Answer:
What I think it is it's.. 3?
Why study science?
Lmk ASAP
HELP PLEASE I DONT KNOW WHAT THIS MEANS IM CONFUSED
Explanation:
In an alpha emission, an alpha particle is ejected from a large nucleus. An alpha particle is simply a helium nucleus (atomic number is 2 and mass number is 4) so that means that the atomic number of the emitting nucleus decreases by 2 and its mass number decreases by 4.
organs are directly made up of what lower level of cellular organization
Answer:
hwejfhwefefewf
Explanation:
efwffhhfghr
How many liters of F2 do you have if you are given 100 grams of F2?
Which of the following is a correct statement about water? (3 points)
Hydrogen bonding causes water to be strongly cohesive.
Hydrogen bonding causes water to have a low surface tension.
Water is a universal solvent because polar and nonpolar solutes can dissolve in it.
Water is less dense as a liquid than as a solid because of changes in bond structure.
Answer:
A: Hydrogen bonding causes water to be strongly cohesive.
Explanation:
Water has a high surafce tension. Hence droplets of water
Water cannot dissolve non polar substances like oil; only polar
Water is actually less dense in solid form :)
Hydrogen bonding causes water to be strongly cohesive.
This sticking together of like substances is called cohesion. Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.
Cohesion
Cohesion, also called cohesive attraction or cohesive force, is the action or property of like molecules sticking together, being mutually attractive. It is an intrinsic property of a substance that is caused by the shape and structure of its molecules, which makes the distribution of surrounding electrons irregular when molecules get close to one another, creating an electrical attraction that can maintain a microscopic structure such as a water drop. In other words, cohesion allows for surface tension, creating a "solid-like" state upon which light-weight or low-density materials can be placed.
Learn more about Cohesion
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what is ionic compounds??
Answer:
The ionic compounds are chemical compounds composed of ions, which is held together by electrostatic forces termed ionic bonding.
a dry cell produces_______ electricity.
A) static
B) current
Answer:
dude! it's static!
Explanation:
a dry cell can't function and is therefore static!
what is the variable for the quantity of heat in a system?
Answer:
The heat capacity is the amount of heat, expressed usually in Joules or calories, needed to change the system by 1 degree Celsius. The specific heat capacity is the amount of heat required to raise 1 gram of a substance by 1 degree Celsius.
Explanation:
For example, the specific heat of H2O(l) is 4.18 J/g ° C.
Which layer of the earth is the thinnest and thickest?
Answer:
crust
Discuss with the whole class what the relative thicknesses of the layers are — that the inner core and outer core together form the thickest layer of the Earth and that the crust is by far the thinnest layer.
Explanation:
Discuss with the whole class what the relative thicknesses of the layers are — that the inner core and outer core together form the thickest layer of the Earth and that the crust is by far the thinnest layer.
Study the particle below carefully and answer
the questions that followed.
a)ldentify the particle.
b)Write the electronic configuration of the
particle.
c)State
i.Atomic number
ii.Mass number
iii.Proton number
iv.Electron number
d) Calculate the neutron number
e) State the valency
f)What is the valence electrons?
Answer:
b is the answer hope that helps
What is a zirconium, in your own words but be more detailed.What is a zirconium, in your own words but be more detailed.
Answer:
Zirconium is a silver-gray transition metal, a type of element that is malleable and ductile and easily forms stable compounds. It is also highly resistant to corrosion. It is commonly used in corrosive environments. Zirconium alloys can be found in pipes, fittings, and heat exchangers, according to Chemicool.
Explanation:
Answer: Today this element is widely used, as zircon, as Zirconium oxide and as the metal itself. Zirconium is to be found in ceramics, foundry equipment, glass, chemicals, and metal alloys. Zircon sand is used for heat-resistant linings for furnaces, for giant ladles for molten metal, and to make foundry moulds.
Explanation: Hope it help I think
The rate of gas diffusion is ---Select--- proportional to temperature because a higher temperature means a/an increase in the kinetic energy of molecules. The rate of gas diffusion is ---Select--- proportional to the molecular weight of the gas because gas particles with higher masses require ---Select--- energy to move compared to gas particles with lower masses.
