Answer:
The epicenter is the same distance from both recording stations
Explanation:
ΔT is the time between anomaly occurrence and the origin time of the earthquake.
Now, we are told both stations had the same value for ΔT.
This means that their points on the earth's surface which vertically above the focus of the earthquake is the same and thus we can conclude that the epicenter is the same distance from both stations.
Hey I need help with 84-88
Answer:
84. 3
85. 6
86. 3
87. 6
Explanation:
84. 3
85. 6
86. 3
87. 6
A family from Ottawa turned off the heat before flying to Florida for a winter holiday. When they came home, all of their water pipes had burst. What do you think happened?
Explanation:
In the extreme winters , the water inside pipes freeze, on freezing it's(water molecule) density decreases and volume increases and therefore, the ice then expands and pushes the water towards the faucet, causing high pressure buildup in the pipe and after a limit the pipe burst. This is what happened to the family in Ottawa, where winters are chilly.
Answer:
Since their family turned off the heat, it should be cold, the pipes must be freezing, and there is water in the pipes which means the water in the pipes is freezing causing it to burst.
A student writes down several steps of the scientific method. Put the steps in the best order.
Answer:
doe sit have a picture-
Explanation:
Explain how atoms are held together in covalent bonds. Give an example of a covalent compound.
Answer:
Explanation:
Atoms are held together by covalent bonds when they share electrons between themselves.
Covalent bonds are bonds that are formed between non-metals usually with a low electronegative difference between them. In this bond type, two non-metals donate electrons which are shared between the combining atoms and this makes them both like the corresponding noble gases. The shared electrons is what forms the covalent bonds.
An example of covalent bond is HCl, H₂S, SO₂, CO₂, O₂ etc
What is the cause of discoloring of Taj Mahal
Answer:
Fossil fuels and biomass combustion.
Explanation:
The mass combustion of fossil fuels and biomass results in the vast release of Black Carbon (BC) and Brown Carbon (BrC) and dust. These Black Carbon, light absorbing organic Brown Carbon and dust cause the discolouring and yellowing of the surface of Taj Mahal building.
Answer:
Acid rain causes discoloring Taj Mahal
Explanation:
concentrations
1) calculate the mass of sucrose and the mass of water (in grams) that must be used to prepare 400 g of 50% by mass of sucrose solution. since a solvent is present in greater proportion than the solute in a solution, do these terms still apply at 50% by mass concentration? why?
2) if a wine sample is 12.0% by volume ethanol, how many milliliters of ethanol is present in a bottle containing 500.0 mL of the wine? if other alcoholic drinks have relatively high concentration 35 to 50% (v/v) ethanol, is wine safer to drink before driving? why?
3) a pancake recipe recommends a 65% (v/v) sugar syrup concentration. if you wish to prepare the recipe and you only have 50 g of sugar at home, how will you prepare the syrup? if based on the recipe, one pancake will need 5 mL of the syrup, how many pancakes should you make to use all the syrup you made?
pls help >.
Answer:
The glucose concentration is measured in mM, the abbreviation for "milliMolar". The molar (M) concentration of a solution is a measure of how much solute (the component of a solution present in lesser amount, often a solid) there is in a given volume of solution. After swirling the flask to dissolve the solid, water is added carefully until the bottom of the meniscus coincides with the calibration mark on the neck of the flash.
What is the energy of a photon using the given frequency and Planck's
constant. *
Frequency (v)= 5.2x10155-1
h=6.626x10-34j.s
Answer:
Energy of photon is 34.45 ×10⁻¹⁹ J.
Explanation:
Given data:
Frequency of photon = 5.2×10¹⁵ s⁻¹
Plancks constant = 6.626×10⁻³⁴ Js
Energy of photon = ?
Solution:
Formula:
E = h.f
by putting values,
E = 6.626×10⁻³⁴ Js × 5.2×10¹⁵ s⁻¹
E = 34.45 ×10⁻¹⁹ J
Thus, energy of photon is 34.45 ×10⁻¹⁹ J.
Use these images to identify each state of matter.
Match each image with the correct state of matter.
