Answer:
J.J. Thomson's experiments with cathode-ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. I would describe the structure of an atom as the plum pudding model.
Compound Y dissolves in ethanol but not water what type of bond is Y ?
Covalent Bond.
Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).
Ethanol being both polar and non polar can dissolve covalent compound.
Explain how food is transformed to energy for our bodies.
Imagine you are an astronaut and you travel to a planet with a much larger mass than Earth. How would this affect your weight? Explain your answer. (4 points)
Answer:
Explanation:
It may not make any difference. The information missing is the radius of the planet.
However for the purposes of the question, let us assume that it is roughly the same diameter of the earth. Then the weight of anyone would increase if the mass is all that changes..
The formula governing your weight is F = G * m1 *m2 / r^2. If m1 is the mass of the planet and it increases a lot then m2 (you) should increase. The question is done by a proportion.
In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron configuration of ms1 nd10, where n and m are integers, and m= n+1.
Answer:
Cu, Ag, Au, Rg
Explanation:
The periodic table is an arrangement of elements in rows and columns. The elements with outer electron configuration of ms1 nd10 are Cu, Ag, Au, Rg.
The periodic tableThe periodic table is an arrangement of elements in rows and columns. The rows are called periods while the columns are called groups.
Now we know that the group that is referred to here has an outer electron configuration of ms1 nd10. This corresponds to the elements Cu, Ag, Au, Rg.
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Question 1 (5 points)
(04.01 LC)
Based on the law of conservation of mass, which of the following statements is correct? (5 points)
a
Matter is neither created nor destroyed.
b
Matter can be created but it cannot be destroyed.
The total mass of substances before a reaction is less than the total mass after a reaction.
The total mass of substances before a reaction is greater than the total mass after a reaction.
Matter is neither created nor destroyed. Therefor, option (A) is correct.
What is The Law of Conservation of Mass?The Law of Conservation of Mass is a fundamental principle in science that states that matter cannot be created or destroyed in a chemical reaction, only transformed from one form to another. This means that the total mass of the reactants in a chemical reaction must be equal to the total mass of the products.
The Law of Conservation of Mass was first introduced by Antoine Lavoisier, a French chemist, in the 18th century. The law has been extensively tested and verified through numerous experiments in the field of chemistry. It is an essential concept for understanding the behavior of matter in chemical reactions and for the development of technologies that depend on chemical reactions, such as energy production, medicine, and materials science.
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When reactants are not used to make new substances, are they destroyed?
In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
HELP!!!!
four different liquid compounds in flasks at 20 C are represented above. the table below identifies the compounds. flask c shows the most particles in the vapor phase. which of the following is not shown in the model but best helps to explain why flask c must contain pentane
Answer: C , The strength of the intermolecular forces between the particles in the liquids.
Explanation:
Since we have 4 boiling flasks with liquids that are at a temp of 20⁰C and out of them all, flask C the has most amount of vapour Particles inside of it, because of that we can conclude that it has the weakest Intermolecular force out of the rest of the boiling flasks since at a temp of 20⁰C it has the most amount of gas particles compared with the other flasks, and not to forget the data in the graph shows us the formula and boiling point of flask C that contains pentane and from that data given we can tell that since the boiling point of pentane Is low then it has to have a weak intermolecular forces, causing it to have more vapour Particles than other flasks, proving the answer to be C since showing the strength of the attraction will explain everything we need to know about flask C and why does it have more vapour Particles than the other flasks.
Note:
(A) is not the answer since all the liquid particles in each flask are in random constant motion at a temp of 20⁰C so it does not justify why flask C has more vapour Particles.
(B) is not the answer since showing the relative speeds of each vapour Particle will not justify why flask C has the most amount of gas particles with the respect of its temperature.
(D) is not the correct answer since we already have data given in the graph about the boiling point of pentane and it's formula so showing the particulate representation is useless.
The best explanation is the strength of intermolecular force between the particles in a liquid. Thus option C is correct.
What is intermolecular force?Intermolecular force is defined as the attractive and repulsive force that rises between the molecules of a compound. They are electrostatic in nature.
There are basically five type of intermolecular force.
Dipole-Dipole interactionIon Dipole interactionIon induced dipole interactionDipole induced dipole interactionDispersion forceThe first three forces are collectively known as Vander wall force.
Thus, the best explanation is the strength of intermolecular force between the particles in a liquid. Thus option C is correct.
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If an object absorbs all the light that hits it, the object appears to be
The organelle that move proteins and other substances through the cell is the
Answer:
Endoplasmic reticulum
Explanation:
A sample of H2 gas (12.28 g) occupies 100.0 L at 400.0 K and 2.00 atm. A sample weighing 9.49 g occupies ________ L at 353 K and 2.00 atm.
Considering the ideal gas law, a sample weighing 9.49 g occupies 68.67 L at 353 K and 2.00 atm.
Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P× V = n× R× T
In this case, you know:
P= 2 atmV= ?n= [tex]9.49 gramsx\frac{1 mole}{2 grams} = 4.745moles[/tex] being 2g/mole the molar mass of H2, that is, the amount of mass that a substance contains in one mole.R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 353 KReplacing:
2 atm× V = 4.745 moles× 0.082[tex]\frac{atmL}{molK}[/tex]× 353 K
Solving:
V = (4.745 moles× 0.082[tex]\frac{atmL}{molK}[/tex]× 353 K)÷ 2 atm
V= 68.67 L
Finally, a sample weighing 9.49 g occupies 68.67 L at 353 K and 2.00 atm.
Learn more:
https://brainly.com/question/4147359?referrer=searchResultsPlease count compound list each element and the amount of each and then figure out the total of the atoms
NEED ANSWER ASAP
Answer:
Carbon: 18, Hydrogen: 16, Oxygen: 8
Explanation:
Total # of atoms = 42
Organic
When Newton started studying gravity, the concept of gravity was already in place.
A. True
B. False
describe the manufacture of ethanol from hexane?
Answer:
This page looks at the manufacture of alcohols by the direct hydration of alkenes, concentrating mainly on the hydration of ethene to make ethanol.
The steps in the ethanol production process include milling the corn to meal, liquefying the meal by adding water and cooking, breaking down starch into sugar, using yeast to ferment the sugar to ethanol, distilling the ethanol by boiling off and condensing it by removing residual water and finally denaturing so that...
Help this is so confusing like
Answer: which of the following is qualitative?
A. 100-calorie apple
B. 1-liter soda
C. triangular crystal
D. 10-inch brick
answer is D
Explanation:
Which has more molecules?
A. 1 mole H2O
B. 1 mole Al(OH)3
C. 1 mole NaCl
D. There are all the same
Explanation:
1 mole H2OI hope it's helpful for you
1 mole of H₂O has more molecules than other compounds. The correct option is A.
What are molecules?
A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.
The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a specific substance are present in an object or sample is determined by its quantity.
The tiniest component of any substance is capable of existing independently while maintaining its chemical and physical properties and is composed of one or more elements.
Out of these molecules, water has more molecules than 1 mole Al(OH)₃ and 1 mole NaCl. They don't have the same number of moles.
Therefore, the correct option is A. 1 mole H₂O.
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What increases the concentration of H+ in water ?
Answer:
Acid
Explanation:
What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution
What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 A of current? Ag (aq) e- → Ag(s).
Answer:
need points sorry
Explanation:
When electricity runs through an electric stove, what other type of energy is produced?
A.
heat energy
B.
sound energy
C.
chemical energy
D.
mechanical energy
Cansjhdhsbdhajajajhsbsbshs hahahah she jansbsbsns haha be safe
Answer:
wait what?
Explanation:
brainliest pls
how would you distinguish a simple microscope from a compound one
Answer:
A simple microscope employs a concave mirror. A compound microscope employs a plane mirror at one side and a concave mirror at the other. It contains only one adjustment screw to move the limb up and down for focusing on the object.
Answer:
D po
Explanation:
Sana nakatutulong
#Carry on learning
Pa brainliest po
Which of the following is an organic compound?
sulfur oxide (SO)
sodium chloride (NaCl)
water (H 2O)
carbon monoxide (CO)
Answer:
Carbon monoxide (CO)
Explanation:
Organic compounds are generally any chemical compounds that contain "carbon-hydrogen bonds". Due to carbon's ability to catenate, millions of organic compounds are known. The study of the properties, reactions, and syntheses of organic compounds comprise the discipline known as organic chemistry.
Solve the following problem. What is the mass of the object if it has a density of 657 g/mL and a volume of 32 mL?
Answer:
21,024 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 657 × 32 = 21,024
We have the final answer as
21,024 gHope this helps you
How do catalysts generally affect chemical reactions? A They increase the temperature of the system. B They increase the surface area of the reactants. C They increase the activation energy by introducing enzymes. D They lower the activation energy by providing an alternate pathway.
Answer:
D
Explanation:
A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without itself being consumed by the reaction.
Activation energy is the minimum amount of energy required for a chemical reaction to proceed in the forward direction.
A catalyst increases the reaction rate by providing an alternative pathway or mechanism for the reaction
Complete the sentence. When a base is added to water, hydrogen ions __________.
Answer:
Explanation:
Decreases
Answer:
Hydrogen ions decrease. It reduces the concentration of ions.
Explanation:
What is the concentration of a solution containing 1.0 g of sodium hydroxide in 250 cm³ of solution?
A- 0.025 mol/dm³
B- 0.10 mol/dm³
C- 0.25 mol/dm³
D- 1.0 mol/dm³
Answer:
Correct option is
D-1.0mol/dm³
Mass of NaOH (m) = 1g
The volume of water (V) = 250 ml
Mol. wt of NaOH (m) = 40g/mol
Molarity (M) =M×V(ml)m×1000
M=40×2501×1000
M=101 or 0.1 M
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An ice rink has the least amount of friction.
Any smooth surface has the least amount of friction.I hope this helped at all.
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An Ice rinkas heat is added to melt ice. Does the temperature change?
Answer:
Depending on the deformity it will depend on the amount of the ice that is melted,it the majority is melted that is relevant to the heated liquid melting the ice,so yes only the water formalities of the melted ice.
What were the first 5 planets that were observed? Why were those the only ones? Help pls!
What is obesity and hemoglobin?
Answer:
obesity means having too much fat
hemoglobin is a protein in red blood cells .
for example if your hemoglobin is low you are anemic.
obesity if you are overweight your health is at risk because of excess fat.