PLEZ HELP ANSWER. IM STUCK!

Answer:

i think its k.

Explanation:

position k im sure

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 8.5 mL

density = 80 g/mL

We have

mass = 80 × 8.5

We have the final answer as

Hope this helps you

Answer:

0.00025 m3

Explanation:

it just is; used conversion table

Answer:No

Explanation:

Well yes but no, There cant be high tempreture that is 100 degrees and a low tempreture that is 20 degress, there has to be a mid inbetween both, they cant be next to eachother.

Answer:

2 C7H6O2 + 15 O2 --> 14 CO2 + 6 H2O

Explanation:

Answer:

precipitate

Explanation:

pretty sure it's right but sorry if i'm wrong:)

Answer:

It is true , that the tropical zone experiences the trade winds .

Explanation:

TRADE WINDS -: The trade winds or easterlies are the dominant east-to - west permanent winds that flow in the equatorial area of the Planet (between latitudes 30 ° N and 30 ° S). In the Northern Hemisphere, the trade winds blow primarily from the northeast and from the southeast in the Southern Hemisphere, strengthening throughout the winter and when the Arctic oscillation is in its warm phase. Trade winds have been used by sailing ship captains for centuries to cross the world's oceans and have enabled colonial expansion into the Americas and the construction of trade routes across the Atlantic and Pacific oceans. They act as the steering flow for tropical storms in meteorology. developing over the Atlantic , Pacific, and Southern Indian Oceans and landing in North America, Southeast Asia, Madagascar, and East Africa. Under trade wind regimes, shallow cumulus clouds are seen and are capped from being larger by a trade wind inversion induced by downward air aloft from within the subtropical ridge.

When trade winds blow through tropical areas , due to more direct sunlight , air masses heat up across lower latitudes. Those that develop over (continental) land are drier and hotter than those that develop over (maritime) oceans and travel northward to the subtropical ridge 's western periphery. Masses of maritime tropical air are often referred to as masses of commercial air. There are extensive areas of trade winds in all tropical oceans except the northern Indian Ocean.

Hence , the statement is true.

Answer:

Alkaline Earth Metals

Explanation:

:)

Answer: la masa porque a lo largo del tiempo se fueron creando planetas por todo el universo

Explanation:

Answer:

0.0504

Explanation:

The study of chemicals is called chemistry. The reaction that needs heat to complete the reaction is called an endothermic reaction.

The correct answer to the question is mentioned as follows:-

After solving the question, the correct answer is 0.504 on average of the year.

For more information about the radiation, refer to the link:-

https://brainly.com/question/1453843

Answer:

Transition zone of the sun

Explanation:

Transition Region - The transition region is a very narrow (60 miles / 100 km) layer between the chromosphere and the corona where the temperature rises abruptly from about 8000 to about 500,000 K (14,000 to 900,000 degrees F, 7700 to 500,000 degrees C).

Answer:

Protons and Neutrons

Explanation:

.......................................................

Answer:

A

Explanation:

The moon is connected to the ocoen

Answer:

colloid

Explanation:

Colloid is a type of fog

Answer:

colloid

Explanation:

I got it right on egd

Answer:

Subconscious - psychic activity just below the level of awareness

Election - the act of electing someone

Explanation:

I hope this helped enough, good luck in chemistry!

7.2 / 2.4 = 3 half-lives

(1/2)3 = 0.125 (the amount remaining after 3 half-lives)

100.0 g x 0.125 = 12.5 g remaining

Answer:

a) [tex]BaF_{2}[/tex]

b) [tex]SnCl_{4}[/tex]

c) [tex]Cr_{2}O_{3}[/tex]

d) [tex]FeO[/tex]

e) [tex]Li_{3} P[/tex]

Explanation:

The charges of the ions have to be 0, so they balance.

a) [tex]Ba^{2+}[/tex] has the charge of +2 and [tex]F^{-}[/tex] has the charge of -1. So its [tex]0=(+2)+(-1)*2[/tex]. That means you need one [tex]Ba^{2+}[/tex] and two [tex]F^{-}[/tex] to balance the equation. -> [tex]BaF_{2}[/tex]

b) [tex]Sn^{4+}[/tex] has the charge of +4 and [tex]Cl^{-}[/tex] has the charge of -1. So its [tex]0=(+4)+(-1)*4[/tex]. That means you need one [tex]Sn^{4+}[/tex] and four [tex]Cl^{-}[/tex] to balance the equation. -> [tex]SnCl_{4}[/tex]

c) [tex]Cr^{3+}[/tex] has the charge of +3 and [tex]O^{2-}[/tex] has the charge of -2. So its [tex]0=(+3)*2+(-2)*3[/tex]. That means you need two [tex]Cr^{3+}[/tex] and three [tex]O^{2-}[/tex] to balance the equation. -> [tex]Cr_{2}O_{3}[/tex]

d) [tex]Fe^{2+}[/tex] has the charge of +2 and [tex]O^{2-}[/tex]has the charge of -2. So its [tex]0=(+2)+(-2)[/tex]. That means you need one [tex]Fe^{2+}[/tex] and one [tex]O^{2-}[/tex] to balance the equation. -> [tex]FeO[/tex]

e) [tex]Li^{+}[/tex] has the charge of +1 and [tex]P^{3-}[/tex]has the charge of -3. So its [tex]0=(+1)*3+(-3)[/tex]. That means you need three [tex]Li^{+}[/tex] and one [tex]P^{3-}[/tex] to balance the equation. -> [tex]Li_{3} P[/tex]

Answer:

Contraction. (Science: physiology) a shortening or reduction in size, in connection with muscles contraction implies shortening and/or development of tension. Origin: L. Contractus = drawn together.

Explanation:

hope this helped:)

Answer:

D. The government determines what is right & wrong for everyone

Explanation:

Answer:

1*6

Explanation:

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of liquid = 15 mL

density = 2.5 g/mL

We have

mass = 15 × 2.5

We have the final answer as

Hope this helps you

Answer:

Four significant figures

Explanation:

The number of significant figures is defined as the number of digits that can be assumed to be correct, starting at the left with the first nonzero digit, and proceeding to the right.

Answer:

B: -4

Explanation:

0.000978

0.00978(x10)

0.0978(x10x10)

0.978(x10x10x10)

9.78(x10x10x10x10)

9.78 X (10^4)

9.78X10^-4

because you move the decimal to the left it becomes negative 4

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10  If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer:

3250113.34

Explanation:

Align decimals together

If the other numbers don't have decimals, you can add a decimal and zeros after the decimal as it means the same thing

2 1 1 1

18236.34

3244223.00

+ 7654.00

3250113.34 is the answer

Answer:

-3254795.34

Explanation:

you add 18236.34 and 3244213 and get 3262449.34

then you subtract 7654 from 3262449.34 and get -3254795.34

Answer:

The lattice energy decreases down the group and increases across the period, therefore, the lattice energy of LiF > lattice energy of LiI, and the lattice energy of NaCl < the lattice energy of AlCl₃

Explanation:

The given parameters are;

Compound [tex]{}[/tex]                                    Lattice Energy (kJ/mol)

LiF  [tex]{}[/tex]                                                     1030

NaCl  [tex]{}[/tex]                                                  788

MgCl₂  [tex]{}[/tex]                                                2326

LiI  [tex]{}[/tex]                                                       730

AlCl₃   [tex]{}[/tex]                                                  5376

Lattice is the energy that must be added in order to split one mole of a ionic solid compound into gaseous ions

Given that the force of attraction between charges is inversely proportional to the square of the distance separating the charges, we have that as the atomic radius increases progressively down the group, the lattice energy decreases, therefore, LiF which has a shorter inter nuclear distance than LiI due to fluorine, F, being higher up on the periodic table than iodine, I, has a greater lattice energy than LiI

Similarly, given that the atomic radius decreases across the period, and that sodium, Na, comes before aluminum, Al, as we move across period 3, of the periodic table, the inter nuclear distance between atoms of in NaCl is larger than the internuclear distances between the atoms of AlCl₃, as well as the presence of more chlorine atoms in AlCl₃ than in NaCl, the lattice energy of NaCl is smaller than the lattice energy of AlCl₃.