ILL GIVE BRAINLY, 5 STARS , FOLLOW AND HEARTS
which of the following best tells the meaning of the word energy?
Answers
Answer:
Second one
Explanation:
I think it's the second cause there's no energy w/o heat. So it's the second.
Answer:
The second option
Explanation:
Related Questions
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 ^^
Which statement describes the Loyalists in North Carolina during the colonial era? They were mostly wealthy and educated. They were also known as Whigs. They wanted to be free of British rule. They wanted to remain part of Britain.
Answers
Answer:
D) They wanted to remain part of Britain
Explanation:
i took the test lol
Answer:
D
Explanation:
“Selective” means to pick and choose; “permeable” means objects can pass through something. Do you think cell membranes are “selectively permeable”? Give evidence to support your answer.
This is due at 4 p.m.
Answers
Answer:
yes the cell membranes are semi permeable
Convert 62.5 L to mm
3
Answers
Answer:
0.0625
Explanation:
Answer:
62,500
Explanation:
How many elements are in C8H3NaBr12?
Answers
Answer:
I don’t get it you have to go more into detail lol then I’ll answer
Explanation:
giving brainliest ✅✅
5. Which reaction is an example of heterogeneous catalysis? (1 point)
A Ethene gas reacts with hydrogen gas by using a nickel catalyst.
B Hydrogen peroxide decomposes by using an aqueous iodide ion catalyst.
C Formic acid decomposes by using an acidic catalyst.
D Sulfur dioxide gas is converted to sulfur trioxide gas by using nitrogen chloride gas.
Answers
Answer:
A
Explanation:
A common example of heterogeneous catalysis is the hydrogenation reaction of simple alkenes. The conversion of ethene (C2H4) to ethane (C2H6) can be performed with hydrogen gas in the presence of a metal catalyst such as palladium (“Conversion of Ethene to Ethane with Hydrogen and a Metal Catalyst”).
Answer:
A
Explanation:
edge
Is the average atomic mass of a sample containing three lithium-6 and two lithium-7 closer to the mass of Li-6 or Li-7 ?
Answers
The average atomic mass of a sample closer to the mass of Li-6
Further explanationIsotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.
So Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu
Mass atom X = mass isotope 1 . % + mass isotope 2.%
three Li-6, mass number = 6
two Li-7, mass number = 7
total abundance = 5
abundance for Li-6 =
[tex]\tt \dfrac{3}{5}\times 100\5=60\%[/tex]
abundance for Li-7 =
[tex]\tt \dfrac{2}{5}\times 100\5=40\%[/tex]
Average atomic mass :
[tex]\tt (0.6\times 6)+(0.4\times 7)=6.4[/tex]
7th grade help me plzzzzzzz
Answers
Answer:
15 atoms
increases
Explanation:
10 hydrogen atoms + 5 oxygen atoms = 15 atoms
1. Which of the following is an example of a chemical reaction? *
O A. mixing lemonade powder with water
O B. burning marshmallows over a fire
O C. melting butter in a pan
D. boiling water on a stove
Answers
Answer:Burning marshmellows over fire
Explanation:
Predict what would happen if a positive charge is placed between the two charges and allowed to move. Explain.
Answers
Answer: The same effect happens when you put two electrons near each other (or two protons). We know that if you have a single positively charged particle, a positively .
Explanation: i hope that helped. have a good day.
24H2S + 16HNO3 3Sg+ 16NO + 32H2O
Answers
Answer:
24 sultur with 48hydrogen+16 hydrogen,nitrogen and 48 oxygen+16 nitrogen,16 oxygen+62hydrogen and 32 oxygen
Explanation:
A gas is heated from 203.0 K to 298.0 K and the volume is increased from 24.0 liters to 55.0 liters by moving a large piston within a cylinder. If the original pressure was 1.00 atm, what would the final pressure be?
Which Gas Law did you use?
The numerical answer to the question.
An explanation of the correct number of significant figures you will use for the numerical answer
Answers
Answer:
P₂ = 0.6406 atm
Explanation:
Given data:
Initial volume = 24.0 L
Initial pressure = 1.00 atm
Initial temperature = 203.0 K
Final temperature = 298.0 K
Final volume = 55.0 L
Final pressure = ?
Solution:
According to general gas equation:
P₁V₁/T₁ = P₂V₂/T₂
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₂ = P₁V₁ T₂/ T₁ V₂
P₂ = 1 atm × 24.0 L × 298.0 K / 203.0 K × 55.0 L
P₂ = 7152 atm .L. K / 11165 K.L
P₂ = 0.6406 atm
When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value.
Thus we will include four significant figures in answer because 7152 have four significant figure.
HELP! HELP!
an element with 5 protons, and 8 electrons has an atomic number of?
Answers
Answer:
Explanation: 15
What effect does the spinning of the earth's core have?
A.it creates gravity
B. it creates matter
C. it creates mass
D. it creates the earths magnetic field.
Answers
Answer:
c
Explanation:
its c
Earth contains a spinning electric filed. The spinning of earth core creates its magnetic field. Thus, option D is correct.
What is a spinning body?A body which rotates in its own axis is called a spinning body. Earth rotates about its along with revolving around sun. The outer core of earth generates electric current. This is called telluric current.
Flow of this current creates an electric current which is parallels to the surface of earth. The direction of magnetic field lines will be perpendicular to the direction of current. But it comes stronger when parallel to current.
A rotating electric current results in the generation of a magnetic field. Thus spinning of earth core generates a magnetic field and therefore, option D is correct.
To learn more about magnetic field, refer the link below:
https://brainly.com/question/11514007
#SPJ2
Which air is driest?
Air Temp 66F Dew-point 60F
Air Temp 77F Dew-point 19F
Air Temp 50F Dew-point 36F
Air Temp 30F Dew-point 29F
Answers
Answer: 2nd option
Explanation: took the quizz
ill give brainlist if you get it righttt...Radiant energy travels in the form of electromagnetic waves. Which statement describes how electromagnetic waves and sound waves are alike? (Hint: How are all waves alike?)
Question 6 options:
Both types of waves have an electrical and magnetic field
Both types of waves can travel in space
Both types of waves are mechanical waves
Both types of waves transfer energy
Answers
Answer:
Both types of waves transfer energy
Explanation:
I think that's right
Electromagnetic waves and sound waves both types of waves can transfer energy.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
Learn more about electromagnetic waves,here:
https://brainly.com/question/3001269
#SPJ3
please help ASAPPP
will mark brainliest!!!
Answers
The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms
______________________________________HOPE IT HELPS!Cynthia constructed a small device called a catapult shown below.
The catapult is able to accelerate objects in order to propel them in a certain direction. After placing a small toy in the end of the spoon, she pulls back with her finger on the tip of the spoon to a point and releases.
She uses toys of the same shape and size, but different masses and compares how much each travels when released. Which of the following is Cynthia most likely trying to demonstrate with her device?
A.
Newton's universal law of gravitation
B.
Newton's third law of motion
C.
Newton's first law of motion
D.
Newton's second law of motion
Answers
Answer:
Awnser: D,Newtons second law of motion
I will mark brainliest!
Which particle has a high rate of deposition?
A. a low-density particle
B. a small particle falling off a cliff
C. a particle with jagged, rough ends
D. a large round particle settling on a surface
Answers
Answer:
C ! :)
Explanation:
Answer:
The correct answer is A
Explanation:
LOW-DENSITY PARRTICLE
plsssssssssssssssssssssssssssssssssssssssss help me
Answers
Answer:
C
Explanation:
A year is a complete revolution around the Earth
What is the cost to drive to Los Angeles from San Francisco a distance of 405 miles if the cost of gasoline is $2.90 a gallon and the car get 25 miles per gallon of gas?
Answers
Answer: $46.98
Explanation:
The distance to drive to Los Angeles from San Francisco is 405 miles. Since the car get 25 miles per gallon of gas, for 405 miles, the car will use:
= 405/25 = 16.2 gallons
Since the cost of gasoline is $2.90 a gallon and the car will use 16.2 gallons. The cost will be:
= $2.90 × 16.2 gallons
= $46.98
0.28gram of NH3 on decomposition gave 0.25gram of nitrogen and hydrogen. Find the volume of hydrogen evolved at Ntp. (2gram hydrogen at NTP= 22.4liter)
Answers
The volume of H₂ evolved at NTP=0.336 L
Further explanationReaction
Decomposition of NH₃
2NH₃ ⇒ N₂ + 3H₂
conservation mass : mass reactants=mass product
0.28 NH₃= 0.25 N₂ + 0.03 H₂
2 g H₂ = 22.4 L
so for 0.03 g :
[tex]\tt \dfrac{0.03}{2}\times 22.4=0.336[/tex]
Atoms that gain
an electrons
have a _____
Charge?
Answers
Answer:
positive
Explanation:
chemical reactions make new.....
Answers
Answer:
Chemical reactions make new chemicals or compounds
Explanation:
YW!!
10. When a substance is analyzed using an electron microscope, it is found
to contain only one type of atom.
This substance is
A an element
B. a mixture
C. neither of the other three
D. a compound
Answers
HELPPP OMG THIS IS SO HARD ITS FOR SCIENCE LOL
Answers
Answer:
The nucleus of the atom contains two subatomic particles, the protons which are positively (+) charged and the neutrons which are neutral (no charge).
Explanation:
Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ current.
Answers
I hate virtual school
A student is able to lift 500N weight by applying 100N. What is the mechanical advantage of a simple machine?
Answers
Explanation:
Load=500N
Effort=100N
Now,
We have,
Mechanical advantage= Load / effort
= 500/100
=5
Therefore, mechanical advantage is 5.
Plsss helpppp
im confused
will mark BRAINLIEST
Answers
Answer:
I searched the answer up on Brainly so its not my credit.
Explanation:
The answers D.
"If you have learned that metal + nonmetal ⟶ ionic bond, the answer is D, because N and C are the only pair of nonmetals.
However, if you have learned that a bond is ionic if the electronegativity difference (ΔEN) between the two atoms is greater than 0.7, the answer is A, B, and D.
The Li-Cl bond is definitely ionic.
For Na and C, ΔEN =1.62, so the Na-C bond is a highly polar covalent bond.
For Mg and C, ΔEN = 1.24, so the Mg-C bond is a polar covalent."
Hope this helps :D
How many Valence Electrons do Lithium has ??
Answers
Answer:
one valence electron
Lithium has a single electron in the second principal energy level and so we say that lithium has one valence electron. Beryllium has two valence electrons.
- Lumen Learning
Answer:
one
Explanation:
because lithium is the third element with a total of 3 electrons.