Answers
Answer: is C&A
Explanation:the electric motor converts electricity in to mechanical energy
the electric generator converts mechanical energy to electricity so it could not be D.
and they don't use batteries as their main source of power so it could not be B.
hence forth it is C&A
HOPE THIS HELPS!!!!!!1
PLEASE MARK BRAINLIEST!!
Related Questions
As a result of the Law of Conservation of Mass, during a chemical change the mass of the
products are equal to the mass of the:
A. particles
B. elements
C. reactants
D. compounds
Answers
Answer:
D. Reactants.
Explanation:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Which of the following is a hypothesis for an experiment measuring solubility of sodium sulfate?
A. O Sodium sulfate will dissolve better in cold water
B.
Sodium sulfate is toxic (poisonous; deadly) to humans.
c. Add sodium sulfate to water
D. O Sodium sulfate is a white powder
Answers
8.
Blank is the transfer of energy by electromagnetic waves.
Your answer
Answers
In photosynthesis, what are the polar molecules?
Answers
Answer:
in photosynthesis polar molecules are molecules that have a diffrent arangment in molecules for example polar water molecule is when oxegen is on one end and the hydrogen is on the other. olmost any compound can have a polar or non polar molecule.
Explanation:
I NEED HELP!!!!!!!!!!! PLEASEE!!!!!!!!!!!!!!!!!!!!!!!!!!!
Now write the abbreviated electron configuration for calcium. However, substitute [Ar] for the 1st 18 electrons of calcium. What is the electron configuration now?
Answers
Answer:
[Ar]4s²
Explanation:
The electronic configuration of calcium is given as follows;
1s²2s²2p⁶3s²3p⁶4s²
The electronic configuration of argon, Ar is 1s²2s²2p⁶3s²3p⁶
Given, that there is a similarity be tween the electronic configuration of all the shells of the an atoms of argon and an atom calcium, except for the added valence shell electrons in calcium, the electronic configuration of calcium can be represented by the symbol of an atom of argon, followed by the electonic configuration of the valence shell as follows
The electronic configuration of calcium with argon as base = [Ar]4s².
The density of water is 1.00 g/mL. Which substance below can float on water?
Answers
Answer:
ice, air, ducks and fabric
Explanation:
its common sense
The tendency of an atom to attract electrons to itself is ionization energy. effective nuclear charge. electron affinity. electronegativity.
Answers
Answer:
electronegativity
Explanation:
Answer:
THe tendoncy is electronegstivity
Explanation:
Im a big brain person
What is the specific heat of a substance that absorbs 1000 joules of heat when a sample of 25 g of the substance increases in temperature from 10.0C to 60.0C
Answers
Answer:
1250000
Explanation:
Specific heat is mass times specific heat capacity times change in temperature to get chance in temperature minus the old temperature from the new temperature then complete equation hence 25g×1000j×(60-10)
25g×1000j×50
=1250000g/j/degree Celsius
An electron moves from an excited state back to the ground state releasing
4.56 x 10-19 J of energy. a) Find the frequency of the photon of light that would be released. b) Find the
wavelength in nm.
Answers
Explanation:
The first step in this problem is to convert the wavelength, λ, to a frequency, ν, and
then calculate the energy of the photon using ε = hν. In such problems you must take
care to use a consistent set of units. We will use S.I. units. Thus,
λ = 18900 Å = 18900 x 10–10 m = 1.89 x 10–6 m
The frequency associated with this wavelength is given by:
ν = c/λ = (3.00 x 108 m s–1 ) / (1.89 x 10–6 m) = 1.59 x 1014 s–1
The energy ε associated with a photon of this frequency is:
ε = h ν = (6.626 x 10–34 J s) (1.59 x 1014 s–1) = 1.05 x 10–19 J
Note -- the ENERGY of this photon corresponds to a DIFFERENCE between
energy levels of the H atom
The energy levels for the H atom are given by:
εn = (–21.8 x 10–19 J) / n2 ; where n = 1,2,3,4,.............
Thus, ε1 = –21.8 x 10–19 J; ε2 = –5.45 x 10–19 J
ε3 = –2.42 x 10–19 J; ε4 = –1.36 x 10–19 J
We now seek an ENERGY LEVEL DIFFERENCE which matches the energy of the
photon.
We see that the electronic transition which gives rise to an EMITTED photon with
energy ε = 1.05 x 10–19 J is:
ninitial = 4 → nfinal = 3
2. A series of spectral lines in emission is characterized by a common value of nfinal -- i.e.
the quantum number of the level at which the transition terminates. Since the 18900 Å
line arises from a transition in which ninitial = 4 and nfinal = 3, the series to which it
belongs is characterized by nfinal = 3. The series limit for this series of emission lines is
the wavelength that would correspond to the transition ninitial = ∞ to nfinal = 3
From the energy level expression given in problem1 we see that:
ε∞ = (–21.8 x 10–19 J) (1/ ∞2) = 0
Could cellular respiration
happen without photosynthesis? Explain your
reasoning
Answers
Answer:
No
Explanation:
Without photosynthesis, there would be no sugar, without which there could be no cellular respiration.Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.
The reaction for the combustion of acetylene is shown. Explain why this reaction is a redox reaction by identifying the oxidation numbers that change, what is oxidized, what is reduced, and what happens to the electrons during the reaction. 2C2H2 + 5O2 → 4CO2 + 2H2O
Answers
Answer:
2 C2H2 (g) + 5 O2 (g) → 4 CO2 (g) + 2 H2O (l)
Explanation:
Redox reaction: In this type of reaction, oxidation and reduction reaction occurs simultaneously in same chemical reaction.
2C_2H_2+5O_2\rightarrow 4CO_2 + 2H_2O2C
2
H
2
+5O
2
→4CO
2
+2H
2
O
This reaction is a redox reaction :
Removal of hydrogen or addition of oxygen is termed as oxidation. in above reaction, removal hydrogen from acetylene gives carbon-dioxide.
Removal of oxygen or addition of hydrogen is termed as reduction. in above reaction, removal of one oxygen atom from oxygen molecule with addition of two hydrogen atoms gives water
The oxidation number of carbon in acetylene is -2.
The oxidation number of carbon in carbon-dioxide= +4
Oxidation number of carbon increases after the reaction which means that carbon is getting oxidized.
The oxidation number of oxygen in oxygen gas = 0
The oxidation number of oxygen in water = -2
Oxidation number of oxygen decreases after the reaction which means that oxygen is getting reduced.
The electrons released during oxidation are transferred to the species which are undergoing reduction reaction.
Answer:
Just put this, or something like it:
The oxidation number of carbon changes from -1 to +4.
The oxidation number of oxygen changes from 0 to -2.
Carbon is oxidized.
Oxygen is reduced.
Electrons are transferred from carbon to oxygen.
Explanation:
3. How are the protons held in the
nucleus?
O opposite charges
O strong nuclear force from neutrons
Owhich nuclear wall
Answers
PLS ANSWER FAST!!! HURRY I NEED THIS ASAP!!
Which statement about chemical reaction rates is true?
The reaction rates cannot change.
The reaction rates can increase.
The reaction rates are always constant.
The reaction rates cannot decrease
Answers
Answer:
The reaction rates cannot charge
Explanation:
Answer:
The answer is B
Explanation:
I have the coldest temperature of the atmosphere. Who am I?
Answers
Answer:
Jack Frost of course!!!!!!!
why do the Noble gases have the highest ionization energies across a period?
Answers
Answer:
ionization energy decreases from top to bottom in groups, and increases from left to right across a period. So technically, the noble games have the largest ionization energy.
Explanation:
What can cause heat exhaustion?
exposure to cold
dehydration
improper warm up
windy weather
Answers
Improper warm up causes heat exhaustion.
