#1
2 mol of water is made when 6mol of HNO3 are consumed.Let moles of water can be made be x
[tex]\\ \sf\longmapsto \dfrac{2}{6}=\dfrac{x}{28}[/tex]
[tex]\\ \sf\longmapsto \dfrac{1}{3}=\dfrac{x}{28}[/tex]
[tex]\\ \sf\longmapsto 3x=28[/tex]
[tex]\\ \sf\longmapsto x\approx 9mol[/tex]
#2
Let moles of water can be made be x
[tex]\\ \sf\longmapsto \dfrac{3}{2}=\dfrac{x}{76}[/tex]
[tex]\\ \sf\longmapsto 2x=76(3)=228[/tex]
[tex]\\ \sf\longmapsto x=114mol[/tex]
Which location in the diagram above is the Southern Hemisphere experiencing summer?
Location A
Location B
Location C
Location D
Answer:
location a
Explanation:
Answer:
Location B
Explanation:
11. A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the
mass of the loaded cart is 3,500g and the height of the seat top is 0.45 meters, then what is the potential energy of the
loaded cart at the height of the seat-top?
Answer:
15.75 J
Explanation:
Potential energy
= mgh
= 3,500 g × 10 m/s² × 0.45 meters
= 3.5 kg × 4.5 m²/s²
= 15.75 J
1. Rank each of the following in order of INCREASING atomic radius
a F, K, Br
b. Mg. Na, Cs
c. Os, Ni, Fe
2. Rank each of the following in order of DECREASING atomic radius
A. CI, Br, Ga
B. Ne, Rn, Pb
C. Ca, Rb, C
Convection currents in the atmosphere influence many weather patterns. What property of the air has the most influence on convection currents?
1. The direction of the wind
2. The velocity of the wind
3. The temperature of the air
4. The mass of the air
Convection currents are largely influenced by air temperature. A low-pressure area is produced when air is heated because it becomes less dense and rises.
What effect on the climate does convection have?For instance, the air above the Earth heats and rises as its surface warms from the sun. This air may continue to rise while cooling and producing cumulus clouds if the conditions allow.
How do air masses respond to convection currents?Climate-affecting wind patterns are driven by convection currents. Convection currents are used to shift air masses. There are two different kinds of air masses: warm and cold. From higher latitudes to lower latitudes, cold air masses travel.
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multiple answers, Ion formed by Oxygen?
O2+
O2-
Oxide
Answer:
Explanation:The formation of the oxide ion, O
2−
(g), from oxygen atom requires first an exothermic and then an
endothermic step as shown below:
O(g)+e
−
→O
−
(g);Δ
f
H
⊖
=−141kJmol
−1
O
−
(g)+e
−
→O
2−
(g);Δ
f
H
⊖
=+780kJmol
−1
Thus, process of formation of O
2−
in gas phase is unfavourable even though O
2−
is isoelectronic with neon. It is due to the fact that:
The substance chlorine monoxide, ClO(g), is important in atmospheric processes that lead to the depletion of the ozone layer. The ClO molecule has an experimental dipole moment of 1.24 D and the Cl−O bond length is 1.60 Å.
Part A: Determine the magnitude of the charges on the Cl and O atoms in units of the electronic charge, e.
Part B: Based on the electronegativities of the elements, which atom would you expect to have a partial negative charge in the ClO molecule?
Atom O or Atom Cl
Part C: Using formal charges as a guide, propose the dominant Lewis structure for the molecule. (Draw a diagram)
Part D: The anion ClO− exists. What is the formal charge on the Cl for the best Lewis structure for ClO−?
