Metals form positive ions and nonmetals negative ions
Explanation:
Metal atoms become positively charged ions because they lose electrons when they react with another atom.Metals are situated on the left side of the periodic table. Group 1 and group 2 are called the alkali metals and alkaline earth metals. These metal atoms have valence electrons in an s orbital.Non-metal atoms become negatively charged ions because they gain electrons when they react with another atom.Ions are charged particles formed when atoms lose or gain electrons. This loss or gain makes the outer shell of the atom stable. Metals have fewer electrons compared to nonmetals in the outermost shell.how is a series circuit different from a parallel circuit?
A series circuit has two or more loops and a parallel has only one loop for the current to flow through.
A series has an open circuit and a parallel circuit has a closed circuit
A series circuit has only one loop and a parallel circuit has two or more loops for the current to flow through
A series circuit has a closed circuit and a parallel circuit has an open circuit.
Answer:
C. A series circuit has only one loop and a parallel circuit has two or more loops for the current to flow through
Explanation:
A circuit that are made of one loop is called series circuit. On the other hand, the parallel circuit has at least two loops. The circuit type has nothing to do with open or closed circuit.
If any part of the series circuit got cut, the current will stop flowing since there is only one loop. A parallel circuit has more loop so the circuit might still work even if a part of the circuit got cut.
Why is the ocean water near the poles less salty than other places?
Question 8 options:
Rain washes mineral ions from the land into water.
Fresh water from the glaciers are melting into it.
Active underwater volcanoes erupt nearby.
Earthquakes shake rock loose nearby.
Answer:
Rain washes mineral ions from the land int water.
Explanation:
The amount of rain is highest at the equator and lowest at the poles. Due to this heavy amount of rain at the equator areas minerals get washed from land to the water. The washed minerals when be in the watery medium the either dissolve or dissociate to different ions according to their nature. The dissolution or dissociation of minerals in the water releases various salts in the medium and it becomes salty because of their presence in higher amounts.
Answer:
Fresh water from the glacier are melting into it.
Explanation:
Fresh water, in the form of water vapor, moves from the ocean to the atmosphere through evaporation causing the higher salinity. Toward the poles, fresh water from melting ice decreases the surface salinity once again. ... Adding salt to water lowers the freezing temperature.
PLZZZZZ HELP MEEEEEE
2 Li + H2SO4 → Li2SO4 + H2
If 1.5107 moles of Li are reacted with 0.0745 moles of H2SO4, how many moles of H2 will be produced?
Answer:
0.0745 mole of hydrogen gas
Explanation:
Given parameters:
Number of H₂SO₄ = 0.0745 moles
Number of moles of Li = 1.5107 moles
Unknown:
Number of moles of H₂ produced = ?
Solution:
To solve this problem, we have to work from the known specie to the unknown one.
The known specie in this expression is the sulfuric acid, H₂SO₄. We can compare its number of moles with that of the unknown using a balanced chemical equation.
Balanced chemical equation:
2Li + H₂SO₄ → Li₂SO₄ + H₂
From the balanced equation;
Before proceeding, we need to obtain the limiting reagent. This is the reagent whose given proportion is in short supply. It determines the extent of the reaction.
2 mole of Li reacted with 1 mole of H₂SO₄
1.5107 mole of lithium will react with [tex]\frac{1.5107}{2}[/tex] = 0.7554mole of H₂SO₄
But we were given 0.0745 moles,
This suggests that the limiting reagent is the sulfuric acid because it is in short supply;
since 1 mole of sulfuric acid produced 1 mole of hydrogen gas;
0.0745 mole of sulfuric acid will produce 0.0745 mole of hydrogen gas
ANSWER ASAP AND I WILL GIVE BRAINLYEST!!!!
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface. I think its B
Answer:
oceans transfer energy from the sun. They do so , in order to exchange heat and moisture to the sky and earth influencing weather systems accordingly.
The ocean influences weather patterns by distributing heat and moisture around the globe. ... Tropical storms form over warm ocean waters, which supply the energy for hurricanes and typhoons to grow and move, often over land. The winter storms that bring precipitation to the western U.S. originate over the North Pacific.
PLEASE ANSWERRRR
Materials that are good conductors are so because
A. They are positive and always attract electrons
B. The protons are relatively mobile.
C. Some of their electrons are free to roam through the atomic structure
D. All of their electrons can be completely removed from the nucleus.
Answer:
Option C. Some of their electrons are free to roam through the atomic structure
Explanation:
Materials which conduct electricity have free mobile electrons.
