Answer:
1. não entendi
.
3. não entendi
4. não entendi e
5. não entendi
2. não entendi
rysor
Explanation:
Answer:
here...
Explanation:
1 - Temperature is a quantitative measure of how hot or cold something is. Temperature is fundamentally linked to the kinetic energy of atom-scale particles. The Celsius scale is based on the older centigrade scale, adapted slightly to take account of the absolute temperature scale, measured in kelvins, symbol K.
2- Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.
3- When a system absorbs or loses heat, the average kinetic energy of the molecules will change. Thus, heat transfer results in a change in the system's temperature as long as the system is not undergoing a phase change.
4- As the temperature increases, the kinetic energy of the molecules of the liquid increases. The movement of the molecules gradually overcomes forces of attraction between the molecules, with the result that they have greater freedom to move, over greater volumes.
5- The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
how many valence electrons does hydrogen have
Answer:
Since hydrogen is the first element, its electron configuration is 1s1.
Explanation:
It has only one electron in its valence shell.
Valence electrons are the outermost electrons or electrons in the largest energy level. Hydrogen has only one electron, so that electron is a valence electron.
Answer:
One valence electron !!
Explanation:
6. What does a numerical subscript following a set of parentheses in a chemical
formula mean?
A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
As an example, calcium hydroxide is [tex]\bold { Ca(OH)_2 }[/tex] . The subscript (2) indicates that calcium hydroxide contains two hydroxide ions.
Therefore, A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
To know more about Chemical formula
https://brainly.com/question/17429336
A mixture of metals with properties different than the metals by themselves is called a(n) __________.
Answer:
Alloy
Explanation:
What is the formula for nickel || dichromate
Answer: Cr2NiO7 is the molecular formula for nickel II dichromate.
What are the 2 basic parts of an atom?
Answer:
nucleus and electrons
Explanation:
nucleus contains protons and neutrons
What are land plants used for?
Answer:
Land plants are also known as Embryophytes. Embryophytes are complex multicellular eukaryotes with specialized reproductive organs. The name derives from their innovative characteristic of nurturing the young embryo sporophyte during the early stages of its multicellular development within the tissues of the parent gametophyte.
Explanation:
Answer:
there used for mountains , wait I'm just trynna get points ya feel me
Explanation:
Remember! All ___________________________ are __________________________
but not all Atoms are elements.
Answer:
all element are atom but all at all atom are element
Explanation:
because all atoms of an element are same whereas atom of different element are different
which one of these is NOT a unit for a reaction rate. 1) g/mL 2) M/min
define sedimentary, metamorphic, igneous
Answer:
these are all types of rocks
sedimentary are formed through the accumalation of different material from earths surface. Like the grand Canyon!
Metamorphic rocks are formed from heat, preasure, or a combination. Found mostly near tectonic plates meet.
Igneous are molten rock.
Explanation:
Sedimentary- a rock that has formed from sediment deposited by water or air
Metamorphic- a rock that has transformed by heat,pressure,or other natural causes
Igneous- a rock that has been solidified by lava or magma
Single displacement (replacement)
Explanation:
Single displacement (replacement) is kind of reaction in which 1 atom of reactants only change in product.
Which of the following has the smallest atomic radius?
a B
b Al
c F
d N
e Ga
Answer:
c. F
Explanation:
As you go top to bottom down a column of the periodic table, atomic radius increases.
As you go left to right across a period of the periodic table, atomic radius decreases.
Knowing this trend, that means that the smallest atomic radius would be located in the top right of the periodic table. The closest element to that point is fluorine, or answer C.
Use the periodic table to determine which of the
following could be an isotope of bromine (Br).
Check all that apply.
Z = 79, A = 196
Z = 35, A = 79
A = 79, N =44
D Z = 44, N = 44
DONE
How does Natural selection lead to the Evolution of bacteria?
Answer:
Bacteria can evolve quickly because they reproduce at a fast rate.
