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
Veronika [31]
2 years ago
11

Two students made a model of the world's tallest building, the Burj Khalifa in Dubai. The scale of the model is 1:400. The stude

nts' model has a height of 2.07 m. How tall is the real building? O A. 0.005 m O B. 400 m O C. 193 m O D. 828 m ​
Chemistry
1 answer:
Anna [14]2 years ago
4 0

Answer:D

Explanation:

828m

You might be interested in
How are theres over 2,500 different minerals why?
SOVA2 [1]
A mineral occurs naturally, meaning that even though there are artificial substances that might be described as mineral-like they are not minerals
5 0
3 years ago
How many atoms are in 1.0 formula units of magnesium acetate?
Ray Of Light [21]

Answer:

15

Explanation:

Magnesium Acetate Mg(C2H3O2)2

Number of atoms:

Carbon = 4

Hydrogen = 6

Magnesium = 1

Oxygen = 4

Total = 15

7 0
3 years ago
A sample of oxide iron weighing 2.40g was heated in a stream of hydrogen until it was completely converted to the metal. If the
wlad13 [49]

Answer:

Fe₂O₃

Explanation:

To solve this question we must find the moles of Iron in 1.68g. With the difference of the masses we can find the moles of oxygen. The formula will be obtained with the ratio of both amount of moles:

<em>Moles Fe:</em>

1.68g * (1mol / 56g)  =0.03moles

<em>Moles O:</em>

2.40g-1.68g = 0.72g * (1mol/16g) = 0.045moles

The ratio O/Fe is:

0.045moles / 0.03moles = 1.5 moles. this ratio is obtained if the formula is:

<h3>Fe₂O₃</h3>
4 0
3 years ago
When can a compound be treated like an element when balancing chemical equations?
Marrrta [24]
A compound can be treated like an element when balancing chemical equations when : A. when there is no change to the atoms in the compound

If they remain together during the reaction, you can treat a compound as a singe atom.

hope this helps
7 0
3 years ago
Read 2 more answers
The major light absorbing pigment in green plant photosynthesis is
Rom4ik [11]
Chlorophyll, it is chlorophyll
7 0
3 years ago
Other questions:
  • An animal cell contains a nucleus and other organelles suspended in a watery solution that is encased in a flexible cell membran
    13·2 answers
  • What is the percent by mass of sodium in Na2SO4? total mass of element in compound molar mass of compound Use %Element x 100
    8·1 answer
  • how do you know the state of a compound when writing out the equation. WILL MARK BRAINLIEST PLEASE HELP!!
    10·1 answer
  • What prefixes is best for measuring large quantities like the mass of a person?
    7·1 answer
  • How many moles of Mg are contained in 11.0<br> grams of magnesium?
    15·1 answer
  • In which item is energy is stored in the form of gravitail energy
    6·1 answer
  • Why is photosynthesis important for ecosystems everywhere
    7·2 answers
  • The methylene chloride solution is filtered through sodium sulfate to:
    9·1 answer
  • Describe how modeling is useful in studying the structure of the atom.
    15·1 answer
  • Which statement explains how the charges on objects determine the electric force between them?(1 point)
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!