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harkovskaia [24]
3 years ago
7

Which characteristic of the elements increases as you move across a period from left to right?

Chemistry
1 answer:
topjm [15]3 years ago
6 0

Answer:

Valence electrons

Explanation:

In a period, the number of valence electrons increases (mostly for light metal/elements) as we move from left to right side

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Rank the following aqueous solutions in order of increasing<br> (c) freezing point;
saveliy_v [14]

0.01 m AgNO_{3} < 0.03 m CuSO_{4}< 0.04 m urea

As molal concentration rises, so does freezing point depression. It can be expressed mathematically as ΔTf = Kfm.

<h3>What is Colligative Properties ?</h3>
  • The concentration of solute particles in a solution, not the composition of the solute, determines a colligative properties .
  • Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure reduction are examples of ligand-like properties.
<h3>What is freezing point depression?</h3>
  • When less of another non-volatile material is added, the temperature at which a substance freezes decreases, a process known as Freezing-point depression.
  • Examples include combining two solids together, such as contaminants in a finely powdered medicine, salt in water, alcohol in water.
  • An significant factor in workplace safety is freezing points.
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Learn moree about Colligative Properties here:

brainly.com/question/10323760

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5 0
2 years ago
Consider the following equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover.
solong [7]

Answer:

a) 4869 kj will be released

b) 43.86 g of octane

Explanation:

The heat of combustion is the amount of heat released when one mole of a substance reacts with enough oxygen

since the heat of combustion is per mol of combustible substancewjat we are required to do in this problem is calculate number moles in the reactions although in a different manner

a) MW C3H6O = 158 g/ mol

mol C3H6O = 158 g × 1 mol/ 58.08 g

= 2.72 - 1790 kj / mol ×2.72 mol = 4869 kj

b) Here we are asked the mass of octane to produce 1950 kj of heat knowing that per mole of octane we get 5074.1 kj then

1 mol / 5074.1kj × 1950 kj= 0.384 mol

mass C8H18 = 0.384 mol × 114.23 g/ mol = 43.86 g

4 0
3 years ago
Read 2 more answers
How many oxygen atoms are in 5 grams of cupric sulfate pentahydrate.
Montano1993 [528]

Answer: 3 oxygen atoms!

Explanation: Let me know if I'm wrong, if not I'm happy to help!

8 0
2 years ago
Determine the number of Nitrogen atoms present in 4.00 moles of N2O5
DochEvi [55]
Multiply this number by avogadro's number- 6.02 times 10^23
8 0
4 years ago
Atoms of the LEAST reactive elements tend to have A. one or seven valence electrons. B. eight valence electrons. C. four or five
Tomtit [17]
B. eight valence electrons.
3 0
3 years ago
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