Answer:
NH3 + H2O → NH4+ + OH-
Explanation:
Ammonia, NH3 can act as a base in water (H2O), which serves as the acid, as follows;
NH3 (aq) + H2O (l) → NH4OH (aq)
According to Bronsted–Lowry acid–base theory, NH4+ (ammonium) is the conjugate acid because it can lose hydrogen ion to form the base while OH- is the conjugate base because it can gain hydrogen ion to form the acid. The balanced ionic equation is as follows;
NH3 + H2O → NH4+ (aq) + OH- (aq)
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
This refers to the most powerful means of communicating confidence and conviction A.Posture B.eye contact C.body movement
please
please
please
please
ples
please
please
please help me
Answer:
c
Explanation:
the way you move explains how confident you are
How many Oxygen atoms are in 2NA(OH)3
Answer:
3 oxygen atom
hope it helps.
Answer:
Explanation:
There are 3 oxygen atoms.
have a nice day!Can you choose me brainliest?
Which could be the pH of an aqueous solution with a H3O+ ion concentration that is less than its OH- ion concentration?
A. 2
B. 3
C. 4
D. 9
Answer:
Explanation:
You can think of pH as "parts Hydrogen ion," but remember that the pH scale is "backwards." The pH scale ranges from 0 to 14, with zero being the most acidic (highest concentration of H+) and 14 being the most basic.
The pH of an aqueous solution will be:
D. 9
When the [tex]H_3O^+[/tex] ion concentration is less than its [tex]OH^-[/tex] ion concentration.
What does pH tell?pH is used to indicate whether a solution is acidic or alkaline depending upon the pH of the solution. If pH is below 7 then the solution is acidic, if the pH is above 7 then the solution is basic and if the pH is 7 then the solution is neutral.
When the [tex]H_3O^+[/tex] ion concentration is less than its [tex]OH^-[/tex] ion concentration this means that the solution has more [tex]OH^-[/tex] ion and this makes the solution basic.
Thus, correct option is D, i.e. pH is 9.
Find more information about pH here:
brainly.com/question/24595796
This protein takes oxygen from hemoglobin in order to
O break down stored fats for energy.
O transport water-insoluble lipids in the bloodstream.
transport oxygen from the lungs to tissues around the body.
O store it for muscle cells.
Answer:
i'm pretty sure it's 'transport oxygen from the lungs to tissues around the body'
Answer:
Transportation of Oxygen from Lungs to Tissues
Match each chemical reaction with the type of reaction that best describes it
Explanation:
Types of Chemical ReactionCombination Reaction.Decomposition Reaction.Displacement Reaction.Double Displacement Reaction.Oxidation and Reduction Reaction.stay safe healthy and happy.Determine 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]
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.
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:
Identify the element that cannot participate in nuclear fission reactions. (Hint: Think about the size of the atom.)
A.
hydrogen
B.
uranium
C.
thorium
D.
plutonium
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:
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.
learn more about gas here: https://brainly.com/question/17488113
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
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 AcidIn 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:
At 40 mph, how long does it take to travel 64 miles
Which gas would you expect to have the fastest diffusion rate?
A. Ammonia (NH3)
B. Oxygen (O2)
C. Nitrogen (N2)
If you were to add salt to water , what temperature would you expect it to boil? Assume you’re at sea level
100 c
More than 100 c
Less than 100 c
Answer:
100c
Explanation:
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 :)
A 5.00 mL sample of hydrochloric acid is titrated with 0.1293 M ammonia (a base). If the titration required 28.15 mL of ammonia, determine the following:
the original concentration of the acid
the original pH of the acid
Answer:
1. C = 0.73 M.
2. pH = 0.14
Explanation:
The reaction is the following:
HCl + NH₃ ⇄ NH₄⁺Cl⁻
From the titration, we can find the number of moles of HCl that were neutralized by the ammonia.
[tex] n_{a} = n_{b} [/tex]
Where "a" is for acid and "b" is for base.
The number of moles is:
[tex] n = C*V [/tex]
Where "C" is for concentration and "V" for volume.
[tex] C_{a}V_{a} = C_{b}V_{b} [/tex]
[tex] C_{a} = \frac{0.1293 M*28.15 mL}{5.00 mL} = 0.73 M [/tex]
Hence the initial concentration of the acid is 0.73 M.
The original pH of the acid is given by:
[tex] pH = -log([H^{+}]) [/tex]
[tex] pH = -log(0.73) = 0.14 [/tex]
Therefore, the original pH of the acid is 0.14.
I hope it helps you!
Describe at least 3 phases of thr water cycle and make sure to explain The state of matter of water at each of the phases
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
What are the different types of excretion?
Answer:
There are 4 excretory organs in human: The skin, the lungs, the liver, and the kidney (Urinary system). The skin excretes the sweat outside the body through numerous pores in the surface of this organ. Sweat is a mixture of three metabolic wastes: water, salts, and urea.
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.
The table shows data about abiotic factors of streams in two different watersheds.
In general, a stream with a lower temperature and more neutral pH tends to be
healthier. Based on these criteria, which watershed contains the healthier
stream?
Answer:
B
Explanation:
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]
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
If there are 3.0 liters of gas at a pressure of 2.0 atm at constant temperature, what is the pressure if the volume is reduced by one half?
Answer:
The pressure is doubled, 4.0atm
Explanation:
Based on Boyle's law, the pressure of a gas is inversely proportional to its volume at constant temperature. The equation that describes this law is:
P1V1 = P2V2
Where P is pressure and V volume at 1, initial state and 2, final state of the gas.
Computing the values of the problem:
P1 = 2.0atm
V1 = 3.0L
P2 = ?
V2 = 3.0L / 2 = 1.5L
Replacing:
2.0atm*3.0L = P2*1.5L
6.0atmL / 1.5L = P2
4.0atm = P2
The pressure is doubled, 4.0atmA 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
you had a 5 gram sample , how much of the original substance would remain after 1 half- life?
what is the half life though?