WHAT IS HEAT EXHAUSTION:
Heat exhaustion is a phenomenon that occurs when a body overheats i.e. cannot cool down. Heat exhaustion can be caused by a variety of reasons but most importantly, heat exhaustion is induced by engaging in physical exercise in hot weather. The body responds to heat exhaustion by heavy sweating, color change in skin etc. These can be considered as signs of heat exhaustion.Therefore, improper warm up of the body can cause heat exhaustion.
Learn more: https://brainly.com/question/3466202?referrer=searchResults
Answer:
The answer above me is wrong. its dehydration. I took the test and obviously the other person doesn't know what they are doing.
Which type of bond is salt? a. covalent b. valence c. metallic d. ionic
Answers
Answer:
D. Ionic
Explanation:
It has ionic bonding! Good luck ^^
Answer please.
Need anwer due in 10 mins.
Answers
Question 2: Which of the following is NOT true about streams?
A. A large stream is called a river
B. All streams flow into the ocean
C. Tributaries are smaller streams
D. All streams flow downslope
Question 3: Which of the following statements is NOT part of the water cycle?
A. Water falls precipitation back to earth
B. Water soaks into the ground
C. Water evaporates from bodies to water on earth
D. Water dissolves minerals from rocks it flows over
Question 4: Which statement best describes a stream with a steep gradient?
A. It flows slowly,producing a wide valley
B. It flows slowly producing a V-shaped valley
C. It flows rapidly producing a V-Shaped valley
D. it flows rapidly producing a wide valley
Answers
Answer:
q 3 c q 2 d
Explanation:
Balance the following chemical equations
Answers
Explanation:
2Na + I₂ → 2NaI 2KClO₃ → 2KCl + 3O₂K₃PO₄ + 3HCl → 3KCl + H₃PO₄State Henry's law. Give an example of Henry's law.
Answers
Answer:
Found this off of google, "Henry's law comes into play every time a bottle of Pepsi (or any other carbonated drink) is opened. The gas above the unopened carbonated drink is usually pure carbon dioxide, kept at a pressure which is slightly above the standard atmospheric pressure."
How many number of oxygen molecules are required to produce 0.22 g of CO2 according to the reaction?
c+o2=co2
Answers
n=.22/44=.005 mole of CO2
from the equation we see the relationship between the moles of co2 and O2 and we find that they have the same number of moles
So we need .005mole of O2
Multiple the number of moles with avogadro’s number to know the number of O2molecules
.005x6.022 x10^23
HURRY ITS IS DUE SOON
Answers
Answer:
use the meaning of the word see what is similar and what is different about them
please someone answer and help :)
Answers
14. A
15. C
16. B
17. F
18. E
scientists studying squirrels in a forest observed that the squirrel population decrease over a period of five years. which statement is the most likely explanation for the decrease in the population?
Answers
Answer:
1.An increment of predators
2.unavailability of food resources due to change in climate causing famine
3.Spread of diseases over time that might kill the squirrels
4.An increment of squirrels which caused high competition on food,thus some of them had to migrate
5.Might be fire break out over some time that caused death to some squirrels in the reasoning of the period of time
If 10 cubic centimeters of a liquid has a mass of
70 grams, what is its density?
A. 0.7 g/cm3
B. 7 g/cm3
C. 70 g/cm3
D. 700 g/cm
Answers
Answer:
V = 10 m³
m = 70 grams
density = ....?
density = m/v
= 70/10
= 7 g/cm³ (B)
PLS HELP ME PLS I'LL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST OR HAS THE BEST ANSWER
Answers
What is true about atoms when they bond? There may be more than one answer.
1. Bonded atoms can never be taken apart
2. Electrons can be transferred
3. They form compounds
4. Compounds have the same characteristics are the atoms that make it up
5. Electrons can be shared
Answers
Answer:
3. 5. and i think thats it
Answer:
3. 5. and i know it is right
Explanation:
Help!!!
If there are 18 moles of HCI gas occupying 12L at 250C, What is the pressure? Be sure to show the set up and the final answer and unit.
Answers
which formula is an empirical formula?
