Answer:
electric force and newtons law
Explanation:
10 Points
Why was Dalton's theory of the atom incorrect?
A. Dalton theorized that atoms were too small to see but they are not.
B. Dalton' theory was correct.
C. Dalton theorized that had negative charges spread throughout them but they are
actually in electron shells.
D. Dalton theorized that atoms were indivisible but they are actually made of smaller
parts.
Reset Selection
Answer:
D
Explanation:
The indivisibility of an atom was proved wrong an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions......
hope i helped
pls mark brainliest,,,,,thanks
John Dalton was the chemist that gave the theory of atoms. His atomic model was incorrect as he said that the atoms cannot be further divided, but they are made of smaller particles. Thus, option D is correct.
What is Dalton's atomic model?Dalton's atomic model stated that all matter is composed of atoms that are made of elements with identical properties and mass. He further stated the formation of the compounds from the molecules.
In the theory, he stated that atoms cannot be divided further and are indivisible. This was proven wrong as the atoms are composed of sub-atomic particles namely, electrons, neutrons, and protons.
Therefore, the statement that atoms are indivisible in Dalton's atomic theory is incorrect.
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How many grams of LiNO2 are required to make 250 mL of 0.75 Molarity solution?
Answer:
159 g OF LiNO2 WILL BE USED TO MAKE 0.25 L OF 0.75 M SOLUTION.
Explanation:
How many grams of LiNO2 are required to make 250 mL of 0.75 M?
First calculate the molarity in mol per dm3
0.75 M of LiNO2 reacts in 250 mL = 250 /1000 L volume
0.75 M = 0.25 L
In 1 L, the molarity of LiNO2 will be:
= (0.75 * 1/ 0.25) M
= 3 mol/dm3 of LiNO2
Next is to calculate the molarity in g/dm3:
Molarity in mol/dm3 = molarity in g/dm3 / RMM.
RMM of LiNO2
(Li = 7 , N =14 , 0 = 16)
RMM = ( 7 + 14 + 16 * 2) = 53 g/mol
Molarity in mol/dm3 = Molarity in g/dm3 / RMM
Molarity in g/dm3 = Molarity in mol/dm3 * RMM
Molarity in g/dm3 = 3 * 53
Molarity in g/dm3 = 159 g/dm3.
So therefore, to make 250 mL of 0.75 M of LiNO2, we use 159 grams of LiO2.
what happens to the zebra molecules once they are eaten by the cheetah?
Answer:
All living organisms need food for their body metabolism. Food helps in the provision of basic nutrients for the body’s survival and growth.
When the Cheetah eats the Zebra, enzymes acts on the Zebra molecules and converts it into smaller molecules.
The smaller molecules broken down are then readily absorbed and used by the cells of the Cheetah.
When designing an engineering solution, certain criteria and constraints must be considered. Criteria are the features of the design that must be kept in mind while solving the problem. A criterion answers the question, What do you want the design to do? A constraint is something that prevents the design from performing at its best. These constraints can include time, resources, and money.
When designing the airbag, what are some criteria you might consider and what constraints would you anticipate in its implementation?
Create a list of at least two criteria and at least three constraints that you must consider in the design. Rank them in order of importance, with the most important ones at the top of the list.
Answer:
The criteria listed in order of importance are;
1) To be inflated in the event of a collision in order to protect the occupants of the front of the vehicle
2) To be able to withstand the load of the breaking force of the occupants in the front seat of the vehicle during a collision
3) To be relatively tough so as to resist being torn on impact with a sharp object
The constraints listed in order of importance are;
1) How is the model design able to sense a collision that requires the airbag to be inflated
2) The uncertainty of the load the airbag will withstand upon collision
3) The possible hazard that could be caused by the gas used to inflate the airbag
4) The usage/interaction tendency between the vehicle occupant and the airbag system
Explanation:
In order to produce an effective design, it is important to be able to foresee the possible deficiencies of an idea so as to be able to mitigate the problems before an actual incident happens.
The criteria that should be considered include:
To be inflated in the event of a collision.Ability to withstand the load of the braking force of the occupants.Durability.It should be noted that when designing an engineering solution, there are some criteria and constraints that must be considered in order to achieve the objective of the engineering solution.
Some of the criteria that should be considered include the fact that it should be inflated in the event of a collision, the ability to withstand the impact of the braking force of the occupants, durability, etc.
The constraints listed include how the model design is able to sense a collision that requires the airbag. The possible hazards that can be caused by the gas. Also, it's vital to consider the interaction tendency between the airbag and the occupants of the vehicle.
