Ask question

Ask question

All categories

3 years ago

9

Consider all the elements in the periodic table. The stair-step line between the pink squares and the yellow squares separates t

he _______ (pink) from the _______ (yellow)
A. Gasses; solids

B. Metals; nonmetals

C. Nonmetals; metals

D. Reactive; nonreactive

1 answer:

lesantik [10]3 years ago

4 0

B. Metals; nonmetals

You might be interested in

The lewis dot notation for two atoms is shown. What is represented by this notation? K loses one portion to CI, K gains one port

telo118 [61]

Answer:

K loses one electron to CI

Explanation:

The lewis electron dot notation shows only the chemical symbol of the element surrounded by dots to represent the valence electrons.

We have atom of K with one valence electrons

Cl with 7 valence electrons

For an electrostatic attraction to occur, both particles must be charged. To do this, one of the species must lose an electron, and the other gains it.

This will make both species attain a stable octet;

Hence, K will lose 1 electron and Cl will gain the electrons.

6 0

3 years ago

You have 4 moles of oxygen gas in a flask. 4 moles of helium gas is added. What happens to the total pressure of the gases in th

ASHA 777 [7]

Answer: The correct option is (c). The total pressure doubles.

Solution:

Initially, only 4 moles of oxygen gas were present in the flask.

$p_{O_2}=Tp_1\times X_{O_2}$ ( $X_{O_2}=\frac{4}{4}$ ) ( according to Dalton's law of partial pressure)

$p_{O_2}=Tp_1\times 1=Tp_1$ ....(1)

$Tp_1$ = Total pressure when only oxygen gas was present.

Final total pressure when 4 moles of helium gas were added:

$X'_{O_2}=\frac{4}{8}=\farc{1}{2},X_{He}=\frac{4}{8}=\frac{1}{2}$

partial pressure of oxygen in the mixture :

Since, the number of moles of oxygen remains the same, the partial pressure of oxygen will also remain the same in the mixture.

$p_{O_2}=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}$

$Tp_2$ = Total pressure of the mixture.

from (1)

$Tp_1=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}$

On rearranging, we get:

$Tp_2=2\times Tp_1$

The new total pressure will be twice of initial total pressure.

7 0

3 years ago

Which nitrogen-containing base is found only in rna?

bija089 [108]

The answer to this is Codon.

3 0

4 years ago

1. Necesitas un "cubo concentrado" (de esos que se usan para sazonar las comidas Maggie, ricostilla) dos vasos de vidrio o plást

Burka [1]

Respuesta:
El cubo Maggie es un sazonador que contiene caldo de pollo y grasas, por lo que se disuelve fácilmente al entrar en contacto con el agua caliente gracias a que la temperatura que derrite las grasas y se vuelven líquidas, mientras que con el agua fría no puede disolverse así de rápido ya que las grasas siguen en estado sólido.

6 0

3 years ago

How do you balance the chemical equation CH4+ O2= CO2+ 4H2O

viva [34]

$CH4+O2=CO2+4H20$

now split the equation in half

CH4+O2 I CO2 + 4H2O

C = 1 I C = 1

H = 4 I H = 8

O = 2 I O = 3

CH4+ 2O2 = CO2 + 2H20

7 0

3 years ago

Read 2 more answers