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3 years ago

Help me pls someone plss???help me pls someone plss???

Chemistry

1 answer:

VLD [36.1K]3 years ago

4 0

I am pretty sure it is D, but I am NOT for sure!

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Which option is an isotope with 6 protons and 8 neutrons? (1 point)

Nikolay [14]

Answer:

${ \sf{oxygen - 6}}$

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3 years ago

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What animal did Darwin study in the Galapagos Islands?

Gennadij [26K]

Answer:

The answer is 4.

Explanation:

Finches.

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3 years ago

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For H3PO4, Ka1 = 7.3 x 10^-3, Ka2 = 6.2 x 10^-6, and Ka3 = 4.8 x 10^-13. A 0.10 M aqueous solution of Na3PO4 therefore would be

zmey [24]

Answer:

The aqueous solution of $Na_{3} Po_{4}$ therefore would be "strongly basic."

Explanation:

Strongly basic because the $Na_{3} Po_{4}$ is completely an ionic compound. These compound can be 100% splitted into metal ions and hydroxide ion when used in the aqueous solution. Each moles dissolves which can give rise to mole of hydrogen ions when used in the solution. Whereas strong bases are not soluble in water as well. in the presence of water equilibrium can also be achieved. A strong base has the capability which can just remove the proton from the molecule.

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3 years ago

32,500 joules are used to boil a sample of water at its melting point what is the mass of the water?

Ivenika [448]

Answer:

43.18 gm

Explanation:

Heat of fusion of water at 0° C is 334 j/gm

then you have to heat the water to boiling point (100 C)

specific heat of water is 4.186 j/g-c

x = grams of water

x ( 334 + 4.186 (100) ) = 32500

x = 43.18 gm

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2 years ago

A____H means that energy is ____ from a reaction.

ExtremeBDS [4]

Answer:

A negative ∆H means that energy is given off from a reaction

Explanation:

$2NO_2 (g)N_2 O_4 (g)\\\\\Delta H=-58 KJ per mol$

If the reaction has negative ∆H value then the reaction is exothermic

$N_2 O_4 (g)2NO_2 (g)\\\\\Delta H=+58 KJ per mol$

If the reaction has positive ∆H value then the reaction is endothermic

When Heat energy is given in the equation itself

If it is present on the left side it means that heat is absorbed and the reaction is Endothermic

If it is present on the right side it means heat is given off and the reaction is exothermic

4 0

4 years ago