MAX TEN MINUTES PLZZZZZ HURRY
Essential Question:
How does the transfer of thermal energy become minimized or maximized?
explain you hypothisith
Answer:
when it reduces heat.
Explanation:
Thermal energy is transferred to material,the motion of its particles speeds up and it's temperature differences.Insulating materials are bad conductors and so this reduces the heat loss by conduction.The material also prevents air circulating inside the cavity,therefore reducing heat loss by convection.Heat loss through the roof can be reduced by laying loft insulation.
25.0(g) of pentane(C5H12) is combined with excess oxygen
Answer:Hlo
Explanation:How are you?
How do you solve -8r=240
Answer:
You solve that dividing beach term by -8 and simplifying which for this answers will give you r=-30
Explanation:
Pls correct me if I’m wrong.
Hope this helps :)
differences between bright half and
Answer:
Explanation:
Bright half starts from a new moon day and ends on a full moon day
dark half starts from a full moon day and ends on a new moon day
Answer and Explanation:
The bright half is the side we see and the dark half is the other side.
If you're referring to the moon, the bright half starts on a new moon day and ends on a full moon, whereas on the other hand dark half starts ona full moon and ends in a new moon, kinda like cycle. There are practically the same and have no big astounding differences between them.
How many moles are there in 3.45 moles of Carbon
Answer:
It would be 151.832775 because one mole is 44.0095*3.45 i hope this helps!
Explanation:
In a submarine beneath the ocean’s surface, a captain peered into a long tube to see possible threats in the sea and air above. This sight tube, called a periscope, was designed by the Frenchman Marie Davey in 1854. Davey’s periscope contained two mirrors, one placed at each end of a vertical tube. The mirrors were set parallel to each other and at 45 degrees to the vertical. The reflective surfaces faced each other. When light from an object on the surface reflected downward, an image appeared to the eye. People in submerged submarines could see what was above them!
Imagine you are in a submerged submarine looking through a periscope. What are some things you might see?
Why is water said to be universal solvent?
A.it dissolves some substances.
B.It dissolves almost all substances
C.It is dissolved by some substances.
D.It is dissolved by almost all substances.
Answer:
B
Explanation:
And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.
Answer:
I believe it's B
Explanation:
Water can dissolve with any that's why it's universal and can dissolve substancrs more than any other Liquid.
please give me brainliest!
hope this helps
Carbon exists in many forms on Earth. The diagram below shows part of the carbon cycle. What is happening in Step 1? *
1 point
Captionless Image
Animals are decomposing and releasing carbon into the soil.
Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
Animals are releasing energy into the environment and storing carbon.
Animals are converting carbon dioxide from the atmosphere to oxygen.
The first step of carbon cycle is animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
What is a carbon cycle?Carbon cycle completes into four steps: photosynthesis, decomposition, respiration, and combustion.
In the first step, carbon enter the environment by respiration, and in the second step, carbon dioxide is consumed by plants.
Thus, the correct option is B.
Learn more about carbon cycle
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Phosgene (Cl2CO), a poison gas used in World War I , is formed by the reaction of Cl2 and CO. The proposed mechanism for the reaction is
Cl2⇌2Cl(fast,equilibrium)
Cl+CO⇌ClCO(fast,equilibrium)
ClCO+Cl2→Cl2CO+Cl(slow)
What rate law is consistent with this mechanism?
Answer:
Rate = k [ClCO][Cl2]
Explanation:
Cl2⇌2Cl(fast,equilibrium)
Cl+CO⇌ClCO(fast,equilibrium)
ClCO+Cl2→Cl2CO+Cl(slow)
The rate determining step from which the rate aw is obtained from is the slowest step of a chemical reaction. In this reaction, the slowest step is;
ClCO+Cl2 → Cl2CO+Cl (slow)
The rate equation for the step is;
Rate = k [ClCO][Cl2]
ClCO is an intermediate and would eventually get cancelled out from the overall rate equation.
Phosgene is the chemical used in the formation of pesticides and ios poisonous. The rate law is given as, k [chloroformylradical][chlorine gas].
What is rate law?The rate law is the relation of the concentration of the reactants and the products with that the speed of the reaction.
The reaction for the formation of phosgene is given as,
[tex]\rm Cl_{2} \rightleftharpoons 2Cl\; (fast,equilibrium)\\\\\rm Cl+CO \rightleftharpoons ClCO\; (fast,equilibrium)\\\\\\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]
The rate law is determined by the rate-determining step which is the slowest step of the reaction.
[tex]\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]
The rate of the equation is given as,
[tex]\rm Rate = k [ClCO][Cl_{2}][/tex]
As COCl is an intermediate the third step will be the rate-determining step.
Therefore, the slow step determines the rate of the reaction.
Learn more about rate law here:
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Complete the following reaction :
HC≡CH + HBr→?
hope it helps you .............
What is the bond order of CH2O
Answer:
It forms 2 single sigma bonds with 2 hydrogen atoms and double (1sigma and 1pi bonds with oxygen atoms. They are convalent
PLEASE CAN SOMEONE PLEASE HELP ME I CAN'T DO IT :(
CaCO3 + H2SO4 __________ + H2O + CO2
Na2CO3 + __________ 2NaCl + H2O + CO2
Answer:
H2SO4 + CaCO3 → CaSO4 + H2O + CO2 - Balanced equation | Chemical Equations online!
Na2co3 HCL nacl h2o co2
This is an acid-base reaction (neutralization): Na 2CO 3 is a base, HCl is an acid. This is a gas evolution reaction, CO 2 is the formed gas.
What is the most likely effect of an increase in precipitation?
Lakes dry up. Shortage of water. Decrease in humidity.
Rafa places some copper into a solution of sodium chloride. No reaction takes place. Using the displacement theory, explain why no reaction took place?
Na more reactive than Cu
Further explanationGiven
Copper in a solution of NaCl
Required
The displacement theory
Solution
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
The voltaic series:
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe²⁺-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Fe³⁺-Ag-Pt-Au
The electrode which is easier to reduce than the hydrogen (H2) electrode has a positive sign (E red= +) and is located to the right of the voltaic series (right of H)
The electrode which is easier to oxidize than the hydrogen (H2) electrode and is difficult to experience reduction has a negative sign (E red= -) and is located to the left of the voltaic series (left of H)
Reaction
Cu + NaCl≠
The existing copper element can not replace the sodium element, which is on the left side so the reaction will not occur.
But if it is reversed, then a reaction can occur
2 Na + CuCl2 → Cu + 2 NaCl
Chemistry Cookie project
Answer:
What's the question?
Explanation:
Answer:
I dont understand, is there supposed to be a picture or question?
Explanation:
cucl2(aq)+na2s(aq)→cus(s)+2nacl(aq)
Write the net ionic equation for this reaction.
Answer:
Cu^2+ (aq) + S^2- (aq) --> CuS (s)
Explanation:
Break up all the soluble compounds into their constituent ions to get the complete ionic equation, and cross off the ones that appear the same on both sides:
Cu (aq) + 2Cl(aq) + 2Na (aq) + S (aq) --> CuS (s) + 2Na (aq) + 2Cl (aq)
2Cl and 2Na appear on both sides of the arrow, so cross those out to get the net ionic equation.
help pleaseee
find the molecular formula of a compound with a molar mass of 70.0 g/mol and an empirical formula of CH2.
Answer:
In order to find the molecular formula from an empirical formula you must find the ratio of their molecular masses.
We know that the molecular mass of the molecule is 70
gmol-1
. We can calculate the molar mass of
CH2
from the periodic table:
C=12.01
gmol−1
H=1.01
gmol−1
CH2 =14.03
gmol−1
Hence we can find the ratio:
14.03
70
≈
0.2
please help
find molecular formula of a compound with a molar mass of 45.0 g/mol and an empirical formula of CH3
Answer: The molecular formula will be [tex]C_3H_9[/tex]
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
The empirical formula is [tex]CH_3[/tex]
The empirical weight of [tex]CH_3[/tex] = 1(12)+3(1)= 15g.
The molecular weight = 45.0 g/mole
Now we have to calculate the molecular formula:
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{45}{15}=3[/tex]
The molecular formula will be=[tex]3\times CH_3=C_3H_9[/tex]
Thus molecular formula will be [tex]C_3H_9[/tex]
How does pouring water extinguish fire?
is nuts and bolts an example of a element or a compound?
Answer:
In this activity, we will pretend that nuts, washers and bolts are 3 kinds of elements. A single washer represents an atom of WASHER. A single nut represents an atom of NUT and a single bolt represents an atom of BOLT. Atoms can be put together to form compounds.
Answer:
compound its that easy well i gotta go
Energy exists in different forms. Which of the following forms of energy best describes the energy stored
in food?
A. electromagnetic energy
B. mechanical energy
C. sound energy
D. chemical energy
Answer:
D. chemical energy
Explanation:
Food contains chemical energy as chemical energy is stored in bonds.
(a)
Name the type of particles that exist in the following objects.
(i) Gold ring:
(ii) Water:
(iii) Balloon:
Answer:
Molecule?
Explanation:
I wanna say molecule, because all of the objects listed have that in common.
whats the powerhouse of the cell?
Answer:
Mitochondria is known as the powerhouse of the cell as it provides teh energy required for the cell to carry out cellular respiration and cellular process that maintain the cell
When the wind blows across a body of water, ____ between the water and air causes the water to move. ions gravity friction density
3. Ni(NO2)3
What’s the name for the formula
Rock whose texture, mineralogy, or chemical
composition has been altered without melting it.
Answer:
I believe it would be C or B
why do non-metal aroms form covalent bonds e.g. H2O
Answer:
Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom. ... Covalent compounds tend to be soft, and have relatively low melting and boiling points.
9. I have the lowest electronegativity of the nonreactive elements. My family name is ____________. I am classified as a ___________. I have _____________ valence electrons.
Answer:
I have the lowest electronegativity of the nonreactive elements. My family name is alkali metals. I am classified as a reactive metal. I have one valence electrons.
Explanation:
Electronegativity refers to the ability of the atoms of an element to attract electrons to itself. Based on their nature, non-metals are electronegative elements whereas metal are electropositive as they have a tendency to give up their electrons rather than attract electrons to themselves.
In the periodic table of elements, non-metallic character, and hence, electronegativity increases from left to right across a period, and decreases down a group. The most electropositive element is fluorine. On the other hand, electropositivity decreases across a period from left to right but increases on going down a group. Hence, the most electropositive element is Francium. This also means that Francium is the least electronegative element,
francium belong to the group 1A of the periodic table which are the most reactive metals. The family of group 1A elements are known as alkali metals. They possess only one valence electron which they easily give up to form univalent positive ions or cations. Francium is a radioactive element.
Which of these equations is balanced, and which is not balanced? Explain how you can tell.
a) 2C2H6+ 7O2 → 4CO2+ 6H2O
b) 2MgCO3 + H2SO4 → 2MgSO4 + H2O + 2CO2
Answer:
a is balanced
Explanation:
a) reactant/ product
(2x2)=4c / 4c
(2x6)=12h / 12 h
14o / (8o+6o)=14 o
Practice working with numbers that have exponents. In the blank provided, write greater than, less than, or equals.
a. 10–2 ____________________ 10–3
b. 10–14 ____________________ 101
c. 10–7 ____________________ 0.0000001
d. 100 ____________________ 101
Answer:
a. 10⁻² > 10⁻³
b. 10⁻¹⁴ < 10¹
c. 10⁻⁷ = 0.0000001
d. 100 > 10¹
Explanation:
a. 10⁻² > 10⁻³We can rewrite those numbers as 0.01 and 0.001. That way the answer becomes clearer.
b. 10⁻¹⁴ < 10¹Any positive number with a negative exponent will be less than 1.
c. 10⁻⁷ = 0.0000001In the decimal, the 1 is exactly 6 zeros away from the dot, meaning the 1 is in the seventh place.
d. 100 > 10¹10¹ is equal to 10.