A solution is a mixture ____. Select one: a. from which the solute can be filtered b. that has the same properties throughout c. that is heterogeneous d. in which a solid solute is always dissolved in a liquid solvent Clear my choice Check
A solution is a mixture in which a solid solute is always dissolved in a liquid solvent
Ice that contains a small amount of dissolved air is an example of what type of solution?
Answer:
a gas dissolved in a solid
Explanation:
The ice that comprise of small amount of dissolved air represent the type of soluton that have a solid dissolved in a gas.
What is gas?Gas could be considered as the one of the four fundamental states of matter.
A pure gas should be made of individual atoms, elemental molecules that consist from one type of atom, or compound molecules that consist of a variety of atoms.
A gas mixture could be in the form of air that comprise a variety of pure gases.
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There is 1 mole of propane (C3H8) for every 3 moles CO2. How many moles of CO2 would there be if you started with 2 moles of propane instead of 1?
Answer:
[tex]1 \: mole \: of \: propane \: reacts \: with \: 3 \: moles \: of \: carbondioxide \\ 2 \: moles \: of \: propane \: react \: with \: \frac{2 \times 3}{1} moles \\ = 6 \: moles \: of \: carbondioxide[/tex]
At 304 K, a 9.6 L tank contains 1.9 moles of H2 gas under an unknown pressure in atm. What is the pressure of the gas in the tank? (R = 0.0821 L*atm/mol*K)
Answer:
The pressure is 4.939 atm
Explanation:
As we know
PV = nRT
where P is the pressure
V is the volume
n is the total number of moles
R is the gas constant
and T is the temperature
Substituting the given values we get -
[tex]P * 9.6 = 1.9 * 0.0821 *304\\P = 47.420/9.6\\P = 4.939[/tex]
The pressure is 4.939 atm
Answer:
4.9 atm
Explanation:
Use the following periodic table to identify the letter(s) that match each of the statements below.
(Each element may be used once, more than once or not at all)
Answer:
l and t
Explanation:
because they are in group one
Answer:
L & T
since are found in the same group.
When the pressure is 1.22 atm, a sample of hydrogen gas has a volume of 1.88L. What is its volume if the pressure is increased to 1.45 atm?
Answer:
1.58 L
Explanation:
Use Boyle's law, which is defined as
p1v1 = p2v2
In this case we're solving for V2 because the rest of the variables are given.
p1 = 1.22 atm
v1 = 1.88L
p2 = 1.45 atm
v2 = ?
p1v1 = p2v2
(1.22 atm)(1.88L) = (1.45 atm)(v2)
v2 = (1.22 atm)(1.88L) ÷ (1.45 atm) = 1.58 L
What is the process when enzymes (chemicals) in your saliva help breaks down food while chewing?
A. Mechanical digestion
B. Chemical digestion
C. Both
D. None of the above
Answer:
B. Chemical Digestion
Explanation:
As food travels from your mouth into your digestive system, it's broken down by digestive enzymes that turn it into smaller nutrients that your body can easily absorb.
In the combined gas law if a variable is not constant you can remove it from the equation to reveal the gas law you need to solve a problem? True or false?
Answer:
False
Explanation:
how can hydrogen gas be tested?
Answer:
Burning splint test
A splint is lit and held near the opening of the tube, then the stopper is removed to expose the splint to the gas. If the gas is flammable, the mixture ignites. This test is most commonly used to identify hydrogen, which extinguishes with a distinctive 'squeaky pop' sound. brainliest please
i just need the answers!!!
Answer:
16:A
17:C
18:A
19B
Explanation:
Which equation represents a neutralization reaction?
A. NaOH + HCl → NaCl + H2O
B. 2 Na + 2 H2O → 2 NaOH + H2
C. AgNO3 + NaCl → AgCl + NaNO3
D. Fe + CuSO4 → FeSO4 + Cu
The equation represents a neutralization reaction is : -
A. NaOH + HCl → NaCl + H2O
In neutralization reaction acid and base reacts to form salt and water,
here,
acid - HCLbase - NaOH Salt - NaClwater - H2OThe equation NaOH + HCl → NaCl + H2O represents neutralization reaction.
What is neutralization reaction?The process usually happens when an acid combines with just a base to create water and salt is known as neutralization. Solid acids, solid bases, solid salts, and water all have net ionic equations in neutralization reactions.
The given equation is NaOH + HCl → NaCl + H2O.
Here, NaOH = Base, HCl = acid and NaCl = salt.
Therefore, the given equation is neutralization reaction.
To know more about neutralization reaction.
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how long ago did the Atlantic Ocean separate Canada from Ireland....plz answer I have no idea lol
Answer:
Around 150 million years ago
Explanation:
The Atlantic ocean was formed during the Jurassic period
Answer:
200 millon years ago
Explanation: please give me brainliest
Carbon is often called "the building block of life". If your body is 18% carbon, what mass
of this element is present in your body?
Answer:
oxygen
Explanation:
I am pretty sure it is that but you should still check
What is the difference between pH and pOH?
Answer:
pH measures ratio of H+ ions to OH- ions of substances
pOH measures ratio of OH- ions to H+ ions of substances
Explanation:
pH is a scale which measures the ratio of H+ ions to OH- ions to identify how acidic or basic a substance is. This is because acidic substances have high amounts of H+ ions and low amounts of OH- ions, and therefore have a higher ratio of H+ to OH- ions. (And vice versa for bases, low H+ to OH- ratio) On a pH scale, acidic substances have a pH of 0 to 7, water (neutral pH, not acidic nor basic) has a pH of 7, and bases have a pH of 7-14.
pOH is very similar to pH but measures the opposite: the ratio of OH- ions (indicative of a base) to H+ ions (indicative of an acid). Therefore the pH values are reversed on the scale: Basic substances have pOHs below 7, and acidic substances are above 7 on the pOH scale.
Fundamentally, these two scales measure the same thing is the same way, one just measures the ratio one way (H+:OH-), while the other measured them the other way (OH-:H+), resulting in flipped values on the scales:
pH: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
<---Acidic---> <------Basic------->
pOH: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
<----Basic----> <-----Acidic------->
Hope this helped!
An apple appears red when struck by white light. This appearance is because the red light is reflected and the other colors are absorb. What color will this apple appear to be when struck by blue yet.
A. black
B. blue
C. red
D. white
you had a 5 gram sample , how much of the original substance would remain after 1 half- life?
what is the half life though?
need help on dis plz that would be big help
Identify the base in this acid-base reaction: 2 upper H upper C subscript 2 upper H subscript 3 upper O subscript 2 plus upper M g (upper O upper H) subscript 2 right arrow upper M g (upper C subscript 2 upper H subscript 3 upper O subscript 2) subscript 2 plus 2 upper H subscript 2 upper O. HC2H3O2 Mg(OH)2 Mg(C2H3O2)2 H2O
Answer:
Mg(OH)2
Explanation:
Magnesium hydroxide is the base since it has hydroxyl ions.
Mg(OH)₂ is the base in this acid-base reaction.
What is a Base?This can be defined as a chemical substance which donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution.
Mg(OH)₂ has the presence of hydroxide (OH-) ions in its compound which was why it was chosen as the most appropriate choice.
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A ______ in medicine is a form of scientific argumentation in which evidence is used to rule out claims and support the best conclusion.
fill in the blank
Answer: Scientific reasoning
Explanation:
A scientific reasoning can be defined as the justification which connects the evidence with that of the claim and it rules out all those claims that are not supported by any evidence. It explains the fact that how evidence can support a claim and scientifically acceptable conclusion can be drawn. An argument is always based on one or more claims which can either be true or evidentially proved.
zA 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 12.5 mL of the base is added. The concentration of acetic acid in the sample was ________ M. A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 12.5 mL of the base is added. The concentration of acetic acid in the sample was ________ M. 0.365 0.119 0.0875 0.175 none of the above
Answer:
0.0875M of Acetic Acid
Explanation:
Based on the reaction of acetic acid (HX) with sodium hydroxide (NaOH):
HX + NaOH → NaX + H₂O
1 mole of acetic acid reacts with 1 mole of NaOH
That means the moles of sodium hydroxide added = Moles the acetic acid at the equivalence point.
To solve this question we have to find the moles of NaOH = Moles HX. With the moles and the volume (25.0mL = 0.0250L) we can find the molarity of the acetic acid:
Moles NaOH = Moles Acetic acid:
12.5mL = 0.0125L * (0.175mol / L) = 0.00219 moles Acetic Acid
Molarity acetic acid:
0.00219 moles Acetic Acid / 0.0250L =
0.0875M of Acetic AcidDetermine the mass of MgCl2 needed to create a 100. ml solution with a concentration of 3.00 M.
Explanation:
[tex]1000ml \: contain \: 3 \: moles \\ 100 \: ml \: will \: contain \: ( \frac{100 \times 3}{1000} ) \: moles \\ = 0.3 \: moles \\ RFM = 95 \\ 1 \: mole \: weighs \: 95 \: g \\ 0.3 \: moles \: weigh \: ( \frac{(0.3 \times 95)}{1} \: g \\ = 28.5 \: g \: of \: magnesium \: chloride[/tex]
How many atoms are in 1.204x10^22 moles of arsenic?
Answer:
0.02 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{1.204 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.02[/tex]
We have the final answer as
0.02 molesHope this helps you
A 50.5 L flask contains 3.25 mol of an unknown gas at 288.6 K, what is the pressure of
this gas?
Answer:
1.52atm is the pressure of the gas
Explanation:
To solve this question we must use the general gas law:
PV = nRT
Where P is pressure in atm = Our incognite
V is volume = 50.5L
n are moles of gas = 3.25moles
R is gas constat = 0.082atmL/molK
And T is absolute temperature = 288.6K
To solve pressure:
P = nRT / V
P = 3.25mol*0.082atmL/molK*288.6K / 50.5L
P = 1.52atm is the pressure of the gas
A _ is a substance with a pH greater than 7
BASIC
bc here:
1,2,3,4,5,6. 7. 8,9,10
The ones in bold are acids.
7 is neutral.
The ones in italic are basic.
Which wave has the highest frequency?
1
2
3
4
no link or i will report
Answer:
4
Explanation:
because number 4 moves continuous
I'm like a highway system in your body. I carry necessary supplies to the parts of your body that need llen, allu
carry away wastes so your body can get rid of them. I contain blood vessels and am a system with a lot of heart.
What system am I?
1:digestive system
2:circulatory system
3: muscular system
4:skeletal system
plssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss sssssssssssssssssss sssssssssssssssssss sssssssssssssssssss sssssssssssssssssss answer this correctly
Answer:
The circulatory system
Explanation:
Hope this helps
Explain why crystallisation can't be used to prepare calcium carbonate.
Explanation:
The mechanisms by which amorphous intermediates transform into crystalline materials are poorly understood. Currently, attracting enormous interest is the crystallization of amorphous calcium carbonate, a key intermediary in synthetic, biological, and environmental systems. Here we attempt to unify many contrasting and contradictory studies by investigating this process in detail. We show that amorphous calcium carbonate can dehydrate before crystallizing, both in solution and in air, while thermal analyses and solid-state nuclear magnetic resonance measurements reveal that its water is present in distinct environments. Loss of the final water fraction—comprising less than 15% of the total—then triggers crystallization. The high activation energy of this step suggests that it occurs by partial dissolution/recrystallization, mediated by surface water, and the majority of the particle then crystallizes by a solid-state transformation. Such mechanisms are likely to be widespread in solid-state reactions and their characterization will facilitate greater control over these processes.
The intermolecular forces present between two molecules ofCH3-CH2-CH2-CH2-CH2-O-H are ________.
Answer:
Hydrogen Bonding!
This is because of two reasons:
1. Hydrogen is attatched to a very electronegative atom.
2. The electronegative atom it is attatched to has a lone pair.
Hope this helps!
I would really appreciate if you mark me brainliest as I have been trying to get there for a veryyy long time now :)
16. Which of the following have the same electron configuration as each other?
1. Na+1 and Ar
2. Na+1 and Ne
3. Na and Ne
4. Na and Na+1
Answer:3
Explanation:
Answer:3
Explanation:
O nióbio é um metal encontrado em jazidas naturais, principalmente na firma de óxidos. Em uma jazida que contenha nióbio com número de oxidação +5, a formula do óxido predominante desse metal corresponde a:
Answer:
what
Explanation:
In the chemical laboratory, why do scientists use a mortar and pestle?
A. To increase surface area of a solute
B. To decrease surface area of a solute
C. To increase temperature of a solute
D. To decrease temperature of a solute
Answer:
A. To increase surface area of a solute
Explanation: