Answer:
Potassium
Explanation:
In group one of the periodic table both the melting and the boiling points usually decrease down the group.
Now, down the group, it's lithium that comes first, then sodium, then potassium.
Thus, among the 3, potassium is furthermost down the group by virtue of the factor it has the highest atomic number.
Therefore, we can say that potassium has the lowest boiling point among the 3.
Balance the following chemical equation:
Mg(OH)₂ + HCI → MgCI₂ + H₂ O
Answer:
Mg(OH)₂ + 2HCI → MgCI₂ + 2 H₂ O
Explanation:
How does the radius of the central atom affect the boiling points of Group 16 halides?
can someone help ill give 30 extra points if its right
Answer:
sweating
Explanation:
why do I need 20 words
Mikala pours a tablespoon of salt into a beaker of water. Diffusion will cause the salt molecules to dissolve in the molecules of water. How could Mikala increase the diffusion rate of the salt molecules?
A. Mikala could remove all sources of light from the beaker.
B. Mikala could slowly pour more water into the beaker.
C. Mikala could decrease the temperature of the solution.
D. Mikala could increase the temperature of the solution.
What is the symbol for entropy? S ΔH H ΔS
Answer:
S
Explanation:
The symbol for entropy is S, and a change in entropy is shown as “delta” S or ΔS. If the entropy of a system increases, ΔS is positive. If the entropy of a system decreases, ΔS is negative.
4. Juan tiene un cilindro de 40 libras herméticamente cerrado con gas propano y lo conecta mediante una válvula a otro cilindro de 100 libras completamente vacío. Si Juan abre la válvula del cilindro de 40 dejando pasar el gas al de 100. responda
¿Qué cantidad de gas propano le haría falta al cilindro de 100 y por qué?
Answer:
Ver explicacion
Explanation:
Cuando el cilindro de 40 libras está conectado al cilindro de 100 libras, generamos una presión que continúa hasta que los dos cilindros alcanzan la misma presión de gas en equilibrio. Recuerde que el cilindro de 100 libras estaba inicialmente vacío. Esto significa que su presión inicial es 0. El cilindro de 40 libras ya estaba lleno, por lo que dividimos esta cantidad en dos para tener en cuenta su distribución entre los dos cilindros.
Ahora tenemos 20 libras de gas propano presentes en cada cilindro. La implicación de esto es que, en el cilindro de 100 libras, necesitamos 80 libras adicionales para completar las 100 libras.
what is the molarity of a solution that contains 10.0 grams of silver nitrate that has been dissolved in 750 mL of water?
Answer:
C = (m / M) / (V / 1000) = (10 / 170) / (750 / 1000) = 0.078 M
Explanation:
Which of the following is a characteristic of a scientific theory
1. It explains how nature works.
2. It is based on a single experiment.
3. It should not be possible to replicate its results.
4. It should not be possible to replicate its observations.
NEED URGENT!!!!!
Answer:
number one
Explanation:
hope I helped
What is a catalyst and why is it used in chemical reactions?
Answer:
A catalyst is a substance that can be added to a reaction to speed up the process without being absorbed by it. Catalysts usually work by lowering the activation energy or modifying the mechanism of a reaction. Proteins that act as catalysts in biochemical reactions are known as enzymes.
Explanation:
Molarity and Dilution
How many moles are needed in a 100. mL solution of a 0.10M CuSO4 5H2O solution?
Answer: The moles needed are 0.01.
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute [tex](CuSO_4.5H_2O)[/tex] = ?
[tex]V_s[/tex] = volume of solution in ml
Now put all the given values in the formula of molarity, we get
[tex]0.10=\frac{n\times 1000}{100}[/tex]
[tex]n=\frac{0.10\times 100}{1000}=0.01[/tex]
Therefore, the moles needed are 0.01.
An organic compound (A) reacts with HCN to give (B). On hydrolysis of (B) in acidic medium gives (C). Compound (A) also produces propane when treated with zinc-amalgam and HCl. Identify (A), (B) and (C) with reaction and give their IUPAC names.What product would you expect when A is treated with trichloromethane in alkaline medium.
Answer:
Hydrolic Acid
Explanation:
The compound A is propanone which gives 2 -hydroxy- 2 methyl propane nitrile. This upon hydrolysis in acidic medium gives 2 hydroxy butanoic acid. Propanone when treated with trichloromethane gives the compound chloretone.
What is propanone?Propanone is an organic compound in the classification of ketones. Ketones are compounds with the general formula of R- CO- R. The skeleton of propanone is CH₃ - CO - CH₃.
The reaction of ketones with Zn - amalgam in HCl gives corresponding alkanes . Hence, compound A is propanone. Propanone on reaction with HCN gives 2 -hydroxy- 2 methyl propanenitrile this is B.
