Answer:
Because the rock underwent lava and heat/pressure transformation. They are cooled and heated by magma, and then under go pressure. No fossils would be found in those.
Explanation:
Hope this helps! :)
Answer:
Because...
Explanation:
Igneous rock is cooked in extreme hot temperatures.
Metamorphoc is lava cooled downed.
Maya made this picture to represent a chemical reaction:
Which of the following statements best explains the type of chemical reaction represented by Maya's picture?
It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.
It represents a decomposition reaction because two reactants break apart and form two products.
It is neither a synthesis reaction nor a decomposition reaction because the total mass of the products is less than the total mass of the reactants.
It represents a synthesis reaction because the same atoms are present in the reactants and products.
Answer:
It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.
Explanation:
This reaction would be considered a single replacement reaction.
The chemical reaction involves the products and the reactants. The image is neither synthesis nor decomposition as the two products are formed from two reactants. Thus, option A is correct.
What is a chemical reaction?A chemical reaction includes the chemical interaction between the reactants to yield the products. In a synthesis reaction, two reactants interact to produce a different molecule or compound.
In a decomposition reaction, a reactant undergoes splitting to produce products and energy. But in the image two reactants produces two products that neither of the reaction shows.
This type of reaction is seen as the single replacement reaction where the more reactive element displaces the less reactive from the compound to form the new molecule.
Therefore, option a. Maya's picture represents a single replacement reaction but not a synthesis or decomposition reaction.
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what would Sodium+oxygen -> sodium oxide look like in chemical formula?
4 Na + O2 → 2 Na2O
I think that's it
Question 12 of 20
What is the charge on an atom with an equal number of protons and
electrons?
A. Neutral
B. It depends on the type of atom.
C. Negative
D. Positive
Answer:
The charge on an atom with an equal number of protons and electrons is neutral. (option A.)
Answer:
A) Neutral
Explanation:
The Brazilian rainforest is an area with a significant biodiversity as the rain forces replace with agriculture land it is reasonable to predict a reduction in
Answer:
biodiversity
Explanation:
As rainforest is replaced with agricultural land, it is reasonable to predict a reduction in the biodiversity.
The rainforest supports a myriad of plants, animals, and microbial species which altogether constitute what is scientifically known as biological diversity or simply biodiversity.
When rainforest is removed for agricultural purpose, the variety of plants, animals, and microbes are removed along with it. Agricultural crops and the flora/fauna they support cannot be as diverse as the original rainforest layer that was been removed. Hence, a reduction in biodiversity becomes inevitable.
Answer:
Bb
Explanation:
What are some benefits that come from volcanoes?
Answer:
Volcanoes cool off the earth by emitting heat from its interior. They also add islands and for example, Hawaii was created / is made out of volcanoes. The deposits from volcanoes can also be used for building materials. Volcanic explosions have caused the atmosphere and oceans to form. Volcanic deposits also create land which is fertile.
During reaction between calcium and oxygen valence electrons
A. are transferred from atoms of calcium to atoms of oxygen to form Ca+ and O- ions
B. are shared between atoms of calcium and atoms of oxygen
C are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ions
D. are transferred from atoms of oxygen to atoms of calcium to form Ca- and O+ ions
Answer:
C are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ion
Explanation:
Calcium is a meta and Oxygen is a non metal. The bond that forms between a metal and a non metal is an ionic bond. In an ionic bond, the metal loses electrons while the non metal gains the electrons; hence there is transfer of electrons.
Calcium belongs to group 2 and oxygen needs 2 more electrons to complete it's electronic configuration.
Calcium would lose two electrons to form Ca+2 and oxygen would gain two electrons to form O-2 ion
The correct option is;
C. are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ion
The structure of the Earth is divided into four major components: the crust, the mantle, the outer core, and the inner core.
A. True
B. False
Helpppppppppppppppppppppppp
Answer:
C
Explanation:
all of the fish, bacteria, and mammals that live in a lake
hope this helps!
To which galaxy does the Sun belong?
A Centaurus
B Milky Way
C Andromeda
D Canis Major
Pls help
C6H14 (g) + O2 (g) -> H20 (g) + CO2 (g)
chemical reaction?
Answer:
Single displacement (Substitution)
Explanation:
How many moles of salt (NaCl) are in a teaspoon of salt that contains 5.00 g?
Answer:
1
Explanation:
M r ( NaCl ) = A r ( Na ) + A r ( Cl ) = 23 + 35,5 = 58,5
So, 1 mol of NaCl has a mass of 58,5 g.
Moles of NaCl = 58,5 g NaCl
times (x)
1 mol NaCl = 58,5 g NaCl = 1,00 mol NaCl
According to the mole concept, there are 0.140 moles in teaspoon of salt that contains 5 g.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.Number of moles is calculated as, mass/molar mass.
In this case number of moles is calculated as, 5/35.5=0.140 moles.
Thus, there are 0.140 moles in 5 g teaspoon of salt.
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If we want to store the energy produced from a wind turbine, where do we store the energy?
Please help
I will give you Brainliest
answer:
it is usually stored in large above-ground tanks or in underground caverns
good luck :)
hopefully, this helps
have a great day !!
**next time you should try goo-gling it, it'll save you the points :)**
help? perhaps? some?
Which of the following best describes the location of element Tin?
Group 4 , Period 4, , ,
Group 16, Period 5
Group 14, Period 5
Group 5, Period 15
Answer:
The location of element tin is
Group 14, Period 5
Explanation:
Order the items below from largest to smallest size.
