1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nostrana [21]
4 years ago
15

When the reddish-brown mercury(ii) oxide (hgo) is heated, it decomposes to its elements, liquid mercury metal and oxygen gas. if

1.19 g hgo is decomposed to hg, calculate the mass of the pure hg metal produced. 2 hgo(s) 2 hg(l) + o2(g)?
Chemistry
1 answer:
konstantin123 [22]4 years ago
7 0
2HgO----->  2Hg  +  O2

find  the  moles  of  HgO,

moles=mass/molar  mass

1.19g/216.59(molar  mass  of  HgO) =   5.49  x10^-3moles

by  use   of  mole  ratio  between  HgO  and Hg  which  is  2:2    or  1:1  the moles   of  Hg  is  also   5.49  x10^-3  moles

mass  of  Hg  is  therefore  =  (5.49  x10^-3)  x  200.59  =  1.101  grams
You might be interested in
How does changing the ratio of nitrogen atoms and oxygen atoms change the compounds
Reptile [31]

Answer:

Explanation:

Compounds consist of atoms of different elements. In compound the atoms are present in fixed proportion. By changing the proportion compound will changed. For example,

Nitrogen and oxygen reacted to form the compound. By changing the proportion both will form different compound.

NO₂

Nitrogen dioxide consist of one atom of nitrogen and two atoms of oxygen. Their ration is 1 :2

NO

In nitric oxide one atom of oxygen and one atom of nitrogen are present.

Their ratio is 1 : 1.

N₂O

Nitrous oxide consist of two nitrogen atoms and one oxygen. Their ratio is

2 : 1

N₂O₄

Dinitrogen tetroxide consist of two nitrogen atoms and four oxygen atoms. Their ratio will written as 2 : 4

N₂O₅

Dinitrogen pentoxide consist of two nitrogen atoms and five oxygen atoms. Their ratio will written as 2 : 5

It can be seen that by changing the ratio of atoms compounds are changed.

8 0
3 years ago
Brent is doing research to make a type of baby bottle out of plastic that is free from harmful chemicals. What type of research
user100 [1]

Answer:

Applied

Explanation:

Since Brent is using his existing scientific knowledge to create a new product or invention then this falls under the category of Applied Research. Applied research includes using any theoretical or proven information in order to create something physical that can be used in our real-life world. Usually, this research focuses on solving a problem through the use of technology. Thisis exactly what Brent is trying to do by creating a new plastic that does not have harmful chemicals that can hurt babies in the long term.

7 0
3 years ago
A battery can provide a current of 4.60 A at 3.40 V for 2.50 hr. How much energy (in kJ) is produced? 1st attempt kJ Energy
Lunna [17]

Answer:

The energy produced equals 140.760 kJ

Explanation:

The relation between power, current and voltage is

Power=Current\times Voltage

Applying the given values in the relation above we get

Power=4.60\times 3.40=15.64W

Now Since Power=\frac{Energy}{Time}\\\\Energy=Power\times Time

Again applying the calculated values we get

Energy=15.64\times 2.50\times 3600=140760Joules=140.76kJ

4 0
4 years ago
Which process responsiblr for the growth a repair pf human tissue?
Alenkasestr [34]

Hey there!

"Which process responsible for the growth a repair of human tissue?"

  • 1. evolution
  • 2. germination
  • 3. celldivision
  • 4. natural selection

Well, it heals itself which is called the mitosis but none of those are your answer choices .. the one that seems to be closer to those two results would be: Option 3. \boxed{cell-division}

Therefore, your answer would most likely be: \boxed{cell-division}

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

8 0
3 years ago
What are the standard ways to make a solution of known concentration? (select all that apply.)?
MatroZZZ [7]

1- Molar solutions: based on number of moles of chemical in 1 litre of solution

2- Weight % solution:  the weight of chemical divided by the total weight of the solution (chemical + water) and multiplied by 100.

8 0
3 years ago
Other questions:
  • The stability of an isotope is based on its
    15·2 answers
  • Define ionization energy and explain why the second ionization energy of any element is higher than its first ionization energy.
    12·2 answers
  • Part A
    11·2 answers
  • The moon is not visible during which phase
    5·2 answers
  • Write the chemical equation for the reaction of Fe(II) ion (Fe2 ) with phenanthroline. (Use the abbreviation phen for the phenan
    15·1 answer
  • #47 <br> I think it’s a double displacement reaction but idk
    12·1 answer
  • Are these correct? Also, what is number 7?
    10·2 answers
  • I need help please, will give 5 stars
    5·1 answer
  • A children's liquid cold medicine has a specific gravity of 1.23. If a child is to take 1.5 tsp in a dose, what is the mass (in
    11·2 answers
  • Select all of the following that are true about your Zn-Ag cell.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!