Answer:
Q = 100.42 J
Explanation:
Given data:
Mass of water = 1.500 g
Specific heat capacity of water = 4.184 J/g.°C
Heat required = ?
Initial temperature = 23°C
Final temperature = 39°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 39°C - 23°C
ΔT = 16°C
Q = 1.500 g× 4.184 J/g.°C ×16°C
Q = 100.42 J
1. A gas has a volume of 6.0L, a temperature of 402K, and there are 3.98moles.
What is the pressure? (R = 0.0821 L*atm/mol*K)
Answer:
The pressure should be 21 atm. You can change units if needed
Explanation:
use the forumla PV=nRT. To figure out pressure you need to divide by the volume on each side. the put the apporite units into the formula and Bam. u got it
Which of the following units of length is the smallest?
kilometer
inch
meter
foot
centimeter
Lake Baikal in Siberia is the largest freshwater body on Earth by volume, at 5666 mi³
What is this volume in L ?
largest freshwater body on Earth by volume, at 5666 mi³
1 mi³= 4.168 × 10^12 L
5666 mi³ = 5666 × 4.168 × 10^12 L
volume = 2.362 × 10^16 L
volume is the amount of space an object take up or in other word measure of the size of a body or region in three-dimensional space occupied by an object L x W x HLiquid volume metric base unit is liter(L)cubic centimeters is basic unit for measuring the volume of solids and gasesmaximum volume occupied by gases and minimum volume occupied by solid and liquid comes between themTo know more about volume visit :
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How many moles of sodium atoms do you have if you have 5.60 ~
1023 atoms of sodium. (The mass of one mole of sodium is 22.99 g.)
Answer:
0.93 mol
Explanation:
Given data:
Number of moles of Na atom = ?
Number of atoms = 5.60× 10²³
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
5.60× 10²³ atoms × 1 mol / 6.022 × 10²³ atoms
0.93 mol
Which of the following best describes the relationship between weathering and erosion?
O A. Weathering breaks down rock while erosion carries it to a new location.
O B. Erosion breaks down rock while weathering carries it to a new location.
O C. Weathering lays down the sediment while erosion presses the sediment together.
D. Erosion lays down the sediment while weathering presses the sediment together.
Answer:
it it B
Explanation:
He has to be sure to bring enough material (bricks, concrete, steel etc.) so that when the building is finished, it turns out LONG enough to reach all the way from the roof down to the ground.
If there is any gap left, it would be very difficult for the people who work in the offices to get up into the building. Then it could be a complete waste,
The relationship which best describes weathering and erosion is that
Weathering breaks down rock while erosion carries it to a new location.
Weathering involves the breaking down of rock particles into smaller units
which later forms the soil components.
Erosion involves washing away or movement of the uppermost layer of the
soil to a new location/place and an example is the movement of soil
particles when water from rainfall or wind is present.
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can somebody give me the answer to this ?
Answer:
burning paper
Explanation:
i think its burning paper.
Answer:
That`s tough for me to answer, but the definition is to retain, or require heat or energy to make a function of process. I would think it is fireworks, because a chemical reaction is required to produce the effects, but each answer retains heat in some way. I would still choose fireworks though. Hope that helps . . .
I need answers to all of them
Answer:
Compound 1: Carbon Dioxide (CO_2)
Compound 2: Water (H_2 O)
Compound 3: Potassium Nitrate (KNO_3)
Compound 4: I am unsure
Compound 5: Calcium Sulfate
Explanation:
Which of thes statements about heating up land and water is true
Answer:
b its radiant energy that heats up the earth.
Explanation:
Answer:
The answer is D
Explanation:
Heat from the Earth's core and radiation from the Sun is transferred to the surface of the Earth by conduction. The warm land and water radiates infrared, some of which is absorbed by the atmosphere, adding to its thermal energy.
Write out each of the following numbers in the long form (Part 2): SHOW YOUR WORK
1) 5 * 10 ^ - 6
2) 9 * 10 ^ - 9
3) 3 * 10 ^ 5
4) 2 * 10 ^ - 4
5)8 * 10 ^ 8
Writing each number in full form, we have;
5 * 10^-6 = 0.0000069 * 10^-9 = 0.0000000093 * 10^5 = 3000002 * 10^-4 = 0.00028 * 10^8 = 800000000What is the long form of the numbers?We know that scientific notation affords us the opportunity to write numbers in a manner that is shorter and saves space by the use of exponents.
We shall now try to write each number in the full form;
5 * 10^-6 = 0.0000069 * 10^-9 = 0.0000000093 * 10^5 = 3000002 * 10^-4 = 0.00028 * 10^8 = 800000000Learn more about scientific notation:https://brainly.com/question/18073768
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What is the formula of tin (II) acetate?