A) The magnitude of the charges on CI and O atoms are : +0.16e and -0.16e respectively
B) Atom O will have a partial negative charge on the CIO molecule
C) Attached below
D) The formal charge on Cl is +3
A) Determine magnitude of charges on CI and O
Magnitude of charge = dipole moment / bond length --- ( 1 )
where : dipole moment = 1.24 D * [tex](\frac{3.34*10^{-30} C m}{1 D} )[/tex]
Bond length = 1.60 A° * [tex]( \frac{10^{-10} m}{A^{0} } )[/tex]
∴ Magnitude of charge = 2.56 * 10⁻²⁰ C
Note : Charge of an electron = 1.602 * 10⁻¹⁹ C
Therefore the magnitude of charges on CI and O atoms is
2.56 * 10⁻²⁰ C * [tex]\frac{1e}{1.602*10^{-19} }[/tex] = 0.16 e
Therefore
charge on CI = +0.16e
charge on O = -0.16e
Hence we can conclude that A) The magnitude of the charges on CI and O atoms are : +0.16e and -0.16e respectively and Atom O will have a partial negative charge on the CIO molecule also The formal charge on Cl is +3
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If Bromine has a charge of 1-, how many electrons does it have?
Answer:
35
Explanation:
The atomic number for bromine is 35, which means it has 35 protons in its atomic nuclei. A neutral bromine atom would also have 35 electrons. In order for a bromine atom to become a
1
−
bromide ion, it would have to gain an additional electron.
How many moles of KBr are present in 180. mL of a 0.108 M solution?
Express the amount in moles to three significant digits.
by molality you can find the mole
MARKING BRAINLIEST!
Which of the following best defines velocity?
It is an object's speed at a specific point in time.
It is the total distance traveled over the total time.
It is the speed of an object in a specific direction.
It is a measure of how far an object moves in a certain time.
Answer:
3
Explanation:
The velocity is basically the speed + the direction of an object put into one quantity, velocity.
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HOPE THIS HELPS BRAINLIEST PLZZ
The following reaction represented oxidation of organic matter (CH2O) using nitrate ions.
If G° = -118.7Kj/mol at 25°C, calculate E°CELL and the equilibrium constant for this
reaction:
14 CH20 + 1/5 NO3 +1/5 H
= CO2 + 1/10 N2 +7/20 H2O
[5]
sorry but i don't know again sorry!
How many grams of NaBr must he measure out to have 4.20 moles?
Answer: 432 grams
Explanation:NaBr must he measure out to have 4.20 moles.
12) SEP Use Mathematics Complete the table by identifying the atomic number and
mass number for each atom and then using those data to determine the numbers
of protons, neutrons, and electrons.
Composition of Atoms
Atom
Atomic number
Mass number
Protons
Electrons
Neutrons
Na
2s
silver-108
47
T
gold-197
79
O
+ Back
Next →
INTL
The given elements are Na, Ag and Au.
1. Sodium(Na)
Mass number= 23 u
Atomic number=11
Number of protons= Number of electrons= Atomic number=11
Number of neutrons= Mass number- Number of protons=23-11=12
2. Silver (Ag)
Mass number= 108 u
Atomic number= 47
Number of protons= Number of electrons= Atomic number= 47
Number of neutrons= Mass number- Number of protons=108-47=61
3. Gold (Au)
Mass number= 197 u
Atomic number= 79
Number of protons= Number of electrons= Atomic number= 79
Number of neutrons= Mass number- Number of protons= 197-79=118
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Which tool should Darla and Rob use to measure the force that pulls a car down the map
Answer:
C. A Spring Scale
Explanation:
Using process of elimination, we can quickly decide that a stopwatch and a ruler will not be useful in measuring the force. This leaves us with either the spring scale or a balance scale. A balance scale is used to compare two weights, so this is eliminated. That leaves us with a spring scale. This is because we can attached the spring scale to the car and when we let it go, we can record the force. I hope this helps!
C12H22O11 is an example of a(n):
ionic compound
empirical compound
molecular compound
salt compound
Answer:
molecular compound
Explanation:
it has two or more nonmetal elements and are covalently bonded
what is kinetic enegry
Kinetic energy → the kinetic energy of an object is the energy that it possesses due to its motion
For an example ↓
Hi! ❤️ i need some help here thank you! ill give brainliest if able to.
Which Liquid, A or B, would float on top of the other if the two liquids were put in the same container?
Liquid A = 8 g/ml
Liquid B = 3 g/ml
Answer:
liquid B
Explanation:
because of the density of liquid A being 8, liquid B being 3 would be less dense
3. A light bulb containing argon gas is switched on,
and after 30 minutes its temperature is 418 K
What Celsius temperature is equal to 418 K?
Answer:
The assumption is quite reasonable.........
