248.4 °C
Explanation:
Boiling point: -246 °C
Atomic mass: 20.1797 u
Symbol: Ne
Which students propose a conservation strategy that represents reducing the use of
natural resources?
A Students W and Z
B Students W and X
C Students X and Y
D Students Y and Z
Answer:
student A
Explanation:
How many liters of oxygen are needed to react completely with 81.0 g of aluminum at STP?
A.) 25.2 L
B.) 72.0L
C.) 50.4 L
D.) 67.2 L
Answer:
Volume O₂ at STP = 50.4 Liters
Explanation:
4Al(s) + 3O₂(g) => 2Al₂O₃(s) at STP conditions
81g Al(s) = 81g/27g/mole = 3mole Al
moles O₂ consumed = 4/3(3)moles O₂ = 2.25 moles O₂ consumed
Volume O₂ at STP = 2.25moles x 22.4L/mole = 50.4 Liters O₂
A magnet can pull the iron filings out of a mixture of sand and iron
filings.
TRUE
FALSE
Answer:
this is true
Explanation:
because the sand is left behind for it isn't magnetic
There is a gas pressure in a container that is 123kPa what is the pressure in atmospheres ?
Answer:
In strict SI units (highly recommended), express n in moles, R is the universal gas constant R=8.314Jmol−K , T is the temperature in Kelvins, and the volume V is in m3 . The resulting pressure P will be in Pa. R=0.082054L−atmmol−K , in which case the pressure is calculated in atm.
Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
a. A global wind moving over the ocean
b. A global wind moving over land
Answer:
a global wind moving over the ocean
Explanation:
because it's picking up moisture from the ocean and kind of carrying the water with the wind and water obviously is part of the evaporation so it would kind of turn into water vapor which will have more humidity along with the heat because how the heat warms the water kind of like the sweat from a sweat glands if that makes sense I don't know if that makes sense to you but it makes sense to me lol
Which of the following is not a stimulus?
A hearing a loud noise
B. sneezing
C. touching a hot object
D. tasting a lemon
Answer:
B. sneezing
Explanation:
Because every other one is an action resulting in stimulation.
A teacher performed a demonstration of a chemical reaction by stretching a ballon containing Sodium bicarbonate (baking soda) over the top of a flask containing acetic acid (vinegar). When the sodium bicarbonate was added to the acetic acids the ballon began to inflate shown I'm the figure.
What will the total mass of the flask, the ballon, and products be after the reaction?
A. Less than 100g, because some of the solid baking soda disappears
B. 100g, because all of the atoms of the reactants remain in the flask
C. Less than 100g, because the gas has less mass than the solids and liquids
D. 100g, because the volume of gas inside the balloon has increased
Explanation:
D. 100g, because the volume of gas inside the balloon has increased
In chemical reactions that occurs in closed systems, the amount of matter is conserved. The total mass of the system is conserved because the gas did not escape and the volume has increased,
Answer:
d
Explanation:
give an example of how carbon can cycle through an environment
Really need help!! Don’t understand:( 40 points
If 100.0g of nitrogen gas (N2) is reacted with 100.0g of hydrogen gas (H2) what is the limiting and excess reactants?
Hint: convert grams to moles for each reactant and then convert to moles of NH3. You need your balanced equation from answer 1 to determine the mole relationship between each reactant and the product NH3. Use the periodic table to determine the molar mass of all chemical formulas. Fill in the “?” Blanks below to show your work.
Please please please fill in the blanks...
Molar mass of H2= ____ g/mol
100.0g H2 • 1 mol H2/? g H2 • ? Mol NH3/ ? Mol H2 = ? Mol NH3
Molar mass of N2= ? g/mol
100.0g N2 • 1 mol N2/ ? g N2 • ? Mol NH3/ ? Mole N2 = ? Mol NH3
Molar mass of NH3 = ? g/mol
100.0g N2 • 1 mol N2/ ? g N2 • ? Mol NH3/ ? Mol N2 • ? g NH3/ 1 mole NH3 = g NH3
Pretty please help me :( PWEAASEEEEEEE
15. What is the name of the part of a cell that allows molecules in, such as glucose and oxygen?
a. Cell wall
b. Ribosome
c. mitochondria
d. Cell membrane
Answer:
D
Explanation:
Hope This Help??
Please Mark Me Brainly!!
If Captain America exerted a force of 50N and Iron Man exerted a force of 65N in the opposite direction, what would the outcome be? What is the net force? Who would be pushed backward?
Which of the following is NOT needed
for photosynthesis to happen (select
all that apply)?
carbon dioxide
oxygen
light
water
please help me i’m desperate
Answer:
Oxygen
Explanation:
Plants only need water, sunlight, and carbon dioxide for photosynthesis. Oxygen is produced from photosynthesis.
Which of the following will decrease the rate of dissolution of a gas in a liquid?
a. increase pressure
b. increase temperature
c. decrease agitation
What is the percent of phosphorus by mass in phosphoric acid,
H3PO4?
Use 1.008 g/mol for the molar mass of hydrogen, 16.00 g/mol
for the molar mass of oxygen, and 30.97 g/mol for the molar
mass of phosphorus.
where are examples of short term enivronmental change? check all that apply
A. tsunamis
B. El Niño
C. large asteroid and comet impacts
D. volcanic eruptions
E. global warming
Will mark branliest!! and 50 points for right answer!
1. which solvent resulted in the best separation of ink? oil or alcohol
2. which marker had a red spot or streak with an Rf value of approximately 0.82? Maker 1, 2, 3, or none?
3. which spot has the lowest rf value in the marker 3s chromatogram? yellow or purple?
4. which marker had a yellow spot with an rf value of approximately 0.60? Marker 1,2,3 or none?
Answer:
Alcohol, 0.63 I don't know the rest the rest
Explanation:
Answer:
Explanation:
1. Alcohol
2. Marker 1
3. Purple
4. Marker 2
Filling out the lab paper gives you the answers. These were all correct.
20. What is the momentum of a 0.15-kilogram baseball moving at 20
m/sec?
1,5 kg*m/sec
3 kg*m/sec
O 15 kg*m/sec
O 30 kg*m/sec
A.What will sea levels be in 20 and 100 years compared to now????? B.What will the pH of the ocean be in 20 and 100 years compared to now????
The offsprings' traits depend on which parent the offspring inherited more copies of genes from. True or False?
Answer:
false
Explanation:
i did the test :)
The offsprings' traits depend on which parent the offspring inherited more copies of genes from. This statement is false.
What is gene ?The biological and functional component of heredity was conveyed from parent to child. Genes are bits of DNA, and the majority of genes include instructions for producing a particular protein.
However, it wasn't until Wilhelm Johannsen proposed calling the Mendelian factors of heredity genes that the name began to catch on. The suggested term was derived from the Greek word "genos," which means "birth." The term gave rise to others like genome.
Through their genes, parents transmit features or qualities to their offspring, such as eye color and blood type. There are several illnesses and medical disorders that can be genetically handed down. Sometimes a trait might take on many different forms.
Thus, The offsprings' traits depend on which parent the offspring inherited more copies of genes from. This statement is false.
To learn more about gene, follow the link;
https://brainly.com/question/787658
#SPJ5
is xenon tetrafluoride ionic or covalent?
Answer:
Metal- nonmetal = ionic
Nonmetal-nonmetal = covalent
Xenon is a nonmetal, and so is fluorine.
So, this compound is covalent.
Let me know if this helps!
What is correct about solubility of
substances?
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When does an acid strength increase
A) increasing polarity and increasing bond strength
B)increasing polarity and decreasing bond strength C)decreasing polarity and increasing bond strength D)decreasing polarity and decreasing bond strength
Plz answer mee
Answer: A
Explanation: The increase in acid strength with increasing number of terminal oxygen atoms is due to both an inductive effect and increased stabilization of the conjugate base.
help plzzzzzzz 17 points!!!
Answer:
2 Li(s) + 2 H2O(l) = 2 LiOH(aq) + H2(g)
which two statements describe events that help drive tectonic plate movement?
A. convection currents cause hotter magma to rise and cooler magma to sink.
B. Subducting plates cause cooling at convergent boundaries
C. Thermal energy from Earth's core is transferred outward to the mantle by conduction
D. Energy from the Sun heats magma beneath earth's surface
Answer:
D B
Explanation:
when the other girl thicc
Explanation:
let's make this swamp great again
The process of sediment being dropped off in a new location is called ____________?
Deposition, because it is the dropping of eroded material
Please help I’m stuck
Answer:
wouldn't it be the #2 because +∆H um I forgot
Is a blender (at home) an example of electrical to mechanical energy? If so, why? Please explain thoroughly
Answer:
Yes it is
Explanation:
You use electricity to power the blender itself, then after you power it the potential energy becomes kinetic energy which equals mechanical energy in the blender. So yes, a blender is an example of electrical to mechanical energy.
How many moles are there in 100g oh H2O?
Answer:
5.55 moles
Explanation: