Answer:
Over time, the limestone is broken down into its chemical parts and may come back to the surface as volcanic CO2 (in the atmosphere). From the atmosphere, the CO2 might again become part of the biosphere by molluscs or corals absorbing the CO2 to help make their shells
Explanation:
Over a long period of time, we would take a look at the rock "limestone" through the rock cycle. Limestone being a sedimentary rock would be converted to marble, a metamorphic rock if subjected to metamorphic conditions over an extensive period of time.
i need help i hate multi selects. 100 points please let me know
Answer:
d would be both liquids and gasses
Explanation:
Answer:
A. Gases
B. Solids
C. Gases
D. liquids and solids
So basically all ur answers are right except D
Explanation:
Brainlist?
9. A container has 56 g of Sc and 95 g of Br 2 in it. If the reaction goes to completion, what is the maximum amount of ScBr3 which could be produced?
Answer:
c
Explanation:
which diagram would it be?
Answer:
2CH4 ------> 3H2 + C2H2
Explanation:
The law of conservation of mass states that atoms can neither be created nor destroyed in a chemical reaction.
The implication of this law is that the number of atoms of each element on the reactant side must be equal to the number of atoms of each element on the product side.
This law is only obeyed by the reaction, 2CH4 ------> 3H2 + C2H2
There were eight atoms of H on the left hand side as well as the right and side of the reaction equation. There were two atoms of C on both the left and right hand sides of the reaction equation respectively. Hence, the law was obeyed here.
HELP HELP IM FAILING PLZ HELP ME
What is the formula mass of calcium nitrate tetrahydrate (Ca (NO3)2 · 4H0]?
Be sure to add the water of hydration, which is the 4H2O part (water surrounding the calcium
nitrate).
102 g/mol
164 g/mol
174 9/mol
236 g/mol
Answer:
236 g/mol
Explanation:
This question is asking to calculate the molar mass/formula mass of calcium nitrate tetrahydrate with the chemical formula: Ca(NO3)2 · 4H20. This is done as follows:
Atomic mass of the constituent elements are as follows:
Ca = 40
N = 14
O = 16
H = 1
Hence, in Ca(NO3)2 · 4H20.
= 40 + {14 + 16(3)}2 + 4 {1(2) + 16}
= 40 + {14 + 48}2 + 4{2 + 16}
= 40 + {62}2 + 4{18}
= 40 + 124 + 72
= 236
Hence, the molar mass of Ca(NO3)2 · 4H20 is 236g/mol.
Answer:
236 g/mol
Explanation:
which organs are part of the respiratory system
If you add more molecules but do not change the temperature or the pressure, what will happen to the system?
the molecules will move faster
O the volume will decrease
the volume will increase
the molecules will move slower
Answer:
the volume will increase
Explanation:
The kinetic energy of gas molecules depend upon the temperature . If temperature is increased , the molecules will move faster . When temperature is decreased , they move slower .
Hence when more molecules are added to a gas without changing its temperature , the velocity of gas molecules will remain unchanged .
Since pressure is also constant , it is volume which will be increased .
It can be explained from universal gas formula as follows
PV = nRT
P , R and T is constant ,
V ∝ n
Volume is proportional to n which depends upon number of molecules .
So volume will increase if number of molecules increases .
what geologic structures are associated with earthquakes
Answer:
Seismic waves are produced when suddenly released some sort of energy stored in Earth's crust, usually when suddenly fracture and "slip" masses of rock straining against each other. Earthquakes occur most frequently along geological faults, narrow zones where rock masses shift in relation to each other.
Explanation:
Hope This Helped. :)
in cubic
A box that is 35 inches X 35 centimeters X 0.065 yards will have a volume of
centimeters.
Answer:
V = 18,493.5114 cm³
Explanation:
Dimensions are;
L = 35 inches
W = 35 cm
H = 0.065 yards
Now, volume is given by;
V = LWH
But our dimensions need to all be in the same unit, so let's convert to cm.
L = 35 inches = 35 × 2.54 cm = 88.9 cm
H = 0.065 yards = 0.065 × 91.44 = 5.9436 cm
Thus;
V = 88.9 × 35 × 5.9436
V = 18,493.5114 cm³
i really need help on this one!!
Suppose Earth’s gravitational force were decreased by half. How would this change affect a game of basketball? Think about the motion of the players and the ball.
Answer:
Due to the decrease in the gravitational force, it will take longer time for ball to reach the ground while dribbling. Moreover, the hang time of players will also be longer. This means that the players will stay on air longer and will be able to jump higher.
The empirical formula of a compound is determined to be N2O5. If the molar mass of the compound is 108 g/mol, determine the molecular formula of the compound.
