All categories

2 years ago

Skill and

Chemistry

1 answer:

Leokris [45]2 years ago

5 0

Answer:

2.5 m/s

Explanation:

total of 12 meters in 30 seconds

12x2.5=30

You might be interested in

State the name of the ion which is oxidised in the following half equations. Cathode: Na+ + e– → Na Anode: 2Cl– → Cl2 + 2e–

jenyasd209 [6]

Answer:

hahahahhahhhahahaha

Explanation:

haahahahahhahahhaha

4 0

2 years ago

Which two parts do the capillaries surround? *

irga5000 [103]

Body cells and tissues

They help give oxygen and other nutrients to keep you healthy

Hope this helps, Godbless :)

6 0

2 years ago

Who was the second person to organize the elements on the periodic table and what property did he use to re-organize them?

makkiz [27]

Answer:

Dmitri Mendeleev

Explanation:

He was a Russian Scientist who decided to reorganize the periodic table after other notable scientists such as Antoine-Laurent Lavoisier had also tried to organize it based on the states of matter of the elements.

Mendeleev reorganized the period in the order of increasing atomic mass although there were some other modifications by modern scientists.

8 0

2 years ago

How many grams of H2O will be produced if 750. grams of Fe are produced?

aleksandr82 [10.1K]

Answer:

$\boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}$

Explanation:

Given:

Mass of ferous (Fe) produced = 750 gram.

To find:

Mass of water produced= ?

Solution:

Molar mass of Fe is 55.84 gram/mol

Let's find out the number of moles of ferous produced.

$\small \sf Number \: of \: moles = \frac{Given \: mass \: of \: substance }{Molar \: mass \: of \: substance}$

Substituting the given data in above formula.

$\small \sf Number \: of \: moles = \frac{750}{55.84}$

$\boxed{\small \sf Number \: of \: moles \: of \: Fe= 13.43 \: moles}$

Now the given reaction is,

$Fe_3O_4 + 4H_2 \rightarrow 3Fe + 4H_2O$

For every 3 mole of production of Fe, 4 mole of waters are produced.
let for 13.43 moles of Fe x moles of H2O will be produced.

now calculate the number of moles of H2O

$\sf \: \frac{3}{4} = \frac{13.43}{x} \\ \sf x = \frac{13.43 \times 4}{3} \\ \sf x = 17.90 \: moles$

$\small \boxed{\sf number \: of \: moles \: of \: H_2O= 17.90 \: moles}$

mass of one mole of H2O is 18 gram, so we can calculate mass of 17.90 moles.

$\small \sf \: Mass \: of \: H_2O = 17.90 \times 18 \\ \boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}$

Thanks for joining brainly community!

3 0

1 year ago

Write the number5. 18 x 10-1 in standard notation (using the same number of

Lostsunrise [7]

Answer:

3.45 x 10^5

Explanation:

3 0

2 years ago