How many particles are in 0.645g of CaCl2
Answer:
~ 3.5 x 10^21
Explanation:
Mole weight of Ca Cl2 ( from periodic table ) = ~~ 111 gm
.645 gm / 111 gm / mole X 6.022 x 10^23 =
When would a transformation of chemical energy to electrical energy occur?(1 point)
when the current becomes zero
when a reaction produces the same products
when there is chemical reaction between metals and nonmetals
\
when electrons stop moving between atoms
A transformation of chemical energy to electrical energy occurs when there is a chemical reaction between metals and nonmetals.
What is electrical energy?The movement of electrons from one atom to another is what results in electrical energy.
A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.
Hence, option C is correct.
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1. write the formula for the following ionic compound: Calcium Carbonate
Answer:
CaCO3
Explanation:
The molecule is formed by the calcium cation Ca+2 and the carbonate anion CO3−2.
How would one convert 15 seconds to hours?
Answer:
A
Explanation:
15 sec * 1 hr/3600 sec (note how 'sec' cancels out and you are left with 'hour' in your answer) = 15/3600 hour
Answer:
answer d
Explanation:
Which of these is a benefit of nuclear fusion?
A. It creates lower temperatures than nuclear fission reactions.
B. There is a lower risk of runaway chain reactions. C. Containment is easier for nuclear fusion.
D. It is less technically challenging than nuclear fission reactions.
Answer:
B. There is a lower risk of runaway chain reactions.
Answer:
b
explanation:
Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.
hope this helps
Answer:
Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation and natural products for our use at no cost. Removal of the wetlands can result in fish disease, dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity and damage to infrastructure through corrosion. The loss of the wetlands introduces invasive species, either intentionally or unintentionally, these species can put pressure on native plants and eventually push them out of their native habitat.
Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation, and natural products for our use at no cost.
Removal of the wetlands can result in fish disease, the dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity, and damage to infrastructure through corrosion.
How are the wetlands being destroyed?
In the last three decades alone, nearly one-third of natural wetlands have been lost to urbanization, agriculture expansion, and pollution. The loss of wetlands in urban areas has been more rapid.
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Br2 + NaCl → NaBr + Cl2
Answer:
NaBr is a reducing agent, Cl 2 is an oxidizing agent. ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
Explanation:hope its help
If 50.2 g of NO and 15.1 g of H2 react, what is the largest amount of ammonia that can be formed?
WILL GIVE POINTS IF HAS EXPLANATION!
Answer:
28.5 g NH₃
Explanation:
You can determine how much ammonia will form by identifying which reactant is the limiting reagent. This can be done by converting each reactant into moles, using the mole-to-mole ratio (after balancing the reaction), then converting ammonia to grams.
2 NO + 3 H₂ --> 2 NH₃ + O₂
Molar Mass (NO) = 14.01 + 16.00 = 30.01 g/mol
Molar Mass (H₂) = 2(1.008) = 2.016 g/mol
Molar Mass (NH₃) = 14.01 + 3 (1.008) = 17.034 g/mol
50.2 g NO 1 mol 2 mol NH₃ 17.034 g
---------------- x --------------- x -------------------- x ---------------- = 28.5 g NH₃
30.01 g 2 mol NO 1 mol
15.1 g H₂ 1 mol 2 mol NH₃ 17.034 g
---------------- x --------------- x -------------------- x ---------------- = 85.1 g NH₃
2.016 g 3 mol H₂ 1 mol
Nitrogen oxide (NO) is the limiting reagent because it produces the smallest amount of product. In other words, it runs out before all of the hydrogen gas (H₂) can be used. This means that the largest amount of ammonia that can be produced is 28.5 grams.
How many atoms is 2.34 moles of titanium?
[tex]1.409 \times {10}^{24} \: \: atoms[/tex]
Explanation:
Convert from moles to atoms:
2.34 mol titanium (Ti)
Determine the amount of substance, n:
n = 2.34 mol
Look up Avogadro's constant, [tex] N_A[/tex] , to find the number of atoms in a mole:
[tex] N_A[/tex] = 6.022×10^23 atoms/mol
Multiply n by [tex] N_A[/tex] to convert to the number of atoms, [tex]N_{atoms}[/tex]:
Precise Answer:
[tex] N_{atoms} [/tex] = n× [tex] N_A [/tex]= (2.34 mol)/1×(6.022×10^23 atoms)/(1 mol) = 1.409×10^24 atoms
how the surface of the early Earth and its atmosphere have changed to
form the surface of the Earth and its atmosphere today,
Answer:
As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes.
Explanation:
Bond polarity of Si and H
Answer:
Si 1.90
H 2.20
Explanation:good luck
I will mark brainliest
Answer:
a b c are correct and rest of other are incorrect
Formula for dinitrogen monoxide
Answer:
the formula is N₂O
Explanation:
Look at the images below. Which model is the correct organization of an atomic model of an element?
A
B
C
???
