2 years ago

Can anyone help me with this please

Chemistry

2 answers:

ddd [48]2 years ago

4 0

Answer:

5 = particle 7= atoms

Explanation:

i renever easily

Goshia [24]2 years ago

3 0

5=particle 7= atoms. I renever easily

You might be interested in

When you do a displacement reaction with iron and copper what is the orange metal called

laiz [17]

It is called rust and it forms when water soaks into the metal forming a chemical reaction.

5 0

3 years ago

On number 2 if the atom has 3 protons,4 neutrons and 3 electrons what is the charge of the atoms nucleus?

laila [671]

0 is the correct answer.

7 0

3 years ago

The exhaust gas from an automobile contains 3% by volume of carbon monoxide (CO). Express this concentration in mg/m3 at 25oC an

ser-zykov [4K]

Answer:

$24540\frac{mg}{m^3}$

Explanation:

Hello,

In this case, since the 3% by volume is represented as:

$\frac{3L\ CO}{L\ gas}$

By using the ideal gas equation we compute the density of CO:

$\rho =\frac{MP}{RT} =\frac{28g/mol*1atm}{0.082\frac{atm*L}{mol*K}*298K}= 0.818g/L$

Then we apply the conversion factors as follows:

$=\frac{3L\ CO}{100L\ gas}*\frac{0.818g\ CO}{1L\ CO} *\frac{1000mg\ CO}{1g\ CO} *\frac{1000L\ gas}{1m^3\ gas} \\\\=24540\frac{mg}{m^3}$

Regards.

4 0

3 years ago

What is the pH of a 0.222 M acetic acid solution?

Oksi-84 [34.3K]

pH=2.7

<h3>Further explanation</h3>

Acetic acid = weak acid

$\tt [H^+]=\sqrt{Ka.M}$

Ka = acid ionization constant

M = molarity

Ka for Acetic acid(CH₃COOH) : 1.8 x 10⁻⁵

$\tt [H^+]=\sqrt{1.8\times 10^{-5}\times 0.222}\\\\=0.001998=1.998\times 10^{-3}$

$\tt pH=3-log~1.998=2.7$

7 0

2 years ago

Which characteristics do Jupiter and Saturn share? Check all that apply

Natasha2012 [34]

Answer:

The correct answers are first, fourth, fifth

Explanation:

6 0

2 years ago

Read 2 more answers

Can anyone help me with this please​

Can anyone help me with this please