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3 years ago

Select the statement that best describes components of complete and incomplete metamorphosis. (2 points)

Chemistry

2 answers:

yarga [219]3 years ago

6 0

Answer:

Complete metamorphosis and incomplete metamorphosis are two growth types of insects where the body form of insects changes during their lifecycle. ... Complete metamorphosis consists of four stages: egg, larva, pupa, and adult. However, the incomplete metamorphosis consists of three stages: egg, nymph, and adult

Leona [35]3 years ago

6 0

Answer:

The answer is

Explanation:

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Please need help with number 1

Pavlova-9 [17]

One of them is Neatness

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3 years ago

When magnesium reacts with hydrochloric acid, hydrogen gas is formed: 2HCl + Mg → H2 + MgCl2. What is the volume of hydrogen pro

Maksim231197 [3]

Answer:- C. 16.4 L

Solution:- The given balanced equation is:

$2HCl+Mg\rightarrow H_2+MgCl_2$

From this equation, there is 2:1 mol ratio between HCl and hydrogen gas. First of all we calculate the moles of hydrogen gas from given grams of HCl using stoichiometry and then the volume of hydrogen gas could be calculated using ideal gas law equation, PV = nRT.

Molar mass of HCl = 1.008 + 35.45 = 36.458 gram per mol

The calculations are shown below:

$49.0gHCl(\frac{1molHCl}{36.458gHCl})(\frac{1molH_2}{2molHCl})$

= $0.672molH_2$

Now we will use ideal gas equation to calculate the volume.

n = 0.672 mol

T = 25 + 273 = 298 K

P = 101.3 kPa = 1 atm

R = $0.0821\frac{atm.L}{mol.K}$

PV = nRT

1(V) = (0.672)(0.0821)(298)

V = 16.4 L

From calculations, 16.4 L of hydrogen gas are formed and so the correct choice is C.

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3 years ago

1.)What is the molarity of a solution that contains 55.0 grams of Na2SO4 in 250 milliliters of solution? (The mass of one mole o

Maurinko [17]

1)1.549=1.55M

2)may include all of these characteristics

3)stronger the acid

4)lower the concentration of H3O+ ions

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3 years ago

Birds have tetrachromacy, which is the presence of four types of cone cells. According to this information, which statement is t

Pachacha [2.7K]

Answer:

Explanation:

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2 years ago

Read 2 more answers

Does atomic radius increase or decrease as you go down a group/family on periodic table?

SVEN [57.7K]

The atomic radius increases as we go down a group/family on a periodic table.

Explanation:

"Atomic radius" is defined as the "one-half of the distance" between the "nuclei of two atoms". While moving down the group in a periodic table there is an "increase in quantum number n" which allows the valence electrons to occupy on higher levels. This shows that the valence electrons move away from the nucleus, which makes them to be loosely held. Thus, atomic radius is large.

Similarly while moving across the periodic table from "left to right" the atomic radius gradually decreases.

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3 years ago