Explanation:
Bacteria can evolve quickly because they reproduce at a fast rate. Mutations in the DNA of bacteria can produce new characteristics. A random mutation might cause some bacteria to become resistant to certain antibiotics, such as penicillin.
Cobalt(II)chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl2.6H2O. An analysis showed that 25.0g of this hydrate contains 11.3g of water. What us the present water by weight in this hydrate?
Answer:
The present water by weight for the hydrate = 45.2%
Explanation:
From the given information;
The present water by weight = (weight of the water/ total weight of the hydrate) × 100
The present water by weight = (11.3/25) × 100%
The present water by weight = 0.452 × 100%
The present water by weight for the hydrate = 45.2%
Explain the trend in boiling points as you move down group v11
Answer:
Fluorine
Chlorine
Bromine
Iodine
Boiling point increases as you go down the group v11
Explanation:
The elements of Group VII are the halogens consisting of f fluorine (F), chlorine (Cl), bromine (Br), iodine (I). All of which are non metals and exists as diatomic molecules - F2, Cl2, Br2, I2 with intermolecular attractions between the two molecules of each element held by Van der Waals dispersion force.
Moving down the group, the size of the atoms increases in size from Fluorine, F2 and Chlorine, Cl2 which are gases to Bromine , Br2 which exists as a liquid to solid, Iodine, I2. This attributes to the increasing in Strength of the Van der Waals forces as you go down the group. In order to break the vanderwaals forces , More heat energy is required to change thier states leading to the increase in boiling point going down the group.
Fluorine
Chlorine
Bromine
Iodine
Boiling point increases as you go down the group
Which have a mass of 0 amu?
A. Protons
B. Neutrons
C. Electrons
D. Protons and neutrons
E. Protons and electrons
F. Neutrons and electrons
I give Brainliest!
Answer:
c
Explanation:
Answer:
C. electrons. They also have a charge of -1
who is princess tianas best friend, if you can get her name right then ill give you brainliest
Answer:
Oo i think her name is Tiana..... ❤️❤️Answer:
Charlotte La Bouff
Explanation:
"Lottie" if you will
Photosynthesis
+ carbon sunlight
dioxide
+
oxygen
sugar +
water +
Cellular
respiration
+ energy
Convert 0.6330 mol of Na3PO4 to grams. Show the unit analysis by inserting the correct components into their unit- factor slots.
(see picture)
Answer:
No of moles = mass in gram / molar mass
Mass in gram = no of moles× molar mass
Mass in gram = 0.6330× 163.94
103.77 gram
Explanation:
I NEED HELP ASAP PLS
picture included^^^^^^ ^^
brainliest;) ^
Explanation:
20g of Na and 10g of Cl2 which is in excess?
The equation of the reaction is given as;
2 Na + Cl2 --> 2 NaCl
From the equation;
2 mol of Na reacts with 1 mol of Cl2
Converting the masses of reactants given to mol
Number of moles = Mass / Molar mass
Na;
Number of moles = 20 / 23 = 0.8696 mol
Cl2;
Number of moles = 10 / 71 = 0.1408 mol
In the chemical equation, the ratio was 2: 1 however with the masses, we can tell that Na is in by far excess.
0.8696 mol of Na would require 0.4348 of Cl2 (Present = 0.1408 mol)
This means;
Na - Excess Reactant
Cl2 - Limiting Reactant
Second part; How much NaCl would be produced?
The limiting reactant determines how much of the product is formed.
From the equation of the reactant;
1 mol of Cl2 produces 2 mol of NaCl
0.1408 mol of Cl2 would require x mol of NaCl
1 = 2
0.1408 = x
x = 0.2816 mol of NaCl
Converting to mass;
Mass = Molar Mass * Number of moles
Mass = 58.44 g/mol * 0.2816 mol
Mass = 16.46 g
The parts of the Earth that contain living organisms
Answer:
Biosphere
The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area.
