Answer:
Molecules are made of two or more atoms
Molecules are made of atoms of the same element or different elements.
Molecules range in size.
Explanation:
A molecule is formed whenever two or more atoms combine. Hence we can define a molecule as a combination of two or more elements that are combined chemically and can not be separated by any physical means.
Molecules may be composed of the same atoms as in O2, F2 etc or different atoms as in CO2, H2O, etc.
The sizes of molecules differ. Some molecules are quite small in size while others are quite large in size.
Answer:
Molecules are made of two or more atoms
Molecules range in size
Molecules are made of atoms of the same element or different elements.
what compound would form when magnesium and nitrogen combine
Answer:
magnesium nitride
Explanation:
If you have a 17% salt solution, how much salt will need to be added to 71 mL of water?
Salt added : 14.5 g
Further explanationGiven
17% salt solution
71 ml water
Required
salt needed
Solution
%mass = (mass solute : mass solution) x 100%
71 ml water = 71 g water(density = 1 g/ml)
mass solute = x
[tex]\tt 17\%=\dfrac{x}{x+71}\times 100\%\\\\0.17(x+71)=x\\\\0.17x+12.07=x\\\\0.83x=12.07\\\\x=14.5[/tex]
what is the formulaa for H2O
Answer:
:)
Explanation:
Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
Answer:
H2O
Explanation:
Thats the formula :P
What chemical bonds occur to get oxygen?
Explanation:
covalent bonds
Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell.
Jackson enjoys looking up at the night sky and writing about the variety of objects he see , on one special occasion he wrote in his journey that he saw a streak of light going across part of the sky . Which answer best describes what Jackson saw ?
a - Meteorite: A cold mixture of dust and ice that develops a long tail as it nears the sun
b - Meteor: A cold mixture of dust and ice that develops a long tail as it nears the sun
c - Meteorite: A streak of light made when an object burns up as it enters earth’s atmosphere
d - Meteor: A streak of light made when an object burns up as it enters earth’s atmosphere
Answer:
d - Meteor: A streak of light made when an object burns up as it enters earth’s atmosphere
Explanation:
The best description of what Jackson saw is a meteor which is a streak of light made when an object burns up as it enters earth's atmosphere.
A meteor is made up of rocky and sometime iron mass. They are believed to have formed since the early formation of the earth.
These objects moves with very high velocity in the solar system. When they enter the earth's atmosphere, they are burnt up and they leave a streak of light in the atmosphere. This is what is seen as a shooting starLimestone CaCo3 decomposes to lime according to the equation below
CaCo3 ----> CaO + CO2
(i) balance the equation above
(ii) what mass of limestone would produce 11.2 grams of lime?
Show your working
Answer:
Mass of lime produced = 19.0 g
Explanation:
Given data:
Mass of lime produced = 11.2 g
Mass of limestone react = ?
Solution:
Chemical equation:
CaCO₃ → CaO + CO₂
Balanced chemical equation:
CaCO₃ → CaO + CO₂
Number of moles of lime:
Number of moles = mass / molar mass
Molar mass of lime 56.1 g/mol
Number of moles = 11.2 g/ 56.1 g/mol
Number of moles = 0.19 mol
Now we will compare the moles of CaO and CaCO₃ from balance chemical equation.
CaO : CaCO₃
1 : 1
0.19 : 0.19
Mass of limestone react:
Mass = number of moles × molar mass
Mass = 0.19 mol × 100.1 g/mol
Mass = 19.0 g
Which element, Sulfur or Chlorine, would have the higher first ionization energy?
Answer:
Chlorine
Explanation:
Answer:
Chlorine
Explanation:
The first Ionization energy for sodium is one and one-half times larger than the electron affinity for Chlorine. Thus, it takes more energy to remove an electron from a neutral sodium atom than is given off when the electron is picked up by a neutral chlorins atom.
Which of the following is a unit of distance? JUst know im not dum nor slow.....just know.
min
miles/hr
hr
km
Answer:
km
Explanation:
Answer:
miles yryryeyeueheueueueueueyeyeyeyey
The internal combustion engine takes advantage of the ability of the combustion reaction of gasoline to do _______ and move a piston up and down.
A. free energy
B. enthalpy
C. work
D. entropy
PLS HELP ASAP THANK YOU!!!
why is the
equilibrium state considered dynamic ?
Answer:
Dynamic equilibrium only occurs in reversible reactions, and it's when the rate of the forward reaction is equal to the rate of the reverse reaction. These equations are dynamic because the forward and reverse reactions are still occurring, but the two rates are equal and unchanging, so they're also at equilibrium.
Answer:
By IdowShadow the cool man
Explanation:
Dynamic equilibrium only occurs in reversible reactions, and it's when the rate of the forward reaction is equal to the rate of the reverse reaction. These equations are dynamic because the forward and reverse reactions are still occurring, but the two rates are equal and unchanging, so they're also at equilibrium
what 3 pieces of evidence did wegener use to support his theory
What is the average speed of a cheetah that runs 9 km in 10 minutes?
Answer:
0.9m/s
hope it helps....