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3 years ago

On average, how many hours of sleep do teenagers need each night? 7 hours 7.5 hours 8 hours 8.5 hours

Chemistry

2 answers:

Marrrta [24]3 years ago

5 0

Answer:

8 to 8.5 since that is the recommended and people usualy sleep more than that

Vera_Pavlovna [14]3 years ago

3 0

Answer:

7.5

Explanation:

i listened to the other dude and got it wrong but it showed this answer to be correct

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The second part of the lab procedure focused on

earnstyle [38]

No you are not done you have to actually add and subtract the numbers

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2 years ago

Is adding hydrochloric acid to milk a physical or chemical change?

maria [59]

Answer: operating machines they are easy to handle

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3 years ago

1. How many metals, nonmetals and metalloids are there in the periodic table?

sweet-ann [11.9K]

Answer:

There are 110 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids..

Explanation:

Hope it helps you..

Y-your welcome in advance..

(;ŏ﹏ŏ)(ㆁωㆁ)

8 0

3 years ago

A student observes that a patch of grass in a garden can reproduce without seed formation by using the structures that grow hori

liraira [26]

RUNNERS , well that what i would pick

3 0

3 years ago

What are the spectator ions in this equation?

dangina [55]

The given question is incomplete. The complete question is :

What is the net ionic equation for the following reaction?

$H_2CrO_4+Ba(OH)_2$

Answer : The spectator ions are $Ba^{2+}$ and $CrO_4^{2-}$

Explanation:

Neutralization is a chemical reaction in which an acid and a base reacts to form salt and water.

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

$2H^+(aq)+CrO_4^{2-}(aq)+Ba^{2+}(aq)+2OH^-(aq)\rightarrow Ba^{2+}(aq)++CrO_4^{2-}(aq)+H_2O(l)$

The ions which are present on both the sides of the equation are barium and chromate ions. and hence are not involved in net ionic equation.

Hence, the net ionic equation is $H^++OH^-\rightarrow H_2O$

6 0

3 years ago