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Lelechka [254]
4 years ago
11

Valence determines an atoms

Chemistry
1 answer:
Salsk061 [2.6K]4 years ago
6 0

Answer:

false

Explanation:

the atomic number detemines the atom

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How much time will you save on a ten mile trip if u travel at 60mph rather than at 55mph?
elena-14-01-66 [18.8K]

Time = Distance/Rate

for 60 mph

Time = 10 miles/60 mph

= 0.1666 * 60 minutes = 10 minutes

for 55 mph

Time = 10 miles/55 mph

= 0.181818 * 60 minutes = 10.90 minutes

3 0
4 years ago
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If 13.5 L of nitrogen gas reacts with 17.8 L of hydrogen gas at STP, according to the following reaction, what mass of ammonia w
Shalnov [3]

Answer: N5 + H4 and then do 13.5 * 17.8 then solve so 240.3 divided by 9

Your answer is 26.7  Pretty sure

Explanation: (study)

6 0
3 years ago
Read 2 more answers
Would you expect a Boron (B) atom with atomic mass = 9.999 to be stable?
charle [14.2K]

The balance of forces allows to find the result for the question if the isotope of boron 9.99 una  is stable:

  • The boron isotope of mass 9.99 uma is unstable because the repulsive force increases.

The stability of atomic nuclei depends on the balance the force is electrostatic repulsion between the protons and the strong interaction of attraction.

One way to achieve this balance is to increase the separation of the protons with uncharged particles between them, the neutral ones, the strong interaction is of the same magnitude for protons and neutrons, therefore the repulsion is decreased and the strong attraction interaction is maintained. .

In the case of Boron, which has 5 protons, the stable structures have more atomistic 10 and 11 una, which is why it has 5 and 6 neutrons each. Therefore each proton has  a neutrons next to it and in the other case a proton at the end has two neutrons, this causes the distance between the protons to increase, decreasing the electrostatic repulsion.

It indicates that we have a Boron nucleus of mass 9.999. The number of protons must remain fixed, therefore there are only 4 neutrons.

Consequently, some of the protons does not have a neutron next to it and can approach the other proton, therefore the electrostatic repulsion increases and the stability of the atom decreases.

In conclusion, using the balance of Forces we can find the result for the question if the isotope of boron 9.99 una is stable:

  • The boron isotope of mass 9.99 amu is unstable because the repulsive force increases.

Learn more about nuclear stability here: brainly.com/question/897383

6 0
3 years ago
A large mass of moving ice and sown on land that covers much of continent or large island
Sliva [168]
I'm guessing Continental Glacier?
3 0
3 years ago
How many calories of heat are needed to raise the temperature of 33.0 g of diethyl ether from 14.0 ∘C to 25.0 ∘C ?
Xelga [282]

The amount of heat (in calories) needed to raise the temperature is 324.885 calories

<h3>How to determine the temperature change </h3>

We'll begin by obtaining the temperature change. This can be obtained as followed:

  • Initial temperature (T₁) = 14 °C
  • Final temperature (T₂) = 25 °C
  • Change in temperature (ΔT) = ?

ΔT = T₂ - T₁

ΔT = 25 - 14

ΔT = 11 °C

<h3>How to determine the heat (in Calories)</h3>

The amount of heat needed to raise the temperature can bee obtaimedals follow:

  • Mass (M) = 33 g
  • Change in temperature (ΔT) = 11 °C
  • Specific heat capacity (C) of diethyl ether = 0.895 cal/g°C
  • Heat (Q) =?

Q = MCΔT

Q = 33 × 0.895 × 11

Q = 324.885 calories

Thus, the amount of heat needed is 324.885 calories

Learn more about heat transfer:

brainly.com/question/10286596

#SPJ1

3 0
1 year ago
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