Answer:Attemted Failed
Maybe try to search
In a different way like:
what is the ingredient of cake
Instead of
how to make Cake
What is the energy of a photon of violet light with a frequency of 7.79*[tex]10^{14}[/tex] [tex]s^{-1}[/tex]? (answer in joules)
Answer:
[tex]E=5.16\times 10^{-19}\ J[/tex]
Explanation:
Given that,
The frequency of violet light, [tex]f=7.79\times 10^{14}\ Hz[/tex]
We need to find the energy of a photon. The formula for the energy of a photon is given by :
[tex]E=hf\\\\E=6.63\times 10^{-34}\times 7.79\times 10^{14}\\\\E=5.16\times 10^{-19}\ J[/tex]
So, the energy of a photon is equal to [tex]5.16\times 10^{-19}\ J[/tex].
questions.
1) The degree of polarity of a bond is indicated by
A. Ionization energy difference
B. The shape of the molecule
C. Electronegativity difference
D. The partial charges of the molecule
2) When electrons are shared unequally, chemists characterize
Answer:
d
Explanation:
the partial charges of the molecule
Hey I'm Chloe can you Help me, Thank you :)
What pigment, only present in plants, makes photosynthesis possible?
Answer:
la photosintesis viene de la clorofila de la planta
Which statement are part of the safety protocol for this lab experiment?
Answer:
Always wear safety goggles when performing an experiment.
Use caution when constructing the track.
Ensure that the track is clear before releasing cars.
Report all accidents to the teacher.
Explanation:
Determine the correct set-up below to determine what mass, in grams, of N2 is needed to completely react with 105 g F2 ?
Answer:
C: 1 mol F2/38 g F2
Explanation:
The reaction equation is;
N2 + 3F2 = 2NF3
Now, to know how many grams, of N2 is needed to completely react with 105 g F2 and since the molar mass of N2 is 28.02 g/mol, Molar mass of F2 is 38 g/mol, number of moles attached to N2 and F2 in the reaction are 1 and 3 moles respectively, then we will have;
105 g F2 × 1 mol F2/38 g F2 × 1 mol N2/3 mol F2 × 28.02 g N2/1 mol N2
Option C is Thus correct
15g of sugar and 10g of water are measured separately. The sugar is dissolved in the water. What will
the mass of the solution be?
Answer: a) No, both are different.
b) Ramesh- 9.9%
Sarika - 10%
Explanation:
According to the solution prepared by Ramesh,
Mass of sugar he took (Solute) = 10 g
Mass of water he took (Solvent) = 100 g
Thus Mass % of the solution =
According to the solution prepared by Sarika,
Mass of sugar she took (Solute) = 10 g
Mass of Solution she took = 100 g
Thus Mass % of the solution =
Explanation:
Question number 12 I need help
Answer: Its B.
Explanation:
i cant quite explain
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many g of hydrogen gas are formed when 125.0 g of sodium are added to water?
2Na + 2H2O → 2NaOH + H2
I have 8 valence electrons, completely nonreactive, and my family contains Helium that is used to fill balloons! I must be a...
a
metal
b
nonmetal
c
metalloid
d
noble gas
Answer:
Noble gas
Explanation:
Noble gases are complete octets ( have 8 valence electrons) Helium is a member of this family.
SOMEONE HELP WITH THAT THING PLSSS( I also didn’t know what to put as the topic)
Answer:
hope this helps
Explanation:
Water was on earth with the dinosaurs and almost at the very start.
Water starts anywhere from clouds to ponds
I choose ponds, water evaporates from the sun and moves its way through the air being collected into clouds in the atmosphere, clouds are evaporated water molecules, then the water combines to form rain wich then end up on a hill and travel back to a water source or goes into the ground and makes groundwater and if there is enough rain overtime will form a pond.
An element ceases to be that element if the particle it loses or gains is a neutron.
True or false
Answer:
False
Explanation:
An element is named according to the number of protons in the nucleus. If it gains or loses a neutron, it becomes a different isotope of the same element.
The given statement is false.
Answer:
FALSEExplanation:
#CARRYONLEARNING
At what temperature would a 1.30 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 ∘C/m .
Answer:
-4.59°C
Explanation:
Let's see the formula for freezing point depression.
ΔT = Kf . m . i
ΔT = Freezing T° of pure solvent - Freezing T° of solution
Kf = Freezing constant. For water if 1.86°C/m
m = molality (moles of solute in 1kg of solvent)
i = Van't Hoff factor.
0°C - Freezing T° of solution = 1.86°C /m . 1.30m . 1.9
Freezing T° of solution = - (1.86°C /m . 1.30m . 1.9)
Freezing T° of solution = - (1.86°C/m . 1.30m . 1.9) → -4.59°C
NaCl → Na⁺ + Cl⁻
if water is added to a 0.70 molar solution of CuSO4 what will change
A. molarity will increase
B. Molarity will decrease
C. the amount of CuSO4 will decrease
D. No change in molarity or amount of salute
Answer:
B. Molarity will decrease
Explanation:
Molarity is one of the measures of the molar concentration of a solution. It is calculated by dividing the number of moles of the solute by the volume of the solvent. This means that the higher the amount of solute in relation to the volume of solvent, the higher the molarity of that solution.
In essence, adding water to a solution dilutes it i.e it increases the solvent's volume in relation to the solute, causing the molarity to decrease. In a nutshell, diluting a solution (by adding water or more solvent) causes the molarity of such solution to decrease. For example, if water is added to a 0.70 molar solution of CuSO4, the molarity of the solution will DECREASE.
How many moles of gas would be present in a gas trapped within a 37.0 L vessel at 80.00C at a pressure of 2.50 atm
go here is the answer key
http://msschmidly.weebly.com/uploads/2/6/2/0/26201624/gases_review___calculations.pdf
According to ideal gas equation, there are 271472.7 moles of gas present in a gas trapped within a 37.0 L vessel at 80.0°C at a pressure of 2.50 atm.
What is mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons .Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Substitution of values in ideal gas equation gives,n= 2.5×37/8.314×353=271472.7 moles.
Learn more about moles,here:
https://brainly.com/question/26416088
#SPJ3
The gravitational force between two masses is proportional to
A.
the difference between the masses.
B.
the first mass divided by the second mass.
C.
the product of the masses.
D.
the sum of the masses.
Answer:
D.
the sum of the masses.
Explanation:
List and Describe the two groups of clastic sedimentary rock.
Answer:
Clastic sedimentary rocks are formed from rock fragments or clasts; chemical sedimentary rocks precipitate from fluids, and biochemical sedimentary rocks form as precipitation from living organisms.
Sedimentary rock is classified into two groups based on how they form. They are clastic and chemical. Clastic sedimentary rock is formed as bits of weathered rock become cemented together. Because all kinds of rock are subject to weathering many different minerals can make up this group of rocks.
Facts about flooding
Answer:
No region is safe from flooding. All 50 states are subject to flash floods.[1]
Flash floods can bring walls of water from 10 to 20 feet high.[2]
A car can be taken away in as little as 2 feet of water.[3]
To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[4]
Flooding is caused by spring thawing (snow and frozen grounds melting in the spring), heavy rains, snow melt runoffs, flash floods, and mudflows.[5]
Floods are the most widespread natural disaster aside from wildfires. 90% of all U.S. natural disasters declared by the President involve some sort of flooding.[6]
In preparation for a flood, it is important to stock up on first aid items, non-perishable foods, 3 gallons of water per person for 3 days, battery operated radio for weather reports, extra batteries, personal hygiene necessities.[7]
Based on Floodsmart, a 2,000 square foot home undergoing 12” of water damage could cost more than $50,000.[8]
Since flood damage is almost never covered by homeowners insurance, flood insurance is important for people living in high-risk flood zones.[9]
To stay safe during a flood, go to the highest ground of floor possible. If your skin comes in contact with flood water, make sure to wash it with soap and disinfected water because the contents are unknown.[10]
Communities particularly at risk are those located in low-lying areas, near water, or downstream from a dam.[11]
How can you model the movement of a primary wave?
Answer:
P-waves (primary or compressional waves) are longitudinal or compression waves, able to move through solids, liquids, and gases at speeds ranging between 300-5,000 metres per second. As they travel through rock, they move particles back and forth in the same direction that the wave is moving
Explanation:
A solution of 1.8274g of a polypeptide in 274mL of a aqueous solution has an osmotic pressure at 31.40 degrees C of 2.012 mmHg. The approximate molecular weight of this polymer is _____ g/mol.
Answer: Hence, the approximate molecular weight of the poymer is 64106 g/mol
Explanation:
[tex]\pi=CRT[/tex]
where,
[tex]\pi[/tex] = osmotic pressure of the solution = 2.012 mm Hg = 0.0026 atm
i = Van't hoff factor = 1 (for non-electrolytes)
Mass of solute (polypeptide) = 1.8274 g
Volume of solution = 274 mL
R = Gas constant = [tex]0.0821Latm/Kmol[/tex]
T = temperature of the solution = [tex]31.40^0C=(273+31.40)K=304.4K[/tex]
Putting values in above equation, we get:
[tex]0.0026=\frac{1.8274 g\times 1000}{M\times 274ml}\times 0.0821\times 304.4[/tex]
[tex]M=64106g/mol[/tex]
Hence, the approximate molecular weight of the poymer is 64106 g/mol
Why are most anions basic in H2O? Give formulas of four anions that are not basic.
Answer:
The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.
Explanation:
Which is most often used to destroy bacteria?
how many grams of Al(no2)3 should be added to 1.3L of water to prepare a 2.0M solution
Answer: 429 grams of [tex]Al(NO_2)_3[/tex] should be added to 1.3 L of water to prepare 2.0 M solution
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
[tex]Molarity=\frac{n}{V_s}[/tex]
where,
n = moles of solute [tex]Al(NO_2)_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{165g/mol}[/tex]
[tex]V_s[/tex] = volume of solution in Liters
Now put all the given values in the formula of molarity, we get
[tex]2.0M=\frac{xg}{165g/mol\times 1.3L}[/tex]
[tex]x=429g[/tex]
Therefore, 429 grams of [tex]Al(NO_2)_3[/tex] should be added to 1.3 L of water to prepare 2.0 M solution
Assignment Prompt
In this assignment, you will research the relationship between different types of energy when energy is
being transformed. You will present your findings in the form of bar graphs or pie charts that show the
forms of energy at different times in the process. You will then create a poster to display your findings.
Your poster should include a title, a brief description of the energy transformation you are showing, your
graphs, and works cited.
Assignment Instructions
Step 1: Gather materials and necessary information.
a) You will choose an energy transformation to show. Some of the ones you have learned about
include those that occur in a burning bonfire and a wind turbine.
• Do research to find out about an energy transformation that affects your daily life.
• Find out what the starting types of energy are and what the ending types of energy are.
• Decide how many steps in the process your poster will show.
• Create bar graphs or pie charts to show the relationship between the different types of
energy at different steps in the transformation process.
b) Be sure to keep a list of your references so you can cite them later.
Step 2: Decide on a title.
a) Begin by deciding on a title for your poster and writing it neatly at the top.
b) The title should identify the energy transformation you are showing.
Step 3: Create your graphs.
a) Decide how many graphs you will need to show the energy transformation.
b) You should have at least 3 graphs so that the steps of the transformation will be clear.
c) Each graph should be clearly labeled.
d) Careful use of color on your graphs will make them easy to read and understand.
Step 4: Decide on the descriptive words to include on your poster.
a) People looking at your poster may need more information than just the title and the
graphs. Decide on how you want to present the information your viewers need.
b) Keep the information as short as possible while still including what you need. Remember that
when people look at a poster, they focus on the graphics.
Step 5: Decide on the best layout for your poster.
a) You want to incorporate your text and visuals in a way that is attractive and attention-getting.
b) Keep your graphics as large as possible.
Step 6: Put your poster together.
Step 7: Cite your sources.
a) In the lower right-hand corner of your poster, create a section titled Works Cited.
b) List the resources you used to create your poster. A simple list of website titles and
addresses (URLs) is acceptable. If you used print sources, list the title, author, publisher, city,
and date. The print for this section can be small; it needs to be readable close-up.
Step 8: Identify yourself as the creator of the poster.
a) Place your name in the lower right-hand corner of the poster.
b) On the back, write your teacher’s name and the due date for the poster.
Step 9: Evaluate your poster using this checklist.
If you can check each criterion below, you are ready to submit your presentation.
Yes No Evaluation Question
Does your poster have a title that grabs interest and tells what your subject is?
Are the graphs clearly labeled?
Are the graphs bright and colorful?
Is the text on the poster clearly written so that the viewer understands what you are trying
to show?
Is it free from misspellings?
Is your poster laid out in a way that invites people to look at it?
Have you included your name and works cited?
Is your entire poster neat and attractive?
Step 10: Revise and submit your poster.
a) If you were unable to check off all the requirements on the checklist, revise your poster
before submitting it.
b) Ask your teacher for further instructions about presenting your poster to an audience of your
peers.
Resource Suggestions
• Bar Graph
• Pie Chart
please help! you need to make a poster with any kind of paper and no drawing and if you do any drawing on the poster make it the skill of a 6th grader 100 points plus brainly if you get it right
Answer:
give other guy brainliest
Answer:El mercantilismo en Gran Bretaña consistió en la posición económica de que, para aumentar la riqueza, sus colonias serían proveedoras de materias primas y exportadoras de productos terminados. El mercantilismo provocó muchos actos de lesa humanidad, incluida la esclavitud y un sistema de comercio desequilibrado.
Explanation:
If 0.700 moles Ag is reacted with 10.0 g S, is sulfur or aluminum the limiting reactant?
Answer: [tex]S[/tex] is the limiting reagent
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} S=\frac{10.0g}{32g/mol}=0.3125moles[/tex]
[tex]\text{Moles of} Ag=0.700moles[/tex]
[tex]2Ag+S\rightarrow Ag_2S[/tex]
According to stoichiometry :
1 mole of [tex]S[/tex] require = 2 moles of [tex]Ag[/tex]
Thus 0.3125 moles of [tex]S[/tex] will require=[tex]\frac{2}{1}\times 0.3125=0.6250moles[/tex] of [tex]Ag[/tex]
Thus [tex]S[/tex] is the limiting reagent as it limits the formation of product and [tex]Ag[/tex] is the excess reagent.
Which of the following best describes the difference between metals and nonmetals?
a
metals tend to have low melting points and nonmetals have high melting points
b
nonmetals are more reactive than metals
c
metals are brittle and dull
d
metals have high melting points and are malleable, whereas, nonmetals have lower melting points and tend to be brittle.
Answer:
the answer is d.
Explanation:
because metals are refers to natural elements that are hard, shiney, opaque, and dense. nonmetals implies thise chemical substances that are soft, non-shiney, transparent and brittle.
Can someone please fill in the blanks?
Answer:
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Answer:
helium formula He
Ammonia formula NH3
methane formula CH₄
chlorine formula Cl-
Explanation:
Multiplication & Division
Language of Chemistry
llus
Perform the following
mathematical operation, and
report the answer to the correct
number of significant figures.
0.008 : 51.3
[? ? ] x 100)
Enter
Answer:
0.008 ÷ 51.3 = 0.00015594541910331380.00015594541910331382Round 0.0001559454191033138 → 0.0002 (Sig Figs: 1)
Characteristics of a substance that describe its' ability to change into a different substance are called?
Help please for this problem.
If the knot (W) travels 2 meters in 1 second, we say it has a _____ of 2 m/s.
Answer:
we say it has a speed of 2m/s