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tiny-mole [99]
3 years ago
11

In this illustration, which group highlights, or which groups highlight, nonmetals?

Chemistry
2 answers:
vesna_86 [32]3 years ago
6 0

Answer:

Groups B and D

Explanation:

The attached picture is that of the periodic table of elements. There are four colours showing different classes of the elements. The colours are coded A,B,C and D

A are metals (alkali metals, alkali earth metals, transition metals, actinides and lanthanides)

B and D are non-metals (halogens and gases including noble gases)

C are metalloids or semi-metals (they have some properties similar to metals and non-metals)

B and D is the answer because elements found in those colours have properties different from that of metals

Step2247 [10]3 years ago
5 0

Answer:

I'm pretty sure it's B and D

Explanation:

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Find the mass in grams of 2.65 x 10^24 molecules of cl2
Alina [70]
Moles of Cl2 = 2.65 x 10^24 / 6.02 x 10^23 = 4.4 moles.

Mass of Cl2 in grams = molar mass of Cl2 x moles of Cl2
                                     = 70.906 x 4.4
                                     = 311.98 grams.

Hope this helps!
8 0
4 years ago
Both the freezing temperature and the melting temperature of water are the same(0°C). Explain why a substance like water freezes
Ahat [919]
It is approximately 0. It could be barley higher or lower for both. You have to take the altitude into consideration. 
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4 years ago
What mass of magnesium hydroxide is required to create a 441 mL solution with a pH of 12.52?
marshall27 [118]

Answer:

0.423g

Explanation:

akording to mass = concetration x volume

4 0
3 years ago
one bottle of aspirin holds 250 tablets, each containing 150 mg of aspirin and sells for $2.95. Another bottle holds 125 tablets
AlladinOne [14]
I bottle:

250 * 150mg = 37500mg

If 37500mg ------- cost ------- <span> $2.95
so 1mg       ------- cost ------- x

x = 1mg*</span> $2.95 / 37500mg =  $7,87*10⁻⁵ 

II bottle

125 * 200mg = 25000mg

If 25000mg ---------- cost ---------- <span>$3.50
so 1mg       ---------- cost ---------- x

x = 1mg* </span>$3.50 / 25000mg = $0,00014=$1,4*10⁻⁴


$7,87*10⁻⁵  < $1,4*10<span>⁻⁴
</span>
1st bottle is better bargain cause 1mg of aspirin its cheaper than in 2nd.
7 0
3 years ago
Calculate the mass of magnesium carbonate ( MgCO3), in grams, required to produce 110.0 g of carbon dioxide using the following
bearhunter [10]

Answer:

210.7~g~MgCO_3

Explanation:

We have to start with the <u>reaction</u>:

MgCO_3~->~MgO~+~CO_2

We have the same amount of atoms on both sides, so, we can continue. The next step is to find the <u>number of moles</u> that we have in the 110.0 g of carbon dioxide, to this, we have to know the <u>atomic mass of each atom</u>:

C: 12 g/mol

O: 16 g/mol

Mg: 23.3 g/mol

If we take into account the number of atoms in the formula, we can calculate the <u>molar mass</u> of carbon dioxide:

(12*1)+(16*2)=44~g/mol

In other words: 1~mol~CO_2=~44~g~CO_2. With this in mind, we can calculate the moles:

110~g~CO_2\frac{1~mol~CO_2}{44~g~CO_2}=25~mol~CO_2

Now, the <u>molar ratio</u> between carbon dioxide and magnesium carbonate is 1:1, so:

2.5~mol~CO_2=2.5~mol~MgCO_3

With the molar mass of MgCO_3 ((23.3*1)+(12*1)+(16*3)=84.3~g/mol. With this in mind, we can calculate the <u>grams of magnesium carbonate</u>:

2.5~mol~MgCO_3\frac{84.3~g~MgCO_3}{1~mol~MgCO_3}=210.7~g~MgCO_3

I hope it helps!

8 0
3 years ago
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