Answer:
v = distance/time = 60m/20s = 3 m/s
When air moves in small circular patterns, it moves within a
Answer:
Convection
Explanation:
In class we derived the Gibbs energy of mixing for a binary mixture of perfect gases. We also discussed that the same result is obtained for liquids when the resulting solution is ideal. For real solutions we introduced activities and activity coefficients. Derive the molar Gibbs energy of mixing and the molar excess Gibbs energy of mixing in terms of activity coefficients.
Answer:
Attached below
Explanation:
Free energy of mixing = ΔGmix = Gf - Gi
attached below is the required derivation of the
a) Molar Gibbs energy of mixing
ΔGmix = Gf - Gi
hence : ΔGmix = ∩RT ( X1 In X1 + X2 In X2 + X3 In X3 + ------- )
b) molar excess Gibbs energy of mixing
Ni = chemical potential of gas
fi = Fugacity
N°i = Chemical potential of gas when Fugacity = 1
ΔG = RT In ( a2 / a1 )
12. What is the empirical formula for C10H30O5?
I need some help with this
Answer:
1: b
2: in the article it says that the benefits from the drug outweigh the costs, so it think it is effective.
3. Which of the following chemical equations is balanced? *
N2+H2 → NH3
N2+3H2→ 3NH3
N2+3H2→ 2NH3
A 1500 L weather balloon is at a temperature of 290 K on the ground. As it rises the
temperature drops. At 15,000 ft, the temperature is down to 210 K. What is the
volume at this elevation? (please show work)
Answer:
1500/290 = x/210 = 1086.2 L
Explanation:
This problem is solved with Charles Law which says
V¹/T¹ = V²/T²
What is the pH of a 4.5 x 10 M HI solution?
Answer:
ik ppl sy no links but https://courses.lumenlearning.com/cheminter/chapter/the-ph-scale/
Explanation: it should help you
250 mL of water is collected during a combustion reaction. The temperature in the
room is 23 °C and the pressure is 105 kPa. How many moles of water was collected?
(please show work)
Answer:
10.67 moles is the answers.hope it helped
Which block of elements is non-reducing?
Answer: S-block elements
Explanation: Elements of S-block are prepared through the electrolysis process not by the reduction of their compounds with the other group elements of their compounds. For example in Carbon dioxide carbon is non reducing because oxidation state of `C "in" CO_(2)` is `+4`, which is maximum So it does not undergo oxidation, and hence, it is not a reducing agent.
Determine the number of atoms or molecules in 0.30 mol F
Answer:
4.214 x10 23 atoms
Explanation:
.7 x (6.02x 10 23)
for every mol there is
6.02 e 23 atoms so if you multiply both you get the atoms
Define the term valence electrons
Answer:
Valence electrons are the number of electrons in an outer shell of an atom that can participate in forming chemical bonds with other atoms.
How is beryllium (Be) similar to calcium (Ca)?
Explanation:
beryllium, calcium, strontium, barium, and radium; they are in the same group of table.
Answer:
Both Beryllium and Calcium have 2 valence electrons, i.e. in ther electronic configuration there are 2 electrons remaining in the outermost shell. Thus their valencies are also 2.
Electronic Configurations:
Beryllium (4) : - [2, 2]
Calcium (20) : [2, 8, 8, 2]
Hope it helps
Thank you for the question
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Edit
a. both are very reactive
b. both react readily with elements in group 1
c. both rarely combine with other elements
d. both are rare metals
(As per the suggestion of bvbfanforeverap5j54d)
How many moles are in 3.555 g of c2h2?
Answer:
0.13653499904751903
Explanation:
Convert Units .com
What is the formula for Iodine Pentafluride?
Answer:
It's IF5. ................
Iron has a density of 7.31 g/cm3.what is the mass of 2.25 cm3 of sodium?
7.9 g/cm3 is the density of iron. There are three possibilities: 1.3 × 103 g 2.3 × 10-2 g 4.3 × 102 g 2.1 × 104 g 1.4 g.
What is the density of iron?Iron has a density of 7.874g/cm3.
At atmospheric pressure, different substances have their typical densities.
The mass per unit volume is the definition of density. Mathematically speaking, its intense attribute is defined as mass divided by volume:
ρ = m/V
The total mass (m) of a material divided by the total volume (V) . it occupies is how a substance is defined as having a density (). The kilogram per cubic meter (kg/m3) is the metric unit used by the SI. The pounds mass per cubic foot (lbm/ft3) measurement is used in Standard English.
Compressibility (also known as the coefficient of compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.
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Clouds most likely form as a result of
Answer:
Some clouds form as air warms up near the Earth's surface and Rises heated by Sunshine the ground heats the air just above it that warm air starts to rise because when warm it is lighter and less dense than the air around it as it rises its pressure and temperature drop causing water vapor to condense.
When airborne water vapor condenses into observable water droplets or ice crystals, clouds are created.
Condensation is most likely the cause of cloud formation. The transformation of airborne water vapor into a liquid or solid state is known as condensation. When the air is cooled or the pressure of the water vapor is raised, this occurs.
Water vapor from the Earth's surface is constantly evaporating into the atmosphere. When this water vapor rises, it cools in the atmosphere. The pressure of water vapor rises as the air cools. Water vapor will condense on minute airborne particles like dust, pollen, or salt crystals when the water vapor pressure reaches a particular level.
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if you were to toss a lit match onto a planet of hydrogen AND oxygen, would the planet explode?
Answer:
yeah the planet would go boom
What would be the pressure if a canister with a volume of 8.95 L holds 0.155 mol of N2 at 23C
The pressure of a container with a volume of 8.95 L holds 0.155 mol of N₂ at 23°C is 42.64 atm.
What is ideal gas law ?Ideal gas law is also called as perfect gas law. It is represent by the equation PV = nRT, where, 'P' is the pressure, 'V' is the volume in liters, 'n' is the number of particles in moles, 'T' is the temperature in Kelvin and 'R' is the ideal gas constant.
By ideal gas equation,
PV = nRT
Where,
P = Pressure
V = Volume
n = Number of moles
R = gas constant
T = Temperature
First convert temperature into kelvin
23°C + 273 = 296.15K
By putting given value in ideal gas equation we can solve this problem
P × 8.95 = 0.155 × 8.314 × 296.15 ÷ 8.95
= 381.64 ÷ 8.95
= 42.64 atm
Thus, The pressure of a container with a volume of 8.95 L holds 0.155 mol of N₂ at 23°C is 42.64 atm.
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consider this a reaction 2H+ + CO3²- → H₂O + CO₂ . Identify each of the following as a product, a reactant, or a coefficient.
The reactant, product and coefficient of the chemical equation are 2H⁺ and CO₃², H₂O and CO₂ and 2 respectively. Chemical reaction is the reaction between two or more substances to form a new substance.
How do you identify a product and reactant?The left side of the equation lists reactants as the initial materials. The right-hand side of the equation lists the products, which represent the outcome of the reaction. Products are the compounds created during a chemical reaction, whereas reactants are the substances that cause the reaction. The general chemical formula can be used to express a chemical reaction. During chemical reactions, bonds disintegrate and reassemble. Additionally, the reverse response takes place. Reactants and products are involved in every chemical reaction. In a combustion reaction, the reactants are air and candle wax. Products are the compounds created during a chemical reaction, whereas reactants are the substances that cause the reaction.To learn more about product and reactant refer to:
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Rocky objects that are massive enough will have a spherical shape due to the force of gravity. (no links or else I will report you)
True
False
Which of the following best describes radiation? A. A specific wavelength of energy that can be natural or man-made. B. Particles or waves emitted from an atom. C. Dangerous energy emitted from man-made nuclear power sources. D. The unstable nucleus of an atom.
Answer:
c. just like in xray machines
Explanation:
Radiation is the energy that contains electric and magnetic fields. They are the particles or the waves that are emitted from the atom. Thus, option B is correct.
What are radiations?Radiations are the energy or the waves transmitted in a medium or space due to the excitement of the atomic electronic transition. They are caused due to emission and removal of the electron from the atom's inner shell.
They are used in various fields of science including health and medicine where they are used to treat cancerous and tumor cells by killing the abnormal cells or slowing their growth.
Also, they are harmful as they act as mutagens that can alter the genetic material of the organism and can posses a dangerous threat to health.
Therefore, radiations are the waves emitted from atoms.
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identify a biological problem in your community and describe how you will use the scientific method to solve it
Answer:
There is a pawpaw here that is not producing any fruit.. so I will take a pollen grains from another pawpaw and pollinate it..
