Answer: a) current
Explanation:
Match the following vocabulary words with the correct definitions.
1. a liquid changing to a gas
condensation
2. evaporation from plants
transpiration
3. a gas changing to a liquid
precipitation
4. moisture falling to the Earth
evaporation
need help
A brick has a mass of and the Earth has a mass of . Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.
The given question is incomplete. The complete question is:
A brick has a mass of 4.0 kg and the earth has a mass of [tex]6.0\times 10^{27}g[/tex] Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.
Answer: The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]
2.5 moles of bricks have a mass equal to the mass of the Earth
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Mass of 1 brick = 4.0 kg = 4000 g (1kg=1000g)
Thus mass of 1 mole of brick or [tex]6.023\times 10^{23}[/tex] bricks will be = [tex]\frac{4000g}{1}\times 6.023\times 10^{23}=2.4\times 10^{27}g[/tex]
The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]
Now [tex]2.4\times 10^{27}g[/tex] will correspond to = 1 mole of bricks
[tex]6.0\times 10^{27}g[/tex] will correspond to =[tex]\frac{1}{2.4\times 10^{27}}\times 6.0\times 10^{27}=2.5moles[/tex]
2.5 moles of bricks have a mass equal to the mass of the Earth
Help please thank you
Answer:
B I think I am pretty sure
5. Based on Reference Table F, which of the following saturated solutions would be the least concentrated?
1) copper (II) sulfate 2) barium sulfate
3) sodium sulfate 4) potassium sulfate
Answer:
barium sulfate
Explanation:
the reaction that takes place in chemical cell is best classified as. A.fusion B.redox C.transmutation D.redox
The reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.
The reaction cell or the voltaic cell has been the one that has been able to convert electrical energy into chemical energy. In the chemical cell, electrical energy has been provided to the cell for bringing the chemical change.
The chemical change has been brought by the oxidation and reduction of the elements with the application of electric current. The reaction that has been based on the oxidation and reduction of the elements has been termed the redox reaction.
Thus, the reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.
For more information about the chemical cell, refer to the link:
https://brainly.com/question/995105
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
__Ca + __H20 --> __Ca(OH)2 + __H2
2 Ca + 2H2O ⇒ 2 Ca(OH)2 + H2
Explanation: number of atoms of every element
Need to be equal in both sides
The right ratio of chemicals for the balanced chemical equation is 2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.
What is balanced chemical equation ?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.
A chemical equation must be balanced. This is so that it can convey how many moles are reacting and creating. The amount of electrons that are transferred from one substance to another is also indicated. An equation that balances or is balanced also describes how energy is changed.
Thus, the balanced chemical equation is 2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.
To learn more about balanced chemical equation, follow the link;
https://brainly.com/question/28294176
#SPJ2
Why does CH4 have a higher vapor pressure at a given temperature than CH3Cl? Why does CH3OH have a higher vapor pressure at a given temperature than CH3CH2CH2OH? Why does H2CO have a higher vapor pressure at a given temperature than CH3OH?
Explanation:
CH4, methane is a non polar compound whereas CH3Cl is a polar compound because of presence of electronegative element chlorine. Hence, there is a net dipole moment in case of CH3Cl( Chloromethane). This causes CH3Cl to exhibits dipole-dipole intermolecular force of attraction, which is absent in CH4. Therefore, Chloromethane has a lower vapor pressure when compared to methane.
Calculate the molarity of a solution of monoprotic KHP prepared by mixing a 0.5237 g KHP in 50.0 mL of water .
Answer:
[tex]M=0.0513M[/tex]
Explanation:
Hello!
In this case, since the molarity of a solution is computed by dividing the moles of solute by the volume of solution, we notice we first need the moles of KHP as shown below:
[tex]n=0.5237g*\frac{1mol}{204.22 g} =0.00256mol[/tex]
Next, the volume in liters:
[tex]V=50.0mL*\frac{1L}{1000mL}\\\\V=0.0500L[/tex]
Thus, the molarity turns out to be:
[tex]M=\frac{n}{V}\\\\M=\frac{0.00256mol}{0.05000L} \\\\M=0.0513M[/tex]
Best regards!
If the amount of dissolved solute in a solution at a given temperature is greater than the amount that can permanently remain in the solution at that temperature, the solution is said to be
a. diluted.
b. unsaturated.
c. saturated.
d. supersaturated.
that temperature is saturated.
A weather balloon is released in Houston when the pressure is 758.0 mmHg and 32.7°C. After the balloon reaches an altitude of 6000 m it measures a volume of 425 L with a pressure of 364.2 mmHg and a temperature is 3.10°C. What was the initial volume of the balloon? Show all your work and round your answer to the hundredths place.
A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. The total pressure of the mixture is 100.0 kPa. If the partial pressure for helium is 83.1 kPa and 0.1000 kPa for carbon dioxide, what is the partial pressure of oxygen? Show all your work and round your answer to the tenths place.
Answer:
See explanation
Explanation:
From the information provided;
P1 = initial pressure = 758.0 mmHg
T1 = Initial temperature = 32.7°C + 273 = 305.7 K
V1 = Initial volume?
