Answers
Answer:
Thus, the required heat is 79kJ 79 k J .
Explanation:
i think its the right bottem one
Related Questions
Identify the shape below:
PLEASE HELP
Answers
Answer:
linear angleee
Explanation:
lol i dont know what to put here
Answer:
B) Bent
There are a lot of types of bents but this one is linear bent.
What is a free body diagram? what is it used for?
Answers
Answer:
A free body diagram is used to calculate static and dynamic forces acting on an object. In other words, a free body diagram is the starting point to develop a mathematical model to find and calculate various forces acting on a body.
Explanation:
Which type of reaction occurs in the following?
2HgO(s) Right arrow. 2Hg(l) + O2(g)
a decomposition reaction in which a metal is reduced
an acid-base neutralization reaction to produce oxygen gas
a displacement reaction involving two metals
a combustion reaction involving burning a metal in oxygen
Answers
Answer:
decomposition
Explanation:
the reactants turn into two different products, thus the reaction is decomposition.
AB -> A + B
Answer:
A: a decomposition reaction in which a metal is reduced
Explanation:
HgO is actually the metal Mercury and in the equation Mercury is being decomposed into the elements Hg and O. (the element for Mercury and Oxygen) So the equation they give you is a decomposition.
a 31 g sample of a compound that contained only
Answers
The question is incomplete, the complete question is;
A 31 g sample of a compound that contains only the elements C,H and N is completely burned in O2 to produce 44.0 g of CO2, 45.0 g of H2O, and 92.0 g of NO2. Determine the empirical formula of the compound.
Answer:
CH5N2
Explanation:.
Mass of C = 44.0g/44.0 g/mol = 1 mol * 1 = 1 mole of C
Mass of H = 45.0 g/18 g/mol = 2.5 moles * 2 = 5 moles of H
Mass of N = 92.0 g/46 g/mol = 2 moles * 1 = 2 moles of N
Dividing through by the lowest mole ratio;
1/1, 5/1, 2/1
1 : 5 : 2
Hence the empirical formula is;
CH5N2
PLEASE HELP: 60 POINTS
Select all that apply!
The emission of a Beta particle has the effect of:
a change in mass of an electron emitted from the nucleus
decreasing mass by one unit
increasing mass by one unit
adding a proton to the nucleus
converting 1 neutron to 1 electron and 1 proton
Answers
At equilibrium at 2500K, [HCl]=0.0625M and [H2]=[Cl2]=0.00450M for the reaction H2+Cl2 ⇌ HCl.
a. Determine the balanced equation and write the equilibrium expression
b. Determine the K eq
c. Will this process favor the reactants or products at equilibrium?
Answers
Answer:
a. [tex]H_2+Cl_2 \rightleftharpoons 2HCl[/tex]
b. K = 192.9
c. Products are favored.
Explanation:
Hello!
a. In this case, according to the unbalanced chemical reaction we need to balance HCl as shown below:
[tex]H_2+Cl_2 \rightleftharpoons 2HCl[/tex]
In order to reach 2 hydrogen and chlorine atoms at both sides.
b. Here, given the concentrations at equilibrium and the following equilibrium expression, we have:
[tex]K=\frac{[HCl]^2}{[H_2][Cl_2]}[/tex]
Therefore, we plug in the data to obtain:
[tex]K=\frac{(0.0625)^2}{(0.00450)(0.00450)}\\\\K=192.9[/tex]
c. Finally, we infer that since K>>1 the forward reaction towards products is favored.
Best regards!
According to Banquo, the King "Sent forth great largess to your offices." What
gift does King Duncan bring for Lady Macbeth?
Answers
Answer:
Diamond
Explanation:
The answer is gotten from Act 2, Scene 1 of the play by Shakespeare titled "Macbeth". In this scene, we see that Banquo met Macbeth late in the night where they had a profound conversation about the gift of diamond which king Duncan had given to Banquo to deliver to Macbeth.
Oxidation numbers of oxygen in H2PO4 and H2O2 is_____ respectively
Answers
Answer:
-2 , -1
Explanation:
H2PO4=-1
+1 × 2 + +5 + 4 ×O=-1
7+ 4O =-1
4O= -8
O = -2
H2O2=0
+1 × 2 +2 x O =0
2 + 2O=0
O= -1
(As the oxidation number of Hydrogen is +1 , and we have 2 hydrogen atoms so we multiply by 2 , while the oxidation number of P is +5 in this equation, also the compound as a whole equals -1 , then we do the steps as followed)
(while the other compound as a whole equals zero , and doing steps as followed)
*if anything is unclear send me a message*
How are chemical equations balanced?
