The different ways that atoms combine with each other help us identify different types of Compound
How does a hypothesis differ from a scientific theory? (1 point)
O Hypotheses can change with new evidence, but theories remain constant.
O Theories always lead to the development of new scientific ideas.
o Hypotheses are testable, while theories only exist conditionally.
o Theories are well established with lots of evidence to support their claims.
Answer:
the answer is actually D. (theories are well established with lots of evidence to support their claims)
Explanation:
i just took the quiz
A hypothesis is a presented reason for a phenomenon based on limited proof and evidence. A scientific theory is an elucidation of an element that has been constantly experimented with and confirmed per scientific approach.
Theories are well established with lots of proof to back their assertions.
What is the difference between the theory and hypothesis?Scientific theories are established based on the evidence and repetitive experimental procedures to prove and establish them correctly.Theories can change over time as new supporting evidence are found or new procedures are established to amend the old theory.A scientific theory recapitulates a hypothesis that has been reinforced with repeated experiments and observations.A hypothesis should be an instinctive justification or the potential correlation that lies between several phenomena and depends on the scientific theory.Therefore, option D is correct.
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6. How many meters are in 0.00253 kilometers?
Answer:
2.53 kilometers
Molecules, which have the same chemical formula and bond connectivity but different relative arrangement in three- dimensional space is called
(a) Enantiomers
(b) Stereoisomers
(c) Diastereomers
(d) Constitutional isomers
Answer:
B
Explanation:
Stereoisomers have the same connectivity in their atoms but a different arrangement in three-dimensional space. There are different classifications of stereoisomers depending on how the arrangements differ from one another. Notice that in the structural isomers, there was some difference in the connection of atoms. For example, 1-butene has a double bond followed by two single bonds while 2-butene has a single bond, then a double bond, then a single bond. A stereoisomer will have the same connectivity among all atoms in the molecule.
EASY QUESTIONS Need answers for both questions
Answer: I can’t really see the question sorry it’s to blurry
Someone help answer this
it is water energy :) this is easy
Answer: Heat
Explanation:
Also considered as thermal energy. So when the person dives in water their heat temperature balances out.
Why would an atom emit particles or waves from its nucleus?
A. None of these
B. If it has been part of a single replacement reaction.
C. If it has been part of a double replacement reaction.
D. To create a more stable nucleus.
An atom emits particles or waves from its nucleus to create a more stable nucleus. The correct option is D.
What is an atom?An atom is a divisible substance that contains subatomic particles like electrons, protons, and neutrons. The atoms are the smallest unit of matter that made every element. The atom also contains a nucleus, the electrons revolve around the nucleus.
An atom is full of electrons, and when an atom emits energy when an electron changes its level and moves near to the nucleus.
An atom emits a wave or particle to become more stable than before because it lowers its energy. More energy leads to the instability of the atom.
Thus, the correct option is D. To create a more stable nucleus.
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If the sum of the last
number and the middle
number of three consecutive
integersis is 71, then the
Least (smallest) number
mumber must be
Answer:
number must be 0000.999
chloramphenicol belongs to the group of:
1.alkaloids
2.antibiotics
3.vitamins
4.esters
Cells contain parts known as organelles these parts are specialized. What does this mean?
Answer:
because they devlop our organs
Potassium is a(n)____ metal than zinc
A more active
B less active
C equally active
D heavier
Answer:
Potassium is a more reactive metal than zinc
PLEASE MARK ME BRAINLIESTPotassium and zinc both are chemical elements, where Potassium is a more active metal than zinc. The correct option is A
What are potassium and zinc?
Potassium and zinc both are chemical elements. Potassium is metal and its symbol is K and its atomic number is 19. Its s silver-colored metal. Zinc is a slightly brittle metal and its symbol is Zn and its atomic number is 30.
Potassium is present in food materials, and it is a soft and necessary micronutrient for the body. Zinc is also a micronutrient that is needed in a small amount for the body.
Potassium is an alkali metal and zinc is a transition metal and is present in the center of the periodic table. Alkali metals (potassium) are more reactive than transition metals.
Thus, the correct option is A more active.
