Answer:
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction.
Magnets exert magnetic force as a result of magnetic field attraction between opposite poles and magnetic field repulsion between same poles.
What are magnets?Magnets are the substance in which north and south poles present and they show attraction towards the different poles and repulsion towards the same pole.
Due to presence of this poles magnets have their own magnetic field and direction of this field governs from north to south pole. Due to this magnetic field magnets exert magnetic force towards some metals like iron and show attraction.
Hence, due to presence of different poles in a magnet, they exerts magnetic force.
To know more about Magnets, visit the below link:
https://brainly.com/question/14997726
Hypothesis: What do you think will happen when you add more magnets to the set up?
Answer:
........................
5 What does 2Na2O mean?
Answer:
2 Na2O means two molecules of Sodium oxide.
mark me please
Help plzzz I don’t get to
An artificial reef is intended to affect the ocean ecosystem by — А A removing pollution from the water B В providing shelter for marine organisms causing sediment to erode into deeper waters D preventing people from overfishing along the shore
Answer:
B
Explanation:
just answered
An artificial reef is intended to affect the ocean ecosystem by providing shelter and habitat for marine organisms causing sediment to erode into deeper waters. Hence, option C is correct.
What is artificial reef ?An artificial reef is a human-made underwater structure, typically constructed with the purpose of enhancing marine biodiversity, providing habitat for marine organisms, and promoting recreational activities like fishing, diving, and snorkeling.
Artificial reefs can be created from a variety of materials, such as concrete, metal, tires, and sunken ships. The reef structure can also increase the overall biodiversity of an area by creating a new habitat for species that may not have been present before.
Additionally, the presence of an artificial reef can help to reduce pressure on natural reefs by providing an alternative location for fishing and other activities. However, artificial reefs are not typically used as a means of removing pollution from the water or preventing erosion.
Therefore, option C is correct.
Find more on artificial reef:
https://brainly.com/question/17238115
#SPJ2
Can someone please help me with this question?
es 3l por 0/0 (1234008×556098
C5H12 + O2 = CO2 + H2O
If 84.3 grams of C5H12 react according to the above equation and the % yield is 94% find the actual yield of grams of carbon dioxide
Answer: 241.6 grams of CO2
Explanation: you take 84.3 grams C5H12 and divide it by 72.15 grams of C5H12(which is the molar mass) you take that answer and calculate the mols of CO2 by multiplying the 1.168 you got before and multiply it by 5. You take the answer you get from that and multiply it by the molar mass of CO2 and get the theoretical yield and then you just plug it in. 94= (x/257.02)x100 and solve to find x which is the actual yield.
Which periodic table has the elements placed in locations that match the information on the flash card?
Answer:
https://quizizz.com/admin/quiz/5902a3fd8d05b2100088880a/cat-1-chemistry-review
Explanation:
Answer:
atomic? hope this helps!
Explanation:
Equation for questions 1-4:
4A1+302 → 2A1203
How many moles of oxygen are needed to react with 7.5 moles of aluminum
Answer:
5.625 moles of oxygen, O₂.
Explanation:
The balanced equation for the reaction is given below:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂.
Finally, we shall determine the number of mole of O₂ required to react with 7.5 moles of aluminum, Al. This can be obtained as illustrated below:
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂.
Therefore, 7.5 moles of Al will react with = (7.5 × 3)/4 = 5.625 moles of O₂.
Thus, 5.625 moles of O₂ is needed for the reaction.
Do you think genetic engineering is ethical? Explain why or why not.
Answer:
Yes
Explanation:
One of the top goals of genetic engineering is the improvement of health. Imagine a world without the threat of AIDS or cancer. Those working in the genetics field hope that manipulating the genes of humans will one day enable science to prevent people from contracting these potentially deadly diseases.
An atom of carbon contains 6 total electrons. How many of these electrons are in s orbitals?
1
2
4
6
Answer:
4
Explanation:
total electrons = 6
electronic configuration = 1s^2, 2s^2, 2p^6
so in s orbital there are 4 electrons.
Hope it helps you (｡◕‿◕｡)
Pls help I’ll mark brainliest pls pls pls
Answer:
the tea was not hot sugar dissolves quickly and hot water than cold
WILL GIVE BRAINLIEST!!!
Use this media to help you complete the question.
There are three known forms of hydrogen. These forms are called (isotopes, ions, copies) of each other. Each of these forms will have the same number of (neutrons, protons, electrons) but different numbers of (neutrons, protons, electrons) in their nuclei.
Answer:
Isotopes, protons, netrons
Explanation:
Answer:
There are three known forms of hydrogen. These forms are called Isotopes of each other. Each of these forms will have the same number of protons but different numbers of neutrons in their nuclei.
Explanation:
What is the mass of 48 ml of a liquid if its density is 1.25 g/ml?
Answer:
60 g
Explanation:
Mass = Density × Volume
Mass = 1.25 × 48
Mass = 60 g
I hope this helps!
A bone contains 6.25% of Carbon -14 it began with. How old is the bone ?
Answer:
Is there a multiple choice??
