3 years ago

Science- what do you notice

1 answer:

5 0

Answer:

Definition of science: the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

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Formula for salt I will mark u brain list

Vesnalui [34]

Answer:

The formula for salt is NaCl or Sodium chloride

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3 years ago

What did antoine lavoisier discover about air

dedylja [7]

Answer:

He is most well known for discovering the role Oxygen plays in combustion

Explanation:

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4 years ago

The sodium atom loses an electron to form a sodium Ion (Na+). Which statement is correct with respect to its atomic radius?

SCORPION-xisa [38]

Answer:

sodium ion has smaller radius than a atom.

Explanation:

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3 years ago

5. A 5.00 g sample of an unknown substance was heated from 25.2 C to 55.1 degrees * C , and it required 133 to do so. Identify t

Leviafan [203]

Answer:

Aluminum

Explanation:

Given

$T_1 = 25.2^oC$

$T_2 = 55.1^oC$

$m = 5.00g$

$\triangle Q= 133J$

See attachment for chart

Required

Identify the unknown substance

To do this, we simply calculate the specific heat capacity from the given parameters using:

$c = \frac{\triangle Q}{m\triangle T}$

This gives:

$c = \frac{\triangle Q}{m(T_2 - T_1)}$

So, we have:

$c = \frac{133J}{5.00g * (55.1C - 25.2C)}$

$c = \frac{133J}{5.00g * 29.9C}$

$c = \frac{133J}{149.5gC}$

$c = 0.89\ J/gC$

From the attached chart, we have:

$Al(s) = 0.89\ J/gC$ --- The specific heat capacity of Aluminum

Hence, the unknown substance is Aluminum

7 0

3 years ago

A student studies photosynthesis and cellular respiration in plants. Which of the following reactions would produce 12 grams (g)

spayn [35]

Answer:

The answer is A

Explanation:

Because I used the elimination rule none of the other ones could be an answer.

6 0

3 years ago

Science- what do you notice​

Science- what do you notice