Answer:
Mercury is released into the environment from many sources. Mercury becomes airborne when rocks erode, volcanoes erupt and soil decomposes. It then circulates in the atmosphere and is redistributed throughout the environment.
I think this is right.
which statement correctly describes the relationship between a blackbody radiator, its temperature, and the electromagnetic radiation it gives off?
a. as the blackbody radiator becomes warmer, it emits light of shorter wavelength
b. as the blackbody radiator becomes cooler, it emits light of shorter wavelength
c. as the blackbody radiator becomes warmer, it reflects different wavelengths of light
d. as the blackbody radiator becomes warmer, it emits random wavelengths of light
Answer:
its not c because i just took the test and i got it wrong
Explanation:
Answer:A
Explanation:
What makes a pure substance different from a heterogeneous mixture? (4 points)
Explanation:
Pure substances are elements and compounds. These substances have the following properties:
All parts are the same throughout which implies that they are homogeneous. They have a definite composition. They cannot be easily separated or broken down into simpler substances by physical meansSeparation by physical means is not possible They have unique sets of physical properties.Heterogeneous mixtures have completely opposite properties as the pure substances as given above.
Plz help me with is thank you
A.4.0m/s
B.4.8m/s
C.5.6m/s
D.6.4m/s
How many moles of oxygen are needed for the complete combustion of 29.2 grams of acetylene?
Moles of Oxygen= 2.8075 moles
Further explanationGiven
29.2 grams of acetylene
Required
moles of Oxygen
Solution
Reaction(Combustion of Acetylene) :
2 C₂H₂ (g) + 5 O₂ (g) ⇒ 4CO₂ (g) + 2H₂O (g)
Mol of Acetylene :
= mass : MW Acetylene
= 29.2 g : 26 g/mol
= 1.123
From equation, mol ratio of Acetylene(C₂H₂) : O₂ = 2 : 5, so mol O₂ :
= 5/2 x mol C₂H₂
= 5/2 x 1.123
= 2.8075 moles
A car emits 411g of carbon dioxide gas in 1 mile of driving. How many liters of carbon dioxide emit at STP?
The volume of Carbon dioxide at STP = 209.22 L
Further explanationGiven
411g of Carbon dioxide gas
Required
The volume of Carbon dioxide
Solution
mol of Carbon dioxide :
= mass : MW CO₂
= 411 g : 44 g/mol
= 9.34
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.
So for 9.34 mol :
= 9.34 x 22.4 L
= 209.22 L
i need help with these. its balancing. the blank spaces are where u put the numbers. and the stuff on the sidd is how u show work. i got lost and dont know what comes next
Which statement would be true if glucagon secretion were permanently inhibited, resulting in negative feedback?
Blood glucose levels would decrease.
Glycogen formation would be inhibited.
Insulin production would decrease.
The synthesis of fat would decrease.
Answer:
Insulin production would decrease.
Explanation:
Insulin and Glucagon work together to balance the sugar levels in the human blood stream. They work together in a negative feedback loop. Glucagon stimulates the liver to release glucose into the bloodstream in a process known as glycogenolysis. Insulin on the other hand is a sugar-lowering hormone.
Therefore, if glucagon secretion were permanently inhibited, insulin production would decrease as there would not be excess blood sugar to be reduced.
Answer:
Insulin production would decrease.
Explain how scientists use balanced chemical equations and molar mass concepts to represent reactions and account for the amount of substances.
Explanation:
Scientists most especially chemists use the mole concepts through balanced chemical equations and molar masses to represent chemical reactions and account for the amount of substances.
The mole concept entails finding molar relationships between reactants and products in a chemical reaction. Mole connects difference chemical parameters and it is used in quantitative analysis of chemical reaction.
First, we work from the known to the unknown. The known is the specie whose mass or number of moles is given.Number of moles = [tex]\frac{mass}{molar mass}[/tex]
After obtaining the number of moles, then go ahead to compared using the balanced reaction with that of the unknown. Then from them find the mass of the unknown.6. Which example has BOTH ionic and covalent bonds? *
Answer:
It’s either A or D buttttt probably d
Explanation:
Bill is pushing a box with 10 N of force to the left, while Alice is pushing the box with 30 N of force to the right. What is the net force?