Explanation:
Oxygen gas, generated by the reaction 2KClO3 (s) 2KCl(s) 3O2 (g) is collected over water at 27°C in a 1.35-L vessel at a total pressure of 1.00 atm. (The vapor pressure of H2O at 27°C is 26.0 torr.) How many moles of KClO3 were consumed in the reaction?
Answer:
[tex]n_{KClO_3}=0.0353molKClO_3[/tex]
Explanation:
Hello!
In this case, according to the experiment, we first realize that the pressure of oxygen is:
[tex]p_{O_2}=1.00atm-26.0/760 atm=0.966atm[/tex]
Next, we compute the moles based off the ideal gas law:
[tex]PV=nRT\\\\n=\frac{PV}{RT}=\frac{0.966atm*1.35L}{0.08206\frac{atm*L}{mol*K}*300K}=0.0530molO_2[/tex]
Thus, since there is 3:2 mole ratio between oxygen and potassium chlorate, we can compute the consumed moles of the latter as shown below:
[tex]n_{KClO_3}=0.0530molO_2*\frac{2molKClO_3}{3molO_2} \\\\n_{KClO_3}=0.0353molKClO_3[/tex]
Best regards!
onsider a tank used in certain hydrodynamic experiments. After one experiment the tank contains 200 L of a dye solution with a concentration of 1 g/L. To prepare for the next experiment, the tank is to be rinsed with fresh water flowing in at a rate of 2 L/min, the well-stirred solution flowing out at the same rate. Find the time that will elapse before the concentration of dye in the tank reaches 1% of its original value.
Answer:
Explanation:
From the given information;
Let Q(t) = mass of dye in the tank as a function of time
The mass in the tank = 200 L × (1g/L) = 200 g
Using the law of mass conservation;
[tex]\dfrac{dQ}{dt} = \text{(Rate of incoming mass)- (rate of outgoing mass)}[/tex]
[tex]\dfrac{dQ}{dt} = (2 L/min ) (0 \ g/L) - (2 L/min ) (\dfrac{Q}{200}g/L)[/tex]
[tex]Q' = \dfrac{-Q}{1000}[/tex]
Q(0) = 200
By finding the solution to the ODE using the method of separation of variables;
[tex]\dfrac{Q'}{Q} = -0.01[/tex]
[tex]Q(t) = Ce^{-0.01t}[/tex]
Using the initial condition;
200 = Q(0) = C
[tex]Q(t) = 200e^{-0.01t}[/tex]
1% of 200g = 2g of dye solution
∴
[tex]2 = 200e^{-0.01t}[/tex]
[tex]e^{-0.01t}=0.01[/tex]
[tex]t =\dfrac{ In(0.01}{-0.01}[/tex]
t = 460.5 hours
Me without you is like a nerd without braces, A shoe without laces, aSentenceWithoutSpaces.
Answer:
LOL
Explanation:
Covert 175g of H2O into moles.
Answer:
9.72 moles.
Explanation:
From the question given above, the following data were obtained:
Mass of H₂O = 175 g
Number of mole H₂O =?
Next, we shall determine the molar mass of H₂O. This can be obtained as follow:
Molar mass of H₂O = (2×1) + 16
= 2 + 16
= 18 g/mol
Finally, we shall determine the number of mole H₂O. This can be obtained as follow:
Mass of H₂O = 175 g
Molar mass of H₂O = 18 g/mol
Number of mole of H₂O =?
Mole = mass /Molar mass
Number of mole of H₂O = 175/18
Number of mole of H₂O = 9.72 moles
Psychology **
Richard often has hallucinations of his father who has passed away and has delusions that he is under constant government surveillance. What
is Richard likely to be suffering from?
A anxiety disorder
OB. personality disorder
OC, mood disorders
OD
schizophrenia
Answer:
D
Explanation:
Write the formula of the conjugate base of the Brønsted-Lowry acic, HF
Answer:
Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.
Explanation:
hope this helps
The formula of the conjugate base of the Bronsted-Lowry acid, HF is represented as F⁻.
What is the Bronsted-Lowry concept?The Bronsted-Lowry theory can be described as an acid-base reaction where acid and base react with each other and by an exchange of proton acid, produces its conjugate base and the base creates its conjugate acid.
The Bronsted-Lowry concept is actually an extended version of Arrhenius's theory of acid base. According to the Bronsted-Lowry concept, acid is a substance that donates a hydrogen ion or a proton and forms its conjugate base and the base is a substance that accepts proton and produces its conjugate acid.
Bronsted-Lowry acid can be represented as:
Acid ⇄ Conjugate base + H⁺
The conjugate base of Bronsted-Lowry acid HF can be represented as follows:
HF ⇄ F⁻ + H⁺
Therefore, fluoride ion F⁻ is the conjugate base of the Bronsted-Lowry acid HF.
Learn more about the Bronsted-Lowry concept, here:
https://brainly.com/question/14407412
#SPJ6
Buffers are substances that help resist shifts in pH by Question 10 options: 1) releasing H in acidic solutions. 2) donating H to a solution when they have been depleted. 3) releasing OH- in basic solutions. 4) accepting H when the are in excess. 5) donating H to a solution when they have been depleted and accepting H when the are in excess.