Answers
Lithium forms ions with a charge of lt Oxygen forms ions with a charge of 2- in the ionic compound lithium oxide, how many
atoms of lithium will there be if there is 1 atom of oxygen?
HELP ME
Answers
Answer:
There are 2 lithium atoms in the ionic compound lithium oxide, Li₂O
Explanation:
The charge of ions formed by lithium = 1⁺
The charge of ions formed by oxygen = 2⁻
In the ionic compound lithium oxide having 1 atom of oxygen, we have;
For the compound to be electronically neutral, the sum of the charges of the atoms in the ionic compound is zero
The charge of 1 atom of oxygen in the lithium oxide compound + The charge of the 'n' number of lithium atoms in the lithium oxide compound = 0
∴ 2⁻ + n × 1⁺ = 0
n × 1⁺ = 0 - 2⁻ = 2⁺
n = 2⁺/(1⁺) = 2
n = 2
The number of lithium atoms in the lithium oxide compound, n = 2
Therefore, there are two lithium atoms in the ionic lithium oxide (Li₂O) compound
which substance will evaporate first???????????????????
Answers
Answer:
I think it would be a liquid.
Explanation:
If the temperature hits a certain point, it will turn to ice. If the ice gets exposed to heat, it will melt and return back to it's natural form, a lqiuid. If the liquid is exposed to enough heat, it will evaporate. Not sure if this is right, but I tried my best!
Name the following compound:
CH2 ≡ CH2
Ethyl
Ethyne
Ethane
ethane
Answers
Answer:
Answer is A. Ethyl.........
Answer:
D. ethane
Explanation:
How many moles of gas are contained in 890.0 mL at 21.0 at C degrees and 750.0 mm Hg pressure?
Answers
Answer:
There are 0.0364⋅mol
Explanation:
How have scientists discovered the structure of atoms?
a.By looking at them under a microscope
b. By running experiments that expose their properties
c. By examining only the largest atoms.
d. Bysplitting them apart.
Answers
Answer:
Explanation:Well most scientists used microscopes but they also looked at bigger ones so the answer would be “by running experiments that expose there properties”
Why do metal boats float?
Answers
Answer:
I hope this will help you
Explanation:
The air that is inside a ship is much less dense than water. That's what keeps it floating! The average density of the total volume of the ship and everything inside of it (including the air) must be less than the same volume of water.
Please make me brilliant
The faster rate of reaction was caused by using a higher temperature. Explain, in terms of particles, why a higher temperature causes a faster rate of reaction.
Answers
Answer:
Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.
Explanation:
true or false, the special olympics started as a backyard summer camp?
Answers
Answer:
True
Explanation:
hope this helps:)))
A balloon occupies 175 cm at 25.0 C. What volume will it occupy at 42.5 °C?
Answers
175 cm³ instead of 175 cm.
Answer:
297.5 cm³
Explanation:
From the question;
Initial volume; V1 = 175 cm³
Initial temperature; T1 = 25°C
Final temperature; T2 = 42.5°C
From Charles law we can find the volume V2 from the equation;
V1/T1 = V2/T2
Making V2 the subject gives;
V2 = V1 × T2/T1
V2 = (175 × 42.5)/25
V2 = 297.5 cm³
2. Describe how a cold front affects weather.
Answers
Answer:
Cold fronts can produce dramatic changes in the weather.
Explanation: They move fast, up to twice as fast as a warm front. As a cold front moves into an area, the heavier (more dense) cool air pushes under the lighter (less dense) warm air, causing it to rise up into the troposphere.
Answer:
the person above is correct
Explanation:
just to confirm it
hope th8s helps!
have a good day :)
What are the reactants in the following equation; NaOH + HCI --> NaCl + H2O
a)NaOH and HCI
b)HCI and H20
c) NaOH and NaCl
d)HCI and water
Answers
Can someone help please I will give Brainlyiest
Answers
Answer:
See Explanation
Explanation:
moles of NH₃ = 11.9g/17.03 g/mol = 0.699 mole
moles of CN₂OH₄ = 1/2(0.699) mole =0.349 mole
Theoretical yield of CN₂OH₄ = (0.349 mole)(60 g/mole) = 20.963 grams
%Yield = Actual Yield/Theoretical Yield x 100%
= 18.5g/20.963g x 100% = 88.25%
Answer:
same process as last solution I did for you except the mole ratio isn't 1:1 here it is 2:1 so you diveide the moles of NH3 by 2 to get the urea moles
here I got 88.16% yield
Explanation:
After Dalton's proposed atomic theory, several atomic models were developed. Which model was the first propose the existence of
small, dense nucleus?
Answers
Answer: Rutherford's model was the first propose of the existence of small, dense nucleus's.
Explanation: The atom, as described by Ernest Rutherford, has a tiny, massive core called the nucleus. The nucleus has a positive charge. Electrons are particles with a negative charge. Electrons orbit the nucleus. The empty space between the nucleus and the electrons takes up most of the volume of the atom.
Answer: Here is the correct image of the first atomic model it's in the picture!
Explanation: I did it on USA Test Prep to see which one is right
The molar mass of two equally sized samples of unknown gaseous compounds is shown in the table. Molar Mass Comparison Gas Molar Mass A 17 g/mol B 36.5 g/mol Which statement describes the density and diffusion of both gases at STP? Gas A has a higher density and diffuses faster than Gas B. Gas A has a higher density and diffuses slower than Gas B. Gas A has a lower density and diffuses faster than Gas B Gas A has a lower density and diffuses slower than Gas B.
Answers
Answer:
Effusion is the process of a gas being poured out through a hole diametrically smaller than the structural exit of the container.
A lighter gas effuses faster than a heavier gas.
Thus gas A has a lower density and effuses slower than Gas B.
Explanation:
The gas with a lower molar mass will have a lower density and diffuses at a slower rate. Thus gas A has a lower density than gas B and diffuses slower than gas B.
Three points should be noted here;
The density of any substance is related to the molar mass.[tex]D=M/V[/tex], where [tex]D[/tex] is the density, [tex]M[/tex] is the mass and [tex]V[/tex] is the volume of the substance.The density of the gas is directly proportional to the molar mass of the gas.Hence the gas A has lower density and the gas B has higher density as the molar mass of A is [tex]17 g/mol[/tex] and of B is [tex]36.5 g/mol[/tex].
About Diffusion please note the below points;
Diffusion is the process of movement of a substance from the area of higher concentration to the area of lower concentration.The gas with a smaller mass will diffuse slower in rate than the gas with a higher mass.Hence the gas A diffuses slower in rate than gas B.
Thus the correct answer is "Gas A has a lower density and diffuses slower than Gas B".
Learn more about the density of gas here: https://brainly.in/questions/16376906
Question: why do astronauts wear organge suits vs white suits
Full answer please..
Answers
an atom is the smallest unit of an element that retains the ___ of that element
Answers
an atom is the smallest unit of a pure substance or element that can exist and still retain the properties of the original substance or element
True or false: Equal but opposite forces pushing on the same object produce a net force of zero on the object.
Answers
Answer:
true.................
Answer:
the answer is true hope it helps
Can you help me plz I think it’s b or c
Answers
i think its C pls dont get mad if it is wrong
The Earth has how many satellites?
(i know this is not chemistry theres no science one)
Answers
Answer:
Well it depends, There are THOUSANDS of inactive satellites. Even scientists don't know how many as for active ones there is about 1 957 according to nasa
Explanation:
What type of energy transfer happens when you turn on a light bulb?
Answers
Answer:In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb
Explanation:
Just trust me
Answer:
A type of energy
Explanation:
CH4 and CO₂ are the chemical formulas for:
Answers
Answer:
CH4 = Methane
CO2 = Carbon dioxide
Hope this Helps!!Hope this Helps!!:)There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Therefore, the name of CH[tex]_4[/tex] and CO[tex]_2[/tex] are Methane and Carbon dioxide respectively.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds. The melting and boiling points are higher in ionic compounds.
chemical formula Chemical name
CH[tex]_4[/tex] Methane
CO[tex]_2[/tex] Carbon dioxide
Therefore, the name of CH[tex]_4[/tex] and CO[tex]_2[/tex] are Methane and Carbon dioxide respectively.
To learn more about chemical compound, here:
https://brainly.com/question/26487468
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