Answer:
molecule
Explanation:
Sulfur dioxide represents a molecule.
A molecule is a covalent compound that has discrete or separate units. The formula of this molecule given is:
SO₂
Here, two non-metals share their valence electrons form a covalent bond.
An atom is the smallest indivisible particle of a substance that takes part in a chemical reaction. An ion is an atom that has lost or gained an electron.1) In the image below, determine the temperature in Fahrenheit.*
C 40
F
300
30
80
20
60
10
0
40
°F
Answer:
28.8889 or in simple terms 28.9 :) hope i helped
Explanation:
Answer:
28.8889 or in simple terms which I like to use is 28.9
LOOK AT THE PICTURE!! i’ll mark as brainliest!!
Answer:
c
Explanation:
which one would it be?
Answer:
1 chlorine and 2 hydrogen
Explanation:
because in the picture you already have a hint wichbis chlorine so that eliminiates C and D
and its 2 hydrogens because if it were 1 then there wouldn't be anything adding in the chemical equation
should i get this? i heard it smells good
Answer: Maybe not? Unless you care about namebrand, theres lots of dupes.
Compare and contrast ionic and molecular compounds.
Answer:
Ionic compounds consist of positive and negative ions bound together by electrical attraction. Molecular compounds are groups of atoms held together by covalent bonding, or the sharing of electrons..
Explanation:
What happens to the ice pack over time?
Answer:
it melts?
I don't really know but I have 60% that I think the answer is correct
The complete combustion of acetic acid, HC2H3O2(I) to form water, H2O(I), and CO2(g), at constant pressure releases 871.7 kJ of heat per mol of acetic acid.
Write a balanced thermochemical equation if 5.0g of acetic acid will be used in the reaction.
HC2H3O2(I) + O2 --- H2O(I) + CO2(g) H= -871.7 kJ
Answer:
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
Explanation:
We know that 5.0 g of acetic acid will contain, 5.0g/60 g/mol = 0.083 moles of acetic acid
Now from the reaction equation;
1 mole of acetic acid evolved -871.7 KJ of heat
0.083 moles of acetic acid will evolve 0.083 * -871.7 = -72.35 KJ
For 5.0 g of acetic acid, we can write;
HC2H3O2(I) + O2(g) ---> H2O(I) + CO2(g) ΔH= -72.35 kJ
See photo please. I need help on balancing equations.
1.4,2,4,2
2.6,2,2
3.
Explanation:
sorry but can I finish the balancing below the comment after some ours
Answer:
A, 2,1,2,1
B, 3,1,1
C, 1,2,1,2
D, 2,1,1
What is the trachea and where does it go?
Answer:
The trachea is a tube-like structure within the neck and upper chest. It transports air to and from the lungs when a person breathes. When a person inhales, air travels through the nose or mouth, down the trachea, and into the lungs.
Explanation:
Brainliest plz
In an experiment, zinc chlorate decomposed according to the following chemical equation. Zn(ClO3)2 → ZnCl2 + O2 (Molar mass of Zn(ClO3)2 = 232.29 g/mol; ZnCl2 = 136.286 g/mol; O2 = 31.998 g/mol) If the mass of zinc chlorate was 150 grams, which of the following calculations can be used to determine the mass of oxygen gas formed?
The mass of oxygen gas : = 61.98 g
Further explanationGiven
Reaction
Zn(ClO3)2 → ZnCl2 + O2
The mass of zinc chlorate was 150 grams
Required
The mass of oxygen gas
Solution
Balanced equation :
Zn(ClO₃)₂ → ZnCl₂ + 3O₂
mol of Zn(ClO₃)₂ :
= mass : MW
= 150 : 232.29 g/mol
= 0.6457
From equation, mol ratio of Zn(ClO₃)₂ → ZnCl₂ : O₂ = 1 : 3, so mol O₂ :
= 3/1 x mol Zn(ClO₃)₂
= 3/1 x 0.6457
= 1.937
Mass of O₂ :
= mol x MW
= 1.93 x 31.998 g/mol
= 61.98 g
Or we can use equation :
= (150 x 3 x 31.998) : (232.29 x 1) grams
= 14399.1 : 232.29
= 61.98 g
The number of moles of Zn(ClO₃)₂ was calculated as 150 g / 232.29 g/mol, substitute that value into the equation along with the molar mass of O₂ (31.998 g/mol) to find the mass of oxygen gas formed.
