Answer:
0.00726mol
Explanation:
Using general gas equation,
PV = nRT
Where;
P = pressure
V = volume
n = number of moles
R = gas constant (0.0821 L atm mol/K)
T = temperature
First, we need to convert the units of each variable
Volume = 185mL = 0.185L
Pressure = 760.0 torr = 1 atm
Temperature = 98.6°F = 310.15K
PV = nRT
1 × 0.185 = n × 0.0821 × 310.15
0.185 = 25.46n
n = 0.185/25.46
n = 0.00726mol
Sort the characteristics based on whether they describe a dog, a computer, or both.
has internal
organization
has living
cells
uses energy
produces
offspring
lacks genetic
material
Answer:
both have internal organization dog only has living cells both use energy dogs only produce offspring computers only lack genetic material
What element is represented by each electron
configuration?
A. 1s 2s22p5
B. [Ar]4s
C. [Xe]6s24f
D. [Kr]5s4d105p+
E. [Rn]7s25f13
F. 1s 2s 2p 3s 3p 4s3d104p
Answer:
F.1s 2s 2p 3s 3p 4s3d104p
The element in the first configuration is F and the element in the second option is calcium Ca. The configuration in option c is of cerium Ce and it is cadmium in option D. The configuration in E is mendelevium and F is zinc.
What is electronic configuration?An electronic configuration represents the filling of electrons in various energy level. Electrons fill from the lowest energy levels to the highest energy level.
The first configuration have a total of 9 electrons. The 9th element is fluorine. The second configuration given is of 20 electrons. That is 18 electrons of argon plus 2 electrons in 4s. The 20th element is calcium.
The third configuration have 58 electrons and the element is cerium Ce. The configuration given in option D is of cadmium with 48 electrons and that in option E is mendelevium with 101 electrons.
In the last option, the configuration contain a total of 30 electrons. 3o th element in periodic table is zinc, Zn.
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(2 words) if compose means to put together then decompose means to what? 9 letters!
lonic compounds can conduct electricity in
Answer:
Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move
Explanation:
Does salt affect how long an ice cube melts?
I am just talking about normal salt, not special salt (if that exists).
Answer:
Ice cubes with salt melt faster. When you add salt, it dissolves in the water of the ice cube. The freezing temperature of salt water is 32 degrees Fahrenheit lower than that of fresh water.
Which of these is NOT a layer of the skin?
Answer:
Penis EPISODE ONE!!
NEW ADVENTURES
Explanation: MAKE SURE TO LIKE AND SUB!!
Where would the most reactive metallic elements of the periodic table be found?
In the B families
On the top of the table
On the far left of the table
Answer:
I think it should be 'On top of the table'
what is the GMM of 64gm of oxygen
Answer:
16 g/mol
Explanation:
The GMM of oxygen is 16 no need for mass
Please help due in 5 min. I need this to be done or my grade will drop from a 96 to a 32.
Calculate the energy and frequency of red light having a wavelength of 6.55 x 10^-5 cm.
Answer:
E = 3.035× 10-¹⁹J = 1.9eV
f = 4.58 × 10¹⁴Hz
Explanation:
wavelength = 6.55 × 10-⁷m
c = 3 × 10⁸m/s
f = ?
E = ?
a) f = c/wavelength
f = 3 × 10⁸/6.55 × 10-⁷
f = 4.58 × 10¹⁴Hz
b) E = hc/wavelength
E = 6.626×10-³⁴ × 3 × 10⁸/ 6.55 × 10-⁷
E = 3.035 × 10-¹⁹J
1ev = 1.6 × 10-¹⁹J
Therefore E = 3.035/1.6 = 1.9eV
Explanation:
speed of light = wavelength * frequency
frequency =speed of light/wavelength
Let frequency = F
Speed of light = 3.0 *10^8
wavelength = 6.55 * 10^-5 cm = 6.55 * 10^-7m
Therefore F= 3.0 *10^8m/s *6.55 * 10^-7m
F = 196.5Hz
Energy = Planck's constant * frequency
Let energy be E
Planck's constant = 6.63 * 10^-34Joule/ seconds
E = 6.63 * 10^-34 * 196.5Hz
E=1.3027 * 10^-31 J
What do I write? Please hurry
Answer:
Plants wilt when the turgor turns to zero. From diminished water in cells. The rate of water being lost is greater then the water being absorbed.
Something like this. NOT EXACTLY THIS this is just an example.
I didn't know anything about this topic but I looked it up. For the other words I would look up the other words and see what they have to do with plants withering.
25 pointss How do the plates and mantle interact at each type of plate boundary?
