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3 years ago

Describe what you would do if a glass beaker drops and breaks. List the appropriate steps in order.

Chemistry

2 answers:

MA_775_DIABLO [31]3 years ago

8 0

1. Leave everything alone and don't touch the glass .
2. Tell a Teacher .
3. And that's it .

GrogVix [38]3 years ago

6 0

Answer:

Wear gloves that will protect your hands from cuts
Use a broom and dustpan to collect the broken beaker
Dispose it in the disposable container allocated for broken/sharp objects
Alert the lab instructor about the incident.

Explanation:

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How many milligrams of magnesium reacts with excess HCl to produce 31.2 mL of hydrogen gas at 754 Torr and 25.0℃.

Ivanshal [37]

Answer:

There will react 30.9 milligrams of magnesium

Explanation:

Step 1: Data given

Volume of hydrogen = 31.2 mL

Pressure = 754 torr = 754/760 = 0.992 atm

Temperature = 25.0 °C = 298 Kelvin

Step 2: The balanced equation

Mg + 2HCl → MgCl2 + H2

Step 3: Calculate moles of H2

p*V = n*R*T

⇒ with p = the pressure of H2 = 0.992 atm

⇒with V = the volume of H2 = 31.2 mL = 0.0312 L

⇒ with n = the moles of H2 = TO BE DETERMINED

⇒ with R = the gas constant = 0.08206 L*atm/K*mol

⇒ with T= the temperature = 25.0 °C = 298 Kelvin

n = (p*V)/(R*T)

n = (0.992*0.0312)/(0.08206*298)

n = 0.00127 moles

Step 4: Calculate moles of Mg

For 1 mol of Mg we need 2 moles of HCl to produce 1 mol of MgCl2 and 1 mol of H2

For 0.00127 moles of H2 we need 0.00127 moles of Mg

Step 5: Calculate mass of Mg

Mass of Mg = moles of Mg * molar mass of Mg

Mass of Mg = 0.00127 moles * 24.3 g/mol

Mass of Mg = 0.0309 grams = 30.9 mg of Mg

There will react 30.9 milligrams of magnesium

3 0

3 years ago

A river carries pieces of granite from a mountain to the sea.

Inessa [10]

Answer:

The Granite is eroded, weathered, and is being transported away. The Granite will then be deposited into a lake or a sea. This could also go to help form a new sedimentary rock.

Explanation:

5 0

2 years ago

In the context of small molecules with similar molar masses, arrange these intermolecular forces by strength (hydrogen bonding -

Katarina [22]

<h2>Answer:</h2>

Arrangement of inter molecular forces from strongest to weakest.

Hydrogen bonding
Dipole-dipole interactions
London dispersion forces.

<h3>Explanation:</h3>

Intermolecular forces are defined as the attractive forces between two molecules due to some polar sides of molecules. They can be between nonpolar molecules.

Hydrogen bonding is a type of dipole dipole interaction between the positive charge hydrogen ion and the slightly negative pole of a molecule. For example H---O bonding between water molecules.

Dipole dipole interactions are also attractive interactions between the slightly positive head of one molecule and the negative pole of other molecules.

But they are weaker than hydrogen bonding.

London dispersion forces are temporary interactions caused due to electronic dispersion in atoms of two molecules placed together. They are usually in nonpolar molecules like F2, I2. they are weakest interactions.

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3 years ago

What is a diatom?

mezya [45]

Answer:

a molecule with two of the same element

Explanation:

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2 years ago

Uv gel enhancements rely on ingredients from the monomer liquid and ________ chemical family.

pishuonlain [190]

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3 years ago