B on hydrolysis converts the CN groups to the acidic group COOH. Hence, 2 -hydroxy- 2 methyl propanenitrile converts to 2 -hydroxy- butanoic acid, that is C. Propanone on reaction with trichloromethane CHCl₃ gives chloretone.
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define acidic salt with example
Answer:
[tex] \color{magenta} \huge{ \boxed{answer}}[/tex]
Acidic SaltAcid salts are a class of salts that produce an acidic solution after being dissolved in a solvent. Its formation as a substance has a greater electrical conductivity than that of the pure solvent. An acidic solution formed by acid salt is made during partial neutralization of diprotic or polyprotic acids.
hopefully help:)
Explanation:
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#CarryOnLearningwhat does mass change to and what does it do
Answer:
Mass is the amount of matter in an object and does not change with location.
Explanation:
View
::
If the distance represented by the letter
A (the amplitude) were increased, how
would it change the sound?
Answer:
The amplitude of the sound wave in no way affects the speed of the sound as it affects the loudness of the sound produced. Loudness depends on the square of the amplitude of the wave. Amplitude is the size of the vibration, and this determines how loud the sound is. Larger vibrations make a louder sound.
Explanation:
If the amplitude (A) of the wave is increased then the sound would be louder.
What are sound waves?Sound waves transmit through solids, liquids, gases, and plasma in the form of longitudinal waves, also known as compression waves. Sound needs a medium to travel so it can be traveled through solids as both longitudinal waves as well as transverse waves.
Longitudinal sound contains alternating pressure deviations with the formation of compression and rarefaction in the waves, while transverse waves exhibit waves of alternating shear stress right-angled to the propagation direction.
Amplitude can be described as the relative strength of sound waves, which we perceive as volume or loudness. The amplitude of the wave describes the power of the wave represented by the height of the sound wave.
Therefore, if the distance represented by the letter A (amplitude) was increased, the loudness of the sound will increase.
Learn more about sound waves, here:
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Jimmy is walking down the street and he notices that there is a small tree that has been uprooted from the ground. What two spheres are interacting in this scenario? *
Answer:
Explanation:,.....
Explanation is in the file
tinyurl.com/wpazsebu
It’s cold outside and you decide to cook some pasta. As you boil the noodles, the kitchen window begins to fog up. Which processes are at work here?
boiling and freezing
vaporization and condensation
evaporation and thawing
condensation and evaporation
Answer:
condensation and evaporation
Explanation:
condensation forms when warm humid air contacts cold surface. during cold months.
Number 10 plz I will brainly
Answer:
3 m/s²
Explanation:
First, find the change in velocity.
13 - 1 = 12
Divide the change in velocity by the time it took to cross this distance.
12/4 = 3
3 m/s² is the average acceleration of the lizard.
GIVING BRAINLIEST AND THE REST OF MY POINTS!!!!! :D
A scientist made the following table showing the number of eggs laid by two different salmon. Based on this data, which fish has the best chance of their offspring surviving, and what type of adaptation is this?
A) Salmon #1, life cycle adaptation
B) Salmon #1, physical adaptation
C) Salmon #2, life cycle adaptation
D) Salmon #2, behavioral adaptation
Answer:
C
Explanation:I got it correct on a quiz I did that had this question
why cant acid anhydrides(oxides) react with acids?
Answer:
Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.
Explanation:
A 17.5 ml sample of an acetic acid (ch3co2h) solution required 29.6 ml of 0.250 m naoh for neutralization. the concentration of acetic acid was __________ m.
Answer:
0.423M
Explanation:
The reaction of acetic acid with NaOH is:
CH₃CO₂H + NaOH → CH₃CO₂Na + H₂O
That means the moles of NaOH added = Moles acetic acid in the solution
To solve this problem we need to find the moles of NaOH added to find the moles of acetic acid and its concentration using its volume as follows:
Moles NaOH:
29.6mL = 0.0296L * (0.250mol / L)= 0.0074 moles NaOH = Moles acetic acid
Molarity acetic acid:
0.0074 moles / 0.0175L =
0.423MWhich term describes the members of the same species in an area. A.habitat. B.populatuon. C.indivdual. D.community
Answer:
B. population
hope this helps!
Answer:
community
Explanation:
The group of people living in the same place or having a particular characteristic in common.
A social group of any size whose members reside in a specific locality, share government...
SHOW ALL WORK AND INCLUDE UNITS
How much heat is required to raise the temperature of 10.0 g of iron from 25°C to 100.°C? The specific heat capacity of iron is 0.46 J/g°C.