A lightbulb contains Ar gas at a temperature of 295K and at a pressure of 75kPa. The light bulb is switched on, and after 30 minutes its temperature is 418 K. What is a numerical setup for calculating the pressure of the gas inside the light bulb at 418K?
Explanation:
P
1
T
1
=
P
2
T
2
given constant
n
, and constant
V
, conditions that certainly obtain with a fixed volume light bulb.
And so
P
2
=
P
1
T
1
×
T
2
=
75
⋅
k
P
a
295
⋅
K
×
418
⋅
K
≅
100
⋅
k
P
a
.
Had the light bulb been sealed at normal pressure during its manufacture, what do you think might occur when it is operated?
The (15-35-15) number on a bag of fertilizer is calculated by an outdated method. All modern fertilizers use PO43- as a source of phosphorus. Use your knowledge of the old methods to determine the moles of phosphorus found in 10.0 grams of (15-35-15)?
The (15-35-15) number on a bag of fertilizer is calculated by an outdated method. Using the knowledge of the old methods, the number of moles of phosphorus found in 10.0 grams of phosphorus is 0.05 mole.
The (15-35-15) number on the bag of fertilizer is used for:
Nitrogen 15 : Phosphorus pentoxide 35: potassium oxide 15Thus, in a 100-gram bag of fertilizer, there are 35 grams of phosphorus pentoxide P₂O₅.
∴
To determine the number of moles of 10 grams of phosphorus pentoxide in (15-35-15) bag of fertilizer, we have:
[tex]\mathbf{=10 \times \dfrac{35}{100} \ grams \ of \ P_2O_5}[/tex]
= 3.5 grams of P₂O₅
Recall that:
[tex]\mathbf{Number of moles = \dfrac{mass}{molar \ mass}}[/tex]
the molar mass of P₂O₅ = 142 g/mol∴
[tex]\mathbf{Number of moles = \dfrac{3.5\ g}{ 142 \ g/mol}}[/tex]
[tex]\mathbf{Number of moles = 0.0246 \ mol}[/tex]
Provided that 1 mole of P₂O₅ harbors 2 moles of phosphorus;
Then;
The number of phosphorus present in 10.0 grams of (15-35-15) fertilizer is:
= 0.0246 moles × 2
= 0.0492 moles
≅ 0.05 moles
Therefore, we can conclude that the number of moles of phosphorus found in 10.0 grams of (15-35-15) bag of fertilizer is 0.05 moles.
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Which location in the diagram above is the Northern Hemisphere experiencing winter?
Location A
Location B
Location C
Location D
Answer:
location b
Explanation:
Answer:
Location D
Explanation:
is true answer
2567 milliliters to liters
Answer:
2.567
Explanation:
To change milliliters into liters you divide by 1000
So when you divide 2567 by 1000 you get 2.567
Calculate the osmolarity of a 1.15% (m/v) KBr solution.
Answer:
1) Convert percent (m/V) to molarity
percent (m/V)=1.15 grams/100ml=1.15 g/0.1L=11.5g/L
molarity of KBr=mol/L=g/L *(1mol/molecular weight of KBr)=(11.5g/L) * (1mol/119.0g/mol)=0.0966 mol/L=0.0966M
2) calculation of osmol from mol
In solution, KBr dissociates into two ions K+ and Br- so there are 2 osmol of KBr per mol
3) calculation of osmolarity=molarity*2=0.0966*2=0.193 Osm or Osmolar
Explanation:
brainliest would be appreciated.
please answer this correctly
Answer:
5: tomato and vinegar
6: air
The theory of spontaneous generation states that *
A. Even though higher level organisms cannot be created from inanimate objects, it is possible for microorganisms
B. Living organism can be created from nonliving matter
C. Life is created by other living things
D. Only living humans can create other living creatures
Answer:
B. Living organism can be created from nonliving matter
Explanation:
The theory of spontaneous generation states that life could come from non-living things.
Moon rocks resemble rocks from which of the following layers of the earth?
How many significant figures are in the following number? 3,000.0 x 10⁴ grams
Answer:
5 significant figures.
Explanation:
The decimal place makes the zeros significant.
please help me solve this
Answer:
dude your handwriting!!!