Given:
The mass of oxygen = 61.98 g
The mass of zinc chlorate = 150 grams
The balanced reaction is:
Zn(ClO₃)₂ → ZnCl₂ + 3O₂
Mol of Zn(ClO₃)₂ :
Mass: MW
150: 232.29 g/mol
0.6457
From equation, mol ratio of Zn(ClO₃)₂ → ZnCl₂ : O₂ = 1 : 3, so mol O₂ :
= 3/1 x mol Zn(ClO₃)₂
= 3/1 x 0.6457
= 1.937
Mass of O₂ :
Mol x MW
=1.93 x 31.998 g/mol
= 61.98 g
= (150 x 3 x 31.998) : (232.29 x 1) grams
= 14399.1: 232.29
= 61.98 g
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Please helppppppp. I need this D:
50 points
Answer:
dont u mean 13 points?
Explanation:
As the radius of a star increases, how do you think its mass might change?
Answer:
by wind
Explanation:
As the radius of the star increases, the mass will also increase.
This is all about the relationship between the radius and mass of stellar main sequence stars.
Now, usually they are expressed in solar units and as such as seen in the graph image attached, the relationship between the radius(R) and mass(M) of a main-sequence star is seen by the curve attached. It is clear that the higher the radius becomes, the larger the mass of the star also becomes.
To clarify this also, we have a mass - lumosity relationship formula where given as;
L = [tex]M^{3.5}[/tex]
Where;
M is mass
L is lumosity
We know from basics of stellar main sequence stars, that a larger radius gives a much brighter lumosity.
From the mass-lumosity formula, we see that Increase in lumosity is directly proportional to an increase in mass. Therefore in the same vein, we can say that increase in radius is directly proportional to an increase in mass.
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Plz Plz Plz help!!!!!
Which list of elements contains a metal, a metalloid, and a nonmetal?
1) Ag, Si, I2
2) Ge, As, Ne
3) K, Cu Br2
4) S, Ci2, Ar
balance this
C3H3N + O2 ⇒ C + H2O + N2
Answer:
4C₃H₃N + 3O₂ → 12C + 6H₂O + 2N₂
Explanation:
The given reaction equation is expressed as:
C₃H₃N + O₂ → C + H₂O + N₂
The problem here entails balancing of the chemical reaction.
So;
assign letters a,b,c,d and e as coefficients that will balance the expression:
aC₃H₃N + bO₂ → cC + dH₂O + eN₂
Conserving C : 3a = c
H : 3a = 2d
N : a = 2e
O: 2b = d
let a = 1, c = 3, e = [tex]\frac{1}{2}[/tex] , d = [tex]\frac{3}{2}[/tex] , b = [tex]\frac{3}{4}[/tex]
Multiply through by 4;
a = 4, b = 3, c = 12 , d = 6 and e = 2
4C₃H₃N + 3O₂ → 12C + 6H₂O + 2N₂
Sonar stands for “sound navigation and ranging.” What assumption was proved wrong after the invention of sonar?
A.
The age of the ocean floor is variable.
B.
The ocean floor is featureless.
C.
The ocean floor is changing.
D.
The ocean floor is denser than continental crust.
The ocean floor being featureless was the assumption was proved wrong after the invention of sonar.
What is Sonar?This employs the use of sound propagation to measure the distance or presence of objects under the water.
This helped to show that the ocean floor had features such as canyons, mountains etc hence option B was chosen.
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How does adaption allow mice with the mutation to survive better in some areas
Answer: Mutations can cause instant adaptations, while natural selection is the process by which adaptations occurs over a series of generations. Adaptations are changes or processes of changes by which an organism or species becomes better suited for its environment. A mutation is an alteration of the DNA sequence.
Which of these is not a chemical property?
Answer: srry
Explanation:
How many gallons of water would be in a container that is 256 millimeters X 20 inches X.045 meter.
Why must ionic compound have a total charge of 0?
The melting point of an ionic compound is likely to be (answer) a molecular compound.
options:
higher than
lower than
the same as
Answer:
Higher than
solution and the liquid state
hard
Explanation:
In the reaction Cu(s) + 2 AgNO3(aq) -> 2 Ag(s) + Cu(NO3)2(aq) how much Ag can be produced from 49.1 g of copper
Answer:167.9 g Ag
Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2
63.55 g Cu —> 2*107.688 g Ag
So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag
WHICH SIGN CAN SAY THAT A PHYSICAL CHANGE HAS TAKEN PLACE
1.FORMATION OF GAS
2.FORMATION OF PRECIPITATE
3.EVOLUTION OF HEAT
4.ALL THE ABOVE
Answer:
4. all of the above
Explanation:
that my answer hehehe..
Radio waves are used to transmit information on various channels. What is the wavelength of a radio wave having the frequency of 5.40 × 1010 Hz?
