Answer:
1
Explanation:
Formula of molarity is
[tex]M=\frac{n}{v}[/tex]
M= molarity
n= no of moles
v= volume in liters (if mL then you have to convert it to L)
What is the lanthanide with least mass, periodic table?
Answer:
Europium/Eu ( not really sure )
The lanthanide element with the least mass is Lutetium (Lu)
Lutetium (Lu) is a member of the lanthanide series, which is a group of 15 elements located in the f-block of the periodic table. The lanthanide series starts with the element Lanthanum (La) and ends with Lutetium (Lu). Lutetium is the heaviest and most dense element in the lanthanide series. Lutetium has an atomic number of 71, indicating that it has 71 protons in its nucleus. It has a relatively high atomic mass of approximately 174.97 atomic mass units (u) according to the periodic table.
Hence, lutetium is the lanthanide element with the least mass.
Learn more about lanthanide elements here:
https://brainly.com/question/28305751
#SPJ 6
Which indicates how evidence of climate change supports the theory of continental drift?
1. coal fields in several continents
2. volcano formation
3. glacial evidence
4. folded mountains in Africa and South America
Answer:
glacial evidence found in South America
Answer: C. Glacial evidence
HELP PLEASE Which type of power generation can produce carbon dioxide? solar hydroelectric coal wind
Answer:
COAL
Explanation:
Answer:
Coal!
Explanation:
Hope this helps!
marking brainliest please help
how should baking pizza be categorized
Answer: The baking of a pizza should be categorized as an endothermic process because the dough absorbs heat. An endothermic process is a method that absorbs energy from its surroundings which is habitually in the form of energy
Explanation:
Answer:
endothermic; the dough absorbs heat
Explanation:
EDG2020
In what way is heat transferred to the tubes? (Hint “touching’”)
Please help
I will give you Brainliest
Answer:
in heat transfer, as the fluid flows along the tube, the wall layers are heated or cooled. temp. variation occurs in the wall layers.
good luck :)
i hope this helps
have a great day !!
Gas in a balloon occupies 3.3 liters. What volume will it occupy if the pressure is changed from 100 kPa to 90.0 kPa, if the temperature is held constant?
Answer:
3.7 L
Explanation:
Initial volume (V₁) = 3.3 L
Initial pressure (P₁) = 100 KPa
Final pressure (P₂) = 90 KPa
Final volume (V₂) =?
The final volume of the gas can be obtained by using the Boyle's law equation as follow:
P₁V₁ = P₂V₂
100 × 3.3 = 90 × V₂
330 = 90 × V₂
Divide both side by 90
V₂ = 330 / 90
V₂ = 3.7 L
Thus, the final volume of the gas is 3.7 L
What are resistors? please help
Answer:Resistor Basics
Resistors are electronic components which have a specific, never-changing electrical resistance. The resistor's resistance limits the flow of electrons through a circuit.
They are passive components, meaning they only consume power (and can't generate it). Resistors are usually added to circuits where they complement active components like op-amps, microcontrollers, and other integrated circuits. Commonly resistors are used to limit current, divide voltages, and pull-up I/O lines.
Resistor units
The electrical resistance of a resistor is measured in ohms. The symbol for an ohm is the greek capital-omega: Ω. The (somewhat roundabout) definition of 1Ω is the resistance between two points where 1 volt (1V) of applied potential energy will push 1 ampere (1A) of current.
As SI units go, larger or smaller values of ohms can be matched with a prefix like kilo-, mega-, or giga-, to make large values easier to read. It's very common to see resistors in the kilohm (kΩ) and megaohm (MΩ) range (much less common to see miliohm (mΩ) resistors). For example, a 4,700Ω resistor is equivalent to a 4.7kΩ resistor, and a 5,600,000Ω resistor can be written as 5,600kΩ or (more commonly as) 5.6MΩ.
Schematic symbol
All resistors have two terminals, one connection on each end of the resistor. When modeled on a schematic, a resistor will show up as one of these two symbols:
Resistor schematic symbols
Two common resistor schematic symbols. R1 is an American-style 1kΩ resistor, and R2 is an international-style 47kΩ resistor.