P2 = Final pressure = 364.2 mmHg
V2 = Final volume = 425 L
T2= Final Temperature = 3.10°C + 273 = 276.1 K
P1V1/T1 = P2V2/T2
P1V1T2 =P2V2T1
V1 = P2V2T1/P1T2
V1 = 364.2 * 425 * 305.7/758.0 * 276.1
V1 = 226. 18 L
B) Total pressure = 100.0 kPa
Pressure of Helium = 83.1 kPa
Pressure of carbon dioxide = 0.1000 kPa
Pressure of oxygen ?
From Dalton's law of partial pressures;
PT = P1 + P2 +P3 +.........
Hence;
Poxygen = 100.0 kPa - (83.1 kPa + 0.1000 kPa)
Poxygen = 16.8 kPa
What must ALWAYS be used to convert between quantities of two different chemical substances?
Answer:
Balanced equations and mole ratios
In general, mole ratios can be used to convert between amounts of any two substances involved in a chemical reaction.
Explanation:
yw
Answer:
ask your mom and your family
Explanation:
tell your mom that she sucks
Name the acid: HC2H302
Answer:
acetic acid
Explanation:
acetic acid has a formula of HC2H3O2
unless there are 303 hydrogens
brainliest plz
The acid with the formula HC2H302 is known as acetic acid which is a weak organic acid with the chemical formula CH3COOH.
What is the name of the acid HC2H302?HC2H302 is known as acetic acid which is a weak organic acid with the chemical formula CH3COOH. It is a colorless liquid with a pungent smell and is commonly found in vinegar. They are used in various applications including food preservatives, cleaning agents and chemical synthesis.
As a clear and colorless liquid with a distinctive sour taste and pungent smell, these acetic acid are commonly found in vinegar and is used in various industrial processes including the production of plastics, solvents and dyes.
Read more about acid
brainly.com/question/25148363
#SPJ6
Plants get all their matter from soil. True or False
Answer:
False
Explanation:
Not all of it but some of it. Hope this helps! (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
you are on vacation with your family up in the mountains. your friend is on vacation near the equator by the ocean.Explain which climate will experience the most precipitation.
A.both climates will have the same amount of precipitation. B.the ocean climate will have less precipitation.C. the mountain climate will have more precipitation. D.the climate around the equator will have more precipitation(this question is for science)
Answer:
option d is right
Explanation:
More precipitation occurs near the equator because it is a tropical area. Mountains receive less than 15 inches of rain per year while the equator area receives a lot of rain. This is due to the very hot weather.
The climate around the equator will have more precipitation because it is very hot.
thats the answer
Which of the following statements is correct?
Answer: A
Explanation: i took the test
4. A compound has both ionic and covalent bonds if it contains what?chemistry
Hope this helps! I hope you have a great rest of your day! Also, if you would, please make me brainliest! <3
= Br
= C
Name is
1
, formula is
Answer:
yqujsbr
Explanation:
hejsudh2ihdg4 they t sjh5c4uSvreju5 aur bd84kskythddok6vr for
Can someone pls tell me if this is right?
Answer:
wrong it is hydrogen is more electronegative
you are welcome
HURRY! Only 5 minutes to answer!
What causes droughts?
1. Humans
2. Natural Events
3. Aliens from outer space
4. Like with many things about our planet it is caused by Humans and Nature
Answer:
The is 4. Like with many things about our planet it is caused by Humans and Nature, I belive because droughts can be caused by humans and nature.
Explanation: Humans cut trees down trees , which trigger droughts to happen. Also because when humans cut a widespread of trees down just for fuel, it can potentially reduce the soil's ability to hold water ... triggering droughts to happen. But also droughts can happen just by nature.
Calculate the volume of 5.0 grams of NO gas at STP.
Answer:
The volume of 5.0 g CO 2 is 2.6 L CO 2 at STP
Explanation:
STP
STP is currently
0
∘
C
or
273.15 K
, which are equal, though the Kelvin temperature scale is used for gas laws; and pressure is
10
5
.
Pascals (Pa)
, but most people use
100 kPa
, which is equal to
10
5
.
Pa
.
You will use the ideal gas law to answer this question. Its formula is:
P
V
=
n
R
T
,
where
P
is pressure,
V
is volume,
n
is moles,
R
is a gas constant, and
T
is temperature in Kelvins.
Determine moles
You may have noticed that the equation requires moles
(
n
)
, but you have been given the mass of
CO
2
. To determine moles, you multiply the given mass by the inverse of the molar mass of
CO
2
, which is
44.009 g/mol
.
5.0
g CO
2
×
1
mol CO
2
44.009
g CO
2
=
0.1136 mol CO
2
Organize your data
.
Given/Known
P
=
100 kPa
n
=
0.1136 mol
R
=
8.3145 L kPa K
−
1
mol
−
1
https://en.wikipedia.org/wiki/Gas_constant
T
=
273.15 K
Unknown:
V
Solve for volume using the ideal gas law.