3. Which element is most important for growing crops?
a. carbon dioxide
BA
b. hydrogen
C. calcium
d. nitrogen
4. Who discovered how to manipulate equilibrium systems?
Answer:
B. hydrogen
Explanation:
that's because hydrogen is an element.
ASAP taking exam rn
Which of the answers does not represent a common type of air pollution? A) agricultural ammonia B) carbon monoxide exhaust C) sulfur oxide D) synthetic organic compounds E) industrial nitrogen oxide
Answer:
D)
synthetic organic compounds
Explanation:
synthetic organic compounds are water pollutants
20ml of 2M KOH are placed into a beaker. 4M CH 3 COOH are placed into a burette.
a. Predict what volume of CH 3 COOH will be needed to neutralize the KOH.
Volume of CH3COOH will be needed to neutralize the KOH is 10 ml.
Explanation:
In the titration process the concentration of unknown analyte be it acid or base is calculated by the formula:
Macid x Vacid = Mbase x Vbase equation 1
Data given:
volume of base KOH = 20 ml
molarity of base = 2M
Molarity of CH3COOH acid = 4 M
Volume of CH3COOH acid = ?
Putting the values in the equation 1
4 x V acid = 20 x 2
V acid = [tex]\frac{40}{4}[/tex]
V acid = 10 ml
The neutralization of KOH by CH3COOH will be done by using 10 ml of 4M solution of CH3COOH against 20 ml of 2M KOH.
May someone help me with a few questions?
Answer: again these are equations you should know; I hope you WILL LEARN them, and how to write your own; these must have come from the book or lecture, and I do not want to berate you, I want you to improve more every day. But it is very late here, and I must finally go. Study hard!
No matter what, study hard.
I loved research; tons of fun, meeting new people, and learning new things.
Hopefully many people here will also.
I bid you all a Good Night.
Explanation:
A gas that has a volume of 28 liters, a temperature of 42°C, and an unknown pressure has its volume increased to 49 liters and its temperature decreased to 27°C. If the pressure is measured after the change at 4.0 atm, what was the original pressure of the gas?
Answer:
7.35 atm
Explanation:
From the question we are given;
Initial volume, V1 as 28 LInitial temperature, T1 as 42°C or 315 KNew volume. V2 as 49 LNew temperature, T2 as 27°C or 300 KNew Pressure, P2 as 4.0 atmWe are required to determine the initial pressure, P1
We are going to use the combined gas law...
According to the combined gas law,
[tex]\frac{P_{1} V_{1} }{T_1} =\frac{P_2V_2}{T_2}[/tex]
Therefore, to get P1
[tex]P_1=\frac{P_2V_2T_1}{V_1T_2}[/tex]
We get;
[tex]P_1=\frac{(4.0)((49)(315)}{(300)(28)}[/tex]
[tex]P_1=7.35[/tex]
Therefore, the initial pressure of the gas is 7.35 atm
How could this gravitational potential energy be transformed into kinetic energy?
A.
He could start the engine.
B.
He could release the brakes.
C.
He could push it up the hill.
D.
all of these
Answer:
d
Explanation:
all of these turn potential energy into kinetic energy because they start the engine and move the car
Answer:
Explanation: B relase breaks
what’re the answers?
What characteristic does it have as a gas that it did not have as a liquid?
Answer:
Like liquids, gases have no definite shape, but unlike solids and liquids, gases have no definite volume either. The change from solid to liquid usually does not significantly change the volume of a substance.
Explanation:
How are water-based solutions formed?
A. Solutions are formed when the water’s polar molecules separate the nonpolar molecules of the solute.
B. Solutions are formed when the water’s nonpolar molecules form stronger bonds between the solute’s molecules.
C. Solutions are formed when the nonpolar molecules of the water cause the solute to dissolve and disperse unevenly.
D. Solutions are formed when the water’s polar molecules separate the polar molecules of an ionic or molecular compound.
Answer:
D. Solutions are formed when the water’s polar molecules separate the polar molecules of an ionic or molecular compound.
Explanation:
Solutions are homogeneous mixtures formed by interaction between solutes and solvents.
Water based solutions have water as the solvents and mostly ionic and molecular compounds as their solutes.
Water is a polar solvent that is capable of dissolving many compounds by hydrating them. The molecules of water surrounds the solute and forces them to separate.