The terminals of the resistor are each of the lines extending from the squiggle (or rectangle). Those are what connect to the rest of the circuit.
The resistor circuit symbols are usually enhanced with both a resistance value and a name. The value, displayed in ohms, is obviously critical for both evaluating and actually constructing the circuit. The name of the resistor is usually an R preceding a number. Each resistor in a circuit should have a unique name/number. For example, here's a few resistors in action on a 555 timer circuit:
Answer: resistor is
Explanation:
A resistor controls the flow of the electrical current within a circuit. Resistors are made from materials like copper or carbon, which make it difficult for the electrical charges to flow through a circuit. The most common type of resistor is a carbon resistor, which is a general purpose resistor, best suited for lower-powered circuits.
Solve this puzzle
R+R
what is the radius of a circle i
s
What kind of reaction is 2H202 → 2H20 + O2?
O A. Decomposition
O B. Single-replacement
C. Double-replacement
O D. Synthesis
Answer:
this reaction is so the answer should be A
Am I doing this right?
What is [OH-] of a solution
with a pH of 4.0?
Answer in M
What element is in group 4 and period 3
determine the velocity of a cart traveling at 135cm in 5.5s.
Answer: 0.245 m/s
Explanation:
So velocity = d/t or distance over time in this case m/s or meters per second. But BE CAREFUL you must remember to convert cm to m always so 135 cm= 1.35m and 1.35m/5.5s= 0.245m/s
how many significant figures are in the measurement 12.4 kg
What causes the periodic (recurring)
patterns seen in the periodic table?
If a piece of paper with a mass of 1.3 grams is shredded into pieces and then it's weighed again so what would be the mass of the paper shreds?
Option 1: More than 1.3 grams
Option 2: stays the same (1.3 grams)
or
Option 3: Less than 1.3 grams
Answer:
option 2
Explanation:
Help! Need it ASAP!
Is steam and vapour different? If they are then how are they different?
Answer:
Explanation:
Water vapor is when water molecules are present in the air, while steam is water heated to the point that it turns into gas. In simplified science, both are referred to as the gaseous state of water. Steam is usually white or translucent in nature, while water vapor can be clear or translucent.
Steam is simply, water vapor. Hence, the key difference between steam and vapor is that steam is the gaseous state of water whereas vapor is the gaseous state of any substance. Moreover, steam is typically invisible while the vapor of some substances is colorful.
**PLEASE SHOW YOUR WORK**Calculate how much energy would be necessary to convert 250.0 grams of ice at -30°C to steam at 145°C.
Assume that the only time that liquid water changes to gas is when it is boiling. Please help me
Answer:
Q= mc∆T(ice) + mLF(ice) + mc∆T(water) + mLV(water) + mc∆T(steam)
m=250 g = 0.25 kg = ¼ kg c(ice)= 2100 J/kg.K c(water)= 4200 J/kg.K LF(ice)= 333.7 kJ/kg LV(water)= 2256 kJ/kg c(steam)= 2080 J/kg.K
Explanation:
Q= ¼ × 2100 × (0°-(-30°)) + ¼ × 333700 + ¼ × 4200 × (100°-0°) + ¼ × 2256000 + ¼ × 2080 × (145°-100°)
Q= 15750 + 83425 + 105000 + 564000 + 23400
Q= 791575 J
2.
You take a gas at 3 atm and increase the temperature from 120 K to 240 K. What is the final pressure?
A
6 atm
B
Not enough information
C
3 atm
D
1.5 atm
Answer:
A. 6atm
Explanation:
Using pressure law equation:
P1/T1 = P2/T2
Where;
P1 = initial pressure (atm)
T1 = initial temperature (K)
P2 = final pressure (atm)
T2 = final temperature (K)
According to this question;
P1 = 3 atm
P2 = ?