Answer:
345J
Explanation:
-mass of iron (m) = 10.0 g
-temperature (ΔT) = final temperature- initial temperature= 100-25= 75 degree Celsius
-Specific Heat capacity of iron (c)= 0.46J/g°C.
Heat (Q)=?
Solution:
Formula for Heat is :
Q=m x c x ΔT
Q= 10 x 0.46 x 75
Q= 345 J.
so, 345 joules of heat are needed to increase the temperature of 10 grams of iron.
From the above formula, all other questions can easily be solved from the same procedure.
345 joules of heat is required to raise the temperature of 10.0 g of iron from 25°C to 100°C.
How we calculate the required heat in any reaction?Required heat of any reaction can be calculated as:
Q = m x c x ΔT, where
In the question given that:
m = mass of iron = 10g
c = specific heat capacity of iron = 0.46J/g°C
ΔT = change in temperature = final temperature- initial temperature= 100-25= 75 degree Celsius
Now putting all these values in the above equation, we get
Q= 10g x 0.46J/g°C x 75°C = 345J
Hence, 345 joules of heat is required.
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what is the wave speed if the wave length is 8 and the frequency is 20
Answer:
160m/s
Explanation:
To find V Use the following formula V= F*W
V= Velocity F= Frequency W= Wavelength
V=20*8
=160m/s
PLZ HELP 20 PIONTSS!!!
i need a paragraph basically explaining what the carbon cycle is
Answer:
The carbon cycle explains how carbon travels from one reservoir to another on the earth. This cycle is vital for the Earth's atmosphere and carbon balance to remain stable.
Explanation:
Answer:
The carbon cycle describes the process where carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Since Earth's atmosphere forms a closed environment, the amount of carbon in this system doesn't change.
Explanation:
change the text a tiny bit
yes this is off g00gle but i changed some words
What element should I do a project on?
Answer:
Project scope statement?
Explanation:
it's good one just do research on it
This squirrel lives in a forest and eats only acorns. What will MOST LIKELY happen to the squirrel if the oak trees in this forest start dying of a disease?
A) The squirrel will adapt to less food.
B) The squirrel will not be affected at all
C) The squirrel will starve if it can't find enough food.
D) The squirrel will eat berries instead of acorns to survive.
Answer:
it's c
Explanation:
An 85.00 g sample of an unknown compound contains 24.26 g molybdenum, 24.33 g sulfur, and the rest is oxygen. How many moles of molybdenum are present in the compound
Answer:
A) 0.253 mol B) 0.7603 mol C) 2.276 mol D) MoS₃O₉ or Mo(SO₃)₃ E) molybdenum(VI) sulfite
Explanation:
For all the Mole problems you want to find divide grams of the element in compound by the molar mass of the element.
24.26 g Mo / 95.95 g = 0.2528
24.33 g S / 32.06 g = 0.7589 mol S
36.41 g O / 16 g = 2.276 mol O
S / Mo = 0.7587 mol / 0.2529 mol = 3/ 1
O / Mo = 2.276 mol / 0.2529 mol = 9/ 1
The empirical formula of the compound is MoS₃O₉ or Mo(SO₃)₃.
The number of mole of molybdenum present in the compound is 0.253 mole
From the question given above, the following data were obtained:
Mass of compound = 85 g
molybdenum = 24.26 g
Sulphur = 24.33 g
The number of mole of molybdenum in the compound can be obtained as follow:
Mass of molybdenum = 24.26 g
Molar mass of molybdenum = 95.95 g/mol
Mole of molybdenum =?Mole = mass / molar mass
Mole = 24.26 / 95.95
Mole of molybdenum = 0.253 moleTherefore, the number of mole of molybdenum present in the compound is 0.253 mole
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Calculate the pH after 0.10 mol of NaOH is added to 1.0 L of a solution that is 0.40 M CH3NH2 and 0.80 M CH3NH3Cl. WebAssign will check your answer for the correct number of significant figures. Calculate the pH after 0.10 mol of HCl is added to 1.0 L of a solution that is 0.40 M CH3NH2 and 0.80 M CH3NH3Cl. WebAssign will check your answer for the correct number of significant figures.
Answer:
E
Explanation:
someone help ,, I'll give brainliest lolll .
Answer:
toxic substances to humans
Explanation:
Answer:
Toxic substance to humans
Explanation:
Lead is a naturally occurring element found in small amounts in the earth’s crust. While it has some beneficial uses, it can be toxic to humans and animals, causing health effects.
Acidified water is electrolysed by using carbon electrodes. What is produced
at Negative carbon electrode
Answer:
Hydrogen gas
Explanation:
During electrolysis of acidified water, H+ ions are reduced to H2 gas at the negative carbon electrode (cathode) and hence hydrogen gas is liberated at cathode.