the electrons of each atom will be attracted to both nuclii.
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. What is its mass number? *
Answer:
26.981539
Explanation:
Which one has more Thermal Energy? A cup of boiling water or a bathtub of warm water? Explain! Please answer if you can, thank you!! P.S this is science but i just put it as chemistry?
Answer:
See explanation
Explanation:
The thermal energy of a substance is affected both by its mass and by its temperature. Thermal energy is defined as the total kinetic energy of all particles in an object.
Even though the cup of water has a higher temperature, the bathtub has more thermal energy because it contains much more mass of water compared to the cup. It will release more thermal energy to the surroundings compared to the cup of boiling water.
The bathtub of warm water has a higher total thermal energy due to its bigger volume, but the cup of boiling water has a higher average kinetic energy per particle.
The thermal energy of a cup of boiling water is greater than that of a warm bathtub. The sum of all the kinetic energies of the particles in a substance is its thermal energy. The temperature of boiling water is higher than that of warm bathwater. The average kinetic energy of the particles is measured by temperature. The average kinetic energy of the particles in a cup of boiling water would be higher than that of the warm water in a bathtub, which is normally between 38 and 45 degrees Celsius (100 and 113 degrees Fahrenheit), because water has a boiling temperature of 100 degrees Celsius (212 degrees Fahrenheit).
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How many atoms of S are in the following formula: 3Na(SO4)2
1) 6
2) 8
3) 3
4) 5
Answer:
6
Explanation:
at the left.
6.
1. Work equals
A force x distance
B. force - distance
C. force + distance.
The force you apply to a machine
is the
A. input force.
B. output force.
C. efficiency.
2.
The unit of work is the
A. watt.
B. newton.
C. joule.
7.
The efficiency of all real
machines is
A. greater than 100%
B. equal to 100%
C. less than 100%
3.
Power is the amount of
A. work done per unit of time.
B. force on a certain area.
C. pressure in a volume of liquid.
8.
4.
The unit for power is the
A. joule.
B. Meter per second
C. watt.
The fixed point that a lever rotates
around is called the
A. fulcrum.
B. input force.
C. wedge.
9.
5.
A machine cannot change the
A. direction of the input force.
B. amount of work needed to do
A screwdriver is an example of a
simple machine called a
A. pulley.
B. screw
C. wheel and axle.
a task.
C. distance over which a force
is applied
10.
Your front teeth are
A. wedges.
B. levers.
C. compound machines.
Answer:
i know right answer
Explanation:
let me explain
a metal worker uses a cutting torch that operates by reacting acetylene gas, C2H2(g), with oxygen gas, O2(g), as shown in the unbalanced equation below: C2H2(g)=O2(g)= CO2(g) = H2O(g) = heat determine the mass of 25 moles of acetylene (gram-formula mass = 26 g/mol
Answer:
650 grams
Explanation:
Given that acetylene gas reacts with oxygen to produce caobon dioxide, water and heat and the unbalnced equation is
[tex]C_2H_2(g)+O_2(g) \rightarrow CO_2(g) + H_2O(g)+ heat[/tex]
Gram-formula mass of [tex]C_2H_2= 26[/tex] g/mol
So, mass of 1 mole of acelylene is 26 grams
Therefore, mass of 25 moles of acelylene=25x26=650 grams
Hence, the mass of 25 moles of acelylene is 650 grams
The mass of 25 moles of acetylene has been 0.65 kg.
Moles are the count of a number of molecules in an entity and the mass based on the formula mass. 1 mole of a substance has [tex]\rm 6.023\;\times\;10^2^3[/tex] molecules.
The moles can be calculated as:
Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]
Given, mole of acetylene = 25 mol
molecular mass of acetylene = 26 g/mol
Mass of acetylene = moles [tex]\times[/tex] molecular weight
Mass of acetylene = 25 [tex]\times[/tex] 26
Mass of acetylene = 650 grams
1000 grams = 1 kg
650 grams = 0.65 kg.
The mass of 25 moles of acetylene has been 0.65 kg.