1. Analyze the Problem
ν = and c = Unknown: λ =
You know that because radio waves are part of the electromagnetic spectrum, their speed, frequency, and wavelength are related by the formula c = λν.
Answer:
5.56×10¯³ m
Explanation:
From the question given above, the following data were obtained:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
The velocity of electromagnetic wave, frequency and wavelength are related according to the equation:
Velocity (c) = wavelength (λ) × frequency (v)
c = λv
With the above formula, the wavelength of the radio wave can be obtained as follow:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
Velocity (c) = 3×10⁸ m/s
c = λv
3×10⁸ = λ × 5.4×10¹⁰
Divide both side by 5.4×10¹⁰
λ = 3×10⁸ / 5.4×10¹⁰
λ = 5.56×10¯³ m
Thus, wavelength of the radio wave is 5.56×10¯³ m
WILL GIVE BRAINLIEST!!
In the Andes Mountains, how does energy flow in an ecosystem that contains grasses and shrubs, pumas, and guanacos?
guanacos to grasses and shrubs to pumas
grasses and shrubs to guanacos to pumas
pumas to grasses and shrubs to guanacos
pumas to guanacos to grasses and shrubs
Answer:
I could be wrong but I am pretty positive that the correct order is grasses and shrubs to guanacos to pumas.
Which technique helps you become more resoureful
Answer:
There is an abundance of technology to help students become more resourceful and productive. For example, mind mapping can help kids better understand problems and devise plans by visualizing connections, outlining different sides of issues, and determining next steps.
Explanation:
Plz help me with the electron dot structures! I’ll mark brainliest!
3. How many grams of oxygen are needed for the
complete combustion of 11 grams of propane, C3H8?
C3H8 + 5 O2 + 3 CO2 + 4 H2O
Answer:
Mass = 40 g
Explanation:
Given data:
Mass of oxygen needed = ?
Mass of propane = 11 g
Solution:
Chemical equation:
C₃H₈ +5O₂ → 3CO₂ + 4H₂O
Number of moles of propane:
Number of moles = mass/molar mass
Number of moles = 11 g/ 44.1 g/mol
Number of moles = 0.25 mol
now we will compare the moles of propane and oxygen.
C₃H₈ : O₂
1 : 5
0.25 : 5/1×0.25 = 1.25 mol
Mass of oxygen needed:
Mass = number of moles × molar mass
Mass = 1.25 mol × 32 g/mol
Mass = 40 g
What human activities could increase erosion?
Check all that apply.
stripping the land of vegetation to build a mall
letting cattle overgrazing farmland
planting trees and shrubs
surrounding a corn field with a fence or shrubs
deforestation
plowing fields
I think it is the first one, the second one, and the fifth one. Hopefully helps :)
Substance X has a specific heat capacity that is twice as large as Substance Y. If both samples ended up at the same change in temperature from the same amount of energy added, what is the relationship between the masses of the two samples? Explain.
Answer:
Substance X has a smaller mass
Explanation:
The relationship between the mass of the two samples is that the mass of X is smaller compared to the mass of Y.
The specific heat capacity is given as:
C = [tex]\frac{H}{m x change in temperature}[/tex]
We can see that the higher the specific heat capacity the lesser the mass or simply put, the specific heat capacity of a body is inversely related to its mass.
If the amount of heat is constant i.e the same and the specific heat capacity of X is twice that of Y, then substance X has a smaller mass
The molecular weight of KMnO4 is 158 g/mol. If you wanted to make 500 mL of a 0.1M stock solution of KMnO4, how much solid KMnO4 would you need to add before filling mL flask of water?
Solid KMnO₄ needed = 7.9 g
Further explanationGiven
MW KMnO₄ = 158 g/mol
500 mL(0.5 L) of a 0.1M stock solution of KMnO₄
Required
solid KMnO₄
Solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Input the value :
n = M x V
n = 0.1 M x 0.5 L
n = 0.05 mol
Mass KMnO₄ :
= mol x MW
= 0.05 x 158 g/mol
= 7.9 g
The solid KMnO₄ a person need to add before filling water flask will be:
"7.9 g".
Molecular weightAccording to the question,
Molecular weight of KMnO₄ = 158 g/mol
Volume of solution = 500 mL or,
= 0.5 L
Molarity = 0.1 M
We know the relation,
Molarity, M = [tex]\frac{n}{V}[/tex]
or,
→ n = M × V
By substituting the values,
= 0.1 × 0.5
= 0.05 mol
hence,
The mass of KMnO₄ will be:
= mol × Molecular weight
= 0.05 × 158
= 7.9 g
Thus the response above is appropriate.
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