All categories

3 years ago

Which elements are part of the halogens group?

Chemistry

1 answer:

larisa [96]3 years ago

5 0

The correct answer is Cl, Br, and F. They are all in the halogens group.

You might be interested in

key A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration o

lorasvet [3.4K]

Answer:

2.41065 grams

Explanation:

Here we have to apply molarity, particularly in reference to the equation molarity = moles of solute / volume. I would like to rewrite this formula, but with respect to the units - grams = moles / Liters,

We can use molarity to determine the number of moles. After doing so, we can determine the mass of the solute with respect to the formula moles = mass / molar mass. The molar mass of NaCl is 58.44 grams.

_______________________________________________________

275 mL = 0.275 L,

Number of Moles of NaCl = 0.150 * 0.275 = 0.04125 moles,

Mass = 0.04125 * 58.44 = 2.41065 grams,

Solution - Mass of NaCl = 2.41065 grams

Hope that helps!

5 0

3 years ago

Read 2 more answers

A 3.0-mol sample of kclo3 was decomposed according to the equation 2kclo3(s) --> 2kcl(s) + 3o2(g) how many moles of o2 are fo

d1i1m1o1n [39]

2moles of O2 are formed.

5 0

3 years ago

Grade 8 Science

ira [324]

Materials and their properties: compounds like sodium chloride - an interactive educational resource for 11 to 14 year olds. ... Elements are substances (like hydrogen and oxygen) that can't be split into simpler substances. ... For each statement, decide whether it describes a mixture or a compound and check the box.

8 0

3 years ago

When concentrated nitric acid mixed with some concentrated sulfuric acid reacts with benzene at moderate temperature forms------

FrozenT [24]

I will help just send me it

5 0

2 years ago

Three common ores of iron are FeO, Fe2O3, and Fe3O4. Iron ores are often reduced to elemental iron by heating in the presence of

brilliants [131]

Answer:

Answers are explained below

Explanation:

(a)

Oxidation number of iron :

FeO = +2

Fe2O3= +3

Fe3O4 = +2 and +3 since Fe3O4 is the mixture of FeO and Fe2O3.

(b) FeO + CO ----> Fe (s) + CO2

(c) In a pure iron metallic bond is exist between the particles of Fe. But in the form of ore metals forms ionic bond with the non-metals.

Hence the properties vary.

Yes carbon steel has greater strength than that of pure iron but retains the property of iron because no chemical reaction occurs between carbon and iron.

Mixing of carbon in iron is a type of physical change since there is no chemical reactions occur between the carbon and iron. Carbon atoms diffuses in the place between the iron atoms.

(f) One of the property of non-metals are brittleness. It is non ductile .

So when the percentage of carbon increases its atoms also occupying more and more free places.

And increasing the brittleness. So the iron becomes less ductile.

6 0

3 years ago