Answer:
C. 0.001 second
Explanation:
Millisecond is a subunit of a second.
Milli depicts a unit to the power of 10⁻³
So;
1 millisecond = 10⁻³ s
Therefore,
1 x 10⁻³ = 0.001s
The solution to this problem is choice C which is 0.001 second
Which horizon would have the highest amount of organic material?
A horizon
B horizon
C horizon
O horizon
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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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
Which of the following can effect the resistance of a wire?
I. the length of a wire
II. the thickness of a wire
III. the temperature of a wire
I and II
I and III
II and III
I, II, and III
Answer:
l and lll
Explanation:
The longer the wire, the more resistance that there will be and heating a metal conductor makes it more difficult for electricity to flow through it.
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
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!
A hydroxide group (OH) is a component of most...
a. acids.
b. bases.
c. ionic compounds.
d. molecular compounds.
Answer: bases
Explanation:
Is #11 balanced or unbalanced?
Answer:
its unbalanced
have a great day/night
Explanation:
please mark brainlest
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
Ca(s) + O2(g) -
O A. Cao(s)
B. Ca2O(s)
O C. 2Ca(s) + O2(g)
O D. CaO2(s)
Answer:
bbbbnnnnnnnnnnnnnnn
Explanation:
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:
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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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 micrometers are in 1.25 miles?
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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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:
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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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
16. Two identical beakers containing water, which have not yet been placed in the sun, are shown below. х Y If both beakers are placed outside, in the sun, for the same amount of time, what effect will the sun have on the water in each beaker? A The water in beaker Y will heat faster because the volume of the water is greater. B. The water in beaker Y will heat faster because the density of the water is greater. C. The water in beaker X will heat faster because the density of the water is lower. D. The water in beaker X will heat faster because the volume of the water is lower. Please help
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
True or false: Forces occur in pairs action and reaction when a moving ball collides (action) into a stationary One, both move (Reaction
(newton's third law of motion)
Answer:
true?
Explanation:
When a moving ball collides with a stationary ball then the forces act in action and reaction pairs according to Newton's 3rd law. Therefore, the given statement is true.
What is Newton's third law?According to Newton's third law of motion, when two objects interact, they exert force on each other, and these forces are called action and reaction pairs.
Force can be defined as a push or pull acting on a body resulting in its interaction with another body. Force can be defined as a result of an interaction and is classified into two categories: contact force and non-contact force.
Newton’s third law of motion states that when the first object exerts a force on the second object, the first object experiences a force with the same magnitude in the opposite direction of the exerted force.
When a moving ball collides with a stationary ball as the moving ball collides it exerts a force on the stationary ball in reaction the stationary ball exerts an equal force on the moving ball but in opposite direction.
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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
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
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%
what layer is the asthenosphere?
(in number order) ex: layer *number*
Answer:
Mantle
Explanation:
Asthenosphere, zone of Earth's mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere. The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth's surface.
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
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.
1.
Four wooden blocks with masses of 2 kg, 5 kg, 7 kg, and 9 kg are placed on a table.
According to Newton's first law, which block will have the least inertia?
A The block with a mass of 2 kg
B The block with a mass of 5 kg
C The block with a mass of 7 kg
D The block with a mass of 9 kg
Given that,
Four wooden blocks with masses of 2 kg, 5 kg, 7 kg, and 9 kg are placed on a table.
To find,
The block will have the least inertia.
Solution,
Inertia is the measure of mass of a body. It is directly proportional to the mass of the body.
The body having more mass will have more inertia. Out of four masses 9 kg block will have more inertia and 2 kg block will have least inertia.
Hence, the correct option is (a) " The block with a mass of 2 kg "
The wooden block of mass 2kg will have the least inertia.
The inertia of an object:The inertia of an object is defined as the property due to which an object continues in the existing state of rest or uniform motion in a straight line unless an external force is applied.
The inertia of an object is directly proportional to the mass of the object. Havier the object, it will be more resistant to any change in its state of motion or rest.
if we consider the same amount of force applied to all the wooden blocks of masses 2kg, 5kg, 7kg, and 9kg, it will be easiest to move the 2kg block and hardest to move the 9 kg block.
So, the block of mass 2kg has the least inertia while the block of mass 9kg has the maximum inertia among the given blocks.
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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
True or False: Wind can cause ocean currents
Answer:
true
Explanation:
Answer:
True the wind causes waves in the ocean
Explanation:
