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3 years ago

Why does the hull of an ocean -going ship rust quickly?

Chemistry

1 answer:

stepan [7]3 years ago

4 0

Metal rusts when it oxidized around moisture.

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How many atoms are in 4.4 mol Zn?

nirvana33 [79]

1 mol zn ------------- 6.02x10²³ atoms
4.4 mol -------------- ??

4.4 x ( 6.02x10²³ ) / 1 => 2.648x10²⁴ atoms of zn

6 0

3 years ago

Which of the following types of electromagnetic radiation have higher frequencies than visible light and which have shorter freq

gizmo_the_mogwai [7]

Answer:

3,4,1 and 6,5,2

Explanation:

In the electromagnetic spectrum the arrangement of the waves in increasing frequencies and decreasing wavelengths are as follows;

Radio waves

Microwaves

Infrared waves

Visible light rays

Ultraviolet rays

X-rays

Gamma rays

(a simple mnemonic is RMIVUXG)

5 0

3 years ago

THIS IS DUE TODAY!!!!!!!!!!!!!!!!!!!!!!!!!! PLEASE HELP ME ASAPPPPPPPP CHEMISTRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

allochka39001 [22]

Answer:

$\large \boxed{\text{0.1767 mol/L}}$$

Explanation:

(a) Balanced equation

3NaOH + H₃PO₄ ⟶ Na₃PO₄ + 3H₂O

(b) Moles of NaOH

$\text{Moles of NaOH} = \text{34.52 mL NaOH} \times \dfrac{\text{0.3840 mmol NaOH}}{\text{1 mL NaOH}} = \text{13.26 mmol NaOH}$

(c) Moles of H₃PO₄

The molar ratio is 1 mol H₃PO₄:3 mol NaOH.

$\text{Moles of H$_{3}$PO}_{4} = \text{13.26 mmol NaOH} \times\dfrac{\text{ 1 mmol H$_{3}$PO}_{4}}{\text{3 mmol NaOH}}\\\\= \text{4.419 mmol H$_{3}$PO}_{4}$

(d) Molar concentration of H₃PO₄

$c = \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c = \dfrac{n}{V} = \dfrac{\text{4.419 mmol}}{\text{25.00 mL}} = \text{0.1767 mol $\cdot$ L$^{-1}$}\\\\\text{The molar concentration of the NaOH is $\large \boxed{\textbf{0.1767 mol/L}}$}$

7 0

3 years ago

How to comprehend chemistry? A lot of it goes over my head and I don’t know where to start. Advice would be appreciated!

just olya [345]

I recommend this channel called "Crash Course" on youtube and he has a playlist full of chemistry videos he makes it very fun & very easy to understand. Another option i recommend is researching chemistry on this website called "Khan academy" i did and it helped me alott!!

7 0

3 years ago

Which term names the main class of the chemical that makes up bread?

Anettt [7]

Answer is: carbohydrates.
Main component of bread is flour and main component of flout is starch.
Starch is a polymeric carbohydrate consisting of a large number of glucose units bonded by glycosidic bond. Starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol.

5 0

4 years ago

Read 2 more answers