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
katrin [286]
3 years ago
6

The mass of Earth is 5.974x10^24 kg. Assume that Earth is a sphere of diameter 1.28x10^4 km and calculate the average density of

Earth in grams per cubic centimeter.
Chemistry
1 answer:
frez [133]3 years ago
4 0

The average density of Earth is 5.44 g/cm³.

<em>Mass</em>

Mass = 5.974 × 10²⁴ kg = 5.974 × 10²⁷ g

<em>Volume </em>

<em>d</em> = 2<em>r</em> = 1.28 × 10⁴ km

<em>r</em> = 6.40 × 10³ km × (10³m/1 km) × (10² cm/1 m) = 6.40 × 10⁸ cm

<em>V</em> = ⁴/₃π<em>r</em>³ = ⁴/₃π × (6.40 × 10⁸ cm)³ = 1.098 × 10²⁷ cm³

<em>Density </em>

Density = mass/volume = (5.974 × 10²⁷ g)/(1.098 × 10²⁷ cm³) = 5.44 g/cm³

You might be interested in
Pb(OH)Cl, one of the lead compounds used in ancient Egyptian cosmetics, was prepared from PbO according to the following recipe:
sladkih [1.3K]

Answer:

8.59 g

2.25 g

Explanation:

According to the given situation the calculation of grams of PbO and grams of NaCL is shown below:-

Moles of Pb(OH)CL is

= \frac{Mass}{Molar\ mass}

= \frac{10.0 g}{259.65g / mol}

= 0.0385 mol

Mass of PbO needed is

= 0.385mol Pb(OH) Cl\times \frac{1 mol PbO}{1molpb (OH) cl} \times \frac{223.2g PbO}{1mol PbO}

After solving the above equation we will get

= 8.59 g

Mass of NaCL needed is

= \frac{1mol\ NaCl}{1molPb\ (OH)Cl} \times \frac{58.45NaCl}{1mol NaCl}

After solving the above equation we will get

= 2.25 g

Therefore we have applied the above formula.

7 0
3 years ago
How many moles of H2O2 are needed to react with 1.07 moles of N2H4?
I am Lyosha [343]

Answer:

2.14 moles of H₂O₂ are required

Explanation:

Given data:

Number of moles of H₂O₂ required = ?

Number of moles of N₂H₄ available = 1.07 mol

Solution:

Chemical equation:

N₂H₄  +   2H₂O₂       →   N₂ +  4H₂O

now we will compare the moles of H₂O₂ and N₂H₄

                          N₂H₄     :      H₂O₂  

                            1           :        2

                            1.07      :         2×1.07 = 2.14 mol

                   

6 0
3 years ago
A mystery object has a density of .75; will it sink or float?
brilliants [131]

Answer:float

Explanation:

8 0
3 years ago
I need help on this please
Hunter-Best [27]
Tha is really easy just search them all up ,but ill get  u started 
In which season is the sun closest to the earth?Answer Summer

7 0
3 years ago
What are the periodic trends of ionic radii? Check all that apply.
Troyanec [42]
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Why can baking soda be used to put out fires? (2 reasons)
    7·1 answer
  • What are van der waals forces
    12·2 answers
  • What is the molecule name for 2H2S?<br>​
    12·2 answers
  • 1. What is the difference between a systematic error and a random error?
    14·1 answer
  • Practice of leaving the stalks of crops in the ground to anchor topsoil
    5·2 answers
  • Help plz this was due 2 days ago but I don’t understand it at all
    5·2 answers
  • Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular sol
    5·1 answer
  • which of the following can be deduced from the periodic table? a.many physical properties of elements. b. distribution of variou
    15·1 answer
  • What is the mass of 531 ml of a liquid that has a density of 0.760 g/ml?
    10·1 answer
  • What is the mass of 2.00L of a solution with density of 1.15g/mL?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!