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dolphi86 [110]
3 years ago
10

Food chains always begin with what type of organism? Why?

Chemistry
1 answer:
Inessa05 [86]3 years ago
6 0
The food chain always begins with a sun without it there would be no food chain... hope this helped!
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How many atoms of Neon are in 65.0 L of Neon gas?
umka21 [38]

Answer:

65.0 g NH3 x

mol NH3

17.04 g NH3

x  

6.02x1023 NH3 molecules

mol NH3

= 2.30x1024 NH3 molecules

(have uh good day)

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Tema [17]

Answer:

Match the words to the definitions.

Explanation:

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3 years ago
1. When the temperature of a rigid hollow sphere containing 685 L of helium gas is
mote1985 [20]
<h3>Answer:</h3>

250.756 moles He

<h3>Explanation:</h3>

From the question we are given;

Volume, L = 685 L

Temperature, T = 621 K

Pressure, P = 189 × 10 kPa

We are required to calculate the number of moles of the gas,

Using the Ideal gas equation,

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We can replace the known variables and constant in the equation to get the unknown variable, n.

Using ideal gas constant as 8.3145 L.kPa/K/mol

n=\frac{PV}{RT}

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n = 250.7557 moles

   n = 250.756 moles

The moles of helium contained in the sphere is 250.756 moles

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3 years ago
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X= 101.325 kPa
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