Which of the following is a reasonable way of describing the density of a gas at STP
Answer:the answer is a
Explanation:
The density of a gas at standard temperature and pressure conditions is 1.40 grams per liter.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.These values are important to physicists, chemists ,engineers ,pilots and navigators.
Learn more about standard temperature and pressure,here:
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A tank contains helium gas at 585 mmHg, nitrogen gas at 0.76 atm, and neon at 940 torr. What is the total pressure
Answer:
2.77 atm
Explanation:
The total pressure of a mixture of gases is calculated as the addition of the partial pressures of the gases. In this case, the total pressure (Pt) is calculated from the partial pressures of helium (PHe), nitrogen (PN₂) and neon (PNe):
Pt = PHe + PN₂ + PNe
First, we have to convert the partial pressures to the same unit (atm). For this, we have to know that 1 atm=760 mmHg=760 Torr
PHe = 585 mmHg x 1 atm/760 mmHg = 0.77 atm
PN₂= 0.76 atm
PNe= 940 Torr x 1 atm/760 Torr = 1.24 atm
Finally, we calculate the total pressure in atm:
Pt = 0.77 atm + 0.76 atm + 1.24 atm= 2.77 atm
click on the picture of the flowers until their colors correspond to the punnett square above. HELP PLZ!
Answer:
You will need to have a red flower in the top left, a pink flower in the top right and bottom left, and a white flower in the bottom right.
Explanation:
This flower appears to express color through codominance, which means that both genes express themselves. "R" is the dominant gene for red, and "r" is the recessive gene for white. When a flower has RR genotype, the phenotype will be a red flower. When a flower has an Rr genotype, the red and white genes will both be expressed and the phenotype will be pink. When a flower has an rr genotype, it lacks the red gene and will therefore be only white.
True or false force cannot be measured
Answer:
False
Explanation:
Answer:
true
Explanation:
i dont know if you want more info on how it is true just tell me if you do and i will add it in
please help and show work
What is the volume of 5.7 moles of Hydrogen gas?
How do the valency and the atomic size of the element vary while going from left to right along a period in The modern periodic table?
Answer:
Atomic size decreases on going along a period from left to right because the electron enters into the same shell, therefore, attraction between nucleus and outermost electron increases and thus atomic size decreases. Valency first increases from 1 to 4 and then decreases from 4 to GO along a period from left to right.
Answer:
kha gya vo chasmis ........
A student wanted to study the effect of temperature on algae levels in a
local stream. Which items are most useful for gathering data and most
appropriate for communicating the results of her observations?
Select one:
Microscopes and written descriptions of weather patterns
Research on the Internet and videotapes of water samples
pH strips and written observations of stream water
Test tubes, thermometers, and graphs of results
Answer:
pH strips and written observations of stream water
Explanation:
When u place an iron nail in basin of water and leave it for two days what is formed in the iron nail
Answer:
When you place an iron nail in a basin of water and leave it for two days, what will happen to the iron nail? It will form rust on the surface of the nail. Rust forms when iron combines with oxygen to form iron oxide.
Explanation:
Assuming they were clean of rust to begin with, and are made of an ordinary steel - they start to rust - will turn orange, and the orange sediment...
Not much if any while it's in the water for that period of time. However once you remove it then it will be exposed two oxygen and will start to ox...
If it is not coated properly It will form Rust .
3. Matter with a composition that is always the same is a(n)
substance
mixture
compound
Answer:
substance
Explanation:
A pure substance is a form of matter that has a constant composition (meaning it's the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc
Which of the following is not a type of mechanical wave?
Question 3 options:
surface
concave
transverse
longitudinal
Answer:
concave
Explanation:
From this list below, select the items which are properties of ionic compounds. * 5 points low melting point conductors of electricity when in liquid or aqueous state high melting point mostly liquids and gases at room temperature soluble in water
Answer:
conductors of electricity when in liquid or aqueous state
high melting point
soluble in water
Explanation:
An ionic substance is any substance that is composed of two ions of opposite charge.
In the solid state, ionic substances do not conduct electricity because the ions are trapped inside the crystal. When in liquid state or in aqueous solution, these ions are now free and the solution becomes an electrolyte.
All ionic substances have a very high melting point and dissolve in water easily.
How do I balance Ga(NO3)3 + Hg2(Cl2) -> Hg2(NO3)2 + Ga(Cl)3
Answer:
2Ga(OH)3 + 3Hg2Cl2 → 6Hg(OH) + 2GaCl3
Explanation:
Answer: 2Ga(OH)3 + 3Hg2Cl2 → 6Hg(OH) + 2GaCl3
reaction type: Double Displacement
A 500-gram block of solid cheese is melted in a pot. Which is most likely be the mass of the cheese after it is melted?
pleaseeeeeeeeee answer
Answer:
due to the law of conservation of mass, the mass would stay the same.
Difference between modern periodic table and medeelves periodic table
Answer:
The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.
Explanation:
what is the atomic number of sulfur is.
Answer:
16
Explanation:
Answer:
16 hopes this will help you
Explanation:
16 hope this helps
Determine the rate of a reaction that follows the rate law:
rate = k[A]”[B]", where:
k= 1 x 10-2
[A] = 2 M
[B] = 3 M
m = 2
n = 1
A. 0.12 (mol/L)/S
B. 0.36 (mol/L)/S
C. 0.06 (mol/L)/s
D. 6.0 (mol/L)/S
you started out as a single felled zygote.
what process changed you into a person with billions of cells
Answer:
The cell goes through the cell cycle/mitosis
Explanation:
The cell cycle is basically the process of dividing
G1 phase is where the cell grows in size, and make sure that everything is ready to divide.
Synthesis or the S phase is where the cell copies its DNA.
G2 phase is where the cells check that all its DNA has been correctly copied.
Mitosis or M phase, where the cell finally divides in two. If the cells keep on dividing exponentially, they will become billions of cells.
What number is equal to the amount of protons
and neutrons on the periodic table?
Answer:
The mass number
Explanation:
The mass number of an atom is its total number of protons and neutrons.
I hope this helps a bit.
Torn paper vs burned paper?
Coloring leaves in a coloring book vs leaves turning colors during fall and winter?
Describe the physical and chemical changes of each......
Answer:
physical- torn paper, coloring leaves in a coloring book
chemical- burned paper, leaves turning colors during fall and winter
Explanation:
Which, if any, of the following is named incorrectly? *
A) FeSO4; iron (II) sulfate
B) Fe(OH)2; iron (III) hydroxide
C) K3P; potassium phosphide
D) Sn3(PO4)4; tin (IV) phosphate
Answer:
I think it is either a or b
Explanation:
c or d has the correct names and Roman numerals.
how many mols are in 100.g of Fe?
Answer:
1.79 moles
Explanation:
1.79 moles
1.79 moles
1.79 moles
1.79 moles
Answer:1.79 moles
1.79 moles are there in 100g of iron.
Explanation:
thats the answer for it
18.
react to cause chemical reactions
Protons
Neutrons
Electrons
Where does the 'Equiv' come from?
Explanation:
Equiv means equivalent ...
Explain the differences between bronze and brass, and steel and cast iron. Which is best used for cooking wares?
Answer:
Steel and cast iron
Explanation:
They are all metal but assuming that you are finding the best material for your pan i suggest going for steel or cast iron
NEED HELP ASAP!!!!
Which process do scientists think provided Earth with an oxygen-rich atmosphere?
radiometric dating
spontaneous generation
photosynthesis
respiration
Answer:
photosynthesis
Explanation:
took the test
which alkaline earth metal is a component of gypsum
Answer:
calcium is the correct answer :)
What is the empirical formula a for a compound that is 15.3% magnesium, 44.5% chlorine, and 40.2 % oxygen
Answer:
[tex]MgCl_{2} O_{4}[/tex]
Explanation:
When calculating an empirical formula from percentages, assume you have a 100g sample. This allows you to convert the percentages directly to grams, because X % of 100g is X grams.
So:
15.3 % = 15.3g Mg, 44.5% = 44.5g Cl, 40.2% = 40.2g O
The next step is to divide each mass by their molar mass to convert your grams to moles.
15.3/24.3 = .630 mol
44.5/35.5 = 1.25 mol
40.2/16.0 = 2.5 mol
Then you will divide all of your mol values by the SMALLEST number of moles. This gives you whole numbers that are the mole ratio (subscripts) of the empirical formula.
.630 mol/.630mol = 1
1.25 mol/.630mol = 2
2.5 mol/.630mol = 4
So the empirical formula is
[tex]MgCl_{2} O_{4}[/tex]
Many angiosperms rely on animals for
A fertilization
B pollination
C photosynthesis
D transpiration
how many atoms are there in 6 molecules of water
Answer:
three atoms = 1 water molecule
3 × 6 = 18 atoms
................
as the temperature in a pressure cooker rose from 383 k to 431 k, the pressure rose to 1.16 atm. what was the original pressure of the cooker? plz name the gas law as well
Answer:
1.031atm
Explanation: