Na) to argon (Ar). What do you observe?
Select the correct answer.
The electron configuration for chlorine does not follow the pattern of the other elements in period 3.
After the 3s sublevel is filled with two electrons, each additional electron goes into the 3p sublevel.
O After the 3p sublevel is filled with six electrons, each additional electron goes into the 3s sublevel.
The electron configuration of magnesium does not follow the pattern of the other elements in period 3.
Submit
Part B
us 12
Answer:
B-After the 3s sublevel is filled with two electrons, each additional electron goes into the 3p sublevel.
Explanation:
Edmentum
What does how light or dark an object appears depend on?
Answer:
By the wavelength of the light transmitted by it.
Explanation:
The color of a transparent object is determined by the wavelength of the light transmitted by it. An opaque object that reflects all wavelengths appears white; one that absorbs all wavelengths appears black.
Electron configuration of vanadium-52
Answer:
[Ar]4s23d3
Explanation:
Which energy transformation occurs in an
electric motor?
Answer:
Electrical energy to mechanical energy
Explanation:
In an electric motor, the energy transformation that is involve is a move from from electrical energy to mechanical energy.
For every system, according to the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".
An electric motor converts electrical energy to mechanical energyThe electrical energy passes through and electromagnet set up. This then cause the motion to rotate. Therefore, electrical energy is transformed to mechanical energy.if two molecules of glucose (c6h12o6) are joined via condensation synthesis, the resulting molecule would have a molecular formula of .
The condensation reaction between two molecules of glucose would result in the formation of maltose (C12H22O11) and the release of water.
Carbohydrates are organic compounds that are used to store energy. An example of a carbohydrate is glucose, which is a single sugar or a monosaccharide. The process of forming larger molecules from the combination of simple sugars is called the condensation process. A water molecule is released in the process of combining the molecules together through a glycosidic bond.
The condensation reaction for two molecules of glucose (C6H12O6) results in the formation of maltose, a disaccharide, and the release of water. The molecular formula of maltose is C12H22O11. It can be observed that the condensation reaction shown below is balanced.
Glucose (C6H12O6) + Glucose (C6H12O6) → Maltose (C12H22O11) +H2O
To learn more regarding the condensation reaction of sugars, please refer to https://brainly.com/question/24950735.
#SPJ4