ITEM BANK
1 atom of oxygen
1 mole of oxygen
1 molecule of oxygen
3.01 X 1023 atoms of oxygen
4 grams of oxygen
1_
2_
3_
4_
5_
Answer:
1- gram of oxygen, 2- 3.01x1023 atoms of oxygen, 3- 1 molecule of oxygen, 4- 1mole of oxygen, 5- 1atom of oxygen.
What is the molarity of a solution made by diluting 0.025L of 6.0 M HCl until
the final volume of the solution is 1.75 L?
Answer:
Explanation:
Use the dilution equation: M1V1 = M2V2
M1 = 6.0 M
V1 = 0.025 L
M2 = ?
V2 = 1.75 L
(6.0 M)(0.025 L) = M2(1.75 L)
Solve for M2 --> M2 = 0.086 M HCl
Two Places were freshwater is found on earth
Answer:
Explanation:
Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps. Of all the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things!
Calculate the volume occupied by 2.00 moles of H2 at 300.0 Kand 1.25
atm
Answer:
39.4 Liters
Explanation:
Using the general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question;
P = 1.25atm
V = ?
T = 300K
n = 2.00mol
Using PV = nRT
V = nRT/P
V = (2 × 0.0821 × 300) ÷ 1.25
V = 49.26 ÷ 1.25
V = 39.41
V = 39.4 Liters
Your car burns gasoline as you drive up a large mountain. What energy
transformation is the car performing?
O A. Chemical energy to kinetic energy and gravitational potential
energy
B. Kinetic energy to chemical energy and light energy
C. Chemical energy to kinetic energy and nuclear energy
D. Gravitational potential energy to sound energy and nuclear energy
SUBNI
Answer:
chemical energy to kinetic energy
Explanation:
Answer:
A. Chemical energy to kinetic energy and gravitational potential
energy
Explanation:
Which of the following is a part of the kinetic-molecular theory?
(PLEASE HELP)
Your answer:
Most of the volume of a gas is occupied by gas particles.
The particles of a gas are in constant, random motion.
The average kinetic energy of a gas is dependent upon the identity of the gas.
Gases have indefinite shape and indefinite volume.
Attractive forces between gas molecules must be accounted for with a gas law calculation.
Answer:
2)The particles in a liquid are moving past one another constantly.
3)The particles in gas move freely in all directions.
4)The particles in a solid vibrate in a fixed position.
6)The particles in a gas have few attractions between them.
7)The particles in all states of matter are always moving.
Explanation:
write the molecular formula of glucose
Answer:
C₆H₁₂O₆
Explanation:
In a chemical reaction, the reactants (beginning elements or compounds) but have the same number and type of atoms as the products (the new substance created). This is an example of...
a) law of conservation of mass
b) law of conservation of energy
c) covalent bonding
d) product synthesis
Answer:The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. ... There are two oxygen atoms in the reactants and two atoms of oxygen in the product.
Explanation:
When traveling to another country from the United States, it is often
helpful to know how to quickly convert imperial units to Sl units. If one
mile equals 1.61 kilometers, how many miles would a student walk if they
traveled 5 kilometers? *
Please help
Answer:3.107
Explanation:
explain why the constellations in the night sky change with the seasons
Answer:
Explanation:
If observed through the year, the constellations shift gradually to the west. This is caused by Earth's orbit around our Sun. In the summer, viewers are looking in a different direction in space at night than they are during the winter.
What conditions prevail (are mostly found) in the rain shadow area?
-dinosaurs and rocks conditions
-dry and desert conditions
-cold and foggy conditions
-wet and rainy conditions
28g of aluminum reacts with 45g oxygen
1) complete balanced equation?
2) what is the limiting reactant?
3) how many grams of product could be formed?
4) how many grams of excess would you predict?
5) if you actually measured 50g of product, what is the percent yield?
Answer:
answer below:
Explanation:
1) 4 Al + 3 O2 --> 2Al2O3.
2) Al mol= 28/27 = 1.037mol
O mol= 45/16 = 2.812mol
Al : O
4 : 2
x : 2.812
cross multiply
4 x 2.812/2 = 5.624 mol of Al
Al is limiting reactant
3) 28/5.246 = 5.34product can be formed (not that much sure)
4) 45/ 0.5185 = 86.79
86.79 - 5.34 = 81.45g
5) 50 / 81.45 x 100 = 61.39% ( i guess)
i hope this hleps you
Which indicates how evidence of climate change supports the theory of continental drift?
1. coal fields in several continents
2. volcano formation
3. glacial evidence
4. folded mountains in Africa and South America
Answer:
glacial evidence found in South America
Answer: C. Glacial evidence
Analyzing models compare an atom’s structure to a ladder. Identify one way in which ladder is not a good model from the atom.
Answer:
Climbing a ladder assumes that you would touch/use each step only once. Electrons will take one layer that is empty first, and previous layers or "steps" will continue being filled with additional electrons only when every other layer is occupied by, at least, one electron.
Explanation:
A good analogy is what passengers in a bus do. Everyone tries to sit alone first and only when every pair of seats has a person already seated, people will use them as well, sitting next to each other.
How many grams of hydrogen has will be produced from the reaction of zinc metal with 85 grams of hydrochloric acid?
Answer:
2.4 grams of H
Explanation:
Zn+2HCl=ZnCl2+H2
85gHCl x 1 mol HCl/36.458 g HCl x 1 mol H/2 mol HCl x 2.016 g H/1 mol H = 2.4 g H. (I know this is kinda hard to read, but I had the same question for my test and this is what I did to get 2.4. I hoped this helped)
If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?
Answer:
1 and 4
Explanation:
