Answer:
C) The volume stays the same, but the shape changes to fit the new container.
Explanation:
What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answer:
D
Explanation:
all ya got to do is divide the moles from the solution... so 3.0 divided by 0.25. put it in a calculator
hope this helps
The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
Given,
3.0 moles of Saline (NaCl)
Volume of solution = 0.25L
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
Molarity = 3 ÷ 0.25 = 12 M
Therefore, The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
Learn more about molarity, here:
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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
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????
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
How many moles are there in 100g oh H2O?
Answer:
5.55 moles
Explanation:
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
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;
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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
give an example of how carbon can cycle through an environment
A tall stack of books is sitting on a table. One of the reasons the book stay where they are is because-
Choices:
A: The chair is helping to hold the table up.
B: The table is exerting a balanced force on the books.
C: The books are exerting an unbalanced force on the table.
D: The books keep shifting enough to keep the stack balanced.
Please help me!
when the other girl thicc
Explanation:
let's make this swamp great again
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
I need help, please answer
Answer:
it explodes
Explanation:
Answer:
Mrs girl I'm sorry I don't know
I just need the points
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:
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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.
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.
11.
The characteristics of a group of elements are listed in the table.
Characteristics of a group of Elements
• Solid at room temperature
• Good conductor of electricity
• Atoms have one valence electron
Which of these elements is in this group?
A. Sodium
B. Phosphorus
C. Bromine
D. Neon
Answer:
Sodium
Explanation:
I dont know but its a wild guess
Answer:
sodium
Explanation:
its solid at room temp, most metals are good conductor of electricity and also its in group 1A so it has one valence electron
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:
what is the uncertian digit in 0.054 g
Answer:
5.4g
Explanation:
Which four quantities a, b, c and d are required to balance the equation ...
aAl +bFe2O3 ==> CAl2O3 + dFe?
Answer:
2Al + 1Fe2O3 ---> 1Al2O3 + 2Fe
Explanation:
The values of a, b, c and d required to balance the chemical equation are:
a = 2b = 1c = 1d = 2What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to balance the equationaAl + bFe₂O₃ —> cAl₂O₃ + dFe
Al + Fe₂O₃ —> Al₂O₃ + Fe
There are 2 atoms of Al on the right side and 1 on the left. It can be balanced by writing 2 before Al as shown below
2Al + Fe₂O₃ —> Al₂O₃ + Fe
There are 2 atoms of Fe on the left side and 1 on the right. It can be balanced by writing 2 before Fe as shown below
2Al + Fe₂O₃ —> Al₂O₃ + 2Fe
Now, the equation is balanced.
How to determine the values of a, b, c and d2Al + Fe₂O₃ —> Al₂O₃ + 2Fe
aAl + bFe₂O₃ —> cAl₂O₃ + dFe
Comparing both equations, the value of a, b, c and d are
a = 2b = 1c = 1d = 2Learn more about chemical equation:
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Photosynthesis and cellular respiration have a unique relationship in that the products of one process are the reactants of the other. For example the products of photosynthesis are reactants of cellular respiration.
Select ALL of the molecules that are produced in photosynthesis and then used in cellular respiration.
A) ATP
B) water
C) oxygen
D) glucose
E)carbon dioxide
Answer:
the answer is c) oxygen and D) glucose. Read the question correctly. it says what is *produced* in photosynthesis and *used* in cellular respiration.
Explanation:
photosynthesis produced oxygen and glucose to which cellular respiration uses (glucose and oxygen) to produce carbon dioxide and water. so carbon dioxide and water ARE NOT the answer to this.
also I took the test so yeah
The molecules that are produced in photosynthesis and then used in cellular respiration include the following: oxygen and glucose.
PHOTOSYNTHESIS:
Photosynthesis is the process whereby green plants obtain their own food using energy from sunlight. Photosynthesis generally combines carbon dioxide and water molecules to produce glucose and oxygen as products. 6CO2 + 6H2O → C6H12O6 + 6O2CELLULAR RESPIRATION:
Cellular respiration is the process whereby living organisms obtain energy by breaking down food molecules. Cellular respiration uses the products of photosynthesis, which are glucose and oxygen, to synthesize energy and giving off carbon dioxide and water as products. C6H12O6 + 6O2 → 6CO2 + 6H2OTherefore, molecules that are produced in photosynthesis and then used in cellular respiration include the following: oxygen and glucose.Learn more at: https://brainly.com/question/1388366?referrer=searchResults
True or False
All cells are the same on the inside
HELP ME!
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.
True or False: if chemicals behave in a similar way they are grouped together on the periodic table
Answer:
Explanation: it is true
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.
What is correct about solubility of
substances?
Please help I’m stuck
Answer:
wouldn't it be the #2 because +∆H um I forgot
Which is an example of a physical change?
gasoline combusting
cake baking
salt dissolving
iron rusting
Answer:
salt dissolving
Explanation:
Hope this helps!