Answer:
35.8 g
Explanation:
Step 1: Given data
Mass of water: 63.5 g
Step 2: Calculate how many grams of KCl can be dissolved in 63.5. g of water at 80 °C
Solubility is the maximum amount of solute that can be dissolved in 100 g of solute at a specified temperature. The solubility of KCl at 80 °C is 56.3 g%g, that is, we can dissolve up to 56.3 g of KCl in 100 g of water.
63.5 g Water × 56.3 g KCl/100 g Water = 35.8 g KCl
Explain why there would be a need for lithium batteries?
Answer:
The much higher power density offered by lithium ion batteries is a distinct advantage. Electric vehicles also need a battery technology that has a high energy density. ... Lithium ion cells is that their rate of self-discharge is much lower than that of other rechargeable cells such as Ni-Cad and NiMH forms.
Put this into your own words or teachers will make you redo it
Please help due tonight!!! NO LINKS PLEASE they will be flagged.
When 57,816 J of heat are transferred to a 240-g of an unknown metal, its temperature increases from 32⁰C to 164⁰ C. Identify the metal.
If there is a link and you can't answer please put it in the comments I really need help!!!
Answer:
Carbon fiber if I'm correct
What do you think? Is our current understanding ofthe Universe backed up with facts? Is it a good theory
Answer:
Yes
Explanation:
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.
A gas occupies 12.3 L at a temperature of 40.0 K. What is the volume when the temperature is increased to 60.0 K?
Answer:
the volume is 18.45 L
Explanation:
The computation of the volume when the temperature is increased to 60.0 K is shown below:
Since the gas occupied 12.3 L at a temperature of 40.0 k
And, the volume when the new temperature is 60.0 k
So, the volume is
= 60.0 k × 12.3 L ÷ 40.0 k
= 18.45 L
hence, the volume is 18.45 L
Can someone help me with this??
Answer:
A. Oil is to heavy to mix with water
HOPE THIS HELPS
-Todo <3
Explanation:
Answer:
It should be C - Water can only mix with polar molecules.
Explanation:
Oil is non-polar and water is polar.
The volume of a gas at 4.50 atm is 1.90 L, if the pressure of the gas is increased to 6.70 atm, what is the new
volume? In this problem, V2 =
tje new preasure is 10.7l
What is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days?
Answer: A- 1 day
Explanation: I really hope that helped. BYE!!
1 day is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days
Cuales son los símbolos para representar que una reacción se produce en presencia de;
a) electricidad
b) electrolitos
Answer:
b
Explanation:
Which two radioisotopes have the same decay mode?
A)220Fr and 60C0
B)37K and 42K
C)37Ca and 53Fe
D)99Tc and 19Ne
Answer:
c
Explanation:
37Ca and 53Fe have the same decay mode.
What are the three common modes of radioactive decay?Three of the most common types of decay are alpha decay (α-decay), beta decay (β-decay), and gamma decay (γ-decay), all of which involve emitting one or more particles.
Which isotopes are most likely to decay?The most likely mode of decay for a neutron-rich nucleus is one that converts a neutron into a proton. Every neutron-rich radioactive isotope with an atomic number smaller than 83 decays by electron emission. C, 32P, and 35S, for example, are all neutron-rich nuclei that decay by the emission of an electron.
Learn more about radioisotopes here https://brainly.com/question/18640165
#SPJ2
25) In a certain area where there are many farms, the groundwater levels have dropped by as much as 10 m over a period of 30 years. The main cause behind this is MOST LIKELY
A) the evaporation of water from aquifers.
B) the excessive pumping of water through wells.
C) the leakage of fertilizers from the farms into the aquifer.
D) the construction of a dam to divert water into a reservoir.
NO LINKS!!!
I will give Brainliest to 1st right answer!
Answer:
I a, answering so the other dude can get brainily oh and yeah its b
Explanation:
The excessive pumping of water through well is the major reason for the drop of ground water level. The nearby farms over use water and pumps from undergrounds.
What is underground water?Water beneath the earth surface is called ground water. The storage of ground water is a very important in all areas to sustain our need for water and it must be maintained pure without the presence of overdose of heavy metals and other impurities.
Reduction in the level of ground water storage is a serious issue that might leads to a scenario where the drinking water is not sufficient. The uncontrolled use of pump water by factories, industries and farms results in the drop of ground water level.
The nearby farms might pumping water from sources uncontrollably in the area. That is the main reason of dropping in ground water level. Hence, option B is correct.
Find more on groundwater storage:
https://brainly.com/question/29749698
#SPJ2
What happens when water is added to quicklime? Write two observations.
Answer:
1.Most metal oxides are insoluble in water but some of these (e.g. Na2O.
Explanation:
2.: (i) A hissing sound is observed.
1.ii) The mixture starts boiling and lime water is obtained.
Using two ______________ of wire wrapped around an _____________ core produces an ______________ voltage and an _______________ voltage.
