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3 years ago

A silicon atom has an atomic number of 14. What information does the atomic number tell you? (Choose all possible answers)

Chemistry

1 answer:

Bezzdna [24]3 years ago

5 0

Answer:

Silicon atoms have 14 protons.

Silicon atoms will react with other atoms in order to gain stability.

Silicon atoms have 14 electrons.

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Plants or animals with desirable characterstics are bred together to create improved varieties. What is this process called?

STatiana [176]

Answer:

cross breeding or selective breeding its common with dogs

Explanation:

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2 years ago

How does cellular respiration help humans

babunello [35]

Well, Cellular Respiration does a lot for your body in many ways! It breaks down the sugars, fats, and proteins and gives your body the energy (ATP) it needs from that.

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3 years ago

Read 2 more answers

A tank contains 115 miles of neon gas. It has a pressure of 57 atm at a temperature of 45 c. Calculate the volume of the tank.

Elena-2011 [213]

Answer:

Volume occupied by Neon gas is 52.67 L

Explanation:

Using Ideal Gas Equation:

PV = nRT

where

P = pressure exerted by the gas = 57 atm

V = volume occupied = ?

n = number of moles = 115 moles

R = Ideal gas constant = 0.0821 L.atm/K.mol

(R value should be taken according to the units of Temperature,pressure, volume and mole)

T = Temperature = 45 + 273 = 318 K

(For temperature conversion from C to K add 273 to temperature:T + 273)

PV = nRT , So

$V = \frac{nRT}{P}$

Put values of T,P,n,R

$V = \frac{115\times 0.0821\times 318}{57}$

$V = \frac{3002.39}{57}$

V = 52.67 L

Volume occupied by 115 moles of Neon gas at 57 atm Pressure and 45 C temperature is 52.67 L

6 0

3 years ago

If you put ouabain, an inhibitor of the Na+-K+ pump, on a neuron and then stimulate the neuron repeatedly, what do you expect to

Vesnalui [34]

Answer:

No immediate effect is observed

Explanation:

If you put ouabain, an inhibitor of the Na+-K+ pump, on a neuron and then stimulate the neuron repeatedly, there would be no immediate effect to the action potentials generated by the neuron because Na+ gets stucked inside the cell, the depolarization slope gets steeper, and the duration of the action potential shortens because the membrane potential reaches +30 mV and other voltage-gated channels are opening in the membrane.

3 0

3 years ago

In the following series indicate which one of the species is the smallest. Au, Au+, Au 2+, Au 3+

yulyashka [42]

Answer:

$\rm Au^{3+}$ would likely be the smallest.

Explanation:

In this question, $\rm Au$ likely represents a gold atom.

$\rm Au^{+}$ , $\rm Au^{2+}$ , and $\rm Au^{3+}$ are gold ions. The plus sign in the superscript shows that these ions are positive. In other words, each is formed when a $\rm Au$ atom loses one or more electrons. The number shows the charge on each of these ions. That's the same as the number of electrons that the $\rm Au$ atom needs to lose before forming this ion. The charge on $\rm Au^{3+}$ is more positive than that on the other two gold ions. As a result, each $\rm Au^{3+}$ ion contains fewer electrons than each of the other two ions.

Consider the electron-cloud model of an atom or an ion. The nucleus is very small and doesn't take up much space. The atom or ion takes space mainly because of the electron cloud that surrounds the nucleus. The nucleus attracts the valence electrons and pulls them inwards. At the same time, the electrons repel each other.

For the same $\rm Au$ nucleus (attractions on the electrons stay the same,) as the number of electrons decreases, the size of the repulsion decreases. As a result, for a series of ions or atoms with the same nucleus, the one with the smallest number of electrons will take up the least space. All four choices involve the $\rm Au$ nucleus. However, since each $\rm Au^{3+}$ particle contains the least number of electrons, it would also be the smallest.

5 0

2 years ago