Answer:
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
Hope this helped.
How many copies of DNA do haploid cells have
Answer:
2 lol
Explanation:
Identify the product of the hydrogenation of the following alkene: CH3 + H2 → A) OH B) CH3 CH3 C) Колата jo sono ue D)
CF = 5, CD = 12, and EF = 5. Solve for the blanks below:
Explanation:
please view picture attached with your question for your answer thank you.
What is the difference between a pure solvent and a solution? Do they have the same physical properties?
Answer:
The physical properties of a solution are different from those of the pure solvent. ... Colligative properties are those physical properties of solutions of nonvolatile solutes that depend only on the number of particles present in a given amount of solution, not on the nature of those particles.
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Landscapes all over the world change due to:
1) Wind
2) Erosion
3) Water
Answer:
Erosion
Explanation:
Wind and water change landscapes by erosion.
An object was measured by a worker as 35.6 cm long, however, the manufacturer specifications list the length of the object at 35.0 cm. What is the percent error in the workers measurement?
What causes dipole interactions?
bonding of a covalently bonded hydrogen to an unshared electron pair
attraction between ions
attraction between polar molecules
sharing of electron pairs
The direct transfer of energy by electromagnetic waves is called __.
Look at this glass of soda. Use your knowledge of thermal energy transfer to explain how heat is affecting the following things: ice, soda, glass, and surrounding air.
Explanation:
Technically, the ice cube melts because the water cools down. This may sound ridiculous at first, but you must consider the fact that the ice melts because it has drawn "heat" (energy) from its surroundings. The "surroundings" being the air and water that surround it (but the water's more important since it's a better conductor of thermal energy).
The surrounding air looses energy while the ice in the glass gains energy.
We know that thermal energy is transferred from a hotter body to a cooler body. If we look as the glass, we will notice that the surrounding air has a greater energy compared to the contents of the glass. The surrounding air looses this energy resulting in the condensation of water vapor in air around the glass.
Similarly, the ice in the glass gains energy and melts. A change of state occurs from solid to liquid as a result of the energy absorbed from the surrounding air.
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If a sample contained 3.01 x 1023 atoms of tellurium, how many grams would this be A) 127.6 g B) 255.2 g C) 63.8 g D) 382.8 g
If a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.
HOW TO CALCULATE MASS:The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass. However, the number of moles contained in 3.01 x 10²³ atoms of tellurium need to be calculated by dividing the value by Avogadro's number as follows:no. of moles = 3.01 x 10²³ ÷ 6.02 × 10²³
no. of moles = 0.5mole
Mass of tellurium = 127.6g/mol × 0.5
Mass of Tellurium = 63.8grams.
Therefore, if a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.
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Which of the following describes wind direction?
Wind direction is reported by the direction from which it originates. For example, a north or northerly wind blows from the north to the south. Wind direction is usually reported in cardinal (or compass) direction, or in degrees.
What is a solar eclipse? *
When the Moon is completely dark
When part of the Earth is completely dark
When the sun explodes
A person who controls access to the decision maker is called a(n)
Answer:
Wdym?
Explanation:
I don't understand this question
Answer:
gatekeeper
Explanation:
2. Mitosis is great for repair and damage. TRUE OR FALSE
Answer:
TRUE
HOPE THIS HELPS!
Explanation:
Answer:
True
Explanation:
What causes lava to not instantly melt ice sheets when it is poured onto it?
Answer:
Dry ice
Explanation:
Answer:
The lava doesn't melt through ice because the steam ice sits on top of a blanket of steam rather than on top of the ice itself. This means the friction between the lava and the ice is very low.
Explanation:
Write the systematic names of the following
I think it's aluminium chloride
A gas has a volume of 350 ml at 45oC. If the volume changes to 400. ml, what is the new temperature in oC
Answer:
It should be 28 degrees C
Explanation:
Answer:
28°C
Explanation:
1.
