Answer:
9.9 moles
Explanation:
What we know:
P = 2.3 atm V = 120 L
R= .0821 L atm/K mol T= 340 K
What we're looking for: n = ?
2.3 atm ( 120 L) = n (.0821 L atm/K mol) (340 K)
2.3 ( 120 ) = n (.0821 / mol) (340)
276 = n (27.914 / mol )
9.9 = n / mol
9.9 mol = n
Sorry, I have another question! Please answer as soon as possible:)
Answer:
I think its b
Explanation:
Sorry if wrong! Hope this helps tho! maybe mark me brainliest if I am?
Use the periodic table to write the electron configuration of gallium (Ga).
Drag the labels to the correct locations on the image. Each label can be used more than once.
Answer:
Explanation: It’s the correct answer on Edmentum.
Using dimensional analysis, how many kilometers are there in 34 inches?
Answer:
There are many ways to figuring this out: you could use a ruler, a calculator or scrap paper.
Explanation:
This is not an actual flat out answer, but it’s helpful methods to getting the answer the next time you are stuck. Hope you are having a nice day. Bless your heart and soul.
What is the advantage of having valves in the
veins? What is the advantage of having valves in the veins
Help! I am in a hurry! Will get brainliest if correct!
Answer:
nonmetel
Explanation:
Answer:
Its a non-metal
Explanation:
Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite). Non-metals can be gaseous, liquids or solids.
Calculate the average atomic mass of element Q, if the isotopic composition of element Q is as follows: Q-107 has an abundance of 78%, and Q-110 has an abundance of 22%. Type your answer rounded to two decimal places.
Answer:
5
Explanation:
GIVING BRAINLY, FOLLOW, 5 STARS AND HEARTS
which of the following is NOT a characteristic of hot water heating systems?
Answer:
The one on the top,'' As the water cool, it is returned to the boiler where it is heated,''
Explanation:
Element X reacts with chlorine to form an ionic compound that has the formula XCl₂. To which group on the Periodic Table could element X belong?
Answer:
Group 2 is the correct answer.
Explanation:
Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2.
Which family of elements has six electrons in d-type orbitals?
Answer: Selenium is a member of the sulfur family with elements including tellurium and polonium. This family has six electrons in the outermost shell. Selenium specifically has an electron configuration of 2-8-18-6. The six electrons in the outermost shell allow selenium to have a variety of valence numbers.
Explanation:
Which is a Chemical Property of copper? reacts in air to form a green layer is a lustrous brown color is a solid at room temperature has a boiling point of 2567 degrees
Answer:
reacts in air to form a green layer
Explanation:
Properties of substances can be physical or chemical. A physical property is that which does not affect the chemical composition of the substance(s) involved e.g melting point, boiling point, color, state of matter as depicted for copper (Cu) in this question.
On the other hand, chemical property of a substance are those properties that alters or affects the chemical composition of the substance. In other words, they are features that can be observed after the substance has undergone a chemical reaction. In this question, COPPER REACTING IN AIR TO FORM A GREEN LAYER IS A TYPE OF CHEMICAL PROPERTY because a chemical reaction has occured with the evidence of the green layer formation.
1 You place a 28.95-g piece of gold in a 10-ml graduated cylinder. The level of the water rises 1.50 mL. What is the density of gold?
Answer:
What mass of silver will raise the level of the water in the graduated cylinder 1.50 mL? (Ans) 28.95 g / 1.50 mL = 19.3 g/mL (The gold's density)
19.3 gm/ml³ is the density of gold .
What do you mean by the density of the substance?Density, mass of a unit volume of a material substance. Density of a substance tells how close the particles of a substance are packed.
The formula for density is D = M/V, where d is density, M is mass, and V is volume.
Density is commonly expressed in units of grams per cubic centimeter.
The SI unit of density is kilogram per cubic meter (kg/m3).
It is also represented in the c g s unit of grams per cubic centimeter (g/cm3).
To calculate density of gold (here):
Given,
Mass of gold=28.95 gm
Volume of water=1.50 mL
Density=?
Density =Mass/Volume
Density=28.95/1.50
Density=19.3 gm/ml³
Hence, 19.3 gm/ml³ is the density of gold .
Learn more about density ,here:
https://brainly.com/question/15164682
#SPJ5
What is the formula for mass number?
Answer:
the formula for mass number is "mass number = protons + neutrons".
I will pick the brainiest answer! Thanks! :)
1. What is volume displacement? Why would you use this method?
2. What is density? What happens to things that are denser? What happens if they are less dense?
Answer:
1. The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid or to that fraction of the volume below the surface of an object partially submerged in a liquid. The weight of the displaced portion of the fluid is equivalent to the magnitude of the buoyant force.
Why would you use this method?
So it can be used to accurately measure the volume of the human body and other oddly shaped objects by measuring the volume of fluid displaced when the object is submerged.
2. Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
What happens to things that are denser?
Students should realize that if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float.
What happens if they are less dense?
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
The volume of a fixed sample of a gas is 150 mL at 25°C , at what temperature will its volume increase to 350 mL ?
Answer:
it is 52.7
Explanation:
so when it is 30 the degree is 5°
when it is 60, the degree is 10°
when it is 90, the degree is 15° and so on...
Answer:
T₂ = 695.33 K
Explanation:
Given data:
Initial volume = 150 mL
Initial temperature = 25°C (25+273 = 298 K)
Final temperature = ?
Final volume = 350 mL
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
T₂ = V₂T₁ /V₁
T₂ = 350 mL × 298 K / 150 mL
T₂ = 104300 mL.K / 150 mL
T₂ = 695.33 K
WILL GIVE POINTS AND BRAINLIEST
Question:
Number of H− ions in 5.22 g of SrH2
Answer:
moles H = 2 x 0.0649=0.130
ions = 0.130 x 6.02 x 10^23=7.81 x 10^22
Explanation:
HELP!
A. W
B. X
C. Y
D. Z
Answer:
B
Explanation:
1. Calculate the frequency and energy of a light wave with wavelength 30 m.
Answer:
10000000
Explanation:
Use wave equation: c=frequency * wavelength
c=3.00*10^8 m/s
Thus,
[tex]\frac{3.00*10^{8} }{30}[/tex]=10000000
A solid is held in shape by strong forces.
Ok thanks for the valuble info.
The diagram below shows what happens to an atom of uranium-235 when bombarded by a neutron. Which isotope is represented by X in the diagram?
Answer:
X represents barium - 141 nucleus.
Written as: (141, 56) Ba
Explanation:
In nuclear fission reaction, due to the fact that the process produces more neutrons, a nuclear chain reaction can possibly occurr. Now, a chain reaction is a one whereby the material that begins the reaction will also be one of the products and it can start another reaction.
Now, for the nuclear chain reaction for the fission of uranium-235, its nucleus absorbs a neutron after which it splits into a krypton - 92 nucleus and a barium - 141 nucleus. Thereafter it releases three more neutrons.
Thus, X is the image represents barium - 141 nucleus.
(141,56) Ba
please answer this if you do I will answer your questions!!
Answer:
i think the forces are the same and size and in opposite directions
Explanation:
Answer:
I think it should be
The forces are the same size and in opposite directions
Explanation:
because newtons third law is applied equal force but opposite
An ionic compound is
A.a salt
B.held together by a transfer of electrons
C.composed of anions and cations
D.held together by sharing of valence electrons
What is a rule for determining the mass number of an atom or ion?
Answer:
The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus
Explanation:
Each proton and each neutron weigh one amu( atomic mass unit), adding together the neutrons and protons and multiplying by 1 amu you get the mass of an atom
If 0.484J of heat is added to 0.1372g of water, how much will the temperature increase?
0.263 °C
0.927 °c
0.843 °C
0.460 °C
Answer:
ΔT = 0.843 °C
Explanation:
Given data:
Heat added = 0.484 J
Mass of water = 0.1372 g
Temperature increase = ΔT = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Specific heat capacity of water is 4.184 j/g.°C
Now we will put the values in formula.
0.484 j = 0.1372 g × 4.184 j/g.°C× ΔT
0.484 j = 0.574j/°C× ΔT
ΔT = 0.484 j / 0.574j/°C
ΔT = 0.843 °C
What is the balance of this reaction=1N2+3H2=2NH3
N2 + 3 H2 = 2 NH3
Reaction type: synthesis
what is more reactive Na ( sodium) or As ( arsenic )?
Answer:
Arsenic would be more reactive.
Explanation:
Electronegativity (tendency of an atom to attract a bonding pair of electrons) increases as you move up and to the right of the periodic table.
Elements further to the right of the table have more valence electrons, meaning they are closer to creating the full ring (8 electrons) and therefore are more reactive.
Arsenic is more further up and to the right than Sodium.
1.Light waves (shown) are an example of what type of wave? (Lesson 4.03)
Question 1 options:
longitudinal wave
transverse wave
surface wave
-----------------------------------------------------------------------------------------------
2. During an earthquake, energy that has built up in the earth's crust is released by waves traveling through which type of medium? (Lesson 4.02)
Question 2 options:
the water
the ground
the air
a vacuum
--------------------------------------------------------------------------------
3.Sound, earthquakes, and waves in water are mechanical waves because they require a physical _______to transport energy. (Lesson 4.02)
Question 3 options:
electromagnetic field
disturbance
medium
location
-------------------------------------------------------------------------
The words that complete the blanks are;
1) transverse waves
2) the ground
3) medium
What is a wave?We know that a wave is simply the kind of disturbance that moves along a medium and in the process there is a transfer of energy from one point to another. There are various kinds of waves and the classification of the waves is based on the amount of energy that is transferred in each case.
1) We know that in the case of the light waves, the direction of the wave is perpendicular to the motion of the particle that causes the wave as such we can all it a transverse wave.
2) We know that a wave must always involve an energy that is travelling and in this case, the energy is travelling through the land and this is the ground.
3) We know that the mechanical waves must have to move through a medium of propagation. As such, mechanical waves must move through a medium.
Learn more about waves:https://brainly.com/question/3639648
#SPJ1
To pass a test with 15 questions how many can I get wrong?
Answer:
You can get 7 answers wrong.
Explanation:
Let's calculate the average
[tex]\frac{15}{2} \\\\=7.5[/tex]
So if you correctly answer 8 -15 (7.5 is approximated to 8 )questions correctly you will pass.
So you can get 7 answers wrong.
Isopentyl acetate is the molecule largely responsible for the aroma and taste of bananas. It is made up of carbon, hydrogen, and oxygen. Combustion of a 3.256-g sample of isopentyl acetate produces 7.706 g CO2 and 3.156 g H2O. Using these results, what is the correct empirical formula for isopentyl acetate?
Answer:
Explanation:
7.706 g of CO₂ will contain 12 x 7.706 / 44 g of C
= 2.1 g of C .
This will be contained in 3.256 g of isopentyl acetate
3.156 g of H₂O will contain 2 x 3.156 / 18 g of H
= .351 g of H
This will be contained in 3.256 g of isopentyl acetate
Rest will be oxygen
amount of oxygen in 3.256 g of isopentyl acetate
= 3.256 - ( 2.1 + .351 )
= .805 g
ratio of C , H , O in isopentyl acetate
= 2.1 g : .351 g : .805 g
2.1 / 12 : .351 / 1 : 0.805 / 16 ratio of moles
= .175 : .351 : .05 ratio of moles
= 3.5 : 7.02: 1
= 7 : 14 : 2
empirical formula of isopentyl acetate
= C₇ H₁₄ O₂ .
Which molecule contains a triple bond?
A.N₂
B.F₂
C.O₂
D.I₂
Answer:
N2.
Explanation:
Iron (Fe) reacts
with oxygen gas (O2) to form rust (Fe2O3). Balance the equation below
by writing in the coefficients to ensure that the same number of each
kind of atom appears on both sides of the equation.
Answer:
The balanced equation is given below:
4Fe + 3O2 —> 2Fe2O3
Explanation:
Fe + O2 —> Fe2O3
The above equation can be balance by doing the following:
Fe + O2 —> Fe2O3
There are 2 atoms of O on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of O2 and 2 in front of Fe2O3 as shown below:
Fe + 3O2 —> 2Fe2O3
There are 4 atoms of Fe on the right side and 1 atom on the left side. It can be balance by putting 4 in front of Fe as follow:
4Fe + 3O2 —> 2Fe2O3
Thus, the equation is balanced