Answer:
Using two coils of wire wrapped around an iron core produces an input voltage and output voltage.
Explanation:
For the reaction of C 2H 4( g) with O 2( g), to form CO 2( g) and H 2O( g), what number of grams of CO 2 could be produced from 2.0 g of C 2H 4 and 5.0 g of O 2?
Answer:
4.58g of CO₂ could be produced
Explanation:
Based on the reaction:
C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(g)
1 mole of C₂H₄ reacts with 3 moles of oxygen to produce 2 moles of CO₂
To solve this question we must find the moles of each reactant in order to find limiting reactant. With limiting reactant we can find the moles -And the mass- of CO₂ produced:
Moles C₂H₄ -Molar mass: 28.05g/mol-
2.0g * (1mol / 28.05g) = 0.0713moles
Moles O₂ -Molar mass: 32g/mol-
5.0g * (1mol / 32g) = 0.156moles
For a complete reaction of 0.0713 moles of C2H4 are required:
0.0713 moles C₂H₄ * (3 moles O₂ / 1 mol C₂H₄) = 0.214 moles of O₂
As there are just 0.156 moles, O₂ is limiting reactant.
The moles of CO₂ produced are:
0.156 moles O₂ * (2mol CO₂ / 3mol O₂) = 0.104 moles CO₂
The mass is -Molar mass CO₂: 44.01g/mol-
0.104 moles CO₂ * (44.01g / mol) =
4.58g of CO₂ could be producedWhy can more water vapor (water molecules that are in the gas state of matter) be present in warm air than in cold air?
Answer:
Because warm air is less dense
Explanation:
Which of these molecules is polar?
A.
N2
B.
NaCl
C.
HF
D.
CH4
Answer:
C
Explanation:
.........................
The wording of these questions are confusing how would you set this up ?
The formula is m1v1=m2v2
Answer:
8. 171074.8 mL
9. 3475 mL.
Explanation:
8. Determination of the volume of the diluted solution.
Initial Molarity (M₁) = 14 M
Initial volume (V₁) = 523 mL
Final Molarity (M₂) = 0.0428 M
Final volume (V₂) =?
Using the dilution formula, we can obtain the volume of the diluted solution as follow:
M₁V₁ = M₂V₂
14 × 523 = 0.0428 × V₂
7322 = 0.0428 × V₂
Divide both side by 0.0428
V₂ = 7322 / 0.0428
V₂ = 171074.8 mL
Therefore, the volume of the diluted solution is 171074.8 mL
9. Determination of the volume of water added.
We'll begin by calculating the final volume of the solution. This can be obtained as follow:
Initial Molarity (M₁) = 3.2 M
Initial volume (V₁) = 973 mL
Final Molarity (M₂) = 0.7 M
Final volume (V₂) =?
M₁V₁ = M₂V₂
3.2 × 973 = 0.7 × V₂
3113.6 = 0.7 × V₂
Divide both side by 0.7
V₂ = 3113.6 / 0.7
V₂ = 4448 mL
Thus, the final volume of the solution is 4448 mL
Finally, we shall determine the volume of water added. This can be obtained as follow:
Initial volume (V₁) = 973 mL
Final volume (V₂) = 4448 mL
Volume of water added =?
Volume of water added = V₂ – V₁
Volume of water added = 4448 – 973
Volume of water added = 3475 mL
ЗKOH + H3PO4=K3PO4 + 3H2O
what is the reaction
Answer: The given reaction is a neutralization reaction.
Explanation:
When an acid chemically reacts with a base then it leads to the formation of salt and water.
For example, [tex]3KOH + H_{3}PO_{4} \rightarrow K_{3}PO_{4} + 3H_{2}O[/tex]
Here, KOH is a the base and [tex]H_{3}PO_{4}[/tex] is an acid which on chemical reaction with each other leads to the formation of salt [tex](K_{3}PO_{4})[/tex] and water [tex](H_{2}O)[/tex].
Thus, we can conclude that the given reaction is a neutralization reaction.
17) What is the molarity
of a solution with
55 grams of CaCl2
dissolved in .78 L
of water?
a. 64M
b. 1.3 M
c. 171 M
d. 91 M
The molarity of a solution with 55 grams of CaCl2 dissolved in 0.78 L is 0.64M. Details about molarity is found below.
How to calculate molarity?The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume.
However, the number of moles of a substance must first be calculated using the following expression:
no of moles = 55g ÷ 111g/mol
no of moles = 0.49mol
Molarity of CaCl2 solution = 0.49mol ÷ 0.78L
Molarity of CaCl2 solution = 0.64M
Therefore, the molarity of a solution with 55 grams of CaCl2 dissolved in 0.78 L is 0.64M.
Learn more about molarity at: https://brainly.com/question/2817451
What is the overall equation for the covalent bond in H2O . Is it H2 + O2=H2O OR. H2 + O = H2O
Answer:
The answer is in the photo
Explanation:
I hope that is useful for you :)
2. C + S → CS2
Reaction Type:
how much heat is required to increase the temperature of 20 grams of water by 26 degrees celsius?
