Answer:
classes
Explanation:
What factor affects the color of a star?
Answer:
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Explanation:
Answer:
1) color of a star is determined by its temperature. 2) the luminosity is determined by its size.
Explanation:
Under what conditions would pressure affect the reaction rate?
O A. If the reaction requires the use of a catalyst
B. If the reaction takes place between a solid and a liquid
C. If the reaction is between two liquids
O D. If the reaction occurs in the gas phase
what? what do you want
a material has volume 4.52m^3 and density 8.61kg/m^3. the mass of this material in scientific notation is 3.89 X 10^2 g
is it true or false?
.
Which charge kept the electrons in the atom?
Enter the answer
Check it
Answer:
hope it helps
Explanation:
Electrons are kept in the orbit around the nucleus by the electromagnetic force, because the nucleus in the center of the atom is positively charged and attracts the negatively charged electrons.
What mass to the nearest tenth of a gram, is needed to balance this chemical
reaction equation?
16AI
+
35
-
8AIS
8
2 3
+
7.4 g
24.5 g
24.5 g
o
17.1 g
131.99
None of the above
none of the above. is the answer
Help me pleaseee
C3H8 (g) + 5 O2 (g)
->
3 CO2 (g) + 4 H2O (9)
1. Use stoichiometry to determine how many moles of O2 are needed
to completely react with 2.25 moles of C3H8.
Answer: 11.25 moles of [tex]O_2[/tex] will be required to completely react with 2.25 moles of [tex]C_3H_8[/tex].
Explanation:
The balanced chemical equation is:
[tex]C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)[/tex]
According to stoichiometry :
1 mole of [tex]C_3H_8[/tex] require = 5 moles of [tex]O_2[/tex]
Thus 2.25 moles of [tex]C_3H_8[/tex] will require=[tex]\frac{5}{1}\times 2.25=11.25moles[/tex] of [tex]O_2[/tex]
Thus 11.25 moles of [tex]O_2[/tex] will be required to completely react with 2.25 moles of [tex]C_3H_8[/tex].
2. How many formula units in 7.25 moles of Al2O3
Answer:
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Explanation:
Temperature is not a direct measure of thermal energy of a system the total energy depends on its temperature and what other factors?
Answer:
See explanation
Explanation:
There are two main factors that affect the magnitude of thermal energy of a system.
The thermal energy of a system depends on
i) Temperature of the body
ii) Mass of the body
Thus, the greater the mass of a substance at a particular temperature, the greater its thermal energy. Also, at a higher temperature, an object has greater thermal energy.
What is a chemical symbol? Give an example.
Answer:
zero two is bae
Explanation:
Help please I have 10 min.
Answer:
i cant see the question. i can try to help if you tell me the question.
Explanation:
also how do i use the comments???
Why is it important to plants and animals that photosynthesis occurs?
what is the meaning to friction books
Answer:
deje goodmorning
Answer:
What percentage of the total atomic mass of carbon monoxide (CO) is composed of carbon?
43%
73%
29%
57%
Answer:
i think it is 43
Explanation:
hope it helps:0
There are 12 inches in 1 foot and 2.54cm in 1 inch. How many feet are in 325 cm?
Answer:
27.0833 feet
Explanation:
How do most cells in your body sense their surroundings?
O they touch things
O they see things
they smell things
they hear things
O all these answers are correct
Im giving big points for this and if you answer correctly I will give brainliest.
Answer:
[tex]\boxed {\boxed {\sf 447,560 \ Joules}}[/tex]
Explanation:
We are asked to find the energy required to melt 1340 grams of ice. We are given this formula:
[tex]Q=mL[/tex]
In this formula, Q is the heat, m is the mass, and L is the latent heat.
For this problem, the mass is 1340 grams of ice. Since we want to melt the ice, we need the latent heat of fusion (melting) which is 334 Joules per gram.
[tex]m= 1340 \ g \\L= 334 \ J/g[/tex]
Substitute the values into the formula.
[tex]Q= (1340 \ g )( 334 \ J/g)[/tex]
Multiply. The grams will cancel each other out.
[tex]Q=1340 *334 \ J \\Q=447560 \ J[/tex]
447,560 Joules of energy are needed to melt 1340 grams of ice.
Write a scientific explanation that compares the electrical forces of ethanol, hexane, and water.
Claim:
Evidence:
Reasoning:
Answer:
"Water and ethyl alcohol will both have dipole-dipole interactions.
Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges.
Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces."
