Ask question

Ask question

All categories

3 years ago

14

What must be part of a quantitative observation?

2 answers:

swat323 years ago

6 0

A quantitative observation must be a measurement of some sort. (Something including numbers). Qualitative, on the other hand, is when you are using words to describe what has happened.

KATRIN_1 [288]3 years ago

4 0

A quantitative observation must be a measurement of some sort. (Something including numbers). Qualitative, on the other hand, is when you are using words to describe what has happened.

Explanation:

Quantitative observations are performed with devices such as rulers, balances, measured cylinders, beakers, and regulators. These results are measurable,using one or more senses to gather knowledge. information that doesn't involve numbers or measures. the process of making an understanding based on observations and previous knowledge. Quantitative investigations always involve numbers.

You might be interested in

N yogurt de 125 g muestra en su etiqueta el contenido de algunas de sus sustancias nutricionales:¿Cuál es la composición en tant

poizon [28]

Answer:

Sustancia Masa (g) Composición (% m/m)

<em>Proteínas</em> 5,5 4,4

<em>Azúcares</em> 5,0 4,0

<em>Sodio </em>0,06 0,048

<em>Potasio </em>0,15 0,12

Explanation:

Para calcular la composición porcentual en masa de las sustancias debemos usar la siguiente ecuación:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100$

En donde:

$m_{s}$ es la masa de la sustancia

$m_{sol}$ es la masa del yogurt = 125 g

Para las proteínas:

$\%_{m/m} = \frac{m_{s}}{m_{sol}} \times 100 = \frac{5,5 g}{125 g} \times 100 = 4,4 \%$

Para los azúcares:

$\%_{m/m} = \frac{5,0 g}{125 g} \times 100 = 4,0 \%$

Para el sodio:

$\%_{m/m} = \frac{0,06 g}{125 g} \times 100 = 0,048 \%$

Para el potasio:

$\%_{m/m} = \frac{0,15 g}{125 g} \times 100 = 0,12 \%$

Espero que te sea de utilidad!

6 0

3 years ago

Is oxygen ionic or molecular

Luba_88 [7]

Answer:

morlecular element is oxygen

7 0

3 years ago

Read 2 more answers

Lina20 [59]

Answer:i think its 6 what do you think

Explanation:

5 0

3 years ago

In which container are the particles of water moving fastest? In which container are the particles moving slowest

Ghella [55]

Answer:

Particles move faster the farther they are apart, so the container with the most spread out particles.

8 0

3 years ago

Calculate the solubility (in g/L) of CaSO 4 ( s ) CaSO4(s) in 0.400 M Na 2 SO 4 ( aq ) at 25 ° C 0.400 M Na2SO4(aq) at 25°C. The

Allushta [10]

Explanation:

Ionization equation for $CaSO_{4}$ is as follows.

$CaSO_{4} \rightarrow Ca^{2+} + SO^{2-}_{4}$

s s s

Now, the expression for the solubility product is as follows.

$K_{sp} = [Ca^{2+}][SO^{2-}_{4}]$

= $s \times s$

= $s^{2}$

As the concentration of $Na_{2}SO_{4}$ is given as 0.4 M.

So, $[Na_{2}SO_{4}] = [SO^{2-}_{4}]$ = 0.4 M

Putting the given values as follows.

$K_{sp} = [Ca^{2+}][SO^{2-}_{4}]$

$4.93 \times 10^{-5} = [Ca^{2+}] \times 0.4$

$[Ca^{2+}]$ = 12.325 \times 10^{-5}[/tex]

Hence, the solubility of $CaSO_{4}$ in $Na_{2}SO_{4}$ is $12.325 \times 10^{-5}$ .

Therefore, solubility of $CaSO_{4}$ in g/ml as follows.

$12.325 \times 10^{-5} \times 136 g/mol$

= 0.0167 g/L

Thus, we can conclude that solubility of $CaSO_{4}$ is 0.0167 g/L.

4 0

3 years ago