Which of the following resources can be obtained from the hydrosphere?
when an ion has a positive charged what has the highest value of this ion ?
is it
proton
neutron
electron
nucleon
and why?
Answer:
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CONTENTS
PHYSICAL GEOLOGY
Chapter 2 Minerals
2.1 Electrons, Protons, Neutrons, and Atoms
All matter, including mineral crystals, is made up of atoms, and all atoms are made up of three main particles: protons, neutrons, and electrons. As summarized in Table 2.1, protons are positively charged, neutrons are uncharged and electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.
Table 2.1 Charges and masses of the particles within atoms
Elementary Particle Charge Mass
Proton +1 1
Neutron 0 1
Electron −1 ~0
The element hydrogen has the simplest atoms, each with just one proton and one electron. The proton forms the nucleus, while the electron orbits around it. All other elements have neutrons as well as protons in their nucleus, such as helium, which is depicted in Figure 2.2. The positively charged protons tend to repel each other, and the neutrons help to hold the nucleus together. The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.
For most of the 16 lightest elements (up to oxygen) the number of neutrons is equal to the number of protons. For most of the remaining elements, there are more neutrons than protons, because extra neutrons are needed to keep the nucleus together by overcoming the mutual repulsion of the increasing numbers of protons concentrated in a very small space. For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).
helium atom
Figure 2.2 A depiction of a helium atom.
The dot in the middle is the nucleus, and the surrounding cloud represents where the two electrons might be at any time. The darker the shade, the more likely that an electron will be there. An angstrom (Å) is 10-10m . A femtometre (fm) is 10-15m. In other words, a helium atom’s electron cloud is about 100,000 times bigger than its nucleus.
Electrons orbiting around the nucleus of an atom are arranged in shells — also known as “energy levels.” The first shell can hold only two electrons, while the next shell holds up to eight electrons. Subsequent shells can hold more electrons, but the outermost shell of any atom holds no more than eight electrons. The electrons in the outermost shell play an important role in bonding between atoms. Elements that have a full outer shell are inert in that they do not react with other elements to form compounds. They all appear in the far-right column of the periodic table: helium, neon, argon, etc. For elements that do not have a full outer shell, the outermost electrons can interact with the outermost electrons of nearby atoms to create chemical bonds. The electron shell configurations for 29 of the first 36 elements are listed in Table 2.2.
3. Which statements are true based on the Bohr model of the atom? Select all that
apply.
encore
a. Atomic emission spectra are due to electrons losing energy and changing
energy levels
b. The energy of transition for n=3 to n=4 would be the same as n=5 to n=6
c. The first energy level is set at zero energy
d. Electrons lose energy as they travel around the nucleus
e. Each energy level has a specific energy value
The model of Neils Bohr postulates that electrons in atoms are found in specific energy levels. Transition from a higher to a lower energy level produces an emission spectrum characteristic of elements.
According to Bohr's model of the atom, an electron in atom exists in distinct energy levels. Electrons can be promoted from lower to higher energy levels when they absorb energy. The electrons are unstable in this higher energy excited state hence they quickly return to the ground state emitting energy. This emission is characteristic of elements.
The following statements are true based on the Bohr model;
Atomic emission spectra are due to electrons losing energy and changing energy levels.Each energy level has a specific energy valueLearn more: https://brainly.com/question/24556237
There are 300 light particles in an airtight container. Which adjustment would increase the speed of the particles?
A. keeping the volume constant and replacing the light particles with heavy particles
B. keeping the pressure constant and increasing the temperature
C. keeping the volume constant and cooling the container
D. keeping the temperature constant and increasing the container volume
There are 300 light particles in an airtight container. The adjustment that would increase the speed of the particle is keeping the pressure constant and increasing the temperature. Option B is correct.
The speed of a particle is the distance traveled by one molecule of a substance. Particles travel as a result of the kinetic energy they possess.
The kinetic energy attributed to each particle rises as the temperature rises.
As a result, in 300 light particles, the particles will travel more quickly when the temperature is increased while the pressure of the particle remains constant.
Therefore, we can conclude that the adjustment that would increase the speed of the particles is keeping the pressure constant and increasing the temperature.
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