Rearrange the formula to isolate
V
. Insert your data into the equation and solve.
V
=
n
R
T
P
V
=
0.1136
mol
×
8.3145
.
L
kPa
K
−
1
mol
−
1
×
273.15
K
100
kPa
=
2.6 L CO
2
rounded to two significant figures due to
5.0 g
Answer link
Doc048
May 18, 2017
I got 2.55 Liters
Explanation:
1 mole of any gas at STP = 22.4 Liters
5
g
C
O
2
(
g
)
=
5
g
44
(
g
mole
)
=
0.114
mole
C
O
2
(
g
)
Volume of 0.114 mole
C
O
2
(
g
)
= (0.114 mole)(22.4 L/mole) = 2.55 Liters
C
O
2
(g) at STP
WILL GIVE BRAINLIEST PLS HELP!!
How are air pressure and wind related?
Stronger winds will blow between two regions if they have the same air pressure.
A greater difference in air pressure between two regions will cause stronger winds to blow.
A smaller difference in air pressure between two regions will cause stronger winds to blow.
Winds will always blow from a region of low pressure to a region of high pressure.
Answer:
air presure pushes things and the wind is a gust of air
Explanation:
What do producers, consumers, and decomposers all have in common?
A. They only exist on land.
B. They are all the same type of organism.
C. They only live in ecosystems with warm temperatures.
D. They rely on abiotic components of ecosystems to live.
what can determine from examining the fossil record
Answer:
Fossils are traces of organisms that lived in the past. When fossils are found, they are analyzed to determine the age of the fossil. The absolute age of the fossil can be determined through radiometric dating and determining the layer of rock in which the fossil was found.
Explanation:
You add 0.500 moles of an alcohol to 500 gram of water. The molality of your solution is?
Which of the following compounds would most likely be the reactants in a combustion reaction?
sulfuric acid and water
oxygen and hydrocarbon
oxygen and carbon dioxide
carbon dioxide and hydrocarbon
Answer:
reaction between oxygen and hydrocarbon is combustion
The compound would most likely be the reactants in a combustion reaction is oxygen and hydrocarbon.
What is combustion reaction?Those reaction in which a fuel will change into a water molecule and carbon dioxide gas, in the presence of oxygen is known as combustion reaction.
Combustion reaction will represent as:
CₓHₙ + O₂ → H₂O + CO₂, where
CₓHₙ is a hydrocarbon which gets oxidized in the presence of oxygen oxidant.
Hence option (2) is correct i.e. oxygen and hydrocarbon.
To know more about combustion reaction, visit the below link:
https://brainly.com/question/9425444
Higher temperatures tend to increase the rate of a chemical reaction because
a. the particles have greater momentum and therefore have higher energy collisions.
b. the particles are more likely to behave as a catalyst and lower the activation energy.
c. the particles move faster and therefore collide more often.
d. the particles have greater attractions and therefore collide with the correct orientation.
Answer:
b
Explanation:
Higher temperatures tend to increase the rate of a chemical reaction because the particles move faster and therefore collide more often.
What is rate of reaction?Rate of reaction tells about the speed of the reaction or at what duration of time a reaction gets completed.
When we increases the temperature of any chemical reaction, then the kinetic energy of the molecules increases, due to which they move fast in the chemical reaction. Due to this random and fast movement molecules get collide with each other rapidly and easily form the product.
Hence option (c) is correct i.e. particles move faster and therefore collide more often when temperature increases.
To learn more about rate of reaction, visit the below link:
https://brainly.com/question/19513092
Solutions with water as the solvent are called
a.liquids.
b.electrolytic.
c.aqueous solutions.
d.miscible solutions.
Answer:
C. Aqueous Solutions
General Formulas and Concepts:
Aqueous Solutions'
DissociationSolvents and SolutionsExplanation:
Water is the universal solution that solvents are dissolved in. Whenever anything is dissolved in water, it will be an aqueous solution.
Strong ionic solutions dissolve into their ions when dissolved in water.
Weak acids and bases don't fully dissociate in water.
How many total atoms are in this chemical formula?
6H3PO4
Explanation:
total atoms = 18 + 6 + 24= 48 atoms
Whats the atomic number for protactinium-231
Answer:
91
Fact box
Group Actinides 1572°C, 2862°F, 1845 K
Block f 15.4
Atomic number 91 231.036
State at 20°C Solid 231Pa
Electron configuration [Rn] 5f26d17s2 7440-13-3
Explanation:
What is the speed of an electromagnetic wave that has a wavelength of 8.6 x 10-5 m?
Answer:
The speed of the given electromagnetic wave is 3 x 10⁸ m/s.
Explanation:
Electromagnetic wave is a type of energy that is commonly known as light energy. The speed of light in air is about 3 x 10⁸ meters per second (m/s).
All electromagnetic waves travel at the same speed which is equal to speed of light, approximately 3 x 10⁸ meters per second (m/s) through a vacuum or air.
Therefore, the speed of the given electromagnetic wave is 3 x 10⁸ m/s.