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Need help please: How many mL of 0.150 Molarity CaBr2 solution must be used to react with 50 mL of 0.115 Molarity AgNO3?
CaBr2 + 2AgNO3 --> Ca(No3)2 + 2AgBr
Answer:
0.019 L or 19.1 mL
Explanation:
Given the equation of the reaction; we have:
CaBr2 + 2AgNO3 --> Ca(No3)2 + 2AgBr
We must first obtain the number of moles of AgNO3 reacted. This can be obtained from;
Concentration of AgNO3 reacted= 0.115 M
Volume of AgNO3 reacted= 50 ml
Since
Number of moles of AgNO3= concentration of AgNO3 × volume of AgNO3
Number of moles = 0.115 M × 50/1000 = 5.75 ×10^-3 moles
From the reaction equation;
2 moles of AgNO3 reacts with 1 mole of CaBr2
5.75 ×10^-3 moles of AgNO3 reacts with 5.75 ×10^-3 moles × 1 /2 = 2.875×10^-3 moles of CaBr2
Now;
Number of moles of CaBr2= concentration of CaBr2 × volume of CaBr2
Number of moles of CaBr2= 2.875×10^-3 moles
Volume of CaBr2= ????
Concentration of CaBr2= 0.150 M
Hence;
Volume of CaBr2= number of moles of CaBr2/ concentration of CaBr2
Volume of CaBr2= 2.875×10^-3 moles / 0.150
Volume of CaBr2= 0.019 L or 19.1 mL
Answer:
19 mL of CaBr₂ solution should be used to react with AgNO₃
Explanation:
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) react:
AgNO₃: 2 molesCaBr₂: 1 mole50 ml of 0.115 M AgNO₃ react. Since molarity is the number of moles of solute per liter of solution, then you can do the following rule of three: if there are 0.115 moles of AgNO₃ in 1 L, in 0.05 L (being 1 L = 1000 mL, then 50 mL = 0.05 L How many moles are there?
[tex]moles of AgNO_{3}=\frac{0.05L*0.115 moles}{1 L}[/tex]
moles of AgNO₃=5.75*10⁻³
Now we can make a new rule of three to calculate the amount of moles necessary for CaBr₂ to react with moles of AgNO₂: if stoichiometry 2 moles of AgNO₃ react with 1 mole of CaBr₂, 5.75*10⁻³ moles of AgNO₃ with how many moles of CaBr₂ react ?
[tex]moles of CaBr_{2} =\frac{5.75*10^{-3}moles of AgNO_{3}*1 mole of CaBr_{2} }{2moles of AgNO_{3}}[/tex]
moles of CaBr₂=2.875*10⁻³ moles
Being 0.150 the molarity of the CaBr₂ compound, you can apply the following rule of three: if by definition of molarity 0.150 moles are in 1 L, 2.875 * 10⁻³ moles in how much volume is it present?
[tex]volume=\frac{2.875*10^{-3} moles*1L}{0.150 moles}[/tex]
volume=0.019 L
Being 1 L = 1000 mL, then 0.019 L = 19 mL
19 mL of CaBr₂ solution should be used to react with AgNO₃
Write a word equation and symbol equation (including state symbols)
for the reaction of calcium chloride with sodium hydroxide
Answer:
Explanation:
Calcium chloride reacts with NaOH to produce the Calcium hydroxide
CaCl2 + 2NaOH ----> 2NaCl + Ca(OH)2
Atoms with a high electronegativity, like oxygen have a strong attractive force
for electrons because
A. they have only a few valence electrons and need a total of eight to
fulfill the octet rule
O B. they're trying to share electrons with other elements of high
electronegativity
O C. opposites attract
O D. they re close to filling their outer shell, fuffilling the octet rule
Answer:
D. they're close to filling their outer shell, fulfilling the octet rule
Explanation:
:)
Which of the following atoms has the largest atomic radius? Provide an explanation
a Hydrogen
b. Sodium
C Lithium
d Rubidium
Answer:
d Rubidium
Explanation:
The atomic radius of an atom is the distance from the center of the nucleus to its outermost electron.
The atomic radius of elements varies in the periodic table, it increases as you go down in a group and decreases along the period from left to right.
All the elements listed: Hydrogen, Sodium, Lithium and Rubidium belong to the same group in the periodic table (group 1), Since atomic radius increases from top to bottom in a group, Rubidium has the largest atomic radius.
The government described in the passage most reflects the features of which type of democracy? No
The correct answer is B. Direct democracy
Explanation:
In a direct democracy, the citizens have a direct influence on government including laws, this means political decisions are made based on the opinion of citizens. This form of government differs from indirect democracy because in indirect democracy citizens only vote to choose representatives but do not participate directly in each political decision. The example presented is an example of direct democracy because even if some are not considered citizens, those who have the quality of "citizens" directly participate in the political decisions.
