Answer:
34 g of NH₃
Explanation:
What was Juno's destination?
A. Earth
B. Jupiter
C. Sun
D. Moon
Explanation:
Juno's primary goal is to reveal the story of Jupiter's formation and evolution. Using long-proven technologies on a spinning spacecraft placed in an elliptical polar orbit, Juno will observe Jupiter's gravity and magnetic fields, atmospheric dynamics and composition, and evolution.
Answer:
Jupiter.
Explanation:
a compound contains 32 grams of O for every 2.0 grams of H. What is the most likely molecular formula of this compound?
Answer:
H₂O₂
Explanation:
The molecular formula gives the exact number of atoms within a chemical compound.
In this problem:
Mass of O = 32g
Mass of H = 2g
Let us follow this methodical approach to solve the problem:
Elements O H
Mass 32 2
Molar mass 16 1
Number of moles 32/16 2/1
2 2
The molecular formula of the compound is H₂O₂
What is the mass of 4.80 mol of barium hydride, BaH2?
A. 4.80 g
B. 29.0 g
C. 139 g
D. 669 g
Answer:
mole=wt/M.wt
M.wBaH2→139.34g/mol
4.80=wt/139.34
wt=4.80×139.34
wt=668.8
wt≈669✓
According to mole concept, the mass of 4.80 mole of barium hydride is 669 g.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Number of moles is calculated as, mass/molar mass ,therefore on substitution mass=number of moles×molar mass
mass= 4.80×139.34=668.83 ≈669 g.
Therefore, the mass of 4.80 mole of barium hydride is 669 g.
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Ca(s) + O2(g) -
O A. Cao(s)
B. Ca2O(s)
O C. 2Ca(s) + O2(g)
O D. CaO2(s)
Answer:
bbbbnnnnnnnnnnnnnnn
Explanation:
How many moles of Al2O3 are formed from the reaction of 6.38 mol O2 and 9.15 mol Al?
With Explanation please !
Moles of Al₂O₃ formed : 1.42
Further explanationGiven
6.33 mol O₂
9.15 mol Al
Required
moles of Al₂O₃
Solution
Reaction
4Al + 3O₂ ⇒ 2Al₂O₃
Find limiting reactant (mol : coefficient) :
Al = 9.15 : 4 = 2.29
O = 6.38 : 3 = 2.13
O₂ as a limiting reactant(smaller ratio)
Mol Al₂O₃ based on mol O₂ as a limiting reactant
From equation, mol ratio Al : Al₂O₃ = 4 : 2, so mol Al₂O₃ :
= 2/3 x mol O₂
= 2/3 x 2.13
= 1.42
2. Solid ferric oxide reacts with carbon monoxide gas to produce solid iron and carbon
dioxide gas.
3. Solid lead reacts with aqueous silver (1) acetate to produce aqueous lead (II) acetate and
solid silver.
Can someone please help me on either 2 or 3. You don’t have to do both, but if you have time I would appreciate it so so much! Thanks in advance!!
Answer
Fe2O3+3CO→2Fe+3CO2.
Explanation:
Name an element with electrons in the f subshell.
Answer:
Gadolinium (Gd).......
What is the percent yield of ammonia if
the yield of ammonia is 15 g and you had
14 g of nitrogen to start with?
N2 + 3H2 → 2NH3
Answer:
Percent yield = 88.23%
Explanation:
Given data:
Percent yield of ammonia = ?
Actual yield = 15 g
Mass of nitrogen = 14 g
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Number of moles of nitrogen:
Number of moles = mass/molar mass
Number of moles = 14 g/ 28 g/mol
Number of moles = 0.5 mol
Now we will compare the moles of ammonia and nitrogen.
N₂ : NH₃
1 : 2
0.5 : 2/1×0.5 = 1 mol
Mass of ammonia/Theoretical yield
Mass = number of moles × molar mass
Mass = 1 mol × 17 g/mol
Mass = 17 g
Percent yield:
Percent yield = ( actual yield / theoretical yield )× 100
Percent yield = (15 g/ 17 g)× 100
Percent yield = 88.23%
using the perioduc table determine the mass of one mole in the element carbon
One mole of carbon atoms has a mass of exactly 12 g. Because magnesium atoms each have twice the mass of carbon atoms (24Mg compared with 12C), one mole of magnesium has a mass of 24 g. In fact, one mole of any element has a mass in grams that is equal to its relative atomic mass. One mole of iron has a mass of 56 g
You have now seen how nuclear fission can cause chain reactions. What particle is largely responsible for a chain reaction?
A) Proton
B) Neuton
C) Electron
D) Muon
The main function of the kidney bladder and ureter is-?
Answer:
The urinary system's function is to filter blood and create urine as a waste by-product. The organs of the urinary system include the kidneys, renal pelvis, ureters, bladder and urethra.
