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3 years ago

If eggs are so fragile, how do they actually protect the growing bird?

1 answer:

6 0

Although birds' eggs appear to be fragile, they are in fact extremely robust. The oval shape applies the same rules of engineering as an arched bridge; the convex surface can withstand considerable pressure without breaking.

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Describe the change that you made that led to the decrease in the size of the greenleaf population. Explain why the change led t

slavikrds [6]

Answer:

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Explanation:

3 0

2 years ago

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Combustion analysis is performed on 0.50 g of a hydrocarbon, and 1.47 g of CO2 and 0.902 g of H2O are produced. What is the empi

JulijaS [17]

1. The empirical formula of the hydrocarbon is CH₃

2. The molecular formula of the hydrocarbon is C₂H₆

<h3>How to determine the mass of Carbon </h3>

Mass of CO₂ = 1.47 g
Molar mass of CO₂ = 44 g/mol
Molar of C = 12 g/mol
Mass of C =?

Mass of C = (12 / 44) × 1.47

Mass of C = 0.4 g

<h3>How to determine the mass of H</h3>

Mass of compound = 0.5 g
Mass of C = 0.4 g
Mass of H = ?

Mass of H = (mass of compound) – (mass of C)

Mass of H = 0.5 – 0.4

Mass of H =0.1 g

<h3>1. How to determine the empirical formula </h3>

C = 0.4 g
H = 0.1 g
Empirical formula =?

Divide by their molar mass

C = 0.4 / 12 = 0.03

H = 0.1 / 1 = 0.1

Divide by the smallest

C = 0.03 / 0.03 = 1

H = 0.1 / 0.03 = 3

Thus, the empirical formula of the compound is CH₃

<h3>2. How to determine the molecular formula</h3>

Empirical formula = CH₃
Molar mass = 30 g/mol
Molecular formula =?

Molecular formula = empirical × n = mass number

[CH₃]n = 30

[12 + (3×1)]n = 30

15n = 30

Divide both side by 15

n = 30 / 15

n = 2

Molecular formula = [CH₃]n

Molecular formula = [CH₃]₂

Molecular formula = C₂H₆

Learn more about empirical formula:

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4 0

2 years ago

How to balance this equation in chemistry

saveliy_v [14]

Answer:

4NH₃(g) +3O₂(g) ⇒2N₂(g) +6H₂O(g)

Explanation:

4 0

3 years ago

What is the heat needed to raise the temperature of 24.7 kg silver from 14.0 degrees Celsius to 30.0 degrees Celsius? Specific h

ELEN [110]

Answer:

$Q=93.3kJ$

Explanation:

Hello,

In this case, by knowing that the heat due to a change of temperature is given by:

$Q=mCp\Delta T$

Whereas Q accounts for the heat, m for the mass, Cp the heat capacity and ΔT for the change in temperature. In such a way the required heat results:

$Q=24.7kg*236\frac{J}{kg^oC}*(30.0-14.0)^oC*\frac{1kJ}{1000J} \\Q=93.3kJ$

Best regards.

8 0

3 years ago

Which is an issue that governments must consider before passing conservation policies?

wariber [46]

Answer:

b. cost to implement conservation policies

Explanation:

4 0

3 years ago

Read 2 more answers

If eggs are so fragile, how do they actually protect the growing bird?​

If eggs are so fragile, how do they actually protect the growing bird?