All categories

3 years ago

Provide a title short explanation or description accompanying an illustration or a photograph

Chemistry

1 answer:

alexdok [17]3 years ago

6 0

A small, green frog wearing a strawberry on its head as a hat

You might be interested in

PLS help I will give 100 points

goldenfox [79]

Answer:

3700000000

Explanation: Move decimal to the right of the amount the exponent is for 10 Give brainliest pls

4 0

3 years ago

What is the Chemical formula for Hexacarbon octaphosphide?

bagirrra123 [75]

Answer:C6P8

Explanation:

8 0

3 years ago

Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO Rig

BigorU [14]

Taking into account the reaction stoichiometry, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

In first place, the balanced reaction is:

2 HgO → 2 Hg + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

HgO: 2 moles
Hg: 2 moles
O₂: 1 moles

The molar mass of the compounds is:

HgO: 216.59 g/mole
Hg: 200.59 g/mole
O₂: 32 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

HgO: 2 moles× 216.59 g/mole= 433.18 grams
Hg: 2 moles× 200.59 g/mole= 401.18 grams
O₂: 1 mole× 32 g/mole= 32 grams

Then the following rule of three can be applied: if by reaction stoichiometry 32 grams of O₂ are produced by 2 moles of HgO, 250 grams of O₂ are produced from how many moles of HgO?

$moles of HgO=\frac{250 grams of O_{2} x2 moles of HgO}{32grams of O_{2}}$

moles of HgO= 15.625 moles≅ 15.63 moles

Finally, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

Learn more about reaction stoichiometry:

5 0

3 years ago

A. What evidence have you discovered to explain why air flows? B. What evidence have you discovered to explain why Earth has glo

Marina86 [1]

Water among the coast can be several degrees colder in different areas because the water is replenished and being pushed off the coast so these cooler and nutrient-rich waters rise from a depth of 50-300 meters to the surface of the ocean

7 0

3 years ago

Convert the following mass of a compound into moles. 23.5g of NaCl

krok68 [10]

Answer:

0.402 moles

Explanation:

1 mole NaCl/58.44g Nacl ×23.5g NaCl

grams get cancelled out and you are left with moles

5 0

3 years ago

Provide a title short explanation or description accompanying an illustration or a photograph ​

Provide a title short explanation or description accompanying an illustration or a photograph