Answer:
N2O5
Explanation:
Empirical formular is the simplest formular of a compound and shows the atoms present in simple rations.
Molecular formular on the other hand shows the exact number of atoms of element present in a compound.
To obtain molecular formular from empirical formular;
(Empirical formular)n = Molar mass
where n is a simple integer.
(N2O5)n = 108 g/mol
Molar mass of N2O5 = 108 g/mol
(108) n = 108
n = 108 / 108 = 1
Molecular formular = (Empirical formular)n
Molecular formular = (N2O5)*1 = N2O5
In this question, the empirical formular is the same as the molecular formular
An ionic bond always forms between _____ ion with a positive charge and _____ ion with a negative charge.
Answer:
Cation and anion
Explanation:
Positive ion is known as cation and negative ion is known as anion
_____ are bits and pieces of material that end up in a body of water.
Answer:
sediments
Explanation:
Arrange the following atoms in order of increasing size (radius).
Te, S, Se
K, Br, Ni
Ba, Si, F
Answer:
S<Se<Te
Br<Ni<K
F<Si<Ba
Explanation:
Please help me I hate chemistry
disolvin rate is The rate at which a solute dissovles depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.
saturation the degree or extent to which something is dissolved or absorbed compared with the maximum possible, usually expressed as a percentage.
changes in solubility For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution. A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute.
dilution is the making something weaker in force, content, or value.
Colligative properties of solutions are properties that depend upon the concentration of solute molecules or ions, but not upon the identity of the solute. Colligative properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
Water is not an element because it:
Answer:
because is made of more than on type of atom
0.65743 In scientific notation
What kind of information does this map show?
A. The roads that connect different cities
OB. The shapes of different landforms
O C. The elevation of Earth's surface features
D. The natural resources found in different areas
10
If velocity is positive, which would most likely yield a negative acceleration?
O O OO
A final velocity that is faster than an initial velocity.
A time that is less than a half hour.
An initial velocity that is faster than a final velocity.
A time that is greater than a half hour.
Answer:
An initial velocity that is faster than a final velocity
Explanation:
The relationship between velocity and acceleration is given as follow;
Acceleration = Change in velocity / Time
Change in Velocity = Final Velocity - Initial Velocity
From the formular, time is not able to affect the sign of the acceleration.
A negative acceleration is also referred to as deceleration and this occurs when there is a drop in velocity.
A drop in velocity occurs when the initial velocity is faster than the final velocity.
Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:
H2O2 + N2H4 → N2 + H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)
c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)
Explanation:
The equation of the reaction is;
H2O2 + N2H4 → N2 + H2O
Upon balancing the reaction, we have;
N2H4 + 2H2O2 → N2 + 4H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4?
From the equation of the reaction;
1 mol of N2H4 produces 1 mol of N2
0.0250 mol of N2H4 would produce x mol of N2
1 = 1
0.0250 = x
x = 0.0250 * 1 / 1 = 0.0250 mol
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?
From the equation of the reaction;
2 mol of H2O2 produces 4 mol of H2O
x mol of H2O2 produces 1.35 mol of H2O
2 = 4
x = 1.35
x = 1.35 * 2 / 4 = 0.675 mol
c. How many moles of H2O are formed if 1.87 moles of N2 is produced?
The relationship between H2O produced and N2 is;
For every 1 mol of N2 produced, 4 mol of H2O is produced
1.87 mol of N2 produced, how many moles of H2O is produced?
1 = 4
1.87 = x
x = 1.87 * 4 / 1 = 7.48 mol
How many milliliters of an aqueous solution of 0.222 M manganese(II) iodide is needed to obtain 9.57 grams of the salt?
Answer:
139 mL
Explanation:
Given data:
Volume of solution required = ?
Molarity of solution = 0.222 M
Mass of salt = 9.57 g
Solution:
Number of moles of manganese iodide:
Number of moles = mass/molar mass
Number of moles = 9.57 g/ 308.75 g/mol
Number of moles = 0.031 mol
Volume required:
Molarity = number of moles of solute / volume in L
0.222 M = 0.031 mol / V
V = 0.031 mol / 0.222 mol/L
V = 0.139 L
Volume in mL:
0.139 L ×1000 mL / 1 L
139 mL
Explain how the temperature of a substance is related to the kinetic of it molecules.
Answer: this is the explanation
Explanation:
the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles
I really am bad at chemistry
Answer:
A, 4,3,3,4
B, 3,2,2,3
C, 2,6,2,3
D, 1,2,1, 1
What ideas do you have about how two places
could have the same amount of sunlight but
different skin cancer rates?