Answer:
Sn(C2H3O2)2
Explanation:
C2H3O2 is Acetate
Sn is tin
Acetate has a -1 charge
In order for tin to have a +2 charge, we need two acetates
So we write it as (C2H3O2)2
You just leave Sn blank because of the roman numeral and since it is a transition metal.
So the answer is Sn(C2H3O2)2
Answer:
[tex]\boxed {\boxed {\sf Sn (C_2 H_3 O_2)_2}}[/tex]
Explanation:
First, find what tin and acetate is.
Acetate: C₂H₃O₂ Tin: SnNext, find the charge on acetate, which is -1.
The Roman Numeral 2 in parentheses after tin (II), signifies that the tin has a charge of +2.
We need to balance the charges, so they will equal 0.
1 acetate= -1 Tin = +2The best way to balance is by using 2 acetate molecules
2 acetate = -2 Tin = +2 -2 +2=0If we want 2 acetate molecules, we must add a subscript of 2 after acetate.
Acetate: C₂H₃O₂ 2 Acetate: (C₂H₃O₂)₂Add the tin (Sn) in front
Tin (II) Acetate: Sn (C₂H₃O₂)₂The formula for tin (II) acetate is Sn (C₂H₃O₂)₂
Please show work:
Question below
Answer:
b) 2.0 mol
Explanation:
Given data:
Number of moles of Ca needed = ?
Number of moles of water present = 4.0 mol
Solution:
Chemical equation:
Ca + 2H₂O → Ca(OH)₂ + H₂
now we will compare the moles of Ca and H₂O .
H₂O : Ca
2 : 1
4.0 : 1/2×4.0 = 2.0 mol
Thus, 2 moles of Ca are needed.
A pencil has a density of .875 g/ml it has a mass of 3.5 grams What is the volume
what is a biohazard?
Answer:
a risk to human health or the environment arising from biological work, especially with microorganisms.
Explanation:
Titanium dioxide and zinc oxide are two of the 16 active ingredients approved by the FDA for use in sunscreens. Which compound contains a higher percentage of oxygen by mass
Answer: [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
Explanation:
To calculate the mass percent of element in a given compound, we use the formula:
[tex]\text{Mass percent of oxygen}=\frac{\text{Mass of oxygen}}{\text{mass of compound}}\times 100[/tex]
1. Mass of oxygen in [tex]TiO_2[/tex] = [tex]\frac{32g}{80g}\times 100=40\%[/tex]
2. Mass of oxygen in [tex]ZnO[/tex] = [tex]\frac{16g}{81g}\times 100=19.8\%[/tex]
Thus [tex]TiO_2[/tex] has higher percentage of oxygen by mass.
The compound with the higher percentage of oxygen by mass is titanium dioxide.
Titanium dioxide, TiO2, has a molar mass of 79.866 g/mol and O2 has a molar mass of 32.
Percentage by weight of oxygen in TiO2 = 32/79.866 x 100
= 40.07%
Zinc oxide, ZnO, has a molar mass of 81.38 g/mol
percentage by weight of oxygen in ZnO = 16/81.38 x 100
= 19.66%
Thus, titanium dioxide has a higher percentage by weight of oxygen than zinc oxide.
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What mass of Nz will be needed to produce 31.5 grams of N2O5?
4N2 + 502 --> 2N2O5
a) 158.3 grams
b) 38.64 grams
c) 4.96 grams
d) 16.34 grams
Answer: d) 16.34 grams
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} N_2O_5=\frac{31.5g}{108.01g/mol}=0.292moles[/tex]
The balanced chemical reaction given is:
[tex]4N_2+5O_2\rightarrow 2N_2O_5[/tex]
According to stoichiometry :
As 2 moles of [tex]N_2O_5[/tex] are produced by= 4 moles of [tex]N_2[/tex]
Thus 0.292 moles of [tex]N_2O_5[/tex] are produced by= =[tex]\frac{4}{2}\times 0.292=0.584moles[/tex] of [tex]N_2[/tex]
Mass of [tex]N_2=moles\times {\text {Molar mass}}=0.584moles\times 28g/mol=16.34g[/tex]
Thus 16.34 g of [tex]N_2[/tex] will be needed
2. Create three questions that could be answered after doing this lab activity. Be sure
to include the answers!
what will happen of sodium and water react(be careful)
make slime
make chapathi and paneer butter masala
Ionic compounds can conduct electricity when dissolved in water due to the presence of free floating ions.
True or False
Answer:
True
Explanation:
PLEASE HELP
predict the product of the following reactants and the balance.
1. _______CuSO4+ _____NH4OH->
Answer:
CuSO4 + 2NH4OH -----> Cu(OH)2 + (NH4)2SO4
Explanation:
Need help on 17,19,20 please.
Answer:
c, maybe d, and I think b.
