Write hypothesis about a valcano

Answers

Answer 1

Answer:

Answer:

My hypothesis of a volcano is that it'll explode when it reaches it's maximum temperature

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The temperature at which a substance in the liquid phase transforms to the gaseous phase refers to the substance's _______. A. sublimation point B. boiling point C. melting point D. freezing point

How does heavy water behave compared to normal water

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You see, heavy water has much more mass. So it is heavier than the normal water
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Answer:

the phosphate head mixes with water ;the fatty acid tails do not

Explanation:

Which particles make up the nucleus of an atom? A. protons and electrons B. neutrons and electrons C. protons only D. protons and neutrons E. neutrons only

Answers

The correct answer is option D, that is, protons and neutrons.

The center of an atom is known as the nucleus, it comprises nucleons, that is, neutrons and protons, and is enveloped by the cloud of electrons. The nucleus exhibits the majority of the mass of the atom in spite of being a very small constituent of the atom. Approximately all the atom's mass is formed of the neutrons and protons in the nucleus with a very small donation from the orbiting electrons.

Help me, ANSWER ALL 6 QUESTION, if you completed, you will have 30 POINTS

Answers

Answer:

ONE: spoon/ catapult

TWO: ball holder

THREE: the joint

FOUR: the rotater

FIVE: I think it is a lever that picks up the big spoon/ catapult

SIX: I don't know the chapter

8. What is the heat of reaction when hydrogen and oxygen combine to form water?2H2(g) + O2(g) → 2H2O(1)
(AHC H20(I) = -285.8 kJ/mol)
A -120.9 kJ
B-241.8 kJ
C-571.6 kJ
D-285.8 kJ

Answers

Answer:

The heat of reaction when hydrogen and oxygen combine to form water is :

C. 571.6 kJ

Explanation:

Enthalpy Change = The enthalpy change for the formation of 1 mole of the substance from their standard state is called the enthalpy of formation.

This is intensive quantity as it is fixed for 1 mole .

Intensive properties = Those properties which are independent on the amount of the substance are intensive properties.

The value of these quantities does not get halve if you divide the substance into two equal parts. example , density, refractive index.

However , the enthalpy of reaction is extensive. Because on increasing the amount the value of the enthalpy also get doubles

Hence for this reaction :

$2H_(2)(g)+O_(2)\rightarrow 2H_(2)(l)$

Its value is -285.8 kJ for 1 mole

And here two moles are present . so the value of molar enthalpy is:

-285.8 x 2 = -571.6 kJ

Vinegar is a solution of acetic acid. What is the molarity of the solution produced when 125g of acetic acid (C2H4O2) is dissolved in sufficient water to prepare 1.50L of solution?