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4 years ago

Convert 320 lbs to g Determine the conversion factors (2.20 lb = 1 kg and 1 kg = 1,000g )

Chemistry

1 answer:

Flauer [41]4 years ago

7 0

Answer:

who know

Explanation:

In the North, ______ were used to keep black and white people apart.

A Social customs incorrect answer

B State laws incorrect answer

C Federal laws incorrect answer

D Court orders

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Which characteristic of water helps it form strong bonds with other water molecules?

Solnce55 [7]

Answer:

The correct answer is Polar structure. See the explanation below, please.

Explanation:

The water molecule is formed by the union of an oxygen atom (O) to two hydrogen atoms (H), forming at an angle of 105 °, having the negative electron density over the O and positive over the H. The water due to its polarity can interact with other equal molecules, by hydrogen bridge (occurs between the atom of H and an electronegative element, in this case the O). It corresponds to a type of dipole-dipole interaction.

8 0

3 years ago

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

Lewis atomic model proposed that electrons were arranged around the nucleus in what

k0ka [10]

Lewis had proposed that the valence electrons of any substance were arranged around its atoms in a cubic configuration. Later on, this was modified when it was learned that the electrons actually orbit the nucleus, similar to the planets orbiting the sun. Moreover, it is now deduced that the electrons are found in regions, known as electron clouds, and their specific, discrete location at a given point in time can not be determined.

7 0

3 years ago

What does it mean if an experiment is replicable ? Why is it important that experiment be replicable

Murljashka [212]

Answer:

When an experiment is replicanle it means it is able to be done again.

Explanation:

It is important because You need to see if you get different results or if you messed up the first time

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3 years ago

What provides the energy to set the water cycle in motion?

romanna [79]

Where is the question

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3 years ago