Scientists say that the solar system formed from______.

2 answers:

7 0

Answer: scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova). ... Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.

Explanation:

kherson [118]3 years ago

6 0

Answer:

a rotating disk of dust and gases

Explanation:

brainliest?

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5. Two reactants combine to form a product in the reaction A + B -> C. The rate of the reaction depends on the concentrations

Rina8888 [55]

Answer:

C. 2.

Explanation:

The total reaction order of this reaction is second order (2). For a second order reaction ,the rate depends on two variable concentration terms which may or may not be same.

Given that:

Two reactants combine to form a product in the reaction A + B → C

The above reaction is bimolecular as two molecules are involved in the reaction.

If $C_A$ and $C_B$ are the concentrations of A and B respectively at any time t, then assuming that the reaction is of first order with respect to both A and B , the overall order is second and the reaction rate is given by:

$\mathbf{\dfrac{-dC_A}{dt}=\dfrac{-dC_B}{dt}=k_2C__AC_B}$

where;

$\mathbf{k_2}$ = specific rate constant for a second order reaction and becomes the rate of the reaction when both $C_A$ and $C_B$ are unity.

4 0

3 years ago

Describe the critical property ofelectrons in 2s versus 2p orbitals that causes the radial distribution functions of these orbit

Rom4ik [11]

Answer:

Answer is explained in the explanation section below.

Explanation:

Penetration refers to the proximity of electrons in an orbital to the nucleus.

Deeper-penetrating electrons have less shielding and therefore a higher Effective nuclear charge (Zeff), but they better shield other electrons.

To illustrate penetration, we may use the idea of Zeff, or effective nuclear charge. It's actually the difference between the number of charged protons and the number of shielded electrons. To put it another way, how effective the nucleus is at attracting electrons. Since they do not shield themselves, the core electrons penetrate the most and are exposed to the most strong nuclear charge.

The electron probability density is highest in the orbital's centre or nucleus for 28-orbitals.

In a multi-electron unit, the electron density near the nucleus of an atom for each shell and subshell of an electron is used to measure the nucleus penetration by an electron.

Since it has a higher electron density near the nucleus, the 2s electron penetrates the nucleus of the atom more than the 2p electron.

A 2s electron is less well shielded by the core electrons than a 2p electron because it can spend more time near the nucleus as a result of the penetration.

Mathematical Expression:

v = $\frac{-Zeff * e^{z} }{r^{2} }$