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nadya68 [22]
3 years ago
15

Which of the following is an incorrect statement?

Chemistry
1 answer:
raketka [301]3 years ago
6 0
Sound is a form of energy is incorrect

Sound is caused by the movement or vibration of matter

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Explain how mountain chains provide evidence to support the theory of continental drift.
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Mountain chains are formed by the action of different tectonic plates drifting
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4 years ago
Please Help , Thank You
Mazyrski [523]
The 3rd option is the answer 
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Copy and complete the concept map using the following:
lapo4ka [179]

Answer:

a) Alkali

b) Na

c) Cs

d) Inner Transition

e) actinides

f) Fe

g) Hg

Explanation:

  • K, Na and Cs are all Alkali Metals
  • Fe, Hg and Ag are all Transition Metals
  • actinides and lanthanides are known as the Inner Transition Metal

7 0
3 years ago
A solution of HCl has a concentration of 3.4 x 10-3 M. What would be the [OH-] of this solution?
Debora [2.8K]

Answer:

a

Explanation:

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7 0
3 years ago
How many moles of nitrogen gas are present in a 28.9 dm3 temperature of 55.0 °C and a pressure of 144 kPa?
jeka57 [31]

Given :

Temperature, T = 55° C = ( 55 + 273 ) K = 328 K .

Volume of container, V = 28.9 dm³ = 0.0289 m³ .

Pressure, P = 144 kPa = 144000 Pa .

To Find :

Number of moles of nitrogen  gas.

Solution :

We know, by ideal gas equation :

PV = nRT  ( R ( universal gas constant ) = 8.31 J K⁻¹ mol⁻¹ .

n = \dfrac{PV}{RT}\\\\n = \dfrac{144000\times 0.0289}{8.31 \times 328} \ moles\\\\n = \dfrac{4161.6}{2725.68}\\\\n = 1.53 \ moles

Therefore, number of moles of nitrogen gas is 1.53 moles.

8 0
3 years ago
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