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Have you ever seen a building that looks as if it were made out of mirrors? These buildings are made using reflective glass. How would
replacing clear windows with reflective glass affect the temperature inside the building? Explain your ideas.
Answer:
the sun would reflect off of the windows causing less heat to travel into the building
Explanation:
19. Luke wants to create an aqueous solution that conducts electricity. Which of the following compounds should
he use?
a) KNO3
b) C12H22O11
c) C2H5OH
d) NH4OH
Answer:
I think b) C12H22O11.
Hope this answer is helpful for u.
d) velocity ratio =_________ Iload distance
Answer:
velocity ratio is defined as the ratio of distance moved by effort and load in the same time interval
Explanation:
Which will diffuse the most? The particles with the
A. Least potential energy.
B. Most potential energy.
C. Least kinetic energy.
D. Most kinetic energy.
Answer:
B. Most potential energy
Explanation:
brainest plz
Which is a component of John Dalton’s atomic theory?
The ratio of atoms in a compound is fixed.
The atoms of different elements are the same.
An atom is a small particle of matter that can be broken down.
A reaction can create or destroy atoms as well as rearrange them.
Answer: lol the answer is A
Explanation:
i’m just smart like that , thought i should give y’all a clue
Answer:
The ratio of atoms in a compound is fixed.
Explanation:
its a
Which process describes the wearing
away of rock?
A. drainage
B. erosion
C. infiltration
D. weathering
Answer:
weathering
Explanation:
hope this helps
1. An element is defined by the number of:
Electrons
Protons
Neutrons
Chemical Bonds
lons
Answer:
The correct answer for this question would be B) Protons
Explanation:
I got it right on my test (Can I have brainlyest)
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas (n1), and its volume is 46.0 L (V1). If 0.700 mole of gas leak out, and the pressure and temperature remain the same, what is the final volume of the gas inside the cylinder?
Answer:
The volume is [tex]V_2 =15.33 \ L[/tex]
Explanation:
From the question we are told that
The number of moles of the gas is [tex]n_1 = 2.10 \ moles[/tex]
The volume of the gas is [tex]V = 46.0 \ L[/tex]
The of moles of the gas that leaked is [tex]n_2 = 0.700 \ mol[/tex]
Generally from the ideal gas law
[tex]PV = nRT[/tex]
Generally at constant pressure and temperature
[tex]\frac{V}{n} = constant[/tex]
So [tex]\frac{V_1 }{n_1} = \frac{V_2 }{n_2}[/tex]
=> [tex]V_2 = \frac{ V_1 * n_2 }{ n_1}[/tex]
=> [tex]V_2 = \frac{ 46.0 * 0.700 }{ 2.10 }[/tex]
=> [tex]V_2 =15.33 \ L[/tex]
What type of reaction is this?
Zn + K2 CrO 4 --> K + ZnCro4
A) single replacement
B) double replacement
C) decomposition
D) synthesis
Answer:
a) single replacment........................
which two elements make up the main structure of an organic compound?
A. Carbon and oxygen
B. Nitrogen and oxygen
C. Carbon and hydrogen
D. hydrogen and sulfur
Answer:
b nitrogen&oxygen
Explanation:
i'm built different
Atoms and elements are examples of A. molecules. B. mixtures. C. compounds. D. pure substances.
Answer:
atom are very tiny partical
ILL MARK BRAINLIEST NEED HELP ASAP
THE OTHER TWO ANSWER CHOICES WERE
20
40
Consider the following reaction: 3Fe(s) + 4H₂O(g) ➞ Fe₃O₄(s) + 4H₂(g). To answer the following question: "How many moles of hot water vapor (steam) must react to produce 275 g of Fe₃O₄?" How many steps will it take to get the answer? *
4 points
1
2
3
4
Answer: 2
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Fe_3O_4=\frac{275g}{233.5g/mol}=1.18moles[/tex]
[tex]3Fe(s)+4H_2O(g)\rightarrow Fe_3O_4(s)+4H_2(g)[/tex]
According to stoichiometry :
1 mole of [tex]Fe_3O_4[/tex] are produced by = 4 moles of [tex]H_2O[/tex]
Thus 1.18 moles of [tex]Fe_3O_4[/tex] will be produced by=[tex]\frac{4}{1}\times 1.18=4.72moles[/tex] of [tex]H_2O[/tex]
Mass of [tex]H_2O=moles\times {\text {Molar mass}}=4.72moles\times 18g/mol=85.0g[/tex]
Thus 85.0 g of [tex]H_2O[/tex] will be required and 2 steps are required to get the answer.
