1. 5 moles
2. 75.6 grams
3. 2 moles
4. 1.806 x 10²⁴ particles
Further explanationGiven
mass and moles of compound
Required
mass, moles and number of particles
Solution
1. 530 g Na2CO3
mol = 530 g : 106 g/mol
mol = 5
2. 4.2 moles H2O
mass = 4.2 moles x 18 g/mol
mass = 75.6 grams
3. 12.04 x 10²³ O2
mol = 12.04 x 10²³ : 6.02 x 10²³
mol = 2
4. 3 moles of Mg
particles = 3 x 6.02 x 10²³
particles = 1.806 x 10²⁴
How would a rock's weight on the Moon or the Sun compare to its weight on Earth? Assume
Answer: on Earth, a 5.0-kg object weighs 49 N; on the Moon, where g is 1.67m/s2 1.67 m/s 2 , the object weighs 8.4 N.
Explanation:
Answer:
The sun is 27.9 times heavier the moon is 16.5% of it on earth
Explanation:
On the moon, there is less gravity pulling on objects, so they weigh less. For example, a rock that weighs one pound while on Earth will weigh less than that if it is taken to the moon.
how can you protect your feet from ice?
Answer:
Wear the Right Shoes
Catalano. Equally important, wearing warm shoes or boots can protect a person's feet in frigid temps. “Wearing water-resistant, insulated footwear serves as a barrier between the feet and outside elements; this is particularly important for patients with neuropathy or Raynaud's phenomenon.
How many liters are in 3.45 moles of oxygen gas at STP?
A) 2.08 x 10 24 L
B) 110.4 L
C) 77.28 L
D) .15 L
Answer:
22.4L of one mole of any gas
or you can use PV=nRT
3.45*22.4=77.28
Explanation:
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Answer:
Barb tested the streak and luster.
Explanation:
Pls mark brainliest
Answer:
Mineral size and luster.
Explanation:
Balance the equation N2 +H20= NH3 + NO
Answer:
N₂ + 3H₂O → 2NH₃ + 3NO
Explanation:
The reaction expression is given as:
N₂ + H₂O → NH₃ + NO
We are to balance this reaction expression.
To do this, assign a,b,c and d as the coefficients that will balance the expression:
aN₂ + bH₂O → cNH₃ + dNO
Conserving N: 2a = c
H: 2b = 3c
O: b = d
let a = 1, c = 2, b = 3 and d = 3
So;
N₂ + 3H₂O → 2NH₃ + 3NO
Pls help me I beg you
Answer:
Es la c
Explanation:
Espero que te ayude
Answer:
D. Nathan applies enough force through pushes to move the piano
Explanation:
What moves the piano is a net force that is applied through the effort of Nathan on the instrument.
Force is a pull or push on a body.
When force is applied on a body, it causes the state of motion of the body to change.
Therefore, if a body has a net force greater than zero, the body will in likewise begin to move. As Nathan pushes on the piano, it will eventually move.
How many molecules are in a 22.8 gram sample of Methane?
-Please explain how to solve it and show work
The speed of light in a vacuum is 2.998 x 108 m/s. How long does it take for light to circumnavigate the Earth, which has a circumference of around 24,900 miles? Do not enter "seconds" as part of your answer. Watch your Sig Figs!
Answer:
0.13 s
Explanation:
We'll begin by converting 24900 mile to metres (m). This can be obtained as follow:
1 mile = 1609.344 m
Therefore,
24900 mile = 24900 mile × 1609.344 m / 1 mile
24900 mile = 4.01×10⁷ m
Finally, we shall determine the time taken for light to circumnavigate the Earth, this can be obtained as follow:
Distance = 4.01×10⁷ m
Speed = 2.998×10⁸ m/s
Time =?
Speed = distance / time
2.998×10⁸ = 4.01×10⁷ / time
Cross multiply
2.998×10⁸ × time = 4.01×10⁷
Divide both side by 2.998×10⁸
Time = 4.01×10⁷ / 2.998×10⁸
Time = 0.13 s
Thus, it will take 0.13 s for light to circumnavigate the Earth.
Consider the following reaction:
Cl2 + Na2S → 2NaCl + S
The percent yield of sulfur when 71.0 g of Cl2 is reacted in
excess Na2S solution is 73.0 %.
What is the actual mass of sulfur yielded by this reaction?
(Molar mass of S = 32.1 g/mol, molar mass of Cl2 = 71.0 g/mol)
Answer:23.4
Explanation:
thank you for the answer
Answer:
this for u
Explanation:
hope it helps ☺️
What can break light apart
Write the empirical formula for c2h6o2
Answer:c1h3o1
Explanation:
Ahahah I’m getting points nah jp here
C1h3o1
c) how many atoms of O are in 45.0g of C12H22011
Answer:
6.022×1023 oxygen atoms
What is the oxidation state of S in HSO42-?
Answer:
+5
Explanation:
As i believe you add all the states up so Oxygen is +2, Sulfur is +2 adn Hydrogen is +1, i believe.
The oxidation state of sulfur (S) in HSO₄²⁻ is equal to +5.
