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nikdorinn [45]
3 years ago
8

What is the mass of 7 moles of Nitrogen?

Chemistry
1 answer:
Igoryamba3 years ago
8 0

Hey there!

Molar mass of nitrogen is 14.007 g.

We have 7 moles.

Multiply 7 by 14.007.

7 x 14.007 = 98.049

7 moles of nitrogen has a mass of 98.049 grams.

Hope this helps!

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Plesse help asap!!!​
Naily [24]

Answer:

4.4×10² cm³

Explanation:

From the question given above, the following data were obtained:

Diameter (d) = 68.3 mm

Height (h) = 0.120 m

Volume (V) =?

Next, we shall convert the diameter (i.e 68.3 mm) to cm.

This can be obtained as follow:

10 mm = 1 cm

Therefore

68.3 mm = 68.3 mm / 10 mm × 1 cm

68.3 mm = 6.83 cm

Therefore, the diameter 68.3 mm is equivalent 6.83 cm.

Next, we shall convert the height (i.e 0.120 m) to cm. This can be obtained as follow:

1 m = 100 cm

Therefore,

0.120 m = 0.120 m/ 1 m × 100 cm

0.120 m = 12 cm

Therefore, the height 0.120 m is equivalent 12 cm.

Next, we shall determine the radius of the cylinder. This can be obtained as follow:

Radius (r) is simply half of a diameter i.e

Radius (r) = Diameter (d) /2

r = d/2

Diameter (d) = 6.83 cm

Radius (r) =?

r = d/2

r = 6.83/2

r = 3.415 cm

Finally, we shall determine the volume of the cylinder as follow:

Radius (r) = 3.415 cm

Height (h) = 12 cm

Volume (V) =?

Pi (π) = 3.14

V = πr²h

V = 3.14 × (3.415) ² × 12

V = 440 cm³

V = 4.4×10² cm³

Therefore, the volume of the cylinder is 4.4×10² cm³

8 0
3 years ago
Which example illustrates a chemical change
Svetllana [295]
Burning wood because heat indicates a chemical change
7 0
3 years ago
Read 2 more answers
Read each statement regarding food and beverages in the lab and determine if each is true or false.
Scrat [10]

Answer:

1. True

2. False

3. False

4. True

Explanation:

A lab is an abbreviation for laboratory and it can be defined as a building that is equipped with scientific equipments and apparatus, which are used for performing scientific experiments, manufacturing of chemicals and drugs, research, testing and analysis of hypothesis in order to establish a theory.

Generally, laboratory scientists, technicians, students and anyone going into a laboratory is prohibited from taking in edible items such as food and water.

Basically, all laboratories are required to place a visible warning sign around the lab prohibiting the bringing in and ingestion of food in any form.

1. True: Tobacco products of all kinds are prohibited in lab.

2. False: Beverages are allowed in lab as long as they are in containers with lids. It's completely prohibited from the lab so as to prevent food poisoning.

3. False: Chewing gum is okay in the lab as long as you don't blow bubbles.

4. True: Food items should not be brought into the lab.

6 0
3 years ago
Phosphorus oxychloride has the chemical formula POCl3, with P as the central atom. In order to minimize formal charge, how many
Elina [12.6K]

Answer:

Phosphorus makes 5 bonds with other atoms

Explanation:

POCl_{3} has total 32 number of valence electrons (P has 5 , O has 6 and Cl has 7 valence electrons).

These valence electrons are used to draw Lewis structure of POCl_{3}.

Formal charge on an atom = (no. of valence electrons of the atom)-(no. of covalent bonds attached to the atom)-(no. of electrons in lone pair of the atom)

Applying octet rule (atoms have eight electrons in their valence shell) and minimizing formal charge of POCl_{3}, it has been found that P makes total 5 bonds with rest of the atoms.

Lewis structure of POCl_{3} along with formal charge (in parentheses) has been given below.

6 0
3 years ago
What Group is this element in?<br> Please answer (^∇^)
Aneli [31]
Group 2 because the outer electrons ( also known as valence electrons) are 2 and that’s how we know which group it is in
5 0
3 years ago
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