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3 years ago

A large glycogen molecule is converted into may smaller glucose molecules.what type of chemical reaction is this

1 answer:

5 0

Answer is: catabolism.

Missing question:
Synthesis.
Catabolism.
Rearrangement.
Anabolism.
Catabolism (the set of metabolic pathways) breaks down large molecules (in this example glycogen, a polysaccharide) into smaller units (in this example glucose, a monosaccharide).
Glycogen is the main storage form of glucose in the body.

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25 grams of Mg react with 20 grams of HCl.

nekit [7.7K]

Answer:

1) Mg; 2)18 g

Step-by-step explanation:

1) Identify the limiting reactant

We have the masses of two reactants, so this is a limiting reactant problem.

We know that we will need a balanced equation with masses, moles, and molar masses of the compounds involved.

Step 1. Gather all the information in one place with molar masses above the formulas and masses below them.

M_r: 24.30 36.46

Mg + 2HCl ⟶ MgCl₂ + H₂

Mass/g: 25 20

Step 2. Calculate the moles of each reactant

Moles of Mg = 25 g × 1 mol/24.30 g

Moles of Mg = 1.03 mol Mg

Moles of HCl = 20 g× 1mol/36.46 g

Moles of HCl = 0.549 mol HCl

Step 3. Identify the limiting reactant

Calculate the moles of H₂ we can obtain from each reactant.

From Mg:

The molar ratio is 1 mol H₂:1 mol Mg

Moles of H₂ = 1.03 mol Mg × 1mol H₂/1 mol Mg

Moles of H₂ = 1.03 mol H₂

From HCl:

The molar ratio is 1 mol H₂:2 mol HCl

Moles of H₂ = 0.549 mol HCl × 1 mol H₂/2 mol HCl

Moles of H₂ = 0.274 mol H₂

The limiting reactant is HCl because it gives the smaller amount of H₂.

The excess reactant is Mg.

2) Calculate the mass of Mg remaining

Step 1. Calculate the moles of Mg reacted

The molar ratio is 1 mol Mg: 2 mol HCl

Moles of Mg reacted = 0.549 mol HCl × 1 mol Mg/2 mol HCl

Moles of Mg reacted = 0.274 mol Mg

Step 2. Calculate the mass of Mg reacted

Mass of Mg reacted = 0.274 mol Mg × 24.30 g Mg/1 mol Mg

Mass of Mg reacted = 6.66 g Mg

Step 3. Calculate the mass of Mg remaining

Mass remaining = original mass – mass reacted

Mass remaining = (25 – 6.66) g Mg

Mass remaining = 18 g Mg

6 0

4 years ago

When water is heated to transform from a liquid to a gas

miskamm [114]

Answer:

evaporation

Explanation:

When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. Heat from the sun, or solar energy, powers the evaporation process.

8 0

3 years ago

Hydrogen and chlorine gases react to form HCl. You and a friend are on opposite sides of a long hallway, you with H2 and your fr

natali 33 [55]

Answer: It is true that Your friend should release the $Cl_{2}$ first.

Explanation:

The velocity of particles of a gas is inversely proportional to the mass of gas. This means that more is the mass of gas less will be its velocity.

Or, more will be the mass of gas more slowly it will move from one place to another.

The molar mass of chlorine gas is more than the molar mass of hydrogen gas. Therefore, chlorine gas will move slowly.

So, your friend should release the $Cl_{2}$ gas first and then according to the length of room you should release the $H_{2}$ gas.

Thus, we can conclude that it is true that Your friend should release the $Cl_{2}$ first.

4 0

3 years ago

From the list below, which items describe beta decay? Check all that apply. APEX

Troyanec [42]

Answer:

C. A neutron turns into a proton

D. An electron is ejected from the nucleus

Explanation:

Beta decay is a type of the three major types of decays, others being alpha decay and gamma decay.
During a beta decay the atomic number of an atom increases by one while the mass number remains the same.
Beta decay may be classified as; an electron emission, positron emission and electron capture.
During electron emission an energetic electron is emitted from the nucleus, together with an antineutrino and a neutron in the nucleus turns into a proton.

8 0

3 years ago

How might the oceans on early earth have formed?

baherus [9]

Gradual leakage of water stored in hydrate minerals of Earth's rocks could have formed a portion of its water. Water may also have come from volcanism: water vapor in the atmosphere that originated in volcanic eruptions may have condensed to form rain, slowly filling Earth's oceanic basins. So, the answer would be C.

I hope this helped! Good luck :)

3 0

3 years ago

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