Answer:
5) donating H to a solution when they have been depleted and accepting H when they are in excess.
Explanation:
A buffer solution is a solution that undergoes a negligible change in pH in addition of moderate quantities of acid or alkali. In other words, a buffer solution is one that resists a change in pH on addition or dilution of small amounts of acids or alkalis.
So, from the given question:
Buffers are substances that help resist shifts in pH by donating H to a solution when they have been depleted and accepting H when they are in excess.
Which statement describes steps involved in the production of hydroelectric power?
A. Falling water turns a turbine that helps generate electricity.
B. Moving water turns a paddle wheel that helps generate electricity.
C. Water falls down a pipe to generate electricity.
D. Potential energy of water is directly transformed into electrical energy.
pls help
Plot the point (5,9)
100 points to whoever can give me seinen manga suggestions. Vagabond, Berserk, Oyasumi Punpun, Homunculus, 20th Century Boys are some I’ve already read. Avoid those
Explanation:
sorry I really need the points in so sorry have a good day
Please help, it's a task in science and I'm really bad at this subject.
Answer:
1. solid
2. liquid
3. plasma
4. gas
Those are the four parts of matter.
Explanation:
I hope this helps.
determine the empirical and molecular formulas of a compound that gives the following analysis in math percent: 24.27% C,4.07% H, and 71.65%CL. the molar mass is known to be 197.92g/mol.
Answer:
help me with this
Explanation:
Jewelry and tableware are sometimes made of sterling silver. Sterling silver is 92.5% silver (Ag) and 7.5% copper (Cu). If you wanted to make 30 grams of sterling silver for a ring, how many grams of silver and copper would you need to start with?
Amount of sterling silver?
Amount of copper?
total grams of alloys needed?
Answer:
12.33
Explanation:
92.5/7.5= 12.33
30g of the sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.
What is cross multiplication?Cross multiply fractions by multiplying one fraction's denominator by the other fraction's numerator and then comparing the two values. The larger fraction is the one with the higher value.
100g of sterling silver contains 92.5g of silver and 7.5g of copper.percentage of element = amount of the element present in 100 g of materialTherefore,
100g sterling silver = 92.5g silver30g sterling silver = X g silver( cross multiplication),
100 × X = 92.5 × 30
X = 92.5 × 30/ 100
X= 27.75g silver100g sterling silver = 7.5g copper
30g sterling silver= Y g copper
(cross multiply)
100 × Y = 7.5 × 30
Y= 7.5 × 30 / 100
Y= 2.25g copperX (silver)= 27.75 g in 30 g of sterling silverY (copper)= 2.25 g in 30 g of sterling silvertherefore, 30g of sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.
To learn motre about cross multiplication, refer to:
https://brainly.com/question/28839233
#SPJ2
What property of water is primary for living organisms? (SC.6.E.7.4) *
It is odorless.
It does not conduct electricity.
It is tasteless
It is liquid at most temperatures on Earth.
*20 points* I wil mark brainliest
Answer:
It is liquid at most temperatures on Earth.
Which one of the following ionic solids would have the largest lattice energy?
CaBr2
CsI
CaCl2
NaCl
NaF
Answer:
CaCl2
Explanation:
The ionic solid CaCl₂ would have the largest lattice energy. Therefore, option (c) is correct.
What is the lattice energy?Lattice energy is the heat of formation when one mole of crystalline ionic solid is generated from its constituent ions in their gaseous state.
For example, the lattice energy of sodium chloride crystal is the energy change of reaction when Na⁺ and Cl⁻ ions react to produce a NaCl crystal, which is equal to -786 kJ/mol.
The relation between lattice energy and lattice enthalpy at constant pressure is given by:
ΔU (lattice) = ΔH (lattice) - PΔV
Lattice energy is directly proportional to the charge on ions and inversely proportional to the interionic distance between ions.
For NaCl and NaF the charge on the ions is +1 and -1 while the size of the ions is small. So they have less lattice energy.
CsI ionic solid have a larger size of ions Cs⁺ and I⁻. So CsI will have less lattice energy. CsBr₂ has +2 charge on calcium but the size of both ios is larger. So, CsBr₂ will have less lattice energy.
CaCl₂ has + 2 charge on calcium as well as the ionic radius is also samll. Therefore, CaCl₂ would have the largest lattice energy.
Learn more about lattice energy, here:
https://brainly.com/question/13169815
#SPJ2
The energy associated with a current is called____________
(A) mechanical energy
(B) magnetism
(C) geothermal energy
(D) electrical energy
Answer:
D. Electrical energy
Explanation:
I assume you are talking about an electrical current.
(These are by what I know and are simplified, not an exact definition)
A. Mechanical energy is energy that something has because of motion.
B. Magnetism is the attracting and repulsing forces between magnets.
C. Geothermal energy is heat inside of the Earth. Used as source of power.
D. Electrical energy is the result of an electric charge.