When there is unequal sharing between two atoms of the electrons in a bond, which
type of bond is it?
Answer:
polar covalent bond
Explanation:
In a reaction, 25 grams of reactant
AB breaks down into 10 grams of
product A and an unknown amount
of product B. Using the law of conservation of mass, how much does product B weigh?
a. 25 g
B. 10 g
С. It cannot be determined from the given
information.
d
D. 15g
Answer:
D. 15g
Explanation:
The law of conservation of mass states that, in a chemical reaction, mass can neither be created nor destroyed. This means that the amount of matter in the elements of the reactants must be equal to the amount in the resulting products.
In this question, 25 grams of a reactant AB, was broken down in a reaction to produce 10 grams of products A and X grams of product B. According to the law of conservation of mass, the mass of the reactant must be equal to the total mass of the products. This means that 25 grams must also be the total mass of both products in this reaction. Hence, if product A is 10 grams, product B will be 25 grams - 10 grams = 15 grams.
Therefore, product B must be 15 grams in order to form a total of 25 grams when added to the mass of product A. This will equate the mass of the reactant AB and fulfill the law of conservation of mass.
Which structural formula represents an isomer?
Answer: 4
Explanation: same amt of Hs Cs and Cls
The Option 4 has same number of atoms but arranged differently so it is the isomer of the given compound.
What is an Isomer ?Isomers are compounds that contain exactly the same number of atoms, i.e., they have exactly the same empirical formula, but differ from each other by the way in which the atoms are arranged.
By the definition of Isomer we can understand that we have to look for a compound that has same number of Carbon , Hydrogen and Chlorine atoms as that given .
Number of Carbon atoms = 3
Number of Hydrogen atoms = 6
Number of Chlorine atoms = 2
It can be seen that there are same number of Carbon , Hydrogen and Chlorine atoms in the fourth option , so Option 4 is the correct answer.
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Questions
Warm air rising in the atmosphere is an example of heat being transferred by
o absorption
O conduction
O convection
O radiation
Answer:
the answer is convection
convection
9. What is the difference between physical weathering and chemical weathering?
Answer: Physical Weathering physically breaks the rock, while Chemical Weathering chemically changes the rock causing it to break.
Explanation: Physical Weathering happens naturally causing the rock to break. An example is roots growing into the concrete causing it to crack. Chemical Weathering on the other hand chemically changes the rock by a chemical reaction. An example is acid rain. Gas or other pollution mixing in with water causing acid rain.
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An element and an atom are different but related because
a) A particular element is made up of many different types of atoms b) A molecule is the same as an atom
c) An element is made up of all the same type of atom
d) An element is smaller than an atom
Answer:
c) An element is made up of all the same type of atom
Explanation:
Atoms are the smallest unit of an element that consists of protons, electrons and neutrons in its structure. An element is the smallest part of a chemical substance that cannot be disintegrated i.e. it cannot be broken down further.
Atoms and elements are different in many ways but they are connected in the sense that an element contains only one type of atoms. For example, aluminum element is made up of only aluminum atoms. Different atoms form a molecule but same atoms form an element.
The difference of the element and iron should be option c) An element is made up of all the same type of atom.
What are atoms and elements?The atom represents the smallest unit that comprises of protons, electrons, etc.
While on the other hand, the element represents the small part of the chemical substance that should not be disintegrated. Also, it cannot be split. They both should be interlinked.
Therefore, the option c is correct.
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A molecule is what ?
Answer:
Explanation:
A group of atoms bonded together and the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. They are made up of atoms that are held together by chemical bonds. These bonds exchange electrons among atoms.
A molecule is just a group of two or more atoms bunched together.
Why does common table salt (NaCl) have a high melting point?
A.
It forms an ionic bond with a crystal lattice structure.
B.
It forms a covalent bond with a Lewis dot structure.
C.
It forms a metallic bond with an electron sea model structure.
D.
It forms a covalent bond by sharing electrons.
E.
It forms a metallic bond with a Lewis dot structure.
Answer:C is not the answer. I just got it wrong in Edmentum
Explanation:
physical science 6.06 part one
Answer:2 for 5, 6 for7
Explanation:
How much quantity in mL of concentrated 12 M hcl (aq) is needed to prepare a 250mL of 0.5 M hcl solution?
Answer:
10.41 mL of concentrated 12 M HCl (aq) is needed to prepare a 250mL of 0.5 M HCl solution
Explanation:
Dilution is the procedure to prepare a less concentrated solution from a more concentrated one. The amount of solute does not vary, but the volume of the solvent varies. More solvent is added and the concentration of the solute decreases, as the volume of the solution increases.
In this case it is fulfilled:
Vi * Ci = Vf * Cf
Vi = initial volume
Ci = initial concentration
Vf = final volume
Cf = final concentration
Being:
Vi=?Ci= 12 MVf= 250 mL= 0.250 L (being 1 L= 1000 mL)Cf= 0.5 MReplacing:
Vi*12 M= 0.250 L* 0.5 M
Solving:
[tex]Vi=\frac{0.250 L*0.5 M}{12 M}[/tex]
Vi= 0.01041 L= 10.41 mL
10.41 mL of concentrated 12 M HCl (aq) is needed to prepare a 250mL of 0.5 M HCl solution
What is the converse of the conditional statement?
Ifx is even, then x + 1 is odd.
If x is not even, then x + 1 is not odd.
Ifx + 1 is odd, then x is even.
Ifx + 1 is not odd, then x is not even
Ifx is even, then x + 1 is not odd.
Answer:
Conversing the conditional statement is nothing but switching the hypothesis and conclusion. Therefore, the converse of the given conditional statement will be “If x is odd, then x+1 is even.
Explanation:
The converse of the conditional statement is if x is odd, then x+1 is even.
What is conditional statement?A conditional statement is defined as a specific kind of compound sentence that meets the "if...then" requirement. If the hypothesis is correct but the conclusion is untrue, a conditional statement is false. Programming language elements called conditional statements, expressions, or simply conditionals instruct the computer to take specific actions.
Reversing the two statements that make up a categorical or implicational statement yields its opposite. Carry on a discussion is more properly referred to as "converse." Let's say there is a conditional statement of the form "If p then q." If q, then p is the converse. In a symbolic sense, q p is the opposite of p q. The reverse of a conditional assertion is not logically comparable.
Thus, the converse of the conditional statement is if x is odd, then x+1 is even.
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What happens to the motion of the atoms in a spoon after is placed in hot soup?
Answer:
they move faster
Explanation:
Answer:
They move faster.
Name three group l bases and three group ll bases
Answer:
Group 1: LiOH, NaOH, KOH
Group 2: Ca(OH)2, Sr(OH)2, Ba(OH)2
Explanation:
Will Mark Brainly thing please help
Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.
CO + O ₂ → CO ₂
Answer:
2CO + O ₂ → 2CO ₂
Explanation:
CO + O ₂ → CO ₂
Left Side
C = 1
O = 3
Right Side
C = 1
O = 2
So we'll balance the oxygen first
2CO + O ₂ → 2CO ₂
Left Side
C = 2
O = 4
Right Side
C = 2
O = 4
Ok so balancing the O has also balanced the C
1. What is the wavelength of a photon of light with a frequency of 6.10 x 10^15 Hz?
Answer:
0.000000000000005 mm
Explanation:
hi:) why do acids produce hydrogen ions in aqueous solution?
Answer:
An acid produces hydrogen ions in aqueous solution because it reacts with the water molecules by giving a proton to them.
Explanation:
When hydrogen chloride gas dissolves in water to produce hydrochloric acid, the hydrogen chloride molecule gives a proton (a hydrogen ion) to a water molecule.
Answer:
Acids produce hydrogen ions in aqueous solution because they have a higher concentration of hydrogen ions than hydroxyl ions and that's the reason too why they have a lower pH.
Hope this helps.
At what temperature does the solid start meltin
-20°C
0°C
20"
80°C
Answer:
0 C.
Explanation:
What is the potential energy of the bowling ball as it sits on top of a building?
Answer:
Potential energy is the amount of energy calculated from an object's height off the ground.
Explanation:
Potential energy = Mass x Height x Gravity
Which image shows a nonrenewable resource?
Answer: The orange can shall be your answer.
4. What is the name of A13+?
A)Aluminum ion
B)Aluminum
C)Aluminous ion
D)Aluminide ion
Answer:
Aluminum ion
Explanation:
I used Google tbh but it has a higher charge then a regular Aluminum atom
The best method to improve air quality is to
A. use technology to reduce the pollutants in air
b. produce less pollution
c. produce less pollution and use technology to reduce the pollutants in air
d. better utilize land and technology to prevent pollution
Please select the best answer from the choices provided
Answer:
A produce less polution
Explanation:
Answer:
C) produce less pollution and use technology to reduce the pollutants in air
Explanation:
EDG2020
