Which situation demonstrates dormancy?

A plant germinates in the spring.
A plant grows leafs laterally.
A plant closes its flowers at night.
A plant becomes inactive and stops growing.

Answer: They are chemically stable gases

Explanation:

Group 18 is also called the noble gases - because they have full valence shells it means they are stable and won't chemically react.

Answer:

1. V = 1.47L

Explanation:

1) Using PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = gas constant (0.0821 Latmk mol)

n = number of moles

T = temperature (K)

To get number of moles, we say mole = mass/molar mass

Molar Mass of C2H2 = 12(2) + 1(2)

= 24 + 2 = 26g/mol

mole = 3.86/26

mole = 0.148mol

T (K) = 28.5°C + 273.15

T(K) = 301.65K

PV = nRT

2.5 × V = 0.148 × 0.0821 × 301.65

2.5V = 3.665

V = 3.665/2.5

V = 1.466

V = 1.47L

R =

PV = nRT

P1 V1\ n1 T1 =P2 V2/ n2 T2

1. What volume, will be occupied by 3.86 g of C2H2 gas (acetylene) at 2.50 atm and a temperature

of 28.5 °C?

2. A gas at 650.0 torr and 75 °C is cooled to 25 °C. What is the pressure of the gas after it has

cooled?

Answer:

2Fe₂O₃

Explanation:

If the number of atoms of each element are the same on reactant and product sides, it is a balanced equation. This is not a balanced equation because the number of atoms of each element are not the same on reactant and product sides.

To balance an equation, let's first list the atoms:

Then, we count the number of atoms on both sides:

We multiply the number of atoms for each element on either side by the number of molecules (aka coefficient, or "big number"):

To balance the equation, we need the total number for Fe on the right side to be 4, and the total number for O on the right side to be 6. We can do that by adding a "big number", or coefficient in front, which when multiplied by the number of atoms for each element, makes a balanced equation.

2 is a good value: 2 × 2 = 4, and 2 × 3 = 6.

As such:

4Fe + 3O₂ → 2Fe₂O₃

Answer:

See explanation

Explanation:

In the section A,B

C triple bond O has a higher bond energy. A triple bond is shorter and more difficult to break hence they have a higher bond energy.

For the same reason in the C,D section; C triple bond N has a higher bond energy.

In the next section, the higher the bond order the shorter the bond. Hence C triple bond C is the shortest in the A,B section while C triple bond O is the shortest in the C,D section. Both have a bond order of 3.

In the A,B section; I is larger than Br hence H-Br has the shortest bond length.

In the C,D section; Br is larger than Cl hence P-Cl has the shortest bond length.

Answer:

a) layer 4

b) layer 1

Explanation:

Older the layer=older the fossils

Newer the layer=newer the fossilss

Answer:

We can use a fan, divide the number of times that fan spins by the time it takes and the speed is obtained

Answer: I am trying 0.88 if it is correct then I will edit this to say that!

Explanation:

Answer:

finely divided iron is used as catalyst in the manufacture of ammonia by haber's process

Answer:

Explanation:

Atom 1 and 4 because they have the same number of valence elctrons in its outermost shell

Answer:

D

they are used for manufacturing Of diodes

Answer:

is the answer D

Explanation:

hsjskajdidbxksbsvzjwvshhz7duw

Answer:

Lateral Inversion

Explanation:

Answer:

bacic

Explanation:

it is very soluble in water

Answer:

cerebral palsy

Explanation:

Answer:

81

Explanation:

Answer:

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Explanation:

Answer: C. There is more plate movement in California.

Explanation:

Answer:

The air above land also warms faster than air above the sea. Cooler higher pressure air above the ocean moves toward warmer lower pressue air above land.

Answer:

Use the sources to help you, but I would say above the water.

Explanation:

"However, water heats up much more slowly than land and so the air above the land will be warmer compared to the air over the ocean. The warm air over the land will rise throughout the day, causing low pressure at the surface. Over the water, high surface pressure will form because of the colder air."

AND

"The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude."

I hope this helps you!

Answer: D

Explanation:  Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest. So the asnwer is helium

Explanation:

Answer:

moon

Explanation:

Answer:

Explanation:

its the moon. the moon covers the sun causing it to be completely blakened out. and if thats not right then lifes a lie cuz i got blinded pretty bad in one of my eyes for looking at it with it

Answer:

8.15 x 10¹⁴Hz

Explanation:

Given parameters:

Energy of photon  = 5.4 x 10⁻¹⁹J

h = 6.626 x 10⁻³⁴J.s

Unknown:

Frequency of the photon = ?

Solution:

The energy of a photon is given as;

          E = hf

h is the Planck's constant

f is the frequency

     f  = [tex]\frac{E}{h}[/tex]   = [tex]\frac{5.4 x 10^{-19} }{6.626 x 10^{-34} }[/tex]   = 8.15 x 10¹⁴Hz

Answer: B) Sperm

Explanation:  For lazy gang wya Lol

Answer:

Sn

Explanation:

Tin, Sn, will have the lowest ionization energy from the given choices.

  Sn is an element is the fourth group on the periodic table.

Ionization energy is a measure of the readiness of an atom to lose an electron. The lower the value, the easier it is for an atom to want to lose an electron and vice versa.

Across a period, I.E increases progressively from left to right due to the decreasing atomic radii caused by the increasing nuclear charge which is not compensated for by successive electronic shells.

       Sn, Sb, Te and I are all in the 5th period.

Electrical energy is caused by moving particles that have a negative or positive charge. These charged particles are called electrons. The faster the electrons are moving, the more electrical energy they carry. Electrical energy commonly moves through a wire in an electrical circuit.

                                     [tex]\huge\boxed{Electrons.}[/tex]

Electrons are particles that move to create electricity. In other words, they are responsible for electric currents. Thus, the answer should be Electrons.

Answer:

Gold is an element even when it is in a solution