The question is incomplete, the complete question is;
The lightest particle among the following is:
• Electron •Proton • Neutron • Alpha
Answer:
Electron
Explanation:
There three basic subatomic particles are electrons, protons and neutrons. Both protons and neutrons are found in the nuclear and both contribute towards the mass of the atom. The alpha particle has the same mass as the helium nucleus.
However, the electrons are found in orbiit and have a negligible mass compared to the mass of the protons and neutrons. The mass of the electron is about 9.11 × 10^-31 Kg. This makes it the lightest of all the particles listed among the options.
a sample of silver has a volume of 6 cm^3 and a massage of 36 grams what's the samples density
Answer:
6g/cm³
Explanation:
Density of a substance can be calculated as follows:
Density = mass (g)/volume (cm³)
According to this question, a sample of silver has a volume of 6 cm³ and a mass of of 36g. The density will be
Density = 36/6
Density = 6g/cm³
Nitrogen and sulfur oxide gases originate from all of the following, EXCEPT
A . lightening Strikes
B. Volcano eruptions
C. Car exhaust
D . Plant Respiration ANSWER IT FOR 50 PIONTS!!!!!!!!!!!!!
Answer:
the answer is D (つ°ヮ°)つ （＾ω＾）
Is salt pure or impure
Answer:
pure
Explanation:
because there no additional substance
Why would the electrolysis reaction stop if the battery was removed
If the battery was removed, the energy produced by the battery would not be able to continue its path along the circuit.
What does every weak base have?
has a Acids Bases
HCl LiOH
HBr NaOH
HI KOH
HNO 3
Identify all of the gas law equations that relate to the ideal gas law.
**Check for the proof photo at the bottom.**
**Answers are in bold.**
__________________________________________________________
Answers on the left:Identify all of the gas law equations that relate to the ideal gas law.
3. V₁/T₁=V₂/T₂
4. V₁/n₁=V₂/n₂
5. P₁V₁=P₂V₂
7. P₁/T₁=P₂/T₂
__________________________________________________________
Answers on the right:A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L. Answer the questions and round answers to nearest hundredth place. Which equation should you use to find the amount of gas added?
B. n₂=V₂n₁/V₁
What is the final number of moles?
0.08 mol
__________________________________________________________
Explanation:The ideal gas law is Boyle's law, Charles's law, Gay-Lussac's law, and Avogadro's law combined into one equation. Avogadro's law is V₁/N₁=V₂/N₂, Charles's law is V₁/T₁=V₂/T₂, Gay-Lussac's law is P₁/T₁=P₂/T₂, and Boyle's law is P₁V₁=P₂V₂.
For the balloon problem, B is the correct answer because we are looking for the final moles of gas added. Answer B gives the equation that equals n₂, n₂ means final number of moles. The problem gives us initial volume (500 mL), final volume (1 L), and initial moles amount (0.04 mol). Plug these numbers into the equation, n₂=V₂n₁/V₁, using consistent units. Note that V₁=initial volume, V₂=final volume, n₁=initial moles, and n₂=final moles
Here's a photo of Edge just incase.
How many significant digits are in the value 0.0050340?
Answer:
6
Explanation:
6, because the number after decimals are considered significant but the 0 after the last number is not significant.
A compound being used in experimental medicine is 78.14% boron (B) and 21.86% hydrogen (H). The empirical formula of the compound will have a boron to hydrogen ratio of
Explanation:
hope the picture above help u understand :)
Take two samples, one is oil and other is water. Mix the two. You observe that?
Answer:
Explanation:mckxmmxkmsskkskskskxisisisisisisisks
Use the activity series below to predict whether the following reactions will take place.
Answer:
first one is yes, second one is no
Explanation:
edge
What are two examples of mechanical waves?
• Radio
• Water
• Light
•Sound
Answer:
radio and sound
Explanation:
Because they are waves in motion
Susan was frantic: the small diamond had disappeared from her wedding ring! It had been there this morning, before she made breakfast, so now she was ransacking the kitchen. She searched the dirty, soapy dishwater in the sink. She rummaged through the fridge, overturning a carton of milk, a bottle of sweetened orange juice, a container of potato salad and a jug of pumpkin soup. Then it was the pantry's turn. She examined the bottle of vinegar, the sugar bowl and all of the baking supplies, releasing a cloud of flour into the air. She even emptied the salt shaker onto the bench and pawed through the salt in search of the diamond. As she slumped to the concrete floor in despair, surrounded by a complete mess, she finally saw it – glittering in the dog's water bowl. Identify five mixtures mentioned in the stor
Answer:
No. 1 Susan was Frantic
No.2 panicked
No.3 determined
No.4 Despair
No.5 Releif
I really hope this helps, Good luck! :D
How many moles of aluminum are in this aluminum can? Answer: ____________ (25 pts) Calculate the number of aluminum atoms in this can. Answer: _______________ (25 pts) The Amount of Aluminum is 12.69g
Answer:a)No of moles of Aluminium=0.4703
b)number of aluminum atoms=2.832 x 10^23 atoms
Explanation:
a)Given that The Amount/ Mass of Aluminum is 12.69g
We know that
No of moles =Mass/ Molar mass
Molar mass of Aluminium, Al is 26.982 g/mol
No of moles =12.69g/26.982 g/mol
No of moles =0.4703
Also
b) 1 mole of aluminium must contain 6.022 x 10^23 atoms of aluminium
which is known as Avogadro's constant.