Answer:
Fnet = 20 Newton
Explanation:
Let the force applied by Brian be Fb.
Let the force applied by Alice be Fa.
Given the following data;
Force, Fb = 10N
Force, Fa = 30N
To find the net force, Fnet;
Net force can be defined as the vector sum of all the forces acting on a body or an object i.e the sum of all forces acting simultaneously on a body or an object.
Mathematically, net force is given by the formula;
[tex] Fnet = Fapp + Fg[/tex]
Where;
Fnet is the net force Fapp is the applied forceFg is the force due to gravitationSince the two force applied to the box are acting in opposite direction, we would subtract their values to find the net force.
Fnet = Fa - Fb
Fnet = 30 - 10
Fnet = 20 Newton
Reasons
4
4
K
Glven: N is the midpoint of JL;
N is the midpoint of KM;
JL = KM
N
Prove: KN = NL
M
Statements
Reasons
1.
N is the midpoint of JL;
N is the midpoint of KM;
JL = KM
1. Given
2.
JN = NL;
KN = NM
2.
3.
3. Segment Addition Postulate
4. KN + NM = JL
4.
5.
5. Transitive Property
6. KN + KN = NL + NL
6.
7.
7. Simplify
8. KN = NL
8.
Gina Wilson (All Things Algebra). 20
Answer:
(1) The two column proof is presented here as follows;
Statement [tex]{}[/tex] Reasons
1. C is the midpoint of [tex]\overline {AE}[/tex] [tex]{}[/tex] Given
B is the midpoint of [tex]\overline {AC}[/tex] [tex]{}[/tex]
D is the midpoint of [tex]\overline {CE}[/tex] [tex]{}[/tex]
2. AC = CE, AB = BC, CD = DE [tex]{}[/tex] Definition of midpoint
3. AB + BC = AC, CD + DE = CE [tex]{}[/tex] Segment addition postulate
4. CD + DE = AC [tex]{}[/tex] Substitution property of equality
5. AB + BC = CD + DE [tex]{}[/tex] Substitution property of equality
6. BC + BC = CD + CD [tex]{}[/tex] Substitution property of equality
7. 2·BC = 2·CD [tex]{}[/tex] Addition of two identical quantities
8. BC = CD [tex]{}[/tex] Division property of equality
9. BC ≅ CD [tex]{}[/tex] Definition of Congruence
(2) The two column proof for the triangular geometric figure is presented here as follows;
Statement [tex]{}[/tex] Reasons
1. 2·WV = XY; 2·YZ = XW; WV = YZ [tex]{}[/tex] Given
2. 2·WV = 2·YZ [tex]{}[/tex] Multiplication property
3. XY = XW [tex]{}[/tex] Substitution Property
4. XW + WV = XV [tex]{}[/tex] Segment Addition Property
XY + YZ = XZ
5. XW + WV = XV [tex]{}[/tex] Substitution Property
XW + WV = XZ
6. XV = XZ [tex]{}[/tex] Substitution Property
Explanation:
Can you help me please I’ll park u brainliest
Answer:
it is called the stigma you also might be able to look it up
Which kind of molecular shape will this molecule have? H-S-H
Answer:
the molecule is formed by covalent bond , and each hydrogen atom forms a single bond with sulphur atom.
Round off 45.68 metres to one decimal place.
Answer:
45.7
Explanation:
Because if the number 1-4 then it goes down and if it 5-9 then it goes up
calculate the quantity of electricity obtained from 2 moles of electrons
The quantity of electricity : 2 Faraday = 193000 Coulomb
Further explanationGiven
2 moles of electrons
Required
The quantity of electricity
Solution
According to Faraday, the amount of current flowing in the electrolysis cell is closely related to the amount of substance that reacts
1 Faraday is the amount of electricity that is passed in the electrolysis cell to obtain 1 mole of electrons. 1 mole of electrons is equivalent to an electric charge of 96500 Coulombs.
The conversion / relationship can be stated as follows:
1 Faraday = 1 mole of electrons = 96500 Coulombs
1 faraday = coulomb / 96500
Can be formulated
Coulomb = Q = I. t so:
[tex]\large {\boxed {\bold {1 \: Faraday \: = \: \dfrac {i \: x \: t} {96500}}}}[/tex]
so for 2 moles electrons :
= 2 x 96500 C
= 193000 C
= 2 Faraday
How many protons, electrons and neutrons does 116Sn4+ have?
Answer:
46 electrons, all I know.
Sorry!
Explanation:
2.At 35°C, a small sample of methane gas (CH4) has a volume of 1.5 liters. The temperature of the methane gas is slowly cooled to 17°C. What is the new volume of the methane sample?
Answer:
V₂ = 1.41 L
Explanation:
Given data:
Initial temperature = 35°C (35 +273.15 K = 308.15 K)
Initial volume = 1.5 L
Final temperature = 17°C (17+273.15 K = 290.15 K)
Final volume = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 1.5 L × 290.15 K / 308.15 k
V₂ = 435.23 L.K / 308.15 k
V₂ = 1.41 L
Ducks and geese have small, fluffy feathers called "down."
How does down help these birds survive?
Answer:
it helps them fly (A)
Explanation:
Answer:
strengths wings?
Explanation:
If I'm right, please give brainliest?
Neeeeeeeedddddd hellllllllllppppppp
The soluble bases are called alkalis. *
true or false
Answer:
True
Explanation:
Those bases which are soluble in water are called alkalis
What is a quantum of energy?
Answer:
In chemistry and physics, quantum refers to a single packet of matter or energy. In practical use, it refers to the minimum amount of energy required for a change or the minimum value of any physical property in an interaction. Quantum is the singular form of the word. Quanta is the plural form of the term.
Explanation:
Answer:
quantum of energy
Explanation:
The term quantum of energy means that the energy is not transferred continuously but as discrete packets of energy. Amount of energy required to move an electron from one energy level to another. The amount of energy an electron gains or loses is. Not always the same. The higher energy levels are.
hope it helps!
Can someone help me with this?
Answer:
Its Vog
Explanation:
I JUST NEED HELP!!!! ASAP!!!!
Hydrogen cyanide has the chemical formula HCN. What's the formal charge on the N atom?
A)
+2
B)
0
C)
–2
D)
–1
Answer:
Formal charge = valance electron - nonbonding electron - (1/2)bonded electron
For nitrogen atom,
Formal charge = 5 - 2 - (1/2)×6
= 5-2-3
= 0
So, the formal charge on nitrogen atom in HCN is "0".
Explanation:
The formal charge on the N atom of hydrogen cyanide, HCN molecule is 0. Option B is correct.
Formal charge is defined as the individual charge of an atom. It is represented as:
Formal charge = valance electron - nonbonding electron - (1/2)bonded electron
The valence electrons in nitrogen atom is 5, there are 2 non bonding electrons and 6 bonded electrons on N atom in HCN,
Thus, For Hydrogen cyanide molecule, the formal charge on nitrogen atom is calculated as:
Formal charge
= 5 - 2 - (1/2)×6
= 5-2-3
= 0
So, the formal charge on nitrogen atom in HCN is "0".
To know more about formal charge here
https://brainly.com/question/2081051
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How are earthquakes, volcanoes, and tsunamis related to the ring of fire?
Answer:
they are not................
Answer: The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area. Along much of the Ring of Fire, plates overlap at convergent boundaries called subduction zones. That is, the plate that is underneath is pushed down, or subducted, by the plate above
Explanation:
Please help me, Thank you!
Answer:
Fe³⁺
Explanation:
When Fe²⁺ loses an electron, it becomes an Fe³⁺ ion.
The loss of an electron in an atom makes the atom becomes positively charged. Further losing electrons makes the atom more positive.
For the given ion;
Fe²⁺ if it loses an electron more, it becomes Fe³⁺.
The expression is given as:
Fe²⁺ → Fe³⁺ + e⁻
How much current is drawn by a 40-W bulb in a 120-V circuit?
please help me :(
In two or more complete sentences explain how to balance the chemical equation,
CH2 + O2 CO2 + H2O and include all steps.
