Answer:
En total son 8 modelos, en la explicación los nombraremos por orden de antigüedad.
Explanation:
Modelo atómico de Demócrito (450 a.C.)
Modelo atómico de Dalton (1803 d.C.)
Modelo atómico de Lewis (1902 d.C.)
Modelo atómico de Thomson (1904 d.C.)
Modelo atómico de Rutherford (1911 d.C.)
Modelo atómico de Bohr (1913 d.C.)
Modelo atómico de Sommerfeld (1916 d.C.)
Modelo atómico de Schrödinger (1926 d.C.)
Need the answer ASAP!!!
Select the correct answer.
A student puts a glass of water in the freezer. Later, he notices ice forming on the surface of the water. Which property of water best explains
why ice forms on its surface?
OA
Ice has more surface tension than liquid water,
OB.
Ice is less dense than liquid water.
OC.
Ice has a lower freezing point than liquid water.
OD
Ice is more cohesive than liquid water.
O E.
Ice can dissolve more oxygen than liquid water.
Answer:
The Ice is Less Dense than the Water
Explanation:
I just answered this one myself, and the explanation is also just that Ice isn't dense enough to sink.
Given the reaction:
Ca + 2H,0→ Ca(OH)) + H2
How many moles of H,O are needed to exactly react with
2.0 moles of Ca
Answer:
4
Explanation:
because use the molar ratio of
ca:h2o
1:2
2;4
so u times it by 2 .
hope this helps:)
PLEASE HELP!!!
What are the products of a hydrogen fusion reaction?
A. Deuterium
B. Carbon-14
C. Plutonium and a neutron
D. Helium and a neutron
Answer:
b
Explanation:
Deuterium is the products of a hydrogen fusion reaction, the correct option is A.
What is hydrogen fusion?It is the situation in which two hydrogen atoms merge or coalesce to form a helium atom.
A portion of the hydrogen's mass is transformed into energy during the process.
The fusion reaction that abilities the Sun and stars occurs when hydrogen atoms merge to produce deuterium, and then deuterium and hydrogen atoms fuse to form helium, releasing energy.
Four Hydrogen nuclei (protons) combine to form a Helium nucleus in the basic Hydrogen fusion cycle.
Actually, electrons, neutrinos, and photons are involved in the hydrogen fusion into helium.
Since the total mass of the eventually results single nucleus is lower than the mass of the original two nuclei, the process releases energy.
Thus, the correct option for the given case is A.
For more details regarding hydrogen fusion reaction, visit:
https://brainly.com/question/12665881
#SPJ2
hyy guys.... can you plz writ me a journal plz ..... connection with science... any topic will be done today is my submition
ur best try is to copy and paste and change some words.
another name for constant boiling mixture
Answer:
Azeotrope
Explanation:
An azeotrope is a liquid mixture that has a constant boiling point and whose vapor has the same composition as the liquid
Another name for constant boiling mixture.
[tex]\sf\purple{Azeotrope.}[/tex] ✅
An azeotrope or a constant boiling point mixture is a mixture that has the same composition in liquid and vapour phase.[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]
chemistry help best answer gets marked brainly
Answer:
C. The final substance in beaker A is a pure substance while in Beaker B is a mixture
Explanation:
A pure substance is a substance that contains a constant and definite proportion of a single substance. Elements and compounds are the two known pure substances while mixtures are substances of different compositions mixed together.
In this question, two beakers; A and B are said to contain different substances. Beaker A contains elemental sulfur (S) that forms a yellow powder while beaker B contains sand and water. From the explanation above, the final substance in beaker A is a pure substance (element) while in beaker B is a mixture of sand and water.
Where can we find what the chemical symbols in a compound mean? Example: 0, C, Na, Li
Answer:
The periodic table
Explanation:
I'm not really sure what your question is. . . I'm assuming this is what you're looking for
Plz help it’s due very soon
Answer:
192g
Explanation:
so for this find out there moles of CH4 by moles=mass/mr
48/16=3 then use molar ratio 1:2 so times it by 2 which is 6 moles. then uses mass =moles*mr so 6*32=192g is the answer hope this helps to understand.
Answer:
64
Explanation:
Which equation represents natural transmutation?
