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SCORPION-xisa [38]
2 years ago
9

Safe practices that Gene should observe are listed below. Place the numbers 1 through 4 next to the steps below to indicate the

proper order in which Gene should carry out the steps.
Use heat-resistant gloves or tongs to swirl the flask.

Put on safety goggles and an apron.

Check the flask for chips and cracks.

Read the entire lab procedure through and make sure it is understandable.
Chemistry
2 answers:
Dmitry [639]2 years ago
7 0
1, Read the entire lab procedure through and make sure it is understandable.   2, Put on safety goggles and an apron.  3, Check the flask for chips and cracks.   4, <span>  Use heat-resistant gloves or tongs to swirl the flask.</span>
Nataly [62]2 years ago
6 0

Explanation:

While performing in a laboratory, it is advisable to go through the instructions listed or told by your mentor so that any kind of mishappening.

Also, we should wear lab coat and safety gloves to avoid any kind of chemical contact with our skin. Tongs must be used while heating a test tube or flask.

Therefore, proper order of steps that should be followed by Gene are as follows.

1). Read the entire lab procedure through and make sure it is understandable.

2). Put on safety goggles and an apron.

3). Check the flask for chips and cracks.

4). Use heat-resistant gloves or tongs to swirl the flask.

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Which of the following statements concerning a metal crystallized in a face-centered cubic cell is/are CORRECT? 1. One metal ato
AleksAgata [21]

Answer:

Only 3 is correct.

Explanation:

The crystal of a metal or an ionic compound is called a cell, and there are 7 types of unit cells: cubic, tetragonal, orthorhombic, monoclinic, hexagonal, rhombohedral, and triclinic.

In a face-centered cubic cell (FCC) all angles are 90º and all lengths are equal. Each cubic cell has 8 atoms in each corner of the cube, and that atom is shared with 8 neighboring cells. So for a metal crystal, the atom is located at each of the eight lattice points, where it is shared equally between eight unit cells.

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2 years ago
Unknown element x has four energy levels, five valence electrons, and is a metalloid. what is elements x?
kykrilka [37]

Answer:

Element X is Arsenic (As)

Explanation:

  • Elements in the periodic table are either metals, non-metals or metalloids.
  • Metals are elements that react by losing electrons to obtain a stable configuration and form cation.
  • Non-metals are those elements that react by gaining electrons to form a stable configuration and form anion.
  • Metalloids are elements in the periodic table that have both metallic and non-metallic properties.
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2 years ago
Joelle is a manager at a construction company, and she is interested in the chemistry behind the materials they use. She has beg
vesna_86 [32]

Answer:

The correct answer is - C27H36N2O10.

Explanation:

C27H36N2O10 is the chemical formula of polyurethane foam which is a linear polymer manufactured by reacting polyols and diisocyanates​. Polyurethane foam is used as a thermal insulator.

It used as filling material for various walls such as partition walls inside your house, determines the maintenance of proper insulation. It is not an acidic material that will dissolve easily. It is used not just as wall-filling material but also for sealer and filling in furniture and carpets.

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<h3><u>Answer;</u></h3>

C) primary cell wall → plasma membrane → cytoplasm → vacuole

<h3><u>Explanation;</u></h3>
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  • Cell membrane acts as a semi-permeable barrier separating the inside of the cell from the outside of the cell. The membrane allows regulation of what enters/exits the cell and how quickly.
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4 0
2 years ago
In order to reduce the exposure to organic solvents like turpentine, some art instructors recommend the students clean brushes a
kykrilka [37]
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To apply this to the current problem, we are told that the brushes are being cleaned with vegetable oil or mineral oil. In this case, the oils are used as solvents. In order for these solvents to be effective, the compounds they are trying to dissolve must be similar in structure and properties to other oils. Therefore, vegetable oil or mineral oil will be most effective in removing oil-based paints, as these will have the similar properties needed to dissolve in the oil solvents.
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2 years ago
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