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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

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Heat Transfer Lab

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2 years ago
What is the precipitate for CuSO4+NaOH<br> (Balancing Equations)
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Answer:

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Explanation:

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3 years ago
Calculate the amount of heat required to completely sublime 55.0 g of solid dry ice CO2 at its sublimation temperature. The heat
aliina [53]

Answer:

40.4 kJ

Explanation:

Step 1: Given data

  • Mass of CO₂ (m): 55.0 g
  • Heat of sublimation of CO₂ (ΔH°sub): 32.3 kJ/mol

Step 2: Calculate the moles corresponding to 55.0 g of CO₂

The molar mass of CO₂ is 44.01 g/mol.

n = 55.0 g × 1 mol/44.01 g = 1.25 mol

Step 3: Calculate the heat (Q) required to sublimate 1.25 moles of CO₂

We will use the following expression.

Q = n × ΔH°sub

Q = 1.25 mol × 32.3 kJ/mol = 40.4 kJ

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2 years ago
NaOH+H3PO4=Na3PO4+H20
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Wait is that suppose to be a question??!!
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What is a coefficient?
mario62 [17]

Answer:

Coefficients are the numbers in front of the formulas.

4 0
3 years ago
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