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iris [78.8K]
3 years ago
6

Which best describes the purpose of a controlled expierment

Chemistry
1 answer:
Dmitrij [34]3 years ago
8 0

Answer:

is to examine that whether the other variables causes a change in another. The experimental setup of controlled experiments are designed to test the hypotheses. ... It allows to change more than one variable, on the condition that all other variables are controlled.

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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
Solid aluminum hydroxide reacts with a solution of hydrobromic acid. write a balanced molecular equation and a balanced net ioni
Stolb23 [73]
<span>To find the balanced molecular equation, we need to find the symbols for each element and their charges and then balanced the equation. This comes out to: Al(OH)3(aq) + 3HBR(aq) ---> AlBr3(aq) + 3H2O(l) The net ionic equation is adding the charges and separating them into basic components. Al3+ + 3OH- + 3H+ + 3BR- --> Al3+ + 3Br + H3O+ We can cancel out the aluminum and bromine to get: 3OH-(aq) + 3H+(aq) --> 3H2O(l)</span>
4 0
3 years ago
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Which of the following is an example of a model?
Vlad1618 [11]

B-a geographical map

5 0
3 years ago
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Which fossil fuel accounts for 95% of consumption for transportation?
umka21 [38]
The answer is natural gasses
8 0
4 years ago
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The mass of 2.50 moles of calcium fluoride (CaF2) is how many grams ?
emmasim [6.3K]

Answer:

195.199grams

Explanation:

Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.

1 mole of  calcium fluoride has a mass of 40.08+2×18.99984

=78.0797 grams

if one mole has a mass of 78.0797 grams, then 2.5 moles have:

2.5 moles× 78.0797 grams/mole= 195.1992 grams

3 0
4 years ago
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