Explanation:
Answer:
Biosphere
Explanation:The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area. hope this helps (:
What volume, in liters, does 128 grams of O2 occupy at STP?
89.6 L
22.4 L
67.2 L
44.8 L
Answer: 89.7 L
Explanation:
89.6 volume, in liters, does 128 grams of O2 occupy at STP. Therefore, option A is correct.
What do you mean by volume ?A volume is simply the amount of space taken up by any three-dimensional solid. A cube, a cuboid, a cone, a cylinder, or a sphere are examples of solids. Volumes differ depending on the shape.
Every three-dimensional object requires some amount of space. The volume of this space is measured. Volume is defined as the space occupied by an object within the boundaries of three-dimensional space. It is also known as the object's capacity.
1 mole Oxygen has mass 32 grams
Mole of Oxygen in 128 g mass = 128 g / 32 g/mol
= 4.0 mol O2
At Standard temperature and pressure this has volume
= 4.0 mol × 22.4 L/mol
= 89.6 L
Thus, 89.6 volume, in liters, does 128 grams of O2 occupy at STP, option A is correct.
To learn more about the volume, follow the link;
https://brainly.com/question/1578538
#SPJ6
BRAINLIEST!
How do the ions in metals behave?
a They are negatively charged.
b They are repelled by electrons.
c They are attracted to each other.
d They are repelled by each other.
Answer:
attracted towards each other
Explanation:
hope u like the ans
Answer:
The ions in metal behavior by repelled by electro
if I have a +2 oxidation number do I give up or accept electrons?
Answer:
I will give up the electrons
Explanation:
Consider the following rules:
1. An atom loses electrons if its oxidation number is positive.
2. An atom gains electrons if its oxidation number is negative.
3. An atom neither gains nor loses electrons if its atomic number is zero.
As I have an oxidation number [tex]+2[/tex] that is oxidation number is positive, so, I will give up electrons.
What mass of CO2 would you need so that you had 2.5 moles of it?
A:44g
B: 88g
C. 110g
D: 132g
How many electrons will strontium lose to satisfy the octet rule?
Answer:
Two Electrons.
Explanation:
Strontium is the atom with atomic number 38, and electron configuration is [Kr] 5S^2 which mean just two electrons more than Krypton which one of the Noble gases.
describe a difference in our inner planets and outer planets
An equimolar mixture of X (g) and Y (g) is placed inside a rigid container at constant temperature. The particle diagram above represents the changes that occur over time. Based on the particle
diagram, which of the following best predicts whether or not the system has reached equilibrium by 300 s?
a. It is not possible to determine that the system has reached equilibrium by 300 s because the stoichiometry of the reaction is not known.
b. it is not possible to determine that the system has reached equilibrium by 300 s because the amounts of X, Y, and XY have continued to change
c. The system has reached equilibrium by 300 s because the rate of formation of XY is constant
d. The system has reached equilibrium by 300 s because the rates of consumption of X and Y are equal
Answer:
B
Explanation:
t= 300s has more XY than t=200s, which means that it continues to change
*i think
The system has been predicted to be not possible to reach equilibrium as changing X and Y concentration. Thus, option B is correct.
Equilibrium has been described as the condition in the reaction mixture, when the concentration of the product and the reactant are equal.
The given reaction has been represented as:
[tex]\rm X+Y\rightarrow\;XY[/tex]
Reaction mixture at 300 sThe given reaction has been represented as, with the increase in time, there has been the consumption of the reactant and the formation of product.
The concentration has been continuously changing with time. Thus, the determination of the equilibrium has been difficult with changing X and Y concentration.
Thus, option B is correct.
Learn more about equilibrium concentration, here:
https://brainly.com/question/7949757
Solution made up of a
Answer:
solute and solvent
Explanation:
Because solutes dissolves in solvent to form a solution
FB and were to bond the difference in electronegativity would be
and we would expect the bond to be
ionic covalent, poler covalent)
ASAP quick