Answer:
what that girl said lol
Answer:
honestly.. idk lol
Explanation:
The white Dwarfs are a group of stars that are-
A)Extremely bright and hot
B)Low in brightness but are average to high in temperature
C)Average in brightness but high in temperature
D)Average in brightness and average in temperature
Answer: A
Explanation:
The white Dwarfs are a group of stars that are extremely bright and hot. Hence option A is correct.
What are stars?Stars are defined as any large gaseous heavenly body that emits light as a result of its own internal energy sources. Stars are celestial bodies that generate their own energy through the fusing of gases. They resemble bright orbs that burn gas and produce energy. Our solar system's star, the Sun, generates energy through the fusion reaction in which helium transforms into hydrogen.
When a white dwarf first forms, it is extremely hot, but because it has no energy source, it will gradually cool as it emits its energy into space. This implies that the color temperature of its radiation, which is initially high, will gradually decrease and turn red. After using up all of their nuclear fuel, stars like the Sun become white dwarfs.
Thus, the white Dwarfs are a group of stars that are extremely bright and hot. Hence option A is correct.
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What is the proper compound formula for Hydrogen Cyanide?
A.) H(CN)2
B.) H2(CN)
C.) HCN
D.) H2(CN2)
Answer:
C
Explanation:
Cyanide's formula can be found either on google on on a reference table at the "polyatomic ions" table. Hydrogen, H, has a charge of 1+ when bonded, and cyanide has a charge of 1- overall, so they will be in a one to one ratio while bonded. As such, the equation is HCN.
What is the correct structure of an atom?
Why should we never change a symbol in chemistry?
Answer:
Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.
Explanation:
Write down the names of compounds represented by the following formulae:
a. Al2(SO4)3
b. CaCl2
c. K2SO4
d. KNO3
e. CaCO3
Hellp plss
The compounds have been formed by the combination of molecules and atoms. The names are a. aluminum sulfate, b. calcium chloride, c. potassium sulfate, d. potassium nitrate, and e. calcium carbonate.
What is the chemical formula?The chemical formula has been defined as the representation of the chemical compound or molecules with the aid of symbols, letters, and coefficients to show the proportions, arrows, parentheses, signs, etc.
The chemical formulas are named as:
Al₂(SO₄)₃ - aluminum sulfate. It has been used in purifying water, sewage treatment, tanning, paper industries, etc.CaCl₂ - calcium chloride. It is an ionic compound used in making electrolytes and sports drinks.K₂SO₄ - potassium sulfate. It has been used for making fertilizers for tobacco and vegetable crops.KNO₃ - potassium nitrate. It is an oxidizer used for making explosives and fertilizers.CaCO₃ - calcium carbonate. It is used as a dietary product to satisfy the needs for calcium and vitamin D for bone strengthening and formation.Learn more about chemical formulas, here:
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N yogurt de 125 g muestra en su etiqueta el contenido de algunas de sus sustancias nutricionales:¿Cuál es la composición en tanto porciento en masa de cada una de las sustancias? Composición Sustancia Masa Proteínas 5,5 g Azúcares 5,0 g Sodio 0,06 g Potasio 0,15 g
Answer:
Sustancia Masa (g) Composición (% m/m)
Proteínas 5,5 4,4
Azúcares 5,0 4,0
Sodio 0,06 0,048
Potasio 0,15 0,12
Explanation:
Para calcular la composición porcentual en masa de las sustancias debemos usar la siguiente ecuación:
[tex] \%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100 [/tex]
En donde:
[tex]m_{s}[/tex] es la masa de la sustancia
[tex]m_{sol}[/tex] es la masa del yogurt = 125 g
Para las proteínas:
[tex] \%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100 = \frac{5,5 g}{125 g} \times 100 = 4,4 \% [/tex]
Para los azúcares:
[tex] \%_{m/m} = \frac{5,0 g}{125 g} \times 100 = 4,0 \% [/tex]
Para el sodio:
[tex] \%_{m/m} = \frac{0,06 g}{125 g} \times 100 = 0,048 \% [/tex]
Para el potasio:
[tex] \%_{m/m} = \frac{0,15 g}{125 g} \times 100 = 0,12 \% [/tex]
Espero que te sea de utilidad!
Question 1 of 10
What would you need to do to calculate the molality of 10 mol of NaCl in 200
mol of water?
A. Convert the 200 mol of water to kilograms of water.
B. Convert the 200 mol of water to liters of water.
C. Convert the 10 mol of NaCl to grams of NaCl.
O D. Convert the 10 mol of NaCl to kilograms of NaCl.
SUBMIT
Answer:
A. Convert the 200 mol of water to kilograms of water.
Explanation:
To find the molality of 10mol of NaCl in 200mol of water, convert the 200mol of water to kilograms of water.
