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xxMikexx [17]
3 years ago
6

Which of the following is a concept from Darwin's theory of evolution by natural selection?

Biology
1 answer:
rosijanka [135]3 years ago
6 0
B and C only is the answer
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What does the Thermosphere represent.
inna [77]
I’m pretty sure this is right
The thermosphere is the layer in the Earths atmosphere directly above the mesosphere and below the exosphere. Within the layer of atmosphere, ultraviolet radiation causes photoionization of molecules creating ions the thermosphere continues the larger part of the Ionosphere.
4 0
3 years ago
A student is collecting the gas produced
marissa [1.9K]

Answer:

0.062 moles of hydrogen gas

Explanation:

We must first out down the reaction equation before we can attempt to solve the problem.

Mg(s) + 2HCl(aq) ----> MgCl2(aq) + H2(g)

Next we obtain the number of moles in 1.5 g of magnesium metal from;

Molar mass of magnesium = 24.3 gmol-1

Number of moles of magnesium= mass/molar mass = 1.5g/24.3gmol-1 = 0.062 moles

From the reaction equation;

1 mole of magnesium metal yields 1 mole of hydrogen gas

0.062 moles of magnesium metal will yield 0.062 moles of hydrogen gas

Therefore, reaction of 1.5g of magnesium metal with excess hydrochloric acid will yield 0.062 moles of hydrogen gas.

7 0
3 years ago
Keshaun measures the force of objects with different masses using a spring scale. keshaun pulls each object a distance of 0.5 me
kvasek [131]

As the mass of the object is increased, the force applied to the object increases to maintain the acceleration of the object.

<h3>Acceleration of the objects</h3>

The acceleration of the objects is determined from Newton's second law of motion as follows;

F = ma

a = F/m

<h3>for mass of 5 kg and force of 2 N</h3>

a = 2/5 = 0.4 m/s²

<h3>for mass of 7 kg and force of 4 N</h3>

a = 4/7 = 0.57 m/s²

<h3>for mass of 10 kg and force of 6 N</h3>

a = 6/10 = 0.6 m/s²

Thus, from the data above we can conclude that, as the mass of the object is increased, the force applied to the object increases to maintain the acceleration of the object.

Learn more about acceleration here: brainly.com/question/14344386

#SPJ1

6 0
2 years ago
Why are small aquatic organisms usually temperature conformers? see section 39.4 ( page 830) ?
weeeeeb [17]

they have a high ration of  surface area to volume and therefore readily lost heart

5 0
3 years ago
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Definition of kingdom
Hoochie [10]

Answer:

a country, state, or territory ruled by a king or queen.

6 0
2 years ago
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