Match the intermolecular force with the physical property that will result
Answer:
Intermolecular forces are the forces that bind two molecules together. Physical properties are affected by the strength of intermolecular forces. Melting, boiling, and freezing points increase as intermolecular forces increase. Vapor pressure decreases as intermolecular forces increase. Hope this is what your looking for!
Explanation:
Brainliest please?
Which statement best explains what happens to a leaf when it has lost much-needed water?
Answer:
its turgor pressure decreases
Explanation: This is also important because this function regulates water loss within the plant. Lower turgor pressure can mean that the cell has a low water concentration and closing the stomata would help to preserve water. :-)
When a leaf loses much-needed water, its turgor pressure would decrease. Hence Option A is Correct
What is Turgor pressure ?Turgor Pressure is created in the cells of a leaf when there is enough water. The water stretches the cell membrane outward, creating a kind of pressure.
When the cells lose water, the cell membrane shrinks inward and loses the supporting pressure.
Thus, the turgor pressure created by the presence of water is lost by the absence of water.
The absence of water also affects the rate of photosynthesis and transpiration negatively and not positively. A leaf losing water has no bearing on the atmospheric pressure.
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What is another name for a row on the periodic table?
Answer choices :
Group
Period
Family
Transition Metals
2. DETERMINE THE TEMPERATURE AT
WHICH NIO GRAMS OF POTASSIUM
NITRATE DISSOLVE IN 100 GRAMS OF
WATER
Answer:
20 degrees Celsius
Explanation:
what mining biodivirsity
Answer:
Explanation:
Mining affects biodiversity at multiple spatial scales (site, landscape, regional and global) through direct (i.e. mineral extraction) and indirect processes (via industries supporting mining operations, and external stakeholders who gain access to biodiversity-rich areas as the result of mining).
What is the different between stereotyping someone and judging them? paragraph in length please
Answer:
Stereotyping provides humans with the ability to quickly sort out patterns in a randomly diverse world filled with people of every size, shape, gender, age, color, and sexual orientation. And it’s just a quick first pass, nothing more
The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.
my mom !!!Explanation:
Musscle man
Someone please help will mark as brainliest
1. solute is the substance that is being dissolve,while solvent is dissolving medium
2.saturated is solution that contain maximum amount of solut that capable of being dissolve and supersaturated is solution that contain less amount or medium of solut that capable being dissolve : example vinger
3. is a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. For example, two molecules of hydrogen would be written as 2 H2, and two molecules of water would be written 2 H2O . yes it's can be change only in caseWhen you balance an equation you can only change the coefficients
Which liquid has the weakest intermolecular forces?
Answer:
Oil- Only London Dispersion Forces (the weakest intermolecular force)
Water- London Dispersion, Dipole-Dipole, and Hydrogen Bonding
Liquid or solid water that falls to the ground is called
What constitutes a solar system?
A reaction begins with 130.5g of substance X and substance Y. How many grams of
substance X and Y are there at the end of the reaction?
A) not enough information provided
B) 100g
C) 65.25g
D) 130.5g
Answer:
130.5g
Explanation:
At the of the reaction, the combined mass of X and Y will be 130.5g.
The premise for this conclusion is based on the law of conservation of matter.
This law states that "in a chemical reaction, matter is neither created nor destroyed but changed from one form to another".
In essence, in a chemical reaction, there is no mass loss.
The amount of product in the reaction is expected to be the same as the amount of reactants used in the experiment. When we start with 130.5g then we should end with 130.5g