Answer:
3.2x10⁻⁶M of sulfate ion can be added
Explanation:
The solubility of SrSO4 is:
SrSO4(s) → Sr²⁺(aq) + SO₄²⁻(aq)
Where Ksp is defined as:
Ksp = 3.2x10⁻⁷ = [Sr²⁺] [SO₄²⁻]
The concentration of Sr is:
0.10mol / 1L = 0.10M = [Sr²⁺]
Replacing in Ksp:
3.2x10⁻⁷ = [0.10M] [SO₄²⁻]
[SO₄²⁻] = 3.2x10⁻⁶M of sulfate ion can be added
1. If 2 moles of hydrogen combine with one mole of oxygen, how many moles of water are
produced?
4. How is ethanol made?
A. By fermenting sugars and starches
B. By composting grass cuttings and dinner table scraps
C. By boiling water and corn oi
D. By releasing carbon dioxide into the atmosphere
O
Wetlands provide habitats for many living things because of their sheltered waters and what other feature?
Answer:
large supply of nutrients.
Explanation:
In a wetland, the soil is covered by water or is almost covered by water. This water may be coming upwards from an underground aquifer. Wetlands are covered by water for most of the year.
They are sheltered waters and do provide habitats for many living things.
Nutrients such as; Carbon sulfur, phosphorus, carbon, and nitrogen are cycled within the soil of wetlands hence wetlands have a large supply of nutrients.
show the hybridization of co2
Answer:
Hybridization of CO2 (Carbon Dioxide)
How is wind speed indicated? What is the unit used to define wind speed?
Answer:
AnemometerknotExplanation:
Instrument used to measure wind speed are known as anemometer and can record wind speed, direction, and strength. The normal unit of wind speed is knots (nautical miles per hour)
If you produce 35.7 grams of sodium chloride how many molecules of Chlorine gas were
needed?
2Na + Cl2 --> 2NaCl
(PLS HELP)
Answer: [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas are needed.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of sodium chloride = 35.7 g
Molar mass of sodium chloride = 58.44 g/mol
Plugging values in equation 1:
[tex]\text{Moles of sodium chloride}=\frac{35.7g}{58.44g/mol}=0.611 mol[/tex]
The given chemical equation follows:
[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]
By the stoichiometry of the reaction:
If 1 mole of sodium chloride is produced from 2 moles of chlorine gas
So, 0.611 moles of sodium chloride will be produced from = [tex]\frac{2}{1}\times 0.611=1.222mol[/tex] of chlorine gas
According to the mole concept:
1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of molecules
So, 1.222 moles of chlorine gas will contain = [tex]\frac{6.022\times 10^{23}}{1mol}\times 1.222mol=7.36\times 10^{23}[/tex] number of molecules
Hence, [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas is needed.
Unit Test Review
Active
1
2
3
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to
another?
O The volume and the shape stay the same.
O The volume increases to fill the new container, but the shape stays the same.
O The volume stays the same, but the shape changes to fit the new container
O The volume and the shape change to fill the new container
Answer:
the volume stays the same, but the shape changes to fit the new container
Explanation:
because the same amount/volume of liquid is being placed in a new container, the new container has a different shape to the old, thus changing the liquids shape but not volume.
How many particles are in 7.07x10^-6 moles of a substance?
Answer:
4.25*10^18
Explanation:
1 mole =6.023*10^23 particles
so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles
. Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9.
To which group in the Periodic Table does it belong?
a ] I
B] III
C] VII
D] 0
Answer:
C
Explanation:
it belong to that group as it needs 1 electron to be chemically stable
Differentiate between breathing and respiration using three differences
Answer:
breathing is inhaling and exhaling of gases between the cells in the environment.
respiration is the biochemical process that happens in the cell. this process releases energy from organic compounds that are then used for performing activities
Explanation:
A mixture of He, Ne, and N2 gases has a pressure of 1.943 atm. If the pressures of He and Ne are 0.137 atm and 0.566 atm, respectively, what is the partial pressure of N2 in the mixture?  A. 0.703 atm  B. 1.24 atm  C. 0.151 atm  D. 1.943 atm
Answer:
The parcial pressure of N₂ in the mixture is 1.24 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=PHe + PNe + PN₂
You know:
PT= 1.943 atmPHe= 0.137 atmPNe= 0.566 atmPN₂= ?Replacing:
1.943 atm= 0.137 atm + 0.566 atm + PN₂
Solving:
1.943 atm= 0.703 atm + PN₂
1.943 atm - 0.703 atm= PN₂
1.24 atm= PN₂
The parcial pressure of N₂ in the mixture is 1.24 atm.
Too much Carbon Dioxide in the atmosphere is a bad
thing. However, too little is also bad. Explain why it is important
for Carbon Dioxide to always exist in the atmosphere. Give specific examples of what it is used for to support your response.
Answer:
CO2 is an evil necessary element. co2 is needed for our survival. we need food for survival and food is produced by the plants through photosynthesis. for photosynthesis to take place co2 is one of the vital element. so no co2,no photosyntheseis maeans no food. no food no one will survive.
