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neonofarm [45]
3 years ago
9

Atoms of the same element with varying number of neutrons.

Chemistry
1 answer:
Marysya12 [62]3 years ago
8 0

Answer:

isotopes

Explanation:

trust me

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If you observe with the microscope that a cell contains chloroplasts can you conclude that this is a plant cell?
shusha [124]
Obviously since plant cell contains chloroplasts.
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3 years ago
What is one benefit and one limitation of comparative investigations
Ivan
<span>1. Seeing broader picture: determining gray areas, overlaps, and exclusions, biases, the primary focus.

2. Bias. Sources may have hidden agenda, personal discrimination conscience or unconscious and a limited view of the short term, long term effects.</span>
5 0
3 years ago
The atomic mass of gallium is 69.72 . The density of iron is 7.87 . The atomic mass of iron is 55.847 . Calculate the number of
laiz [17]

Answer:

the atomic mass of any elemet contains avogardo numberof atoms

In case of Gallium,

69.72 gram is atomic mass and it cotnains around 6.023*10^23 atoms of Gallium

but, 2000 punds = 907184.7 grams

907184.7 gram of gallium contains= 6.023*10^23* 907184/69.72

                                                          = 79 *10^26 atoms

Explanation:

8 0
3 years ago
Changes of state are a result of a change in the______of the matter.
jasenka [17]

Answer: -

Kinetic energy.

Explanation: -

Solids have the least kinetic energy and the highest intermolecular force of attraction among the three states of matter.

When heat energy is supplied to the solid, the kinetic energy of the solid particles increases. At some point, the kinetic energy becomes comparable to the intermolecular force of attraction. At that point solids change into liquids.

When further heat energy is given, at certain point the kinetic energy becomes far greater than the intermolecular forces of attraction. At that point it becomes gas.

4 0
3 years ago
But volcanoes are not all bad. Can you assess the value of volcanoes for the Earth? Why are they necessary and what good do they
Gelneren [198K]

Answer:

yes

Explanation:

volcanoes have done wonderful things for the earth

  • They help cool off the earth removing heat from its interior
  • volcanic emissions have produced the atmosphere and the water of the oceans
  • volcanoes make islands and add to the continent

volcanoes are necessary because:

fertile is another advantage of volcanic activity."In places like Japan,Indonesia,Philippines,Hawaii,volcanic material mixed in with the soil provides a lot of important nutrients

8 0
3 years ago
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