Explanation:
CH4 + 202 → CO2 + 2H2O
How many grams of O2 needed to produce 36 grams of H2O?
64 g O₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] CH₄ + 2O₂ → CO₂ + 2H₂O
[Given] 36 g H₂O
[Solve] x g O₂
Step 2: Identify Conversions
[RxN] 2 mol O₂ → 2 mol H₂O
[PT] Molar Mass of O - 16.00 g/mol
[PT] Molar Mas of H - 1.01 g/mol
Molar Mass of O₂ - 2(16.00) = 32.00 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Step 3: Stoichiometry
Set up conversion: [tex]\displaystyle 36 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})(\frac{2 \ mol \ O_2}{2 \ mol \ H_2O})(\frac{32.00 \ g \ O_2}{1 \ mol \ O_2})[/tex]Divide/Multiply [Cancel Units]: [tex]\displaystyle 63.929 \ g \ O_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
63.929 g O₂ ≈ 64 g O₂
Mass of O₂ needed = 64 g
Further explanationGiven
Reaction
CH₄ + 2O₂ → CO₂ + 2H₂O
36 grams of H₂O
Required
Mass of O₂ needed
Solution
mol H₂O :
= mass : MW H₂O
= 36 : 18 g/mol
= 2
From the equation, mol ratio of O₂ : H₂O = 2 : 2, so mol O₂=2
Mass O₂ :
= mol x MW O₂
= 2 x 32 g/mol
= 64 g
When bethany walks across a carpet her socks pick up many electric charges. Later in the day these charges are no longer present on her socks. What most likely happened to the charges?
Answer:
When bethany walks across a carpet, her socks pick up many electric charges. Later in the day, these charges are no longer present on her socks. What most likely happened to the charges.
A. the charges disappeared.
B. The charges switched signs
C. the charges transferred to another object ✓
D. The charges broke apart into smaller particles
how many moles are there in 9.86x10^25 molecules of co2?
Answer:
164moles
Explanation:
Given parameters:
Number of molecules of CO₂ = 9.86 x 10²⁵molecules
Unknown:
Number of moles = ?
Solution:
To solve this problem, a mole of any substance contains the Avogadro's number of particles.
In that;
6.02 x 10²³ molecules makes up 1 mole of a substance
9.86 x 10²⁵molecules contains [tex]\frac{9.86 x 10^{25} }{6.02 x 10^{23} }[/tex] = 1.64 x 10²moles
The number of moles is 164moles
A sample of iron (Fe) contains 2.10 x 1023 atoms. The mass of this sample of iron in grams is... (1 mol of atoms = 6.022 x 1023 atoms = 55.8 grams)
a.) 19.59
b.) 0.3499
c.) 1.17 x 10259
d.) 6.24 x 10-39
Answer:
Mass = 19.53 g
Explanation:
Given data:
Number of atoms of iron = 2.10 ×10²³ atoms
Mass of iron = ?
Solution:
The number 6.022 ×10²³ is called 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.
1 mole contain 6.022 ×10²³ atoms
2.10 × 10²³ atoms × 1 mol / 6.022 ×10²³ atoms
0.35 mol
Mass of iron atoms:
Mass = Number of moles × molar mass
Mass = 0.35 mol × 55.8 g/mol
Mass = 19.53 g
John is running the 1600-meter race at his school's track meet. He runs the full 1600
meters in 6.5 minutes. What is John's average speed in meters/second rounded to
the nearest tenth?
Answer:
4.1m/s
Explanation:
6.5min=6×60+30=390s
v=1600÷390=4.1m/s
John is running the 1600-meter race at his school's track meet. He runs the full 1600 meters in 6.5 minutes, then his average speed of John would be 4.1 meters per second.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.
As given in the problem, John is running the 1600-meter race at his school's track meet. He runs the full 1600 meters in 6.5 minutes,
The distance covered by the John = 1600 meters
The time taken by the John = 6.5 minutes
=6.5×60
=390 seconds
The speed of the John = 1600/390
= 4.1 meters per second
Thus,the speed of the John n meters/second rounded to the nearest tenth would be 4.1 meters per second.
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Will give brainliest for correct answer and quick answer! help ;w;
Which equation correctly represents the ionization process?
a. element + ionization energy --> ion+1 - 1 electron
b. element + ionization energy --> ion-1 + 1 electron
c. element + ionization energy --> ion+1 - 1 electron
d. element + ionization energy --> ion+1 + 1 electron
Answer:
c is correct answer my girl f
Which of the following has the greatest mass?
Select one:
a.They all have the same mass.
b.One mole of gold.
c.One mole of mercury.
d.One mole of barium.
Answer:
I guess one mole. of mercury
Explanation:
because mercury is denser
The one that has the greatest mass
c. One mole of mercury.How to find the greatest massTo determine which of the given options has the greatest mass, we need to compare the molar masses of the substances.
The molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol).
The molar masses of the given substances are:
Gold (Au): 197.0 g/mol
Mercury (Hg): 200.6 g/mol
Barium (Ba): 137.3 g/mol
Comparing the molar masses, we can see that one mole of mercury (Hg) has the greatest mass among the options provided.
Therefore, the correct answer is:
c. One mole of mercury.
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What are the coefficients when the chemical equation below is balanced?
___ FeS + ____ O2 = ___ Fe2O3 + ___ SO2
Select one:
a)1, 1, 1, 1
b)4, 6, 1, 2
c)4, 7, 2, 4
d)2, 3, 1, 2
Answer: c)4, 7, 2, 4
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.
In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.
The balanced chemical equation will be :
[tex]4FeS+7O_2\rightarrow 2Fe_2O_3+4SO_2[/tex]
The coefficients when the chemical equation below is balanced are 4, 7, 2, 4
Draw a Lewis electron-dot diagram of a Cl2 molecule
Answer:
Explanation:
this is what the Lewis electron-dot diagram of a Cl2 molecule looks like
Lewis electron diagram of a chlorine molecule is attached in the picture below.
What are Lewis electron diagram?Lewis dot structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .
They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.
They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.They are useful in predicting the structure.
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Elephants form a circle around a newborn elephant calf.
How does this behavior affect survival of the elephant population?
O A. It increases the chances that the adult elephants will find mates.
O B. It marks the territory so predators stay away from the elephants.
O C. It increases the chances the calf will live to reproduce.
OD. It communicates to the calf the best way to reproduce.
Answer:
C
Explanation:
Answer:
The answer is C
Explanation:
The older elephants are surrounding the calf to protect it and make sure it lives to reproduce.
how many moles are in 3 grams of Hydrogen gas.
Answer:
Number of moles = 1.5 mol
Explanation:
Given data:
Number of moles = ?
Mass in gram = 3 g
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of hydrogen gas = 2.02 g/mol
By putting values,
Number of moles = 3 g / 2.02 g/mol
Number of moles = 1.5 mol
Will give brainliest if you answer quickly and correctly :)
An atom X has 5 energy levels of electrons outside its nucleus and 74 neutrons inside its nucleus. Identify this atom
a. P
b. Ca
c. I
d. Cd
e. Fr
Answer:
C. I (iodine)
Explanation:
it would be Iodine because it has 5 energy levels of electrons and has a total of 74 neutrons inside its nucleus!
Hope this helps, have a good day!
how many liters is 1.9 mol of Cl2 at STP?
Answer:
V = 42.6 L
Explanation:
Given data:
Number of moles of Cl₂ = 1.9 mol
Temperature and pressure = standard
Volume occupy = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
By putting values,
1 atm × V = 1.9 mol ×0.0821 atm.L /mol.K × 273.15 k
V = 42.6 atm.L / 1 atm
V = 42.6 L
Help me with this please I need the answers ASAP
Answer:
1. Exothermic reaction
2. Is being released
3. The energy comes from the change in energy between reactants and products
Explanation:
The reaction is producing energy. A reaction that produce energy is called a Exothermic reaction.
As the energy is produced, the energy is being released.
As you can see in the image, the energy of the reactants is higher than the energy of the products. This change of energy in the chemicals produce the production of energy as heat.
In the formula for an ionic compound, the negative ion is
always written first.
TRUE
FALSE
Answer: False
Explanation: In the written form of an ionic compound, the positively charged cation always comes before the negatively charged anion. For instance, the written name for is calcium chloride because the compound has calcium () cations and chloride () anions.
In the formula for an ionic compound, the negative ion is always written first. This statement is false.
What do you mean by an ionic compound ?The term an ionic compound is defined as a chemical compound composed of ions carried together by electrostatic forces termed ionic bonding.
The compound is neutral charge, but made up of positively charged ions called cations and negatively charged ions called anions.
The compounds that affect a metal binding with either a non-metal or a semi-metal will display ionic bonding.
In the formula an ionic compound, the positively charged cation always comes before the negatively charged anion.
For example, the written name for is calcium chloride because the compound has calcium (+) cations and chloride (-) anions.
Thus, In the formula for an ionic compound, the positive ion is always written first.
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Is #11 balanced or unbalanced?
Answer:
its unbalanced
have a great day/night
Explanation:
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A hydroxide group (OH) is a component of most...
a. acids.
b. bases.
c. ionic compounds.
d. molecular compounds.
Answer: bases
Explanation:
True or False: Wind can cause ocean currents
Answer:
true
Explanation:
Answer:
True the wind causes waves in the ocean
Explanation:
18. Which factor does NOT affect weather?
O mountains
O phases of the moon
O cloud cover
O large bodies of water