Answer: 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.
Explanation:
Given: Mass = 20 g
Change in temperature = [tex]26^{o}C[/tex]
The standard value of specific heat of water is [tex]4.184 J/ g^{o}C[/tex]
Formula used to calculate the heat energy is as follows.
[tex]q = m \times C \times \Delta T[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat of substance
[tex]\Delta T[/tex] = change in temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times \Delta T\\= 20 g \times 4.184 J/g ^{o}C \times 26^{o}C\\= 2175.68 J[/tex]
Thus, we can conclude that 2175.68 J heat is required to increase the temperature of 20 grams of water by 26 degrees celsius.
You mix two amino acids together: glu and ser. If they reacted, how many different dipeptides would you expect to get? List them.
I'm really struggling with amino acids, so any help is appreciated! I won't be clicking any links, though.
Answer:
Answers 1. An amide linkage between the carboxyl group of one amino acid and the amine group of the other amino acid. 2. An ester is a compound formed from the reaction of a carboxylic acid and an alcohol. ( I apologise, I cant figure out number 3.. )
How does the CO2 level affect photosynthesis?
Answer:
Elevated [CO2] increases the availability of carbon in leaves causing greater Rubisco activity and higher rates of photosynthesis. Greater photosynthesis increases the content of non-structural carbohydrates in leaves which can lead to greater starch reserves and increased auxin biosynthesis.
Explanation:
Hope it helps
FOLLOW MY ACCOUNT PLS PLS
A graph of gas pressure versus the number of particles in a container is a straight line. Which other relationship will have a similar graph? volume versus pressure, because they are also directly proportional volume versus temperature, because they are also directly proportional volume versus pressure, because they are also inversely proportional volume versus temperature, because they are also inversely proportional
Answer:
b
Explanation:
gitcy is good for your spleen
The other relationship that will have a similar graph is volume versus temperature, because they are also directly proportional according to Charles's Law.
What is Charles's Law?Charles's Law is a gas law that states that the volume of a fixed mass of gas at a constant pressure is directly proportional to its absolute temperature.
This means that as the temperature of a gas increases, the volume of the gas will also increase proportionally, and as the temperature of a gas decreases, the volume of the gas will decrease proportionally.
Therefore, if a graph of gas pressure versus the number of particles in a container is a straight line, a graph of volume versus temperature will have a similar shape and be directly proportional, because they are both affected by changes in temperature.
Learn more about Charles's Law at:
https://brainly.com/question/16927784
#SPJ7
What are some facts about Radon???
Answer:
It was the fifth radioactive element discovered, and is typically a colorless gas that puts off an insane glow when frozen.
Please answer quick!!
Which statement best explains how sexual reproduction increases variation within a species?
A. It causes the genes of two different individuals to mix.
B. It changes the base sequence of an organism's DNA.
C. It changes the trait that a given gene produces.
D. It copies one parent's genes to make each offspring.
Answer:
A
Explanation:
it causes the genes of two different individuals to mix
Answer:
Explanation:
A. It causes the genes of two different individuals to mix.
A sample of air starts at STP. The volume and moles remains the same, what happens to the pressure if the temperature changes to 317 K?
show steps
Answer:
Pressure increases to 1.16 atm if the temperature changes to 317 K.
Explanation:
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C (or 273 K) are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
On the other hand, Gay Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. This law mathematically indicates that the quotient between pressure and temperature is constant:
[tex]\frac{P}{T}=k[/tex]
Studying an initial state 1 and a final state 2 is fulfilled:
[tex]\frac{P1}{T1}=\frac{P2}{T2}[/tex]
In this case:
P1= 1 atmT1= 0 C= 273 KP2= ?T2= 317 KReplacing:
[tex]\frac{1 atm}{273 K} =\frac{P2}{317 K}[/tex]
Solving:
[tex]P2=317 K*\frac{1 atm}{273 K}[/tex]
P2= 1.16 atm
Pressure increases to 1.16 atm if the temperature changes to 317 K.
What is an example of a microorganism acting in a harmful way?
Answer:
bacteria spoiling food
hope this helps
have a good day :)
Explanation:
when you rub your sock on carpet then touch a door what happens? what are the charges doing?
A natural levee is _____.
A. an erosional feature that causes additional sediment to enter the river
B. a depositional elongated ridge formed by moving water that runs parallel to a stream channel
C. an elongated ridge designed by engineers that runs parallel to a stream channel
D. the result of wind erosion
Answer:
Option C, an elongated ridge designed by engineers that runs parallel to a stream channel
Explanation:
A natural or artificial levee is basically a ridge constructed along a river bank to regulate the water level in the stream.
It run along the river embankment and hence can be said that it runs parallel to the river length
Hence, option C is correct