Explanation:
Im sorry if wrong
this from ionic compounds escape room
Answer:
Fe2O3 - S
PbO2 - D
PbO - I
Fe2O - U
Fe(OH)3 - H
FeO2 - T
FeO - R
Pb2O - G
Pb(OH)2 - O
FeOH - N
Pb(OH)3 - A
Explanation:
In writing the formula of ionic compounds we consider the valency or oxidation state of each ion.
For instance, given the compound iron II oxide. The oxidation states of both iron and oxygen are +2 and -2 respectively. Ignoring the charges, this cancels out and we have FeO as the correct formula of the compound.
For Iron III oxide, the oxidation states of iron and oxygen are +3 and -2 respectively, the both atoms exchange charges. If we ignore the signs and write the exchanged numbers as subscripts we obtain the formula Fe2O3.
A gaseous fossil fuel produced from organic matter that is used to heat homes and cook
Answer:
Natural gas
Explanation:
Natural gas is a gaseous fossil fuel produced from organic matter that is used to heat homes and cook food.
Natural gas is one of the most volatile part of hydrocarbons that exist together with fossil fuel.
In a reservoir, natural gas is usually on top of the fossil fuel reserve. It can also be distilled from crude oil as they rises up on top of the column first due to their low boiling pointThe gas mixture is made up light hydrocarbons from methane to hexane.At birth, mammal babies are:
A weak and vulnerable
B strong and independent
C ready to leave their mothers
D able to find their own food
Answer:
It's A: Weak & Vulnerable
Which statement is not true about constitutional isomers?
Answer: They always have the same functional groups.
Explanation:
use quizlet too if you have toooo
Answer:
they have same physical properties is not true
Scientific notation.
Answer:
1.85 x 10^ -5
Explanation:
What are constraints
Answer:
ndcuffaStuff that restrains you from something or someone basicially handcuffs or shackles
Explanation:
Answer:
a limitation or restriction.
OR
stiffness of manner and inhibition in relations between people.
Identify the nuclide produced when fluorine-18 decays by positron emission:
18 9F→01e + ?
Answer:
jdkskdkakalalalalalakandnxkdmymy
Assign an oxidation number to each element in the reaction
The question is incomplete, the complete question is;
Assign an oxidation number to each element in the reaction.
CO(g) + 2H2(g) → CH3OH(g)
In CO, the oxidation number of C is _, and that of O is _.
In H2, the oxidation number of H is _.
In CH3OH, the oxidation number of C is _, that of O is _, and that of H is _.
Answer:
See explanation
Explanation:
If we look at the reaction, in CO, C is +2 while O is -2. Remember that the sum of all the oxidation numbers in a compound must be zero.
The oxidation number of atoms in a diatomic molecule is zero hence in H2, H is zero.
We already know the oxidation states of oxygen and hydrogen in CH3OH to be -2 and +1 respectively. Carbon is;
x + 4(1) + (-2) = 0
x + 2 =0
x = -2
Hence in CH3OH, carbon has an oxidation state of -2.
A weak base reacts with a strong acid to form the salt ammonium nitrate. What is the chemical formula of the weak base?
Answer:
ammonia: NH₃
Explanation:
The product is ammonium nitrate, with the chemical formula NH₄NO₃. This salt is composed of the cation NH₄⁺ and the anion NO₃⁻
Nitrate (NO₃⁻) is formed from the strong acid called nitric acid: HNO₃.
Ammonium ion (NH₄⁺) is formed from the weak base ammonia: NH₃.
Thus, the chemical reaction for the formation of the salt is the following:
HNO₃ + NH₃ ⇒ NH₄NO₃
In the reaction between Fe and CuCl2, the following statement is true:
This is a single displacement reaction. In this reaction, Iron reacts with aqueous solution of copper chloride, which is blue in colour.
The Iron being more reactive, reduces the copper from its solution to make Iron Chloride, which is green in colour. Fe + CuCl₂ → FeCl₂ + Cu. This is also a redox reaction in which CuCl₂ is a reducing agent and Fe is an oxidising agent.
Thus, the reaction between Iron and Copper sulphate is a redox displacement reaction.
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Disclaimer: The question was incomplete. The correct question can be:
In the reaction between Fe and CuCl₂, the following statement is true:
A) It is a single displacement reaction.
B) It is a combination reaction.
C) It is a decomposition reaction.
D) It is a double displacement reaction.
Which of the following is an ion with a negative one charge?
OH₂C-Ö:
O:0-N=0:
: 0 N
30:
All of these choices.
O None of these choices.
Answer:
[no2]- it have 1 negative charge
O-N=O
this Single bond O having negative charge because oxygen need 2 electrons to complete its octet and it have only one bond to complete its octet it having one more electron and this one one more electron creates 1 negative charge on this compound