Answer:
it could depend on the environment of the area, how the sun rays are parting through particles in the air, or it jus might be the amount of heat radiation is coming down cause it could be a chilly sunny day or a hot sunny day
Please help with this
1. Double-Replacement reactions
2. Decomposition
3. Combustion
4. Syntesis
5. Single replacement
Further explanationGiven
Chemical equations
Required
Type of reaction
Solution
1. 2AgNO₃ + MgCl₂ ⇒ 2AgCl + Mg(NO₃)₂
Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant
2. 2KBr⇒2K +Br₂
Decomposition
Single compound breaks down in to 2 or more products
3. C₃H₈ + 5O₂ ⇒ 4H₂O + 3CO₂
Combustion
Hydrocarbon and Oxygen reaction and form water and carbon dioxide
4. NaO + H₂O ⇒ NaOH
Syntesis
2 or more reactants combine to form a single product
5. Zn + CuCl₂ ⇒ZnCl₂ + Cu
Single replacement
One element replaces another element from a compound
5.4 g of Aluminium reacts with 300 mL of 0.2 mol/L hydrochloric acid solution. a. Write equation for the reaction taking place. b. Specify which reactant is limiting and which reactant is excess. c. Find volume of the gas collected at S.T.P d. How many grams of salt are produced at the end of the reaction? e. How many grams of the excess reactant are left ate the end of the reaction? Given: Al=27 , H=1 , Cl=35.5
HCl as a limiting reactant
volume of the gas(H₂)= 0.672 L
mass of salt : =2.67 g
mass of excess left : 4.86 g
Further explanationGiven
5.4 g Al
300 mL of 0.2 mol/L HCl
Required
limitng reactants
volume of the gas(H₂)
mass of salt
mass of excess left
Solution
Limiting reacttantReaction
2Al + 6HCl → 2AlCl₃ + 3H₂
mol Al = 5.4 g : 27 g/mol = 0.2
mol HCl = 0.3 L x 0.2 mol/L = 0.06
mol : coefficient of reactants :
Al = 0.2 : 2 = 0.1
HCl = 0.06 : 6 = 0.01
HCl as a limiting reactant(smaller ratio)
Al as an excess reactant
volume of H₂mol H₂ = 3/6 x mol HCl = 3/6 x 0.06 = 0.03
volume (STP : 1 mol=22.4 L) :
= 0.03 x 22.4 L
= 0.672 L
mass of salt(AlCl₃)mol AlCl₃ = 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mass AlCl₃ :
= mol x MW
= 0.02 x 133.5
=2.67 g
mass of excess(Al) leftmol (reacted) : 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mol (unreacted) : 0.2 - 0.02 = 0.18
mass = 0.18 x 27 g/mol = 4.86 g
Why would it be harder to jump on the planet Jupiter than on Earth?
HELP PLSSS
if you had a block square that weighed 5.00 grams what would be the length of each side
Answer:
[tex]l = 0.793[/tex] cm
Explanation:
Let us assume the density of block square [tex]10[/tex] g/cm³
As we know
Volume = [tex]\frac{Mass}{Density}[/tex]
Thus Volume of this block is equal to [tex]\frac{5}{10} = 0.5[/tex]
As we know volume of square block of side of length "l" is equal to [tex]l^3[/tex]
[tex]l^3 = 0.5[/tex]
[tex]l = 0.793[/tex] cm
plsssss help with this ill give brainliest to first answer
How does the concept of conservation of mass apply to chemical reactions?
Answer:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Which three elements have the most similar chemical properties?
1.
Ar, Kr, Br
2
K, Rb, Cs
3.
B, C, N.
4.
O, N, Si
Answer:
2.
Explanation:
Beacuse they are all group 1 metals. All have the same boiling, melting point and reactivity due to one electron in its outer shell.
Potassium(k), rubidium(Rb), and cesium(Cs) are the three elements from the given list that have the most similar chemical properties.
Therefore the correct answer is option 2.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside of any atom.
From the list of elements, potassium (k), rubidium (Rb), and cesium (Cs) are the three that share the most chemical similarities.
Thus, option 2 is the right response.
To learn more about the atomic number from here, refer to the link;
brainly.com/question/14190064
#SPJ6
How does the rock cycle work help use a easy understanding small summary
Answer: this is how it works
Explanation:
The magma bursts through Earth's surface in the form of a volcano. Heat and pressure deep in the Earth makes some rocks change to metamorphic rock. Layers of rock get squashed and packed together and gradually harden to form sedimentary rock. The igneous rock gets broken down by weather, and the cycle begins again.