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3 years ago

The elements in this ROW of the periodic table belong to the same? *

Chemistry

2 answers:

Montano1993 [528]3 years ago

3 0

Answer:

Period

Explanation:

The name of the rows in the periodic table being period.

A column would be called a group/family.

tiny-mole [99]3 years ago

3 0

Answer:

period because it's in a row. A group is a column

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3) Calculate the percent by mass of 3.55 g NaCl dissolved in 88 g water.

kotykmax [81]

Answer:

The percent by mass of 3.55 g NaCl dissolved in 88 g water is 3.88%

Explanation:

When a solute dissolves in a solvent, the mass of the resulting solution is a sum of the mass of the solute and the solvent.

A percentage is a way of expressing a quantity as a fraction of 100. In this case, the percentage by mass of a solution is the number of grams of solute per 100 grams of solution and can be represented mathematically as:

$Percent by mass=\frac{mass of solute}{mass of solution} *100$

In this way it allows to precisely establish the concentration of solutions and express them in terms of percentages.

In this case:

mass of solute: 3.55 g
mass of solution: 3.55 g + 88 g= 91.55 g

Replacing:

$Percentbymass=\frac{3.55}{91.55}*100$

Percent by mass= 3.88%

<u><em>The percent by mass of 3.55 g NaCl dissolved in 88 g water is 3.88%</em></u>

5 0

3 years ago

What does the term hospitality mean to you? Give a definition for hospitality.

antiseptic1488 [7]

Answer:

relating to or denoting the business of entertaining clients, conference delegates, or other official visitors.

3 0

3 years ago

Read 2 more answers

The chemical formula for magnesium oxide is MgO. A chemist determined by measurements that 0.030 moles of magnesium oxide partic

tamaranim1 [39]

Answer:

1.209g of MgO participates

Explanation:

In this problem, we have 0.030 moles of MgO that participates in a particular reaction.

And we are asked to solve for the mass of MgO that participates, that means, we need to convert moles to grams.

To convert moles to grams we need to use molar mass of the compound:

<em>1 atom of Mg has a molar mass of 24.3g/mol</em>

<em>1 atom of O has a molar mass of 16g/mol</em>

<em />

That means molar mass of MgO is 24.3g/mol + 16g/mol = 40.3g/mol

And mass of 0.030 moles of MgO is:

0.030 moles MgO * (40.3g/mol) =

<h3>1.209g of MgO participates</h3>

3 0

3 years ago

The major elements of organic molecules is carbon identify three other carbon is normally bonded to

arsen [322]

Carbon normally bonded to Hydrogen, Nitrogen, Oxygen

4 0

3 years ago

Caclulate the pH for a solution with an [H+] = 9.75 x10-4

vovangra [49]

Answer:

pH=3.01

Explanation:

pH=-log[H+]

=-log(9.74x10e-4)

=3.01

3 0

4 years ago