Remember:
to balance equations in chemistry, you have to count the amount of atoms there are in a chemical eg:
the number of atoms in H20 are:
2 atoms of hydrogen
1 atom of oxygen (when there are no numbers by the letter it means that theres only 1 atom of it!)
The number next to a letter means the number of atoms thta it is made up of and atoms are the things it is made up of eg chocolate the ingredients are cocoa, milk and sugar ect so just like that CO2, H20 an ALL types of chemicals are made up of atoms. BUT WE WANT TO KNOW HOW MANY ATOMS- so u need to list these for all the 4 chemicals in the equation.
Im telling u this so that u can list out all of the atoms in each chemical (I will do the first two)
CH2=
1 atom of Carbon
2 atoms of hydrogen
O2=
2 atoms of oxygen
once u have listed out all the atoms from EACH of the chemicals in ur question (CH2, 02, CO2 and H20) categorise them like this
CH2
Carbon=........ Atoms
Hydrogen= .......Atoms
(Make sure the table is like vertical like lemme show u as an example. ATTACHED IS AN EXAMPLE OF WHAT UR WORK SHOULD BE SET OUT AS)
When you see the addition sign it means that elements like oxygen and hydrogen etc..basically add them up like CO2 + H20 theres oxygen in both so add up the atoms of oxygen FOR JUST CO2 AND H20 like if there was one atom of oxygen in CO2 and 2 in h20 add them up and it makes three (1+2=3). 1 oygen atom from CO2 plus 2 oxygen atoms in H20 that makes 3 atoms for both the chemiclas together (THIS WAS JUST AN EXMAPLE THERE ARENT ACTUALLY 2 ATOMS IN H20 OR 1 ATOM IN C02)
Look at the similarities OF ATOM NUMBERS like if CH2 has one atom of Carbon, CO2 ALSO has one atom of carbon which is fine BUT when it comes to differences u need to cross those out and PUT THAT NUMBER on both sides like if O2 has 2 atoms of oxygen and h20 has 1 that means that they need to be balanced like they either both need to be 1 atom or 2 atoms so for that u need to look attachment sorry u just need to cross them out and make them the same
make sure to write about what atoms are, to list out atoms for each chemical, compare the chemicals in both word chemicals and make them even!
Explanation:
4. Which type of bond will form between a calcium atom and a sulfur atom?
Answer:ionic
Explanation: ionic bond formation
In the ionic bond formation between calcium and sulfur, a calcium atom donates two valence electrons to a sulfur atom to form a Ca2+ ion and an S2+ ⁻ ion.
I need help ASAP! I will mark brainiest to whoever is right .
Answer:
iwan loptop di ba yan isearch mo nalang
Explanation:
baka lang ka naman makakita ng swerte na aswers
What is (3 X 10^3) +(2.5 X 10^6)? *
Answer:
Scientific Notation: 2.503 × 10⁶
Standard Form: 2,503,000
Hey there!
[tex]\mathsf{(3 \times 10^3) + (2.5 \times 10^6)}[/tex]
[tex]\mathsf{= 3 \times 10^3 + 2.5 \times10^6}[/tex]
[tex]\mathsf{10^3}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times 10}[/tex]
[tex]\mathsf{\bf = 1,000}[/tex]
[tex]\mathsf{10^6}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10 \times 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times100 \times100}[/tex]
[tex]\mathsf{= 10,000\times100}[/tex]
[tex]\mathsf{= \bf 1,000,000}[/tex]
[tex]\mathsf{= 3\times 1,000 + 2.5 \times 1,000,000}[/tex]
[tex]\mathsf{3\times1,000}[/tex]
[tex]\mathsf{\bf = 3,000}[/tex]
[tex]\mathsf{2.5 \times 1,000,000}[/tex]
[tex]\mathsf{\bf = 2,500,000}[/tex]
[tex]\mathsf{3,000 + 2,500,000}[/tex]
[tex]\mathsf{= \bf 2,503,000}[/tex]
[tex]\boxed{\boxed{\large\textsf{Answer: } \mathsf{ \bf 2,503,000 \ or \ 2.503 \times 10^6}}}\huge\checkmark[/tex]
[tex]\large\textsf{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