A)238920 +23490Th + 42He
490Th
B)UFO + 6 Na →6 NaF + U
C) 2713A1 + 42He3015P+ lon
D) H2O + H+ + OH-
Answer:
answer is a
Explanation:
i hope this helps you
list three common examples of solute
Answer:
sugar, salt, oxygen
Explanation:
hope these work
Answer:
Examples of solutes include sugar, salt, oxygen, etc. There are numerous examples of solutions. For example, milk (solvent) and sugar (solute) make sweet milk. Air is made up of gases (oxygen, nitrogen, carbon dioxide, etc.).
Explanation:
GIVE BRAINLIEST
Which property of water helps it maintain a relatively stable temperature?
The property of water that helps it maintain a relatively stable temperature is the presence of hydrogen bonds.
The properties of waterWater is an odourless, tasteless and colourless compound that is made up of hydrogen and oxygen atoms.
The properties of water include the following:
it is a polar solvent,it has high specific heat capacityHigh surface tension, andStable boiling and freezing points.The stable temperature of water, that is the ability to have a constant boiling and freezing points, is as a result of the hydrogen bonds existing between the water molecules.
The hydrogen bonds gives water molecules ability to hold heat better than any other substance.
Learn more about water properties here:
https://brainly.com/question/18681949
Answer: High specific heat capacity
Explanation:
I took the test
the total energy gain of the ice cube and the resulting liquid water is blank joules
Answer:
bro
Explanation:
bro
Answer: yes
Explanation:
Because of the mass
How many total atoms are there in 60.3 g of carbon monoxide (CO)?
total atoms:
atoms
Explanation:
moles = mass/mr
=60.3/28
=2.15 moles
number of particles = moles × 6.02×10^23
= 2.15×6.02×10^23
= 1.29×10^24 atoms
CO=12+16=28
Help a girl out, please!!!!!
Answer:
The answer will be Number C that is positively and part of the nucleus
Answer:
Part C best describes a proton, as it is positively charged and part on the nucleus
I para realizar un receta casera de bizcocho se necesitan 100 gramos de azúcar, calcula los moles a los que equivale y el número de moléculas de sacarosa.
The complete question is as follows: I want to make a homemade cake recipe you need 100 grams of sugar, calculate the moles to which it is equivalent and the number of molecules of sucrose.
Answer: In 100 grams of sugar there are 0.292 moles and the number of molecules of sucrose are [tex]1.76 \times 10^{23}[/tex].
Explanation:
Given: Mass = 100 g
Molar mass of sugar = 342.3 g/mol
As number of moles is the mass of substance divided by its molar mass.
Hence, moles of sucrose are calculated as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{100 g}{342.3 g/mol}\\= 0.292 mol[/tex]
According to mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{23}[/tex] molecules.
Hence, the number of molecules present in 0.292 mol are calculated as follows.
[tex]0.292 mol \times 6.022 \times 10^{23}\\= 1.76 \times 10^{23}[/tex]
Thus, we can conclude that in 100 grams of sugar there are 0.292 moles and the number of molecules of sucrose are [tex]1.76 \times 10^{23}[/tex].
Ethanol has a heat capacity of 2.46 Jig 'c. If 50 g of ethanol has a temperature of 30°C and a piece of hot Copper is added to the ethanol causing the
temperature to increase to 70°C. What is the amount of heat absorbed by the ethanol?
Explanation:
there it is fella tried on ma own consciousness
Complete the symbol equation for the preparation of sodium sulfate
2NaOH(aq) + H2SO4(aq) => Na2SO4(s) + 2H2O(l)
This is a neutralization reaction.
If I have 0.294L of a 2.OM NaOH solution, what will be the concentration if I add 1.824L to the solution?
Answer:
0.32M
Explanation:
Using the following formula;
CaVa = CbVb
Where;
Ca = concentration of acid (M)
Cb = concentration of bass (M)
Va = volume of acid (HCl)
Vb = volume of base (NaOH)
According to this question, the following were given:
Ca = ?
Cb = 2M
Va = 1.824L
Vb = 0.294L
Using CaVa = CbVb
Ca × 1.824 = 0.294 × 2
1.824Ca = 0.588
Ca = 0.588 ÷ 1.824
Ca = 0.32M
30. Which two notations represent atoms that are isotopes of the same
element?
