Answer:
Rutherford predicted that an atom has a dense core called a <u>nucleus</u>.
Explanation:
Ernest Rutherford was a physicist who is known as the father of nuclear physics. He suggested an atomic model known as the Rutherford model. According to him, the atom consists of a tiny, dense, positively charged core called a nucleus and negatively charged particles called electrons that circulate around it The nucleus consists of positively charged particles called protons and neutral particles called neutrons.
"Sigma"s between the hydrogens and the oxygen
Answer:
Option B - Density increases
Explanation:
Density is defined as:
δ = mass / volume
When T°2 is > T°1, volume has been increased
As the volume increased, density has decreased.
↓δ = mass / volume ↑
In the situation above, temperature decreased from 4° to 0°.
The volume has been reduced, so the density has been increased.
↑ δ = mass / volume ↓
Rate of Sulfur dioxide : 2730.44 mL/s
<h3>Further explanation </h3>
Graham's law: <em>the rate of effusion of a gas is inversely proportional to the square root of its molar masses or </em>
the effusion rates of two gases = the square root of the inverse of their molar masses:
![\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }](https://tex.z-dn.net/?f=%5Crm%20%5Cdfrac%7Br_1%7D%7Br_2%7D%3D%5Csqrt%7B%5Cdfrac%7BM_2%7D%7BM_1%7D%20%7D)
or
![\rm M_1\times r_1^2=M_2\times r_2^2](https://tex.z-dn.net/?f=%5Crm%20M_1%5Ctimes%20r_1%5E2%3DM_2%5Ctimes%20r_2%5E2)
MW of N₂ = 28 g/mol
MW SO₂ = 64 g/mol
![\tt 28\times 79^2=64\times r_2^2\\\\r_2^2=\dfrac{28\times 79^2}{64}=2730.44~mL/s](https://tex.z-dn.net/?f=%5Ctt%2028%5Ctimes%2079%5E2%3D64%5Ctimes%20r_2%5E2%5C%5C%5C%5Cr_2%5E2%3D%5Cdfrac%7B28%5Ctimes%2079%5E2%7D%7B64%7D%3D2730.44~mL%2Fs)