All categories

3 years ago

Help me please I really need it

Chemistry

1 answer:

Kitty [74]3 years ago

8 0

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.

b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes

c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2>

You might be interested in

Arrange elements in decreasing order of the number of valence electrons

meriva

Answer:

It’s voice and a

Explanation:

3 0

3 years ago

Car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?

Pepsi [2]

<span>0.0208 km/s is your speed</span>

6 0

4 years ago

Predict the boiling point of water at a pressure of 1.5 atm.

Lina20 [59]

Answer:

100.8 °C

Explanation:

The Clausius-clapeyron equation is:

$ln\frac{P_{1} }{P_{2}} =$ -Δ $\frac{H_{vap}}{r} (\frac{1}{T_{2}}-\frac{1}{T_{1}} )$

Where 'ΔHvap' is the enthalpy of vaporization; 'R' is the molar gas constant (8.314 j/mol); 'T1' is the temperature at the pressure 'P1' and 'T2' is the temperature at the pressure 'P2'

Isolating for T2 gives:

$T_{2}=(\frac{1}{T_{1}} -\frac{Rln\frac{P_{2}}{P_{1}} }{Delta H_{vap}}$

(sorry for 'deltaHvap' I can not input symbols into equations)

thus T2=100.8 °C

7 0

3 years ago

The periodic table is useful because it is organized to show many patterns and trends. What property shows a decrease moving fro

Morgarella [4.7K]

Answer:

"Electronegativity" decrease moving from the bottom of Group 3 to the top of Group 3

Explanation:

Electronegativity of an element tell us about the ability of an atom to attract the electrons towards the atom. It depends upon the atomic number and also the distance between the valence electrons that is present in the charged nucleus. The electronegativity will increase from left to right while moving in the periodic table. Electronegativity decreases from bottom to top. To measure the electronegativity pauling scale is used.

3 0

3 years ago

O que acontece quando uma moeda escurece? (oxidos quimica )

True [87]

Answer:

As moedas ficam sujas devido ao oxigênio do ar reagindo com o metal para formar óxido de cobre. Eles se tornam mais escuros à medida que envelhecem, à medida que a camada de óxido aumenta. O vinagre é um ácido (ácido acético) que pode ser usado para limpar superfícies e remover os óxidos indesejados.

Explanation:

8 0

3 years ago

Help me please I really need it ​

Help me please I really need it