Molality is one of the several ways of measuring concentration of a solute in a solvent;
Molality = [tex]\frac{number of moles of solute}{mass of solvent}[/tex]
To solve this problem, simply convert the 200mole to mass of water.The Principle Quantum Number describes what aspect of electron orbitals?
a) shape.
b) orientation.
c) spin.
d) energy level.
Answer:
C
Explanation:
Because that's the spin in its orbitals.
I 6) Ca(OH)2 + 2HCl -----> CaCl2 + 2H2O How many molecules of calcium chloride are produced by the combination of 3.5x1024 molecules of hydrochloric acid with excess calcium hydroxide?
Answer:
go for what ever brother GUESS / imagine this gate brainlyist for literally doing nothing.
Explanation:
Which of the following is a inert gas?
oxygen
chlorine
nitrogen
aragon
Answer:
argon is an inert gas
Explanation:
an inert gas is when a chemical helium, xenon, neon, krypton, radon are also inert gases
Robert Hooke used a microscope to observe tiny spaces in
dead cork bark.
What did his observations lead to the discovery of?
A. Bacterial cells
B. Plant cells
C. Cell division
D. Cell organelles
Explanation:
B. Plant cells is the correct answer
Answer:
plant cells cause the plant cells was his first discorvery
What is the mass of 2.23 x 10^23 atoms of sulfur?
Answer: 32.07 g/mole
Explanation:
1 mole of sulfur contains 6.022 ×10^23 atoms
1 mole is equal to 32.07 g
6.022 ×10^23 atoms = 32.07
A compound composed of only C and H contains 79.88 % C by mass. What is its empirical formula?
C a CH 3
Ob.CH 2
Oc CH 4
0 0 CH
Оe. Сэн
Answer:
a. CH3
Hope this helps.
Determine the number of protons, neutrons, and electrons for a neutral potassium-41 isotope.
which other metal can substitute (in place of) iron explain you answer.. Aluminum, copper or iron?
Answer+Explanation:
Titanium ( in place of iron)
Titanium could be an excellent replacement for iron when it comes to tensile strength versus weight. It would be the first choice as a building material metal and building skeletons/bridges would use titanium instead of iron.
Magnesium alloys (in place of aluminum)
Magnesium alloys potentially met the present demands for lighter and reliable construction. With comparable specific stiffness, higher specific strength and energy absorption magnesium alloys have the potential to replace steel and aluminum alloys.
aluminum (in place of copper)
Most non-copper metal cabling is aluminum, and it is often used in areas where copper is not a likely alternative. However, it is used more now as a replacement than it has ever been. It is cheaper than copper, and its relative density allows for more cable to be made from a ton of aluminum than a ton of copper.
hope it helps you
A special layer of dermal cells are found on the top side of leaves. What level of organization would it belong to
Answer:
Tissue level of organization
Explanation:
The various levels of the organization of life are as follows:
Cells: a cell is the basic unit of ife
Tissues; A tissue is a group of cells with a common origin. performing similar functions.
Organ: an organ is a group of tissues with varied or similar function that work together to perform a specific function.
System: a system is a group of different organs that work together in the body to perform a specific function.
Since, the leaf is an organ in the plant that performs the function of photosynthesis, the group of dermal cells found on the leaf are in the tissue level of organization, they perform the function of protection for the leaf.
hi pls help me I don't get it
Answer:
It's most probably
A non metal
Global warming is mainly due to
CFC's
Ozone Holes
Nitric and sulfuric acids
Greenhouse gases
Answer:
Explanation:
Glaciers are melting, sea levels are rising, cloud forests are dying, and wildlife is scrambling to keep pace. It has become clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than at any time in the last 800,000 years.
We often call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. While many people think of global warming and climate change as synonyms, scientists use “climate change” when describing the complex shifts now affecting our planet’s weather and climate systems—in part because some areas actually get cooler in the short term.
Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a range of other impacts. All of those changes are emerging as humans continue to add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that all living things have come to rely on.
What will we do—what can we do—to slow this human-caused warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the fate of the Earth as we know it—coasts, forests, farms, and snow-capped mountains—hangs in the balance.
Ammonia (NH3) is widely used as a fertilizer
and in many household cleaners. How much
ammonia is produced when 3.55 mol of hydrogen gas react with an excess of nitrogen
Answer:
Mass of ammonia produced = 40.29 g
Explanation:
Given data:
Number of moles of H₂ = 3.55 mol
Mass of ammonia produced = ?
Solution:
Chemical equation:
3H₂ + N₂ → 2NH₃
Now we will compare the moles of ammonia with hydrogen
H₂ : NH₃
3 : 2
3.55 : 2/3×3.55 = 2.37 mol
Mass of ammonia:
Mass = number of moles × molar mass
Mass = 2.37 mol × 17 g/mol
Mass = 40.29 g