How many grams of NaOH are contained in 5.0*10ml of a0. 77 sodium hydroxide solution
Answer:
1.54grams
Explanation:
Molarity of a solution = n/V
Where;
n = number of moles (mol)
V = volume (L)
Based on the information given in this question;
Volume of NaOH solution = 5.0 × 10ml
= 50ml = 50/1000 = 0.050 L
Molarity = 0. 77 M
Using; Molarity = n/V
0.77 = n/0.05
n = 0.77 × 0.05
n = 0.0385mol
To find the mass (grams) of NaOH in the solution, we use the following formula:
mole (n) = mass/molar mass
Molar mass of NaOH = 23 + 1 + 16 = 40g/mol
0.0385 = mass/40
mass = 0.0385 × 40
mass = 1.54grams.
Which of the following 1.0 M solutions con-
tains the most particles?
1. glucose
2. ethylene glycol
3. magnesium sulfate
4. potassium chloride
5. sodium sulfate
The most soluble substances gives more number of particles in solution. 1.0 M of sodium sulphate contains most particles here.
What is solubility?Solubility of a solute is the fraction of its concentration which is dissolved in a solvent. When solutes dissolved in solvent the dissociates into ions.
Solubility of a substance depends on the temperature, pressure, bond type and molecular weight of the compound. The no.of particles produced by a molecule when dissolved vary from compound to compound.
Glucose and ethylene glycol partially dissolves in water and they give only one particle as such and does not form ions.
Potassium chloride gives one K⁺ ions and Cl⁻ ions and magnesium sulphate gives one Mg²⁺ and SO₄²⁻ ions. Whereas, sodium sulphate (Na₂SO₄) gives two sodium ions and one sulphate ion.
Hence, more particles are produced when sodium sulphate is dissolved in water. Therefore, 5th option is correct.
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What is the density of a 1209 kg object that is 1.94 m3 in size?
Answer:
623 kgm^-3
Explanation:
Density = Mass/Volume
Mass = 1209 kg
Volume = 1.94 m^3
Density = 1209 / 1.94 kgm^-3
= 623.1958763 kgm^-3
= 623 kgm^-3 (3sf)
Which of the following microorganisms is most likely to get its main source of nutrition from a host?
Bacteria
Parasite
T-cell
Virus
Answer:
A Parasite.
Explanation:
Viruses and bacteria can survive in most areas without a host. Parasites however need a host to survive. Some parasites include: tapeworm, roundworms, flukes, and protozoa.
All rivers have deltas; explain the process that forms these common landmasses.
How does a river form a delta?
Deltas are wetlands that form as rivers empty their water and sediment into another body of water. ... Deltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. Although very uncommon, deltas can also empty into land.
A human nose is capable of detecting how many basic odors?
a.
20
b.
40
c.
49
d.
50
Answer:
20
Explanation:
What is voltage? A. The pressure that pushes electrons to the anode; it is derived from the negative charge of electrons at the cathode. B. None of these C. The speed of the electrons flowing to the anode; it is determined by the type of metal the electrodes are made of. D. The pressure that pushes electrons to the cathode; it is derived from the negative charge of electrons at the anode.
Answer:
D
Explanation:
I think it's D but not 100% sure
The pressure that pushes electrons to the cathode is derived from the negative charge of electrons at the anode. Hence, option B is correct.
What is an electrolytic cell?An electrolytic cell is a type of electrochemical cell that undergoes non-spontaneous reactions by deriving the energy in the form of voltage from external sources.
A voltaic cell is a cell in which chemical reactions are used to produce electrical energy in form of current.
Such a cell is made up of two electrodes and their electrolytes. The electrodes are connected via a salt bridge. The salt bridge allows electrons to move between the electrodes.
In a voltaic cell, an oxidation reaction occurs in the anode. During oxidation, electrons are produced. Therefore, the Na electrode in the anode will lose an electron spontaneously. At the cathode, reduction occurs. The Iron electrode here will gain the electron produced by the oxidation reaction at the anode. The salt bridge moves the electrons from the anode to the cathode.
Hence, the pressure that pushes electrons to the cathode is derived from the negative charge of electrons at the anode.
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How is dinitrogen (1) oxide distinguished shed from oxygen
Answer:
See Explanation
Explanation:
Both oxygen and dinitrogen (1) oxide are known to rekindle a glowing splint. However, oxygen is an odorless gas while dinitrogen (1) oxide has a faint smell and has an effect on the central nervous system.
Also, the combustion of dinitrogen (1) oxide produces brown fumes of nitrogen IV oxide.
Finally, when dinitrogen (1) oxide and oxgen are both heated with copper, residual nitrogen gas is left with dinitrogen (1) oxide while no residual gas is left with oxygen.