Which statement correctly describes a major defect of the student model in representing the
structure of a plant cell?
A А
It does not demonstrate the ability to grow and divide over time,
пе
B.
It does not demonstrate the ability to move in response to environmental stimuli,
C
It does not represent the organelles as being submerged in a fluid medium
D. It does not represent multiple types of structure as turning light into food,
define funtional unit?
Answer:
The functional unit of a product system is a quantified description of the performance requirements that the product system fulfils. The functional unit should as far as possible relate to the functions of the product rather than to the physical product.
Explanation:
state the Constituents of the following alloys:magnalium and bronze
Can someone pls help me with a paragraph of what endangered wildlife means ?
Answer:
Endangered wildlife means that something is at risk of extinction.
Explanation:
Hope I helped
What is the highest level of organization for living and nonliving things?
Community
Ecosystem
Family
Population
✨And give a explanation ✨
If you were dividing a recipe in half, which of the following would be the most difficult to scale? OA. One egg OB. A cup of milk Oc. Three medium apples OD. A pint of heavy cream th Reset Next
pls help what’s the answer?
How much pressure does an elephant with a mass of 2200 Kg and a total footprint area of 4500 cm2 exert on the ground?
Answer:
47911.1 pa
Explanation:
The SI base unit of pressure is pascal, which is N/m^2.
2200 kg is 2200*9.8=21560 N, and 4500 cm^2=4500/10000=0.45 m^2.
So the total pressure exerted on the ground (!!) is 21560/0.45= 47911.1 Pa.
I can determine the molar mass of an element by looking on the Answer under the atomic mass for the element.
Answer:
YES that is the molar mass can be found as the atomic mass of a single atom, BUT when you get to larger molecules your molar mass will be a combination of atomic masses.
Explanation:
How many Carbon atoms are shown in the reactants? How many C atoms are shown in the products?
Answer:
Q) How many Carbon atoms are shown in the reactants
Ans) The reactants have one carbon atom
Q) How many C atoms are shown in the products?
Ans) there is one atom on the product side
Which statement describes the difference between covalent bonds and Van
der Waals forces?
A. Covalent bonds form when there is an attraction between
nonpolar molecules, while Van der Waals forces cause two atoms
to share valence electrons.
B. Covalent bonds occur when two atoms share valence electrons,
while Van der Waals forces cause an attraction between positive
and negative ions.
C. Covalent bonds form when two atoms share valence electrons,
while Van der Waals forces cause an attraction between nonpolar
molecules
D. Covalent bonds form from the attraction of positive ions and freely
moving electrons, while Van der Waals forces cause an attraction
between nonpolar molecules.
it
Answer:
C. Covalent bonds form when two atoms share valence electrons,
while Van der Waals forces cause an attraction between nonpolar
molecules
Explanation:
A.P.E.X
The statement that describes the difference between covalent bonds and Vander Waals forces is that covalent bonds form when two atoms share valence electrons, while Van der Waals forces cause an attraction between nonpolar molecules.
What is covalent and Vander waal bonding?Covalent bonds are bonds formed as a result of sharing of electrons between atoms of a compound. Examples of covalent compounds are C2H2, CO2.
On the other hand, van der waal forces are weak electrostatic forces that attract neutral molecules to one another. Examples of van der waal forces are hydrogen bonding.
Therefore, statement that describes the difference between covalent bonds and Vander Waals forces is that covalent bonds form when two atoms share valence electrons, while Van der Waals forces cause an attraction between non polar molecules.
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#SPJ5
a b c or d ..........
Answer:
B
Explanation:
Radiation from ultraviolet rays can cause vision problems and sunburn.
In what way is heat transferred to the tubes? (Hint “touching’”)
Please help
I will give you Brainliest
Answer:
in heat transfer, as the fluid flows along the tube, the wall layers are heated or cooled. temp. variation occurs in the wall layers.
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