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If 2.0 g of hydrogen gas combines with an excess of chlorine gas to form 72.9 g of hydrogen chloride, what mass of chlorine is used in the reaction?
Explanation:
Eqn of Reaction
H2 + Cl2 == 2HCl
Mass of HCl=72.9g
Mass of H2 = 2.0g.
Moles of HCl = Mass/Molar Mass
n = 72.9/36.5
n=1.997 moles of HCl was produced.
Now from the balanced eqn of reaction...
2moles of HCl is produced when 1moles of Cl2 reacts.
So
1.997moles of HCl would produce.....
1.997 x 1/2 moles of Cl2
0.999moles of Cl2 is gotten.
n(Cl₂) = mass/Mm
Mass = Mm x n
n=0.999moles
Molar Mass(Mm)= 35.5 x 2= 71g/mol ( You multiply by 2 cuz Chlorine is a diatomic gas).
Mass = 0.999 x 71
Mass = 70.929g of Chlorine.
An easier and swifter way to look at this is
From the Law of Conservation Of Mass.
The Mass of reactants MUST equal those of products in a simple chemical reaction since Matter is neither created nor destroyed in this scenario.
So The product Was 72.9g of HCl
Therefore
The Sum of both reactants Must equal this value.
We're already given the value of H₂ =2g
Therefore...
Chlorine should be undoubtedly 70.9g.
Hope this helps.
Have a great a day Amigo✅
Please help me please find the answer
I have already answered this question once. Anyways please let me know whether it is useful or not
Find the mass of an object with 30 cm3 and has a density of 2 g/cm3 (input number only)
formation of a precipitate
formation of gas (without heat)
color change
Answer: 60 g
Explanation: Mass is the product of density and volume.
Density (2 g/cm^3)
Volume (30 cm^3)
(2 g/cm^3)*(30 cm^3) = 60 g
Which of the following symbolic representations of matter signifies a mixture of elements?
A 28.98 g piece of gold is put in a 10-mL graduated cylinder, and the water rises 1.50mL.
a. What is the density of gold?
b. You know the density of silver is 10.5 g/mL. What mass of silver would cause the water to rise 1.50mL?
Answer:
a. 19.32 g/mL
b. 15.75 heres the answers
What structural feature of the vanilloid compounds is responsible for their very different flavors?
The structural feature responsible for the different flavors of vanilloids is the presence of the vanillyl function group such that they are able to bind with transient receptor type 1 (TRPV1) channels and act as an agonist
Reason:
Vanilloid compounds include acetovanilon, capsaicin, vanillylmandelic acid,
homovanillic acid. The vanillyl group is functional group of the vanilloids.
The flavor of spicy peppers such as the sensation of burning is due to
binding to the transient receptor type 1 (TRPV1) receptor which is an a
channel that give a response to acid, and high temperature stimuli, by
vanilloid compound such as capsaicin, ovanil, and resiniferatoxin
The agonists of TRPV1 such as resiniferatoxin and capsaicin have the
vanilloid ring. Capsaicin has a long highly lipophilic, aliphatic chain such
that it binds in the intracellular locations to TM3 and TM4 of the TRPV1
channel TM3 and TM4
Therefore, the special feature of the vanilloid compounds that is
responsible for their different flavors, is the presence of the functional the
vanilloid ring and the ability to bind with to the TRPV1 acting as an agonist
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what is the chemical equation of combustion of coconut oil
Answer:
2 C6H14 + 19 O2 -> 12 CO2 + 14 H2O.
Explanation:
'.'
A rabbit has a mass of 2kg. What is its weight
Answer:
weight = Mass × gravity
P= m × g
P=mg
Weight (P) = ? , Mass (m) = 2 kg , gravity (g) = 9.8 m/s²
P= mg
p = 2 × 9.8
P= 19.6 kg.m/s²
P= 19.6 N
I hope I helped you^_^
What is the mole ratio of NH3 to N2?
answers : the mole ratio between NH3 : NH2 is 2:1
'Wetness' is actually a description of water's stickiness. This stickiness
comes from two properties:
and
A. high specific heat capacity and density
OB. None of these
C. ability to be a universal solvent and high latent heat of fusion
D. adhesion and cohesion
Reset Selection
Answer:
D. adhesion and cohesion
Which of the following contains only one
type of atom?
