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3 years ago

If an atom has 1 to 3 valence electrons, what will it do?

Chemistry

1 answer:

motikmotik3 years ago

3 0

Answer:

$\boxed{\text{donate electrons}}$

Explanation:

An atom with one to three valence electrons would have to gain seven to five valence electrons, respectively to get a stable octet.

It is easier for it to donate electrons and expose the stable octet of electrons in the shell below..

(A) is wrong. You can't move electrons to a lower shell, because it's already full.

(B) is wrong. The atom will donate electrons.

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A sucrose solution is prepared to a final concentration of 0.210 MM . Convert this value into terms of g/Lg/L, molality, and mas

vova2212 [387]

Answer:

1) 71.9 g/L

2) 0.221 m olal

3) 7.05% by mass

Explanation:

Step 1: Data given

Concentration of sucrose = 0.210 M

Molar weight of sucrose = 342.3 g/mol

Density of solution = 1.02 g/mL

Mass of water = 948.1 grams

Step 2: Convert this value into terms of g/L

(0.210 mol/L) * (342.3 g/mol) = 71.9 g/L

Calculate the molality

Step 1: Calculate mass water

Suppose we have a volume of 1.00L

Mass of the solution = 1000 mL * 1.02 g/mL = 1020 g solution

We know that there are 71.9 g of solute in a liter of solution from the first calculation. This means

(1020 grams solution) - (71.9 g solute) = 948.1 g = 0.9481 kg water

Step 2: Calculate molality

Molality = moles sucrose / mass water

(0.210 mol) / (0.9481 kg) = 0.221 mol/kg = 0.221 m olal

Mass %

% MAss = (mass solute / mass solution)*100%

(71.9 g) / (1020 g) *100% = 7.05% by mass

4 0

4 years ago

A large weather balloon requires plenty of helium gas in order to ascend into the atmosphere to take measurements. If the balloo

timama [110]

To be able to calculate the number of moles for this problem, for simplicity, we assume that it is an ideal gas. We use the equation PV = nRT. We do as follows:

PV = nRT
n = PV / RT
n = 1(100000) / 0.08206 (27 + 273.15)
n = 4060.04 mol

8 0

4 years ago

Read 2 more answers

What led Marie Curie to draw the following conclusions? (b) A highly radioactive element, aside from uranium, occurs in pitchble

AVprozaik [17]

Making repeated separations of the various substances in the pitchblende, Marie and Pierre used the Curie electrometer to identify the most radioactive fractions. They thus discovered that two fractions, one containing mostly bismuth and the other containing mostly barium, were strongly radioactive.

<h3>What was surprising about pitchblende?</h3>

Since it was no longer appropriate to call them “uranic rays,” Marie proposed a new name: “radioactivity.”

Even more surprising, Marie next found that a uranium ore called pitchblende contained two powerfully radioactive new elements: polonium, which she named for her native Poland, and radium.

<h3>Why is radium more radioactive than uranium?</h3>

It is 2.7 million times more radioactive than the same molar amount of natural uranium (mostly uranium-238), due to its proportionally shorter half-life.

Learn more about highly radioactive elements here:

<h3>brainly.com/question/10257016</h3><h3 /><h3>#SPJ4</h3>

6 0

2 years ago

How many atoms are there in total in a molecule of sulfur trioxide SO3??

MAXImum [283]

Answer:

I got 1.14 mol So3 as the answer

hopefully if this could help

7 0

3 years ago

Use the information for the isotopes of element X to calculate the average atomic mass of X, and identify the element. Isotope A

BigorU [14]

Answer

36.45 u; X = Cl

Explanation:

The atomic mass of X is the <em>weighted averag</em>e of the atomic masses of its isotopes.

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent of the total).

Set up a table for easy calculation .

0.7577 × 34.969 u = 26.496 u

0.2423 × 36.965 u = <u> 8.9566 u </u>

TOTAL = 36.45 u

X = Cl

5 0

4 years ago

Read 2 more answers