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3 years ago

Why was Niels Bohr’s atomic model superior to all the earlier models?

Chemistry

1 answer:

sergeinik [125]3 years ago

7 0

Answer:

Explanation:

The Niels Bohr's atomic model superior to all the earlier models is because it showed how the electron could orbit the nucleus without falling into it

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Assume that a daily diet of 2000 calories (i.e. 8.37 x 106 J) is converted completely to body heat.

slava [35]

Answer:

(a) the mass of the water is 3704 g

(b) the mass of the water is 199, 285.7 g

Explanation:

Given;

Quantity of heat, H= 8.37 x 10⁶ J

Part (a) mass of water (as sweat) need to evaporate to cool that person off

Latent heat of vaporization of water, Lvap. = 2.26 x 10⁶ J/kg

H = m x Lvap.

$m = \frac{H}{L._{vap}} =\frac{8.37 * 10^6.J}{2.26*10^6\ \frac{J}{kg}} = 3.704 \ kg$

mass in gram ⇒ 3.704 kg x 1000g = 3704 g

Part (b) quantity of water raised from 25.0 °C to 35.0 °C by 8.37 x 10⁶ J

specific heat capacity of water, C, 4200 J/kg.°C

H = mcΔθ

where;

Δθ is the change in temperature = 35 - 25 = 10°C

$m =\frac{H}{c* \delta \theta} = \frac{8.37 *10^6}{4200*10} = 199.2857 kg$

mass in gram ⇒ 199.2857 kg x 1000 g = 199285.7 g

5 0

3 years ago

Elements in Group 4A

steposvetlana [31]

Answer:

helium hydrogen

Explanation:

lithium beryllium bottom carbon

6 0

3 years ago

Humans have used rocks in the creation of tools and building materials true or flase

Anuta_ua [19.1K]

True, if you would like an example look at Indian arrow heads or early architecture all use rocks.

4 0

3 years ago

Read 2 more answers

Tooth enamel is chemically known as

Vladimir [108]

Answer:

Hey!

Your answer is Calcium Phosphate!

Explanation:

It is the substance/mineral that is mostly found in our teeth and bones!

HOPE THIS HELPS!!

7 0

3 years ago

Group 17 is called the halogen family, and the group to its right is called the noble gases. How are the elements in these group

Firlakuza [10]

Answer: they all have 7 electrons they have different atom sizes

Explanation: hope it helps

7 0

3 years ago