Explanation:
Here is the place I found the answer: https://socratic.org/questions/which-of-these-structures-has-dipole-dipole-interactions-water-h2o-ethyl-alcohol
All of this answer belongs to that person. I do not own any of this information.
Mr. Wang works in a recycling center. Recyclable materials arrive at the center mixed. Workers use magnets to separate steel cans from other items. Which two statements are true about the force between a steel can and a magnet?
Answer:
Option 3, The attraction between the can and the magnet is a pull.
Explanation:
The complete question is
Mr. Wang works in a recycling center. Recyclable materials arrive at the
center mixed together. Workers use magnets to separate steel cans from
other items. Which two statements are true about the force between a steel can and a magnet?
1 Gravity pushes the can toward the magnet.
2 The force between the can and the magnet is a noncontact force.
3 The attraction between the can and the magnet is a pull.
4 The attraction between the can and the magnet is a push
Solution
The force exerted by magnet on steel is the pull force. In magnets unlike poles attract each other (pull force) while the like poles repel (push force). Now, the steel or any ferrous object in the garbage when experience magnetic field develop magnetic field of their own in such a way that their north always faces the south of the external magnet or vice versa.
Hence, the force between a steel can and a magnet is pull force
Questlon 5 of 5
What is the main source of energy for plants?
A. Oxygen
B. Water
C. Soil
D. Sunlight
Answer:
D Sunlight
Explanation:
Hoped that helped :)
What does it mean for a solution to be saturated?
A. The solute will not dissolve in the solvent.
B. The solution contains more solute than should be possible.
C. More solute can still be added to the solution.
D. The maximum amount of solute is dissolved in it.
Answer:
D. The maximum amount of solute is dissolved in it.
Answer:
D. The maximum amount of solute is dissolved in it.
Explanation:
Help ASAP pls will make brianlist
Answer:a+b
Explanation:
What type of reaction is shown here?
Al(OH)3 ---> Al2O3 + H2O
Answer:
Chemical Equation Balancer
Explanation:
What is the natural reason for the rising surface temperatures of the Pacific Ocean, drought in the western United States, and flooding on the Pacific coast of South America? Is it the Jet Stream, the Gulf Stream, La Niña, or El Niño? This is a science question about weather.
Answer:
El Niño
Explanation:
The natural reason for the rising surface temperatures of the Pacific Ocean, drought in the western United States, and flooding on the Pacific coast of South America Is the El Niño.
El Niño is a climate pattern that happens when there is an unusual warming of the surface temperatures of the Pacific Ocean. This occurs at an interval of two to seven years
During El Niño, the surface waters of the Pacific Ocean become warmer than average and this is as a result of the weakness of trade winds which blows over the entire Pacific Ocean. This makes the atmospheric pressure above the ocean to decrease.
El Niño brings rainfall nd flooding to South America and droughts in the western United States
Which family on the periodic table has elements whose electron configurations end in
p4?
Answer:
Elements Ending with s2p4 = the Oxygen Family
Element Atomic Number
Oxygen (O) 8
Sulfur (S) 16
Selenium (Se) 34
Tellurium (Te)
Explanation:
I NEED YALLS HELP ILL BRAINLIST/5 Star !! Answer in full sentence if u can.
In the Bohr model of the atom, what is the maximum number of electrons that the second electron shell can contain?
how many oxygen molecules are in 5.17g of oxygen gas
Answer:
is cool is cool goodcripopo
How much heat must be added to raise a sample of 100.g of water at 270K to 280K?
Answer:
10 Kelvin
Explanation:
this is so simple...
if you want to raise the temp from 270K to 280K just add 10K
According to specific heat capacity, 4200 joules of heat must be added to raise a sample of 100.g of water at 270 K to 280 K.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT , on substitution of values on given formula, Q= 100×4.2×10=4200 Joules
Thus, 4200 joules of heat must be added to raise a sample of 100.g of water at 270 K to 280 K.
Learn more about specific heat capacity,here:
https://brainly.com/question/29766819
#SPJ6
WILL VOTE BEST & GIVE 25 POINTS - PLEASE ANSWER
Your mom needs some pills from the Walgreens pharmacy for her diabetic medication. If one of the
pills weighs 650mg and the technician weighs exactly 15.6g of pills, how many pill were dispensed
and placed into the pill bottles. Show all work with units.
Answer:
24 pills
Explanation:
650 mg/1000 = 0.65 g
(There are 1000 mg in one g)
15.6g/0.65g=24
two students performed an investigation
Answer:
what was the investigation ???
Which of these pair of elements has the GREATEST electronegativity:
Calcium (Ca)
or Selenium (Se)
Answer:
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