A) 31 Sn and 30°Sn
B) 581 Sn and 13 Sn
C) 3°O and LOF
D) 19 Cl and 18K
Answer: 581 Sn and 13 Sn
Explanation:
581 Sn and 13 Sn are both Sn which are the same element with different masses. Isotopes are same element with different masses and the elements can have different masses because of different number of neurons
The aximuthal quantum number of an orbital is 3. What are the possible values of m?
For a given valye of l(l shell), values of m are from -l to 0 to l, so m could be; -3, -2, -1, 0, +1, +2, +3.
Easyy!
the value of m is equal to 2l+1 so there must beseven values for m.
m can have values from -l through zero to +l so the values are -3, -2, -1, 0, +1, +2 and +3.
¿Cual es la sustancia que puede causar la muerte? (Estoy poniendo cualquier cosa para registrarme) 3
Answer:
Veneno.
Explicación:
El veneno es la sustancia que puede causar la muerte porque el veneno destruye las células que entran en contacto con el veneno. Si el veneno causa menos daño por lo que no ocurre la muerte del paciente mientras que por otro lado, si el veneno entra en contacto con los órganos vitales y causa más destrucción, el paciente eventualmente morirá, por lo que podemos decir que las sustancias tóxicas y venenosas causan daño y muerte. de la gente.
Match the parts of the nervous system with their functions.
cerebrum
brain stem
cerebellum
meninges
regulating breathing
memorizing a telephone number
dancing
protecting the central nervous system
The volume of a gas at 5.00 ATM is 3.5 L what is the volume of the gas at 7.00 ATM at the same temperature
A- 2.5 L
B- 5.0 L
C- 10. L
D- 12 L
Answer:
B) 5.0L
Explanation:
Like the Ford F-150 V8 Cyote 5.0L engine
The sun revolved around the earth why ? help me
Answer:
You are moving because the Earth and everything in our solar system is constantly moving. ... As the Earth rotates, it also moves, or revolves, around the Sun. The Earth's path around the Sun is called its orbit. It takes the Earth one year, or 365 1/4 days, to completely orbit the Sun.
Answer:
um lol i think you mean Why does the earth revolve around the sun
its because the that the gravity of the Sun keeps the earth in its orbit
Explanation:
hope this helps!
CO(g) + 3 H2(g) → CH4(k) + H2O(g) + heat
The sign of AH is
The sign of AS is
The sign of AG is negative a low or high temperature?
Explanation:
AH is negative because the reaction gives out heat (exothermic).
AS is negative because the total entropy of the reactants is greater than that of the products (there are 4 moles of gas on reactant side compared to only 1 mole on the product side). Thus, the reactants are said to be "messier" than the products.
AG is negative at lower temperatures because at low temperatures, -TAS is more negative, resulting in the negative sign of AG.
Hope this helps.
What value is closest to the mass of the atom ?
Answer:
mass number
Explanation:
Answer and Explanation: The value closest to the mass of an atom is its mass number. The mass number is the total count of the protons and neutrons in the nucleus of the...
mass number
hope that helped
what is a molecular formula ?
Answer:
a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.
Answer ; try to understand in the explanation
Explanation: Molecular Formula Definition: An expression which states the number and type of atoms present in a molecule of a substance. Examples: There are 6 C atoms and 14 H atoms in a hexane molecule, which has a molecular formula of C6H14.
number 2 pls help me :):)
Answer:None of the tunes make a correct statement the third choice is closed but may still dating the pencil operates broken because the light been to a zoo from a straight line when it across the boundary between air and water
Explanation:
Which diagram shows a pair of electrons that have opposite spins?
O1
1
个个
Answer:
the answer is half arrow
What is the molarity of a solution of 58.7 grams of MgCl2 in 359 ml of solution?
Answer:
1.72 M
Explanation:
Molarity is the molar concentration of a solution. It can be calculated using the formula a follows:
Molarity = number of moles (n? ÷ volume (V)
According to the information provided in this question, the solution has 58.7 grams of MgCl2 in 359 ml of solution.
Using mole = mass/molar mass
Molar mass of MgCl2 = 24 + 35.5(2)
= 24 + 71
= 95g/mol
mole = 58.7g ÷ 95g/mol
mole = 0.618mol
Volume of solution = 359ml = 359/1000 = 0.359L
Molarity = 0.618mol ÷ 0.359L
Molarity = 1.72 M
