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3 years ago

Matter