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4 years ago

I will give brainlyest Explain why science is a continuous progression of study.

Chemistry

1 answer:

Likurg_2 [28]4 years ago

8 0

It’s because new discoveries are made all the time sometimes what was considered right may be found out to be wrong

You might be interested in

What would be the freezing point of a 1.7 mole aqueous ethylene glycol solution? The freezing point depression constant for wate

nata0808 [166]

Answer:

$-3.2^oC$

Explanation:

In order to answer this question, we need to be familiar with the law of freezing point depression. The law generally states that mixing our solvent with some particular solute would decrease the freezing point of the solvent.

This may be expressed by the following relationship:

$\Delta T_f=iK_fb$

Here:

$\Delta T_f=T_{initial}-T_{final}$ is the change in the freezing point of the solvent given its initial and final freezing point temperature values;

$i$ is the van 't Hoff factor (i = 1 for non-electrolyte solutes and i depends on the number of moles of ions released per mole of ionic salt);

$K_f$ is the freezing point depression constant for the solvent;

$b=\frac{n_{solute}}{m_{solvent}}$ is molality of the solute, defined as a ratio between the moles of solute and the mass of solvent (in kilograms).

We're assuming that you meant 1.7-molal solution, then:

$b=1.7 m$

Given ethylene glycol, an organic non-electrolyte solute:

$i=1$

The freezing point depression constant:

$K_f=1.86^oC/m$

Initial freezing point of pure water:

$T_{initial}=0.00^oC$

Rearrange the equation for the final freezing point and substitute the variables:

$T_f=T_o-iK_fb=0.00^oC-1\cdot1.86^oC/m\cdot1.7 m=-3.16^oC$

8 0

3 years ago

What is the percent by weight (w/w%) of sugar in soda? Assume the average mass of sugar in soda is 23.0 g and the total mass is

Nina [5.8K]

The percent by weight (w/w%) of sugar in soda : 6.216%

<h3>Further explanation</h3>

Given

mass of sugar = 23 g

total mass = 370 g

Required

the percent weight

Solution

%weight = (mass of solute : mass of solution) x 100%

solute = sugar

solution = solvent + solute = water + sugar

percent weight of sugar in soda :

= (23 : 370) x 100%

= 6.216 %

7 0

3 years ago

In 1808, John Dalton proposed a series of statements regarding the atom that became known as Dalton's postulates or Dalton's ato

Oduvanchick [21]

Answer:

The all 4 the given statements are part of Dalton's atomic theory.

Explanation:

Dalton's postulates or Dalton's atomic theory:

Matter is made up of small particles termed as atom.
Atoms are indivisible particle.
Atoms of different element have different masses and properties.
Atoms of the same element have the identical size, mass, and structure.
During chemical reaction, rearrangement of atoms takes place.
Atoms of different different combines together to form new compounds in simple whole number ratio.

6 0

3 years ago

Which best describes sodium chloride (NaCl)?

OverLord2011 [107]

Answer: NaCl is an ionic compound

Explanation: Sodium Chloride is formed from Na+ and Cl- ions.

It is soluble in water, it has crystalline structure, it has high melting point and

It is insulator as solid form. Water solution leads current.

4 0

3 years ago

How and why do we see colors?

vladimir1956 [14]

Answer:

Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

7 0

3 years ago