Answer:
in this model is the correct organization of an atomic model of an element is C
Need help solving this want to know either A or B
draw a condensed structure of each of the following
1. 1,2,-propanediol
2. Ethyl methyl ether
3. Dichloromethane
The condensed structure of given compounds are shown in the below image.
What is functional group?Functional group is the specific group which is present in an organic compound gives information about the properties of that compound.
In 1,2-propanediol compound hydroxyl functional group is present on the 1st and 2nd position.In Ethyl methyl ether, ether functional group is present.In Dichloromethane, two atoms of chlorine groups are present.Hence, structure of the given compounds are shown in the below image.
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Which is a possible heat capacity for a bomb calorimeter?
A) 11.20 kJ/°C
B) 14.21 kJ/(kg°C)
C) 15.32 kJ/mol
D) 15.75 kJ/g
Use the name to write the formula for the following ionic compound: scandium (III) hydroxide
Use the name to write the formula for the following ionic compound: titanium (IV) cyanide
Answer:
.
Explanation:
.
What is carbon's number of neutron,proton,atomic number,mass number
No. of Neutrons: 6
No. of Protons: 6
Atomic number: 6
Mass No: 12.011 u
The u means atomic mass unit.
Answer:
Everything is 6 except for mass number
Explanation:
neutron is 6
proton number is 6
atomic number is 6
mass number is 12.011 atomic mass units
What compound releases chlorine or bromine in the stratosphere, threatening the ozone layer?
Answer:
Halocarbons.
Explanation:
Atmospheric measurements have clearly corroborated theoretical studies showing that chlorine and bromine released from halocarbons in the stratosphere react with and destroy ozone.
A path along which electric charges flow is called
a?
Answer:
its an electric circuit
Explanation:
is a pathway in which current flows through.
__N2O5+__H2O->__HNO3
What's the reaction?
Answer:
N₂O₅ + H₂O --> 2HNO₃
This reaction is a combination reaction
Explanation:
I find that making a table is an easy way to balance a table. The table would be something like this:
Reactants (left) Products (right)
N = 2 N = 1
O = 6 O = 3
H = 2 H = 1
The number next the symbol represents how many of atoms of that particular element are present.
The aim is to make the number of atoms of each element on the left side to be equal to the number of atoms of each element on the right side. As we can see, there are 1 more nitrogen than on the right, 3 more oxygen than on the right and 1 more hydrogen than on the left.
So to make the numbers of atoms of each element on right equal to the number of atoms of each element on the left, we have to add a number. This number CANNOT be a subscript number because that would change the reaction.
We can add a 2 in front of the product (this is because there are less atoms in the right side of the equation).
N₂O₅ + H₂O --> 2HNO₃
This means there are now two HNO₃ molecules so every atom in this molecule is basically multiplied by 2. So 1 nitrogen atom becomes two (1 × 2 = 2), 3 oxygen atoms become 6 (3 × 2 = 6) and 1 hydrogen atom becomes 2 (1 × 2 = 2). If we were to make a table again with the following equation - N₂O₅ + H₂O --> 2HNO₃, the table would be as so:
Reactants (left) Products (right)
N = 2 N = 2
O = 6 O = 6
H = 2 H = 2
Now the equation is balanced as we can see the number each type of atom is the same on the right and left side.
1. Which creates a potential difference in an electric circuit
a voltage source
electric charges
a current source
a difference in height
Plese help me I need the answer right now
Answer:
voltage source
Explanation:
establishes an electric potential difference across the two ends of the external circuit and thus causes the charge to flow. The voltage source is the numerical value of this electric potential difference.
What volume is occupied by 20.6g of methane, CH4 at 27°C and 1.59 atm?
Please show work :)
What is the molar mass of MgSO4?
Answer:
120.3676 g/mol
Science!
The pressure on 2.50L of N2O changes from 1 atm to 0.4 atm. What is the new volume?
Answer:
6.25 L
Explanation:
Boyle's law says Pressure and volume are inversely related. One goes up and other goes down (vice versa).
P1 V1 = P2 V2
(2.5) (1) = (0.4) (x)
x= 6.25 L
The answer should make sense because your pressure went from high to low which means your volume should opposite, from low to high, and that's what we see.
what is the correct answer for box c?
yields
products
subscript
coefficient
reactants
Look at the following atom:
How many protons does this Beryllium have?
How many neutrons does this Beryllium have?
How many electrons does this Beryllium have?
Answer:
p= 4
e=4
n=5
Explanation:
Which of the following describes how further studies supported the work done by Ernest Rutherford?
A. Max Planck formulated the Planck's constant.
B. Albert Einstein formulated the energy equation.
C. James Chadwick discovered neutral particles in the nucleus.
D. Joseph Proust stated that each compound has a fixed ratio of elements.
Answer:
c) James Chadwick discovered neutral particles in the nucleus
Explanation:
James Chadwick discovery of neutral particles in the nucleus best describes the further studies supported the work done by Ernest Rutherford. Hence, option (c) is the correct answer.
need helpppppppppppppppppppppppppp with 3
Answer:
13. 8 hrs
12. 8.89 meters per second squared
11. -0.75 meters per second squared