T1 = 120K
T2 = 240K
Using P1/T1 = P2/T2
3/120 = P2/240
Cross multiply
240 × 3 = P2 × 120
720 = 120P2
P2 = 720/120
P2 = 6atm
1. The chemical formula of caffeine is C8H10N4O2. Determine the percent composition of the molecule.
Show work please
Answer:
we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass
mC=8Ac=8*12=96g
mH=10AH=10*1=10g
mN=4AN=4*14=56g
mO=2AO=2*16=32g
by adding the masses together we find the molar mass of the molecule
M=mC+nH+mN+mO=96+10+56+32=194g/mole
we apply the rule of threes to find the percentage of each element
194g..96gC..10gH...56gN....32gO
100g....a...........b...........c.............d
a=(100*96)/194=49.48%C
b=(100*10)/194=5.19%H
c=(100*56)/194=28.85%N
d=(100*32)/194=16.48%O
Explanation:
Students are investigating the relationship between pressure and temperature in gases. They have blown up a balloon with carbon dioxide from an air tank and connected the balloon to a pressure gauge. The balloon is then submerged in ice or water baths at various temperatures in order to observe the pressure level after several minutes. What is the flaw in the student’s investigation, and how can the students improve their investigation to correctly determine the relationship?
A.
The volume and density of the air in the balloon can change, therefore they need to use several different balloons at different volumes to account for how density and volume affects pressure.
B.
The volume of the balloon can change, therefore they need to use several different balloons at different volumes to account for how volume affects pressure.
C.
The volume and density of the air in the balloon can change, therefore they need to use a rigid container such as plastic or metal to hold the air.
D.
To keep the volume of the balloon from changing, so they can focus on temperature and pressure they need to use a container that does not expand like a balloon. A constainer made of plastic or metal to hold the air.
Answer:
The volume and density of the air in the balloon can change, therefore they need to use a rigid container such as plastic or metal to hold the air.
Explanation:
The number of ions produced when a substance dissolves is always equal to the number of Adams in a chemical formula. What is incorrect about following statement?
Students report that the sky in their area has mostly cirrus clouds. What are most likely the weather conditions in the area?
rainy weather
dark, overcast (blocking the sunlight)
stormy weather
fair, pleasant weather
What happens to the energy of gas particles when an elastic collision takes place?
Select one:
a.The more massive gas particle gains energy
b.The least massive gas particle looses energy
c.The more massive gas particle looses energy
d.No energy is exchanged between the gas particles
Answer:
the answer is D
Explanation:
When the elastic collision happens the particles energy does not change. There is no loss or gain of energy due to the elastic collision.
The energy of gas particles when an elastic collision takes place then "No energy is exchanged between the gas particles"
What is elastic collision?A collision between two bodies that would be elastic occurs when their combined kinetic energy stays constant.
What is energy?Energy is the ability to do tasks. It can exist in various forms, including potential, kinetic, thermal, electrical, chemical, and nuclear.
When two objects collide, there was no net loss of kinetic energy across the system. This is known as an elastic collision. In elastic collisions, momentum, as well as kinetic energy would both be conserved.
Therefore the correct answer will be option (d)
To know more elastic collisions and energy
https://brainly.com/question/2356330
#SPJ2
Why does nobody fking answer my questions.
How did stromatolites contribute oxygen to the early atmosphere?
through methane degradation
through photolysis
by weathering of rocks
through photosynthesis
Answer:
by wearing of rocks
Explanation:
earths gravity your welcome
Answer:
weathering of rocks is the answer to your question
In a chemical reaction between copper metal and silver nitrate, 12.7 g of copper(II) and 64.5 g of silver nitrate react, and 38.1 g of Silver is produced. 21) Predict the products and write the balanced equation and include the physical state of each. 22) What type of chemical reaction is this? 23) Which is the limiting reactant? You must include the work for this to receive full credit. 24) What mass of excess is used up, and what mass is left over? 25) Calculate the percent yield.
Answer:What should you do if you realize during research that your original theory is wrong
Explanation:
What does the steepness of the line on the graph represent?
Answer:
The steepness of a hill is called a slope. The same goes for the steepness of a line. The slope is defined as the ratio of the vertical change between two points, the rise, to the horizontal change between the same two points, the run.
the number of ___ in an atom tells you how many chemical bonds that atom can form
How do we know if molecules have kinetic energy?