Answer:
The rate of gas diffusion is directly proportional to temperature
Explanation:
The rate of gas diffusion is
a) directly proportional to square root of temperature
b) inversely proportional to the square root of density
c) directly proportional to pressure
d) inversely proportional time and square root of molecular mass
Thus, option A is correct
Please help me I will give brainliest to the first correct answer
Answer:
OPTIC B) HEPT-HOPE IT IS HELPFUL
Is this an alpha or beta decay?
When 1 mol of methane is burned at constant pressure, −890 kJ/mol of energy is released as heat. If a 1.67 g sample of methane is burned at constant pressure, what will be the value of ∆H
Answer:
[tex]\Delta H=-92.7kJ[/tex]
Explanation:
Hello there!
In this case, according to the given information, we can infer that 890 kJ of energy are released when 1 mole of methane is burned; however, to find the total heat when 1.67 grams are burned, we first need to calculate the moles in this mass of methane:
[tex]1.67gCH_4*\frac{1molCH_4}{16.04gCH_4}=0.104molCH_4[/tex]
And thus, for calculating the resulting ∆H, we proceed as follows:
[tex]\Delta H=-890kJ/mol*0.104mol\\\\\Delta H=-92.7kJ[/tex]
Regards!
A student used the Dumas method to
determine the molar mass of a volatile
material. They placed the container into the
ice bath BEFORE all of the material was
vaporized. What will happen to their final
calculations?
A. The Molar Mass will be too low.
B. The Molar Mass will not be effected.
C. The Molar Mass will be too high.
Answer:
B. The molar Mass will not be effected
Explanation:
HIPE IT HELPS
Determine the mass of NaCl needed to create a 500. ml solution with a concentration of 1.50 M.
When a 0.860 g sample of an organic compound containing C, H, and O was burned completely in oxygen, 1.64 g of CO2 and 1.01 g of H2O were produced. What is the empirical formula of the compound?
Answer:
C₂H₆O
Explanation:
Empirical formula is the simplest ratio of atoms present in a molecule. To solve this question we must find the moles of C, H and O in order to find the simplest ratio of this atoms.
To solve this question we must find the moles of C from CO2, moles of H from H2O and moles of O from the difference of masses of C and H and the sample:
Moles C:
1.64g CO2 * (1mol / 44g) = 0.03727 moles CO2 * (1mol C / 1mol CO2) = 0.03727 moles C
0.03727 moles C * (12g / mol) = 0.4473g C
Moles H:
1.01g H2O * (1mol / 18g) = 0.05611 moles H2O * (2mol H / 1mol H2O) =
0.1122 moles H
0.1122 moles H * (1g / mol) = 0.1122g H
Moles O:
0.860g - 0.1122g H - 0.4473g C = 0.3005g O * (1mol / 16g) =
0.01878 moles O
The ratio of the moles of atoms regard to the moles of O (Lower number of moles) is:
C = 0.03727 moles C / 0.01878 moles O = 1.98 ≈ 2
H = 0.1122 moles H / 0.01878 moles O = 5.97 ≈ 6
O = 0.01878 moles O / 0.01878 moles O = 1
Empirical formula is:
C₂H₆OA Starting substance in a chemical reaction is called a _______________.
1. reactant
2. product
3. chemical reaction
4. physical reaction
Answer:
1.)REACTANT
These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.Please help me on this question
Increasing temperature makes a
reaction rate faster. Which of the
following best explains the above?
A. high-temperature meltdown
the reactants so it is easier to
react
O
B. High temperature increases
the number of high energy
collisions
C. reactants can evaporate
when they are heated up
D. Products favor higher
temperature reactants.
Answer:
High temperature increases the number of high energy collisions
Explanation:
Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.
hellppp i have a quiz please
hindi ko po maintindihan
17. A scientist determines an unknown metallic sample to have 77 protons and 77 electrons with a mass number of 192. How many neutrons does one
metal atom contain?