A:
B:
C:
A
B
С
Answer:
Just too clarify its actually
A: gas
B: solid
C: liquid
Answer:
She is correct the answerts above
Explanation:
brainliest good luck !!!
The total number of electrons in a neutral atom of every element is always equal to the atom's
A) mass number
B) number of protons
C) number of neutrons
D) number of atomic particles
Answer:
Number of Protons
Explanation:
The number of Protons is always equivalent to the amount of electrons that are on the outside of the atom
Which is a homogeneous mixture?
a. pure substance
b. element
c. solution
d. compound
Please help me.
Look at the periodic table shown in the video and determine the number of protons inside gold(Au) Atoms, mercury (Hg) Atoms and Silver (Ag) atoms
Which statement BEST describes elements that would create the MOST polar bonds?
A) Elements from the top left and the bottom right of the periodic table.
B) Elements from the bottom left and the top right of the periodic table.
C) Elements from the top left and the top right of the periodic table.
D) Elements from the bottom left and the bottom right of the periodic table.
Answer: It is B) Elements from the bottom left and the top right of the periodic table.
Explanation: Elements from bottom left and top right will create the most polar bonds. electronegativity generally increased from bottom left to top right of the periodic table
How was the Periodic Table of Elements developed and how are the elements arranged on it?
Answer:
Following are the solution to this question:
Explanation:
Mendeleev has been the chemist that designed a periodic table for component identification based on the increasing number of elements. Thus, the is traditionally called a table parent and this periodic table had some drawbacks.
Consequently, Mosley rebuilt Mendeleev's periodic table to once again overcome this disadvantage. Which atoms were arranged as per the increasing order of atomic number instead of mass number. The traditional table, therefore, comprises seven horizontal lines regarded as cycles. But 18 control limits were named group lines.
The whole Periodical Tables is classified as a,p,d, and f block
S block, groups have 1 and 2.
P block, group has 13-18
D block, group has 3 to 12
F block, – Two lines far below the periodic table.
Which substance is most likely to form in a precipitation reaction?
A) calcium nitrate
B) copper(I) nitrate
C) iron(I) chloride
D) iron(II) sulfide
E) potassium sulfate
Answer:
(d) Iron (II) sulfide (FeS) is precipitated most likely and is an renowned ore of iron. (e) Potassium sulfate (K₂SO₄) is like to remain mostly in its ionic form and has less tend to precipitate. Thus FeS will be more likely to be precipitated.
Explanation:
Brainliest please?
DNA bases are attached to _____.
sugar molecules
both sugar and phosphate molecules
phosphate molecules
Answer:
sugar molecules......
What is the name of the acid CH3COOH
Answer:
CH3COOH is Acetic acid.
Calculate the grams of NaCl (5.5 by mass) in 250 grams of commercial bleach solution
Mass of NaCl L 13.75 g
Further explanationGiven
The solution of 5.5% by mass
mass of commercial bleach solution : 250 g
Required
mass of NaCl
Solution
Percent mass (% w/w) = percent mass of solute in 100 g mass of solution
Solution = solute + solvent
Solute = NaCl
Solution = Commercial bleach
Can be formulated :
[tex]\tt \%mass(w/w)=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]
Input given values in formula :
[tex]\tt \%mass=\dfrac{mass~NaCl}{mass~commercial~bleach}\times 100\%\\\\5.5\%=\dfrac{mass~NaCl}{250}\times 100\%\\\\mass~NaCl=\boxed{\bold{13.75~g}}[/tex]
i need help mbrainliest
Answer:
Heterogeneous- C, Homogeneous-D, Emulsion-B, Colloid-A
Explanation:
Which of the following must be transformed into electrical energy when biomass is used as an energy resource?
chemical energy
mechanical energy
nuclear energy
radiant energy
Answer:
Nuclear Energy is the answer
what causes a change in a state of matter? Help please
Answer:
Going through a phase. Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). Physical changes can also be caused by motion and pressure.
Explanation:
Hope this helps :)
2nd time posting someone please help
Answer:
Sb: Antimony
Si: 14 (atomic Number)
S: 32.06 u (atomic mass)
Explanation:
2k+Cl2=2KCI how many grams of KCl is produced from 8.50 g of K and excess Cl2
Answer:
Mass = 16.4 g
Explanation:
Given data:
Mass of K = 8.50 g
Mass of KCl produced = ?
Solution:
Chemical equation:
2K + Cl₂ → 2KCl
Number of moles of K:
Number of moles = mass/ molar mass
Number of moles = 8.50 g/ 39 g/mol
Number of moles = 0.22 mol
Now we will compare the moles of potassium and potassium chloride.
K : KCl
2 : 2
0.22 : 0.22
Mass of KCl:
Mass = number of moles × molar mass
Mass = 0.22 mol × 74.55 g/mol
Mass = 16.4 g
For the people that can’t find the answer for this here it is
Answer:
wow
Explanation:
When Dora's Father puts oil in the car, he is protecting the engine from what force? a. Inertia b. Friction c. Velocity d. Motion btw its not chemistry its science-
Answer:
Friction
Explanation:
In the research scenario, Dora's father uses engine oil to shield engine pumps from friction and injury. Friction is a force among contact objects that slip or threaten to slide over each other.
What is the defintion of speed of light
Answer:
a fundamental universal constant, the speed at which light and all forms of electromagnetic radiation travel in a vacuum, standardized ...
Explanation:
299 792 458 m / s
The volume of a container of gas is 2.65 L and is at a temperature of 22.4°C. What is the new volume if
the temperature is increased to 99.6 °C?
A) 11.8L
B) 3.34 L
C) 0.596 L
D) 10.6L
Answer:
B) 3.34
Explanation:
V1/T1 = V2/T2
So V2= (T2xV1)/T1
Side note Temp for using gas law is always kelvin (Celsius +273.15)
Volume is always in Liters
So V2 = (372.6Kx2.65L)/295.55L
Which results in 3.34L
please help asap 18 points if help and right answer please
Answer:
Lithium = 8%
Bromine = 92%
Explanation:
To calculate percent composition, you must:
- Calculate the molar mass.
- Divide the subtotal for each element's mass by the molar mass.
- Convert to a percentage
With that being said, given LiBr (Lithium Bromide), calculate the molar mass:
Lithium has an atomic weight of 7, and there is one Lithium atoms in LiBr. Bromine has an atomic weight of 80, and there is one Bromine atom in LiBr:
[tex]1(7)\\1(80)[/tex]
Add the two products:
[tex]80+7[/tex]
[tex]=87[/tex]
The molar mass of LiBr is about 87 grams.
With that information, divide the subtotal of Lithium by the molar mass, and then multiply by 100 to convert to a percentage:
[tex]\frac{7}{87}[/tex] × [tex]100=[/tex]
8.0459%
(Round to nearest percentage):
8%
Therefore, the percent composition of Lithium in the compound Lithium Bromide is about 8%.
Now, divide the subtotal of Bromine by the molar mass, and then multiply by 100 to convert to a percentage:
[tex]\frac{80}{87}[/tex] × [tex]100=[/tex]
91.9540
(Round):
92%
Therefore, the percent composition of Bromine in the compound Lithium Bromide is about 92%.
what element is this atom? need the answer in 30 minutes. Feel free to answer the other questions. NEED HELP!
Answer:
fluorine
Explanation:
I used the number of electrons to determine it.
Answer:
Ya, definetly fluorine if you want confirmation!
What is a "period"? What does it represent?|I
Answer: The end of a sentence
Explanation:
Answer:
it ends a sentence
Explanation:
I am 16 years old.
How many grams are there in 9.4 x 1025 molecules of H2?
Answer:
Mass = 312 g
Explanation:
Given data:
Number of molecules of H₂ = 9.4 × 10²⁵
Mass in gram = ?
Solution:
First of all we will calculate the number of moles of H₂.
1 mole of H₂ contain 6.022× 10²³ molecules
9.4 × 10²⁵ molecules × 1 mol / 6.022× 10²³ molecules
1.56× 10² mol
156 moles of H₂:
Mass in gram:
Mass = number of mole × molar mass
Mass = 156 mol × 2 g/mol
Mass = 312 g