Therefore, 0.4703 moles will contain 0.4703 x 6.022 x 10^23 atoms =2.832 x 10^23 atoms
Use the reaction N2(g) + 3H2(g) 2NH3(g) to answer the following questions
a. 1 pt: What does Le Châtelier's principle predict would happen to the equilibrium conditions if N2(g) + 3H2(g) were added to the system?
b. 1 pt: What would happen to the equilibrium if the pressure were decreased?
c. 2 pts: Write the equation for calculating Keq
d. 3 pts: Calculate the value for Keq given the following concentrations
[NH3] = 6 M
[H2] = 4 M
[N2] = 3 M
Answer:
Explanation:
a ) If N₂(g) and 3H₂(g) is added to the system , 2 moles of additional ammonia will be produced .
b ) If pressure is decreased , less amount of ammonia will be formed, because forward reaction reduces the pressure. So, reaction will take place in reverse direction.
c ) Keq = [ NH₃ ] ² / [ N₂ ] [ H₂]³
d ) Substituting the given values in the equation ,
Keq = [ 6M ] ² / [ 3M] [ 4M]³
= 36 / 3 x 64 M⁻²
= 18.75 x 10⁻² M⁻² .
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? Molecules in both the metal and the surrounding air will start moving at lower speeds. Molecules in both the metal and the surrounding air will start moving at higher speeds. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
last option is correct.
Air molecules surrounding the metal will speed up and metal molecules will slow down
Explanation:
the metal cools when placed in room temperature air which causes surrounding air to heat up.
the speed of molecules slow down for any material which cools and molecules speed increases when any material heats up
4Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)
A. What is the oxidation number for each item in this equation?
B. What is being oxidized?
C. What is being reduced?
D. What is the oxidizing agent?
E. What is the reducing agent?
Explanation:
The number acquired by an element after the lose or gain of an electron is called oxidation number.
For example, [tex]4Fe(s) + 3O_{2}(g) \rightarrow 2Fe_{2}O_{3}(s)[/tex]
Here, oxidation number of Fe(s) is 0 and Fe in [tex]Fe_{2}O_{3}[/tex] is +3.
Oxidation number of O in [tex]O_{2}(g)[/tex] is 0 as it is present in its elemental state.
The oxidation number of O in [tex]Fe_{2}O_{3}[/tex] is calculated as follows.
[tex]2(3) + 3x = 0\\6 + 3x = 0\\x = \frac{-6}{3}\\= -2[/tex]
Hence, oxidation number of O in [tex]Fe_{2}O_{3}[/tex] is -2.
The loss of electrons by an element or substance is called oxidation. Here, electrons are being lost by Fe(s) as an increase in oxidation state is occurring. So, Fe(s) is oxidized.The gain of electrons by an element or substance is called reduction. Here, electrons are being added to [tex]O_{2}[/tex] as a decrease in its oxidation state is occurring. So, [tex]O_{2}[/tex] is reduced.An element or compound which is being reduced is called oxidizing agent. Here, [tex]O_{2}[/tex] is the oxidizing agent.An element or compound which is being oxidized is called reducing agent. Here, Fe(s) is the reducing agent.A student wrote a chemical equation as shown.
2H₂S+ 302 H₂O + SO₂
What should the student do to balance the equation?
Answer: The student must add 2 infront of both [tex]H_2O[/tex] and [tex]SO_2[/tex] to make the equation balanced.
Explanation:
A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.
For the given unbalanced chemical equation:
[tex]2H_2S+3O_2\rightarrow H_2O+SO_2[/tex]
On the reactant side:
Atoms of H = 4
Atoms of S = 2
Atoms of O = 6
On the product side:
Atoms of H = 2
Atoms of S = 1
Atoms of O = 3
To balance the equation, a student must balance the atoms by adding 2 infront of both [tex]H_2O[/tex] and [tex]SO_2[/tex]
For the balanced chemical equation:
[tex]2H_2S+3O_2\rightarrow 2H_2O+2SO_2[/tex]
Using the following balanced equation, if you had 48 molecules of O2,
how many molecules of SO3 would you produce?
S8 + 12O2 --> 8SO3
Explanation:
hope this helps u understand:)
PLEASE HELP WILL GIVE LOTS OF POINTS!!!!!!!!!!!! What is the daughter particle if Uranium -234 undergoes beta decay? Write your answer in isotopic notation.
Answer:
Given nuclide is uranium-234.
If it undergoes beta decay then, what will be the daughter particle?
Explanation:
The beta particle decay increases the atomic number of the nuclide by one.
There is no change in the mass number of the nuclide.
The decay of beta particle from Uranium-234 is shown below:
It forms Np-93.
are there other universes ??
Answer:
Some theories say that there is only one universe and that everything is inside the universe and there is nothing outside the universe but some other theories say that there are more Universes which has the opposite copy of all the planets in our universe.
A gas has a volume of 1000.0 mL at a temperature of 20.OK and a pressure
of 1.0 atm. What will be the new volume when the temperature is changed
to 40.0K and the pressure is changed to
0.5 atm?
Answer:
4000mL
Explanation:
Using the combined gas law equation as follows:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information given in this question:
V1 = 1000mL
T1 = 20K
P1 = 1.0atm
V2 = ?
P2 = 0.5atm
T2 = 40K
Using P1V1/T1 = P2V2/T2
1 × 1000/20 = 0.5 × V2/40
1000/20 = 0.5V2/40
50 = 0.5V2/40
50 × 40 = 0.5V2
2000 = 0.5V2
V2 = 2000/0.5
V2 = 4000mL
A block is pulled 0.90 m to the right in 2.4 s. What is the block's average speed to the nearest hundredths of a m/s?
need answers as quickly aspossible. thank you
Answer: The empirical formula of the compound becomes [tex]TiCl_5[/tex]
Explanation:
The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.
Given values:
Mass of Ti = 0.72 g
Mass of Cl = 2.85 g
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
To formulate the empirical formula, we need to follow some steps:
Step 1: Converting the given masses into moles.Molar mass of Ti = 47.9 g/mol
Molar mass of Cl = 35.6 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of Ti}=\frac{0.72g}{47.9g/mol}=0.015 mol[/tex]
[tex]\text{Moles of Cl}=\frac{2.85g}{35.6g/mol}=0.080 mol[/tex]
Step 2: Calculating the mole ratio of the given elements.Calculating the mole fraction of each element by dividing the calculated moles by the least calculated number of moles that is 0.015 moles
[tex]\text{Mole fraction of Ti}=\frac{0.015}{0.015}=1[/tex]
[tex]\text{Mole fraction of Cl}=\frac{0.080}{0.015}=5.33\approx 5[/tex]
Step 3: Taking the mole ratio as their subscripts.The ratio of Ti : Cl = 1 : 5
Hence, the empirical formula of the compound becomes [tex]Ti_1Cl_5=TiCl_5[/tex]
The word habitable is defined as:
An electric kettle draws a current of 6.50 A while it is plugged into a 120-V
electrical outlet. What power does the kettle use?
Answer:
780 watts
Explanation:
formula to find power when given amps and voltage
P = A x V
=6.50a x 120V
= 780 W (watts)
Let's start by figuring out the amount in miles. From there, we can easily find the equivalent mass. Which equation do we need to find out how many moles of NH4Cl would there be in 500 mL of a 0.300 M solution of it?
A. n=C x V
B. C=V x n
C. C=n x V
D. n=C / V
Answer:
A. n= C x V
Explanation:
Molarity of a solution is the molar concentration of that solution. It can be calculated using the formula:
M = n/V
Where;
M = molarity (M)
n = number of moles (n)
V = volume (mL)
To calculate the number of moles from a given molarity value and volume, we say:
n = M × V
For this case of NH4Cl;
V = 500mL = 500/1000 = 0.5L
M = 0.300 M
n = 0.300 × 0.5
n = 0.15moles
Answer: n=CxV
Explanation:
Please help ………………….
Answer:
magnsium po
Explanation:
Use the reaction N2(g) + 3H2(g) 2NH3(g) to answer the following questions
a. 1 pt: What does Le Châtelier's principle predict would happen to the equilibrium conditions if N2(g) + 3H2(g) were added to the system?
b. 1 pt: What would happen to the equilibrium if the pressure were decreased?
c. 2 pts: Write the equation for calculating Keq
d. 3 pts: Calculate the value for Keq given the following concentrations
[NH3] = 6 M
[H2] = 4 M
[N2] = 3 M
Answer:
cvbn
Explanation:
I need some help
3KOH + FeCl3 → Fe(OH)3 + 3KCl
How many moles of FeCl3 are needed to completely react with 3.0 g of KOH?
Answer:
0.0178
Explanation:
because you can work out the amount of moles in KOH using moles = mass/mr.
The mr of the KOH is 39.1+16+1=56.1 so you do
[tex] \frac{3}{56.1} [/tex]
which equals to 0.053475 so u 3SF which is 0.0535moles
than u uses the molar ratio which is 3 to 1
so 0.0535÷3=0.0178 which is the moles of FeCl3.
hope this make sense:)
Part C
For each source of energy, describe its strengths and weaknesses with respect to the ideal source you described in part A. Do Internet research, as needed, to describe each energy source.
Question 1
Describe at least two advantages and two disadvantages of using natural gas as a source of energy.
Answer:
See explanation
Explanation:
Natural gas is mined along with crude oil in many oil wells. It has the advantage of being a cheap fossil fuels which is easily obtainable.
Generally, natural gas is the cleanest of all the fossil fuels. This means that it is the fossil fuel that least contributes to environmental pollution.
On the other hand; natural gas produces some amount of sulphur as it is burnt and mercury as particulate matter. These substances are quite dangerous to health.
Secondly, the combustion of natural gas leads to the production of the oxides of nitrogen which play a key role in the occurrence of photochemical smog.
