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IgorC [24]
3 years ago
6

3.8 (g) ÷ 6.28 (cm3) = density​

Chemistry
1 answer:
igor_vitrenko [27]3 years ago
4 0

Answer:

The density is 0, 61 g/cm3

Explanation:

We calculate the density:

Density= mass/volume = 3,8 g/6, 28 cm3 = 0, 61 g/cm3

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Which of the following statements is NOT true?
maria [59]

Answer : The incorrect statements are:

(A) When two nonmetals react, the compound formed is ionic.

(B) Two nonmetals can undergo an oxidation-reduction reaction.

Explanation :

Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.

The covalent compound are usually formed when two non-metals react.

The two nonmetals can not undergo an oxidation-reduction reaction.

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

Ionic compound are usually formed when a metal reacts with a non-metal.

The metal-nonmetal reaction can always be assumed to be an oxidation-reduction reaction.

For example : 2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)

In this reaction, sodium shows oxidation because the oxidation state changes from (0) to (+1) and and chlorine shows reduction because the oxidation state changes from (0) to (-1).

Hence, the incorrect statements are, (A) and (B)

8 0
4 years ago
How to Convert 0.75g of nitrogen gas (N2) to liters.
Stells [14]

24

N2=22.4 liters

18g=22.4 litters

18÷.75=24

6 0
3 years ago
Iron is extracted from fe 2o 3 by a reaction with carbon (c) at very high temperature. if you take 2.86 x 10 4 g of fe 2o 3 to r
umka21 [38]
Balanced equation:
2 Fe₂O₃ + 3 C → 4 Fe + 3 CO₂
number of moles of Fe₂O₃ = weight (g) / molar mass = (2.86 x 10⁴ g) / 159.69 g/mol = 179 moles
number of moles of C = (9.05 x 10³) / 12 = 754.16 moles
2 moles of Fe₂O₃ reacts with 3 moles of C
so 179 moles of Fe₂O₃ need 268.5 moles of C only
so carbon present in excess (754.16) and Fe₂O₃ is the limiting reactant so the number of moles used from Fe₂O₃ will be all the 179 moles
6 0
3 years ago
Read 2 more answers
What is the density of an object with a mass of 145.8g and an volume of 91.75 mL?
Over [174]

Answer:

<h2>Density = 1.6 g/mL</h2>

Explanation:

Density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 145.8 g

volume = 91.75 mL

Substitute the values into the above formula and solve for the Density

That's

Density =  \frac{145.8}{91.75}

= 1.5891

We have the final answer as

Density = 1.6 g/mL

Hope this helps you

4 0
3 years ago
using the periodic table shown here please answer the following questions about S. 1.what element does the symbol S stand for? 2
Contact [7]

1) It stands for sulfur

2) 16

3)It stands for the number of protons

4)Chalcogen


8 0
3 years ago
Read 2 more answers
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