What is the oxidation state?The oxidation state can be described as the oxidation number of the chemical species or ions. The cation exhibits a positive ionic charge while Anion exhibits a negative ionic charge. The number of electrons gained or lost decides the oxidation state of the ions.
In the modern periodic table, the elements on the left side are electropositive (metals) because they donate one or more electrons. The elements on the right side are electronegative as they accept one or more electrons and get a negative charge.
Considering that the charge on the S is x, We know that the charge on the oxygen is -2 and on hydrogen H is +1. The overall charge is -2.
+ 1 + x + 4(-2) = - 2
x - 7 = - 2
x = 7 - 2
x = + 5
Therefore, the charge on sulphur (S) in HSO₄²⁻ is +5.
Learn more about oxidation state, here:
brainly.com/question/28793261
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What is the density of a rock that has a mass of 35 grams and a volume of 7.0 g/mL
Answer: 5
Explanation: Density equals mass divided by volume (D=M/V). Thus, 35/7=5.
The density of a rock : ρ = 5 g/cm³
Further explanationGiven
mass = 35 g
volume = 7 cm³
Required
The density
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density
m = mass
v = volume
Input the value :
ρ = 35 g : 7 cm³
ρ = 5 g/cm³
An unknown substance has an empirical formula of CH2 and an experimental molar mass of 56.12 g/mol. Calculate the molecular formula for this compound.
Answer:
Molecular formula = C₄H₈
Explanation:
Given data:
Empirical formula = CH₂
Molar mass of compound = 56.12 g/mol
Molecular formula = ?
Solution:
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = 12× 1 + 1.01 × 2= 14.02 g/mol
n = 56.12 / 14.02
n = 4
Molecular formula = n (empirical formula)
Molecular formula = 4 (CH₂)
Molecular formula = C₄H₈
What is the chemical formula of CuH10N2O11.
A chemical formula tells us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many there are for each element in the form of subscripts.
Hope I helped :)
Which organelle packages materials and distributes them throughout the cell?
lysosome
chloroplast
Golgi body
cell membrane
Pleaseee!!
Answer:
golgi body
Explanation:
trust meeeeeeeeeConsider the equation below.
Upper C a upper C upper O subscript 3 (s) double-headed arrow upper C a upper O (s) plus upper C upper O subscript 2 (g).
What is the equilibrium constant expression for the given reaction?
K subscript e q equals StartFraction bracket upper C a upper O EndBracket over upper C a upper C upper O subscript 3 EndBracket EndFraction.
K subscript e q equals StartFraction StartBracket upper C upper O subscript 2 EndBracket StartBracket upper C a upper O EndBracket over StartBracket upper C a upper C upper O subscript 3 EndBracket EndFraction.
K subscript e q equals StartBracket upper C upper O subscript 2 EndBracket.
K subscript e q equals StartFraction 1 over StartBracket upper C upper O subscript 2 EndBracket EndFraction.
Answer:
K^eq= [CO2] [CaO] / [CaCO3]
Explanation:
Cuz it is
Stars A and B have the same absolute brightness and are the same temperature, but when you look in the sky, Star A
looks dimmer. Why is this?
Star Ais closer than Star
B
Star A is farther away than Stars
с
Stars A and B are the same distance
None of the above
Answer:
star a is farther away
Explanation:
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The distance time graph for four objects is shown below:
Which objects is moving at constant speed?
A. Object A
B. Object B
C. Object C
D. Object D
Answer:
Option A
Explanation:
Remember constant means staying the same so in order to remain constant on the graph the line has to keep going up remaining the same pace. Which means the answer is option A or "Object A." The graph consists of a line going up at a constant speed without any bends or turns which all the other options consist of.
Hope this helps.
What are zebra mussels?
Answer:
The zebra mussel is a small freshwater mussel.
What is the main cause of weathering on a beach?
the movement of the waves
the sunshine heating the sand
the pet dogs running on the sand
the people walking on the beach
how do people and water affect each other?
Answer:
is this for science or another class?
Answer:
Water is peace. They include sedimentation, pollution, climate change, deforestation, landscape changes, and urban growth. ... Each type of change to a landscape will have its own specific impact, usually directly on natural ecosystems and directly or indirectly on water resources.
Explanation:
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Answer:
I think the answer might be D. but im not 100 percent sure
Explanation:
Answer:
D
Explanation:
The other answers are technically opinions. Who gets to define 'too hot' or 'too windy'?
please compare between physical and chemical properties of matter
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change
Explanation:
I got this from chem.libretexts.org in case you wanted to know
Diagram electron configuration of hydrogen (1), sodium (11), K (19) what do they have in common?
They can only hold 2 electrons in the first outershell
Students want to replace the material that connects the battery and the bulb in the circuit. Which material would be the best choice?
A Copper, because it is a conductor
B String, because it is flexible.
C Plastic, because it is an insulator.
D Glass, because light energy can move through it.
Answer:
a is ok
Explanation:
if they had gold it would be better but no
20 POINTS! SAVE ME PLS!!!
What is an easy way to determine the amount of valence electrons that an element will have?
A. The valence electrons are the same as the period number.
B. The valence electrons are the same as the atomic number.
C. The valence electrons are the same as the 1's place of the group number.
D. All of the above.
Answer:
A. it is A. i am 80% sure it is A,
Explanation: