The number of moles of Nitrogen : == 7.975
Further explanationGiven
9.60x10²⁴ molecules of nitrogen dioxide (NO2)
Required
The number of moles
Solution
Reaction
N2 + 2O2 → 2NO2
moles of NO2 :
= 9.6 x 10²⁴ : 6.02 x 10²³
= 15.95
From the equation, mol N2 :
= 1/2 x mol NO2
= 1/2 x 15.95
= 7.975
The number of molecules :
= 8 x 6.02 x 10²³
= 4.816 x 10²⁴
How many milliliters does 80 g of a 2 g/mL density liquid take up?
Answer:
40mL
Explanation:
Given parameters:
Mass of liquid = 80g
Density = 2g/mL
Unknown:
Volume of the liquid = ?
Solution:
Density of a substance is its mass per unit volume.
It is expressed as:
Density = [tex]\frac{mass}{volume}[/tex]
Volume = [tex]\frac{mass}{density }[/tex]
So;
Volume = [tex]\frac{80}{2}[/tex] = 40mL
mole-mass problem:
Water decomposes to produce hydrogen gas and oxygen gas. How many moles of oxygen would be produced from 10.0 moles
water? 2 H2O → 2 H2 + O2
Answer:
5.00 mol O₂
Explanation:
2H₂O → 2H₂ + O₂In order to solve this problem we will need to convert moles of water to moles of oxygen. We will do that using the stoichiometric coefficients, as follows:
10.0 mol H₂O * [tex]\frac{1molO_2}{2molH_2O}[/tex] = 5.00 mol O₂Thus 5.00 moles of oxygen would be produced from 10.0 moles of water.
If one mole of an unknown substance is 200.59 g/mole, what is the mass of 0.33 moles of that substance?
Answer: 66.83g
Explanation: (200.59 g/mole = Hg)
0.33 moles = 66.83g
The chemical compound, "AB" has a molar mass of 74.548 g/mol.
What is the percent by mass of B in AB? (Mass of A = 39.098 g/mol,
B = 35.45 g/mol)
Answer:
47.55%
Explanation:
10 Look carefully at the picture. it shows an electron in the excited state on the left, and the
electron returning to its ground state on the right. When the electron return to the ground state it
emits
photon
excited state
ground state
a) blast of cold air
c) proton
b) electrostatic charge
d) photon (light)
How many atoms are in 4.5 g of AICI3?
Answer:
2.047 × 10^22 atoms.
Explanation:
To calculate the number of atoms (nA) in AlCl3, we first need to find the number of moles in the compound, AlCl3.
Molar mass of AlCl3 = 27 + 35.5(3)
= 27 + 106.5
= 133.5g/mol
Using mole = mass/molar mass
mole = 4.5/133.5
mole = 0.034moles
number of atoms in a substance (nA) = number of moles (n) × Avagadros number or constant (6.02 × 10^23 atoms)
nA of AlCl3 = 0.034 × 6.02 × 10^23
nA = 0.2047 × 10^23
nA = 2.047 × 10^22 atoms.
The molecules in a gas
Answer:
? which gas, explain further
Explanation:
Which has the largest ionization energy, platinum or nickel?
What do scientists think is responsible for this dramatic change in height? Cite evidence from the text to support your answer.
Answer:
Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
Explanation:
i might be right
Which situations will NOT increase the reactions rate of most chemical reactions?
Answer:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
Explanation:
Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants
What is the oxidation number for Ba?
A. +1
B. -2
C. +2
D. -1
Answer:
+2
Explanation:
Ba is present in group 2 and group 2 show + oxidation state
4 Na + O2 → 2 Na2O
6.79 moles of O2 will react to form how many moles of Na2O?
Answer:
13.94moles of Na₂O
Explanation:
The balanced reaction expression is given as:
4Na + O₂ → 2Na₂O
Given parameters:
Number of moles of O₂ = 6.97moles
Unknown:
Number of moles of Na₂O
Solution:
To solve this problem;
1 mole of O₂ will produce 2 moles of Na₂O ;
6.97 moles of O₂ will produce 6.97 x 2 = 13.94moles of Na₂O
Please help. Thank you:)
Many earthquakes occur along the edges of continents that surround the Pacific Ocean. This area is called the Pacific Ring of Fire. Why does this region have so many earthquak
O A. The water in the Pacific Ocean is very heavy and pushes down on the Earth.
O B. Landslides are common along the steep Pacific Ocean coastlines.
O C. Plate boundaries occur along the edges of the Pacific Ocean.
OD. Strong typhoons are common in the Pacific Ocean.
Answer:
c
Explanation:
the plate tectonics collide there a lot
Please answer 14 will give brainliest
Answer:
I think it's alkali metals
Answer:
[tex]its \: fluorine \: and \: it \: belongs \: to \ : \\ 17th \: family \: noble \: gases[/tex]
What animal did Darwin study in the Galapagos Islands?
1. Yellow fin tuna
2. Spiders
3. Hawks
4. Finches
Answer:
The answer is 4.
Explanation:
Finches.
Answer:
4. Finches
Darwin studied the forms of the beak, and found that they were different based on what they ate.
Something that is made out of natural resources for human use is called
Answer:
Man-made resources
Explanation:
Humanized resources are items or substances that have value to human lives that do not occur in the natural world. Examples of man-made resources include plastic, paper, soda, sheet metal, rubber and brass. These contrast with natural resources, such as water, crops, sunlight, crude oil, wood and gold.
how many moles are equivalent to 4.151 x 10^25 particles of lithium?
Answer:
68.95moles
Explanation:
Given parameters:
Number of particles of lithium = 4.151 x 10²⁵ particles
Unknown:
Number of moles = ?
Solution:
From the mole concepts, we know that;
6.02 x 10²³ particles are contained in 1 mole of a substance
4.151 x 10²⁵ particles contains [tex]\frac{4.151 x 10^{25} }{6.02 x 10^{23} }[/tex] = 68.95moles
balance the word equation then determine the sum of all coefficients.
Gallium metal reacts with chlorine gas to produce gallium chloride. The sum of all coefficients in the balanced equation is ____?
The sum of all coefficients = 7
Further explanationGiven
The word equation
Required
The sum of all coefficients
Solution
The chemical equation can be expressed in terms of:
word equation skeleton equation balanced equationConvert the word equation into a chemical equation(skeleton) :
Ga + Cl₂ → GaCl₃
Balanced equation
2Ga + 3Cl₂ → 2GaCl₃
The sum of all coefficients :
= 2+3+2
= 7
Lisa simpson decided that she would test whether her brother were smarter than a mouse she places a cupcake with a mouse can eat it the mouse find the food and eat it the next day list of places a cupcake in the same place but this time puts
7. Look at the graph in Figure 14.10 on page 420. What two observations did
Jacques Charles make about the behavior of gases from similar data?
Oxygen-16 and Hydrogen-1 Are they becoming positively or negatively charged ions to gain stability?
they are becoming negatively charged.
8. Which type of bond results when one or more valence
electrons are transferred from one atom to another?
A) a hydrogen bond
B) an ionic bond
C) a nonpolar covalent bond
D) a polar covalent bond
Answer:
B
Explanation:
You are a nurse giving a patient 0.75 cc per minute of a drug cocktail intravenously . A cc is 1ml of a solution . If the patient needs thr iv for 2 hours how many liters of this solution will you need to prepare
Answer:
90 mL
0.09 Liters
Explanation:
Givens
1 cc of solution = 1 mL
0.75 cc / min needed to go in intravenously.
2 hours needed.
? Liters
Solution
1 hour = 60 minutes
1 hours = 2 * 60 = 120 minutes
rate = 0.75 cc/minute
Liters = rate * time
Liters = 0.75 cc * 120 minutes
Liters = 90 cc
That's not the answer.
1 Liter has 1000 mL or ccs
x Liter has 90 mL
Equation
1/x = 1000 / 90
Solution
Cross multiply
1000x = 90*1 Divide by 1000
x = 90/1000
x = 0.09 Liters.
What type of energy is used to form a chemical bond?
Solar energy
Free energy
Stored energy
Heat energy
Heat energy
I thing it's that? ok will hope you have a good day :)
hello
look at pic and answer
Answer:
Situation 7, also thats funny you were playing nurses office. I like that song. Hope this helped!
how many
moles are in 9.01 x 1023 molecules of water. answer should be rounded to three significant figures.
A. 1.50
B. 15.0
C. 0.150
D. None of the above
Answer:
A. 1.50
Explanation:
9.01 x 1023 molecules* 1 mol/ 6.022×1023 molecules= 1.49618067087 moles
Rounded would be 1.50
2 points
Which group of elements loses electrons most easily?
8 (8A)
1(1A)
7 (7A)
2 (2A)
Answer:
7 (7A)
Explanation:
Need help plz!
-Which property describes a mixture?-
A. It cannot be separated by physical methods.
B. It has a single chemical composition.
C. It cannot have more than one state of matter.
D. It cannot be described by a chemical symbol or formula.
Answer:
D as a mixture is not a compound and it does not have it's own chemical formula
Explanation: Sauce me brainliest
It cannot be described by a chemical symbol or formula.
- Chilio
Why is quantum of energy important?
Answer/Explanation:
quantum of energy is important because the energy of a particle, and also how long it has had that energy, with infinite precision. Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. the term also applicable to quanta of other forms of electromagnetic energy such as X - rays and gamma rays.