Please answer correctly I still need help on this. I will give brainliest (No links or fake answers will receive no brainliest)
How many grams of AlCl3 are needed to completely react with 2.25 of NaOH?
Hope the picture help u understand I did it in steps so it would be easier to understand:)
[tex]what \: is \: sound \: \: {?} [/tex]
Answer:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.
Explanation:
this is what i found hope it helps :)
Answer:
Sound is a form of energy which is caused due to the vibration of an object.
Which type of energy transfer allows the Sun to warm Earth?
C. Radiation is the answer.
As it can happen in vacuum also
Answer: Radiation
Explanation:
Question 4 of 10
Which molecule is hexanal?
ОА, НС
ОН
В.
||
Ос. Н?
нсон
D.
Answer:
Hexanal, once commonly called caproic aldehyde, is a six-carbon straight-chain aldehyde. It is a clear liquid with an atmospheric-pressure boiling point of 131 ºC
Answer:
the answer is B the biggest one
Explanation:
Assume that the variables x and y are directly related. If k= 8, what is the value for each of the following points? Be sure and record your data to be used in the following problem. ху 0.5 00 1 < 8 2. 80 3
Answer:
Explanation:
To be honest I reallydont know their but hope u get ur answer
Answer:
0.5= 16
1 =8
2=4
3=2.66
Explanation:
A metallic bond is formed when
Answer:
A metallic bond is formed by the attraction between positively charge metal ions and the electrons around the ions.
Explanation:
Hope this helps.
Hospital patients are administered oxygen from an pressurized
hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a
cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at a
pressure of 3.0 atm?
Answer:
32000atm
Explanation:
Using Boyle's law equation;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (
V2 = final volume (L)
According to the question below:
P1 = 160.0 atm
P2 = 3.0 atm
V1 = 600L
V2 = ?
Using P1V1 = P2V2
160 × 600 = 3 × V2
96000 = 3V2
V2 = 96000/3
V2 = 32000atm
Which of the following diagram is the correct electron dot diagram for AL
Answer:
the answer is a
Explanation:
If an ecosystem is left alone after a disturbance, it will gradually change from being mostly competitive to being mostly cooperative. True or false?
true
false
plsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss answer with one of the options
Answer:
false
Explanation:
Answer:
True
Explanation:
I did the test, and I answered "false".... It was the wrong answer :(
I think the right anwser is "True" because after a disturbance an ecosystem can recover back its balanced state, so the organisms start to cooperate again.
Earth's surface is shaped and changed in many ways. Which of these can shape Earth's surface?
water
wind
ice
gravity
organisms (living things)
the sun
none of these
all of the above
Drag the tiles to the correct boxes to complete the pairs.
Match each mineral with its main function in the body.
Answer:
Hello calcium maintains healthy bones and muscles. Zinc is for immune function. Iron carrier oxygen to blood. Sodium maintains fluid balance in the body.
Answer: Zinc : plays a role in immune system function
Iron: carries oxygen to all body tissues
Calcium: Maintains healthy bones and muscles
Sodium: maintains fluid balance in the body
Explanation: Got it right on PLATO/edmentum
Why is the C-14/C-12 ratio used to date once-living organisms?
A. C-12 becomes radioactive when an organism dies.
B. The amount of C-12 changes when an organism dies.
C. The half-life of C-14 changes when an organism dies.
D. An organism stops taking in carbon when it dies.
Which set of measurements correctly identifies the speed of an object?
A.
Distance = 18 m
time = 2 hr
speed = 9m/hr
B.
Distance = 30 km
time = 17 min
speed = 1.8 km/hr
C.
Distance = 3 cm
time = 12 min
speed = 36 cm/min
D.
Distance
2 km
time = 24 sec
speed = 48 km/sec
Answer:
A. Distance = 18 m
time = 2 hr
speed = 9 m/hr
Explanation:
Speed is the same thing as velocity.
Velocity = distance/time
18m/2hr = 9m/hr
For choice B, the numbers are right, but the units are mixed (minutes were changed to hours)
Use the periodic table to identify the element indicated by each electron configuration by typing in the
chemical symbol for the element.
Answer:
Explanation:
1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb
We have that an element indicated by its electron configuration, we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
The Periodic table is categorized using the atomic number of elements and symbols are to aid search as well
For an element indicated by its electron configuration we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
For more information on this visit
https://brainly.com/question/22552359?referrer=searchResults
what going on in each spot
nothing ksbsshshhzvsjajbsjshjsgdvdjhsbsj
Answer:
I don't know lol
(reply w the answer or get reported) Ty if you answer this
Answer:
D. 34.5g
Explanation:
Using the following formula to calculate the mass of 1.5moles of sodium (Na);
Mole = mass/molar mass
Molar mass of Na = 23g/mol
mass = mole × molar mass
Mass of Na = 1.5mol × 23g/mol
Mass of Na = 34.5g
Separation of mixtures by removing a layer of liquid
Answer:
Decantation
Explanation:
Please help!!!!!
Due soon really need help
Answer:
a is 16 as the molar ratio is 4:2=2:1
b is 10 as the ratio is 4:2