A. element
B. solution
C. compound
Answer:
A. elements
I hope it's helps you
Answer:
A i think
Explanation:
what is the shape of sf6
Answer:
answer........of the question
1-How does the Law of Conservation of Energy explain why ice cubes melt in water?
2-What are the two differences between mass and weight?
3-Why does an object’s weight change on the moon but its mass stays the same?
4-Explain how two objects that have the same mass can have different densities.
5-How can you tell if a mixture is homogeneous (solution) or heterogeneous (not a solution)?
6-Identify each of the following examples below as either a homogeneous mixture (solution) or a heterogeneous mixture.
7-What are 3 methods you can use to separate a mixture? Give an example of each.
8-What is the difference between an atom and a molecule?
9-Is a compound a mixture or a pure substance?
10-How are elements arranged on the Periodic Table? by increasing
atomic number.
Answer: 1.The water molecules in the liquid phase have more energy than the molecules in the solid phase. The reason that the ice melts is that some of the energy in the water is transferred to the ice – this provides the heat necessary for the transition from the solid to liquid phase
PLEASE, QUICKLY!!!!!!!!!
Which statement correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant?
A. The relationship is directly proportional; as temperature increases, volume decreases in the same way.
B. The relationship in inversely proportional; as temperature increases, volume increases in the same way.
C. The relationship is inversely proportional; as temperature increases, volume decreases in the same way.
D. The relationship is directly proportional; as temperature increases, volume increases in the same way.
The statement that correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant is "he relationship is directly proportional; as temperature increases, volume increases in the same way."
In mathematics, a direct proportion means that the two variables increase or decrease simultaneously. As one increases the other increases and vice versa.
According to Charles law; the volume of a given mass of gas is directly proportional to its volume at constant pressure.
As a result of this law, the correct statement is option D; The relationship is directly proportional; as temperature increases, volume increases in the same way.
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The state of matter in which a material has a definite shape and a definite volume is the _____ state.
liquid
elemental
solid
gas
Answer:
solid
Explanation:
in the solid state the material will has a fixed shape and volume whatever the container that contains it
where in liquid the shape will be different depending on the container
and in gas state the shape and volume are not definite
Arrange the ions from largest to smallest.
Se^2-, Sr^2+, As^3-, Br^-, Rb^+
Answer:
As^3-, Se^2-, Br^-, Rb^+, Sr^2+
Explanation:
aplicando a lei das proporcoes definidas,calcule a massa do elemento sodio existente em 10 g de sulfato de sodio
Answer:
3.24
Explanation:
em primeiro lugar, você calcula o peso molecular de cada elemento e o multiplica pelo seu número, portanto, se for Na2So4, então multiplicaremos o peso molecular do sódio, que é 23, por 2 e assim por diante. então você terá as proporções de sódio para enxofre para o total, que será de 142. então por multiplicação cruzada definirá o total para 10 e, em seguida, multiplique-o por Na que foi de 46, em seguida, divida-o pelo total que é 142 e então dá a você o sódio em 10 gramas de Na2SO4, que é 3,24.
MULTIPLE CHOICE QUESTION
If there are 5280ft in 1 mile, 12 inches in ift, and
2.54 cm in 1 inch, what is 2.3 miles in cm?
0.0011 cm
370,149.12 cm
370,149.12 centimeters
Which term is defined as anything that has mass and occupies space
Answer:
Matter is defined as anything that has mass and occupies space.
Answer:
Matter is anything that has mass and takes up space
Explanation:
The volume of an object is the amount of space it occupies.
Which of the following atoms would be an ion?
O A. An atom with 8 protons and 8 neutrons.
OB. An atom with 5 protons and 5 electrons.
C. An atom with 11 protons and 9 electrons.
D. None of these
Reset Selection
Answer:
[tex]because \: e = p \\ but \: e < p \\ therefore \: (c) \: is \: the \: right \: answer[/tex]
