Answer: See explanation
Explanation:
The sun is a star that's made up of several gases. It is known to be the most vital source of energy to living things.
Despite the importance of the sun in our lives, it's still harmful when one is exposed to it. They rays of light that's given our by the sun can be harmful to us.
Being exposed to the sun can cause sunburn and this can result in the damage of skin cells and development of cancer. Also, sunlight can lead to early aging as the skin ages faster when one is exposed to the sun.
Furthermore, exposure to sunlight can lead to eye injuries the tissue in our eyes can be damaged by the UV rays. Lastly, it also brings about lowered immune system.
Complete the sentence:
The north pole of a magnet____ the north pole of another magnet.
-will attract
-may repel, attract, or not affect
-will not affect
-will repel
the north pole of the magnet will repel the north pole of another magnet
Using the human species as an example, explain why physical appearance or morphology is NOT always useful for identifying organisms belonging to the same species.
Answer:
Get SNS
Explanation:
The attraction between water molecules and a Nation or a Clion occurs because water molecules are —
A.
nonpolar
B
symmetrical.
С
polar.
D
linear.
Answer:
answer is
c. Polar
hope this helps
Calculate the pOH and the pH of a 5.0 x 10-2 M solution of NaOH.
Answer:
pOH = 1.3, pH = 12.7
Explanation:
Since NaOH is a strong base, it will completely ionize; further, since it completely ionizes, our hydroxide concentration (a product of the ionization) will be the same as the given concentration of NaOH.
NaOH -> Na⁺ + OH⁻, [OH⁻] = 5.0 x 10^-2 M
pOH is the negative log of the hydroxide concentration, so plug our hydroxide concentration in:
pOH = -log[OH⁻] = -log[5.0 x 10^-2 M] = 1.3
Since pH + pOH = 14, we can plug in pOH and solve for pH:
pH + 1.3 = 14
pH = 14 - 1.3 = 12.7
Thus, our pOH = 1.3 and pH = 12.7.
please help me asap. NO LINKS I WILL REPORT YOU!!!!
the galvanometer is not measuring any electricity despite all wires being hooked up. Why could this be?
Answer: you can find out information about Wheatstone bridge.
Explanation: maybe resistors are adjusted such a way that current through
Galvanometer is zero. There is no picture.
Answer:
mmh maybe the connections arent right
Explanation:
coz when u mess up even a bit current wont flow
Describe the composition of a molecular compound. What are two major characteristics of molecular compounds?
Answer:
A molecular compound is composed of two or more non metallic elements that are held together by covalent bonds.
The two major characteristics of molecular compounds are;
1.) They are held by covalent bonds
2.) They generally have poor conductivity
Explanation:
A molecular compound is one where two or more molecules come together to form a compound. Unlike ionic compounds that combine by the transfer of electrons, molecular compounds form by sharing electrons. The pairing of the electrons is what holds the molecules together and is known as covalent bonding.
A molecular compound has various characteristics, some of which are;
- Generally low melting and boiling points
- Soft solid forms
- Low enthalpy of fusion and vaporization.
But the two major characteristics of molecular compounds are;
1.) They are held together by covalent bonds.
The elements in a molecular compound share their electrons by having their atoms bond chemically to each other.
2.) They generally have poor conductivity
Molecular compounds do not conduct electricity and heat properly. Because they are formed by sharing electrons, they usually have no free electrons left to conduct electricity.
Need help plssss!!!!!
Answer:
a
Explanation:
becsaus
Round the following number to 3 significant figures:
15937
pls helpppp
Answer:
15900
Explanation:
I think hope this helps!! :D
Answer:
15900
Explanation:
Which of the following is an indication that a substance has undergone a chemical change?
A.
No new product has been formed.
B.
The color of the substance has not changed.
C.
The original constitute has not changed.
D.
The molecular structure has changed.
Answer:
D.
Hope it helps!!!!!!!!!
El mercurio ha sido utilizado como elemento para medir la temperatura porque Es una mezcla. Al aumentar la temperatura se dilata con facilidad. Es un buen conductor del calor. Es un buen conductor de la electricidad.
Answer:
La respuesta correcta es: Al aumentar la temperatura se dilata con facilidad
Explanation:
El mercurio (Hg) es un elemento metálico que a temperatura ambiente es un líquido. Tiene la propiedad de dilatarse con facilidad al aumentar la temperatura, propiedad que ha sido utilizada en los termómetros de mercurio. En estos termómetros, el mercurio está dentro de un tubo de vidrio graduado con un bulbo para transmitir el calor. Al estar en contacto con un cuerpo más caliente (a mayor temperatura), el mercurio del interior del termómetro se dilata (expande su volumen) y asciende por el tubo indicando la temperatura correspondiente, graduada en el vidrio.
Which object is smaller than a cell?
Molecule
Organ
Organism
Tissue
Answer:
Molecule
Explanation:
Levels of organization (atom-molecule-cell-tissue-organ-organ-system-organism)
why is the air so warm at the equator
Answer:
C
Explanation:
Same reason as the answer before mine, but the answer to your questionaire is C.
Read the temp what is it?
17.3 or 17.25??
Answer:
I would say 17.25.
Explanation:
What is the mass of 1.50 mole of (NH4)2CO3?
Answer:
144.12873
Explanation:
Hope this helps you
-----------------------------------------------------------------------------------------------------------------
回答：
144.12873
説明：
これがお役に立てば幸いです
Answer:
96gm/mole
Explanation:
(NH 4)2CO 3 =2×18+12+3×16=96gm/mole
Which statement regarding this equation is TRUE?
4Fe (s) + 3O2 (g) —> 2Fe2O3 (s)
There are 2 reactants.
The coefficient on O2 is 8.
Iron (III) oxide is a gas.
There are 5 atoms of oxygen on the reactant side.
Answer:
iron (III) oxide is a gas
WILL GIVE BRAINLIST
In the Neighborhood
Ahn vigorously scrubbed windows, a tedious necessity for her family's new Vietnamese restaurant. They had turned the building from homely to gorgeous, but everything had to be absolutely perfect: unique decorations, skillful employees, and fabulous traditional food. Then customers would adore the place, making the business a success.
Ahn shifted her vision to look outside the restaurant as a girl about her age, with abundant red hair, strolled up the street. Ahn’s family had recently moved to this neighborhood, so she had few friends.
The girl paused to study the sign announcing their opening and then looked directly at Ahn with a friendly smile. Ahn smiled back shyly and lifted a hand, accidentally waving with the cleaning cloth. The girl laughed at her amusement and waved back in acknowledgment.
Ahn hesitated, not accustomed to initiating friendship, but she felt courageous, so on a whim she opened the door. "Hello," she said, adding the first thing that entered her head, "do you like Vietnamese food?"
"I don't know, but I like to try new things,” the girl remarked, and then she introduced herself as Gabriela.
Ahn could not think of additional conversation until she had a sudden idea. "Please wait here," she requested, "and I'll be right back." She ran into the adjoining kitchen and explained her idea to her father. He was sympathetic, so seconds later Ahn presented a small package to Gabriela. "Some Vietnamese candy for you to try,” she explained. “If you enjoy it, I hope you'll return to the restaurant sometime, or even visit after school when I'll be here preparing for the dinner service."
"Excellent, I'll see you around soon.” Gabriela headed down the street, glancing back with a cheerful wave. Ahn spent the remainder of the afternoon hoping Gabriela really would return and not think Ahn’s gift was weird.
The following day, Ahn assembled bouquets of artificial flowers, orchids that would never wilt. She was admiring her accomplishment when she heard unexpected tapping and turned to see Gabriela beckoning to her with a plate covered with transparent plastic wrap. Ahn grinned with enthusiasm and opened the door with a cordial greeting.
Gabriela presented the plate and said, "I brought biscuits made from my grandmother's recipe to thank you for the delicious candy.”
"Come in, and we can have some biscuits right now," Ahn stammered, happy inside.
Gabriela entered and rotated to scan the room with its picturesque landscape mural. "Thanks, they really are wonderful, and I'm fascinated to see your restaurant."
As they snacked on the treats, Ahn fumbled for conversation and considered an offer. "Are you good with vocabulary?” she inquired. "I intend to design a publicity pamphlet for the restaurant, and I could use some assistance."
"Certainly!" Gabriela said, adding, "I'm delighted you moved into the neighborhood and thrilled I have a new friend."
Ahn grinned, now positive that the restaurant would make a wondrous impression on the community, that customers would be plentiful, and that she was going to enjoy life here immensely
Write a brief summary of the passage you just read “In the Neighborhood”. (Use at least 4 sentences).
This story is about two girls beginning a friendship. What do they do to become friends? What are some examples from the text to support your answer? (Use at least 3 sentences).
Why do you think Ahn was nervous to make friends? (Use at least 2 sentences).
Have you ever done anything to make a friend with someone? How did it turn out? (Use at least 3 sentences).
Have you ever moved to a new place or started something new? Were you nervous? Did anyone help you? (Use at least 3 sentences).
no links please
Answer:
The restraunt was amess when it was first moved into, the girl there was not fimilliar with making friends but she racked up the courage to talk to the little girl who was comming in. They soon started to build on a friendshoip that started a littl rough. But they soon becaume good friends.
Well they are both around the same age and are girls and probably don't have muh experience with that.
She was nervous to make friends because she was not really accustomed to that.
Yes and good.
Explanation:
first time on here, using my frieds old account, sorry for the spelling im in a test. Hope this hellps
1.9x10^23 atoms of sulfur to grams of sulfur
Answer:
see explanation and punch in the numbers yourself ( will be better for your test)
Explanation:
If you are given atoms you need to divide by Avogadro's number 6.022x10^23
then you will have moles of sulfur-- once you have moles multiply by the molar mass of sulfur to go from moles to grams
mm of sulfur is 32 g/mol
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the grams of sulfur in 1.9x10²³ atoms of sulfur is 9.92g.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance.
Given number of atoms= 1.9x10²³atoms
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
Substituting the values
mole=1.9x10²³÷ 6.022×10²³
mole = 0.31 mole of sulfur
Mole = given mass÷ Molar mass
Molar mass of sulfur=32g/mol
mass of sulfur =0.31 mole ×32g/mol
mass of sulfur=9.92g
Therefore, the grams of sulfur in 1.9x10²³ atoms of sulfur is 9.92g.
To know more about mole, here:
https://brainly.com/question/15209553
#SPJ2
please help on this question it’s the only one i can’t do !!
Answer:
70%of 2000 = 1400
2000 tonnes of hematite contains 1400 tonnes iron oxide .
1400 tonnes of fe2O3
fe2O3 have molar mass 159.69
calculate moles = given mass/molar mass
moles = 1400000000/159.69
moles = 8766986
one mole contains = 112 g of fe
so 8766986 moles will contain = 112×8766986
= 981,902,432 grams of ferrous
which is nothing but equal to 981.90 tonnes of iron!!
what element has 5 protons, 7 electrons, and 6 neutrons
Answer: Boron
Explanation: lol
Answer:
Boron. (What kind of name is that?????????????)
Explanation:
What does the charge tell you about an atom?
Brainliest!!!!!!
Answer:
The charge will tell you if the atom is neutral, positive, or negative. "The charge of an atom is the number of protons minus the number of electrons."
A 1.5 L pocket of air with a temperature of 295 K rises in the atmosphere. What will be the volume of the air pocket of the t temperature decreased to 2 celsius and the pressure is not changed.
Answer:
1.4 L.
Explanation:
Applying Charles law,
V/T = V'/T'....................... Equation 1
Where V = Initial volume, V' = Final volume, T = Initial Temperature in Kelvin, T' = Final Temperature in Kelvin.
Make V' the subject of the equation
V' = (V/T)T'..................... Euqation 2
Given: V = 1.5 L, T = 295 K, T' = 2 °C = (2+273) K = 275 K
Substitute these values into equation 2
V' = (1.5/295)275
V' = 1.398
V' ≈ 1.4 L
WIll give brainliest! : In the following Punnett square, what is the phenotypic percentages of the offspring? From dwarfism slideshow - length of legs.
Answer:
75% will have long legs and 25% will have short legs
Explanation:
I NEED HELP PLEASE ASAP THANK YOU!
Answer:
K = °C +273
°C = K - 273
1. 59 °C.
2. 300K.
5. 673K
6. 927 °C
When the volume and concentration of a base that completely neutralizes an acid is known, you can determine the concentration of the acid due to at the point of neutralization, the number of moles of acid equals the number of moles of base.
why does this happen? (btw this is describing titration) the criteria for the answer is
"Try to answer why the results occurred. If you are in chemistry, what is happening at the molecular level with bonding, electrons, etc. " WILL MARK BRAINLIEST!!!!
Answer:
30
Explanation:
Plate Tectonics Independent Practice,
Label The Diagram With The Correct Information.
Answer:
1st Diagram (at the left) → Mid-Atlantic Ridge
2nd Diagram (at the right) → Andes Mountains
3rd Diagram (below) → San Andreas Fault
Explanation:
I have been able to label the diagram with the correct information.
The 1st diagram at the left is the Mid-Atlantic Ridge. This is a divergent plate boundary that is found at the floor of the Atlantic Ocean. It is also seen as part of the mountain range in the world. The Mid-Atlantic Ridge also includes a deep rift valley. This rift valley runs along the axis of the ridge. This is along nearly its entire length.
The Andes Mountains is found along the Pacific Ring of Fire. It is seen in a Mesozoic–Tertiary orogenic belt of mountains. The Andes rises due to the compression of the western rim of the South American Plate. It is a result of tectonic plate processes.
San Andreas Fault is known to form the tectonic boundary which exists between the Pacific Plate and the North American Plate. The motion of the fault is right-lateral strike-slip. It divides into three segments.
QUESTIONS
40. Because stimulants
will be compromised.
your ability to use proper judgment on the road
A. increase your heart rate
B. overload your nervous system
C. slow down your bodily functions
D. usually cause hallucinations
Answer:
B.
Explanation:
Would a rollercoaster have the greatest kinetic energy at the top of the highest hill or at the bottom on the highest hill
Answer:
The rollercoaster has the lowest kinetic energy at the top of the hill.
The rollercaoster has the highest kinetic energy at the bottom of the hill.
Explanation:
The kinetic energy of any solid body in motion is usually computed using this formula:
K.E = [tex]\frac{1}{2}mv^2[/tex]
From this, we can see that it varies based on two major parameters - The mass of the moving object and the velocity of the moving object.
We can assume that the mass of the rollercoaster is constant since no one gets off and it does not shrink in its size during the ride.
This means that the variations in the K.E are mainly coming from its velocity.
At the top of the hill, the rollercoaster is moving at its slowest pace. hence, it has the lowest kinetic energy at the top of the hill.
However, at the bottom of the hill, the rollercoaster is moving its fastest, hence it has the highest kinetic energy at the bottom of the hill.
Which phrase best describes an individual organ?
O A. The simplest unit of life
O B. Made of different kinds of tissues
C. Made of one kind of cell
O D. Meets all the needs of an organism
Answer:
made of different kinds of tissues
Explanation:
cause that's the only one that makes sense because it goes: cell, tissues,organ,organ system , organism
1. the simplest unit of life - cell
2. a individual organ - would be made of different kinds of tissues
3. tissues - would be made of one kind of cell
4- an organ system - meets all the needs of a organism
also it wouldn't make sense for a individual organ to be made of only one kind of cell so yeah
good luck :) I hope this was right
Q3. When copper (II) chloride reacts with silvernitrate, copper (II) nitrate and silverchloride are formed.Write the balanced equation for the reaction given above:A.CuCl2(aq) + 2 AgNO3(aq) →Cu (NO3)2(aq) + 2 AgCl(s)B.CuCl2(aq) + NaNO3(aq) →Cu (NO3)2(aq) + AgCl(s)C.CuCl2(aq) + 2 NaNO2(aq) →Cu (NO2)2(aq) + 2 AgCl(s)D.CuCl(aq) + NaNO3(aq) →Cu NO3(aq) + AgCl(aq
Answer:
See explanation
Explanation:
When we are writing chemical reaction equations, we must ensure that such equations are balanced. That is, the number of atoms of each element on both sides of the reaction equation are exactly the same.
After we identify the formula of each compound in the reaction, then we proceed the write the balanced reaction equation as follows;
CuCl2 + 2AgNO3 -------> Cu(NO3)2 + 2AgCl
In an effort to sanitize his water, Beethoven knows that bromine can be used to purify water. If Beethoven has 2.12 x 1022 formula units of aluminum bromide are reacted with excess chlorine gas, how many milliliters of liquid bromine (density = 3.12 g/mL) are formed?
Answer:
2.7 mL
Explanation:
The equation of the reaction is;
2AlBr3 + 3Cl2 -----> 2AlCl3 + 3Br2
Number of moles in 2.12 x 1022 formula units of aluminum bromide
1 mole of AlBr3 = 6.02 * 10^23 formula units
x moles = 2.12 x 1022 formula units
x = 2.12 x 1022 formula units * 1 mole/ 6.02 * 10^23 formula units
x = 0.0352 moles of AlBr3
According to the reaction equation;
2 moles of AlBr3 produces 3 moles of Br2
0.0352 moles of AlBr3 produces 0.0352 moles * 3 moles /2 moles
= 0.0528 moles of Br2
Mass of Br2 produced = 0.0528 moles of Br2 * 159.808 g/mol
Mass of Br2 produced = 8.44g
But density = mass/volume
volume = mass/density
volume of Br2 = 8.44 g/ 3.12 g/mL
volume of Br2 = 2.7 mL