Answer:
Ok so hot u hahaha
Explanation:
Hshshhdhdi jsushshshshshhdhdhd hshshshshsh hdhdhdhd hdhdhdhd hdhdh
1 An
atom
has 20
number?
with 39
neutron
mass number
it's
atomic
yes it is atomic if the mass number is that high
Tipo de enlace en los compuestos. Compuesto /Electronegatividad Elemento 1/Electronegatividad Elemento 2/ Diferencia de electronegatividad (resta) Tipo de enlace CO2 KCl H2O
Answer:
Tipo de enlace enlace en CO2 - Covalente
Tipo de enlace enlace en KCl - iónico
Tipo de enlace enlace en H2O: enlaces covalentes y de hidrógeno
Electronegatividad de CO2 - Diferencia en electronegatividad de carbono (EN = 2.5) y oxígeno (EN = 3.5) = 3.5 - 2.5 = 1
Diferencia en electronegatividad de KCl = 3,2 -0,8 = 2,4
Diferencia en electronegatividad de H2O = 3.5 -2.1 = 1.4
Explanation:
Tipo de enlace enlace en CO2 - Covalente
Tipo de enlace enlace en KCl - iónico
Tipo de enlace enlace en H2O: enlaces covalentes y de hidrógeno
Electronegatividad de CO2 - Diferencia en electronegatividad de carbono (EN = 2.5) y oxígeno (EN = 3.5) = 3.5 - 2.5 = 1
Diferencia en electronegatividad de KCl = 3,2 -0,8 = 2,4
Diferencia en electronegatividad de H2O = 3.5 -2.1 = 1.4
The theory of plate tectonics is supported by data collected by scientists. One piece of data includes that earthquakes tend to occur*
a.along plate boundaries
b.along mountain ranges
c.along the banks of rivers
d.along the boundaries of glaciers
Answer:
is that a letter a
Explanation:
that is my answer
REALIZAR LA MASA MOLECULAR DE LOS SIGUIENTES COMPUESTOS HIDROXIDO DE MAGNESIO = Mg(OH)2 ACIDO CARBONICO = H2CO3 GLUCOSA= C6H12O6
Answer:
Mg(OH)2 = 58.321g/mol
H2CO3 = 62.026g/mol
C6H12O6 = 180.156g/mol
Explanation:
Para hallar la masa molecular debemos, primero, identificar las moles de cada átomo presentes en una mol de una molécula. Por ejemplo, para el hidróxido de magnesio:
Mg = 1mol
O = 2mol
H = 2mol
Ahora, debemos hacer la suma del peso molecular de todos estos átomos. Esto es:
Mg = 1mol * (24.305g/mol) = 24.305g/mol
O = 2mol * (16g/mol) = 32g/mol
H = 2mol* (1.008g/mol) = 2.016g/mol
El peso molecular del hidróxido de magnesio es:
24.305g/mol + 32g/mol + 2.016g/mol = 58.321g/mol
Ácido Carbónico:
H = 2mol * (1.008g/mol) = 2.016g/mol
C = 1mol * (12.01g/mol) = 12.01g/mol
O = 3mol * (16g/mol) = 48g/mol
Masa molar = 62.026g/mol
Glucosa:
C = 6mol * (12.01g/mol) = 72.06g/mol
H = 12mol * (1.008g/mol) = 12.096g/mol
O = 6mol * (16g/mol) = 96g/mol
Masa molar = 180.156g/mol
PLEASE ANSWER!!!!!!!!!!!!!
what physical and social systems are involved in the service industry
Answer:
Hey mate.....
Explanation:
This is ur answer........
For example, the communications industry includes all of the physical and social systems that produce books, newspapers, magazines, radio and television broadcasts, billboard advertisements, Internet websites, telephones, and telecommunications, such as the GPS.
Hope it helps!
Brainliest pls!
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how do valence electrons interact between non polar covalent, polar covalent, and ionic bonds?
Answer:
In non-polar covalent bonds, the electrons are equally shared between the two atoms. For atoms with differing electronegativity, the bond will be a polar covalent interaction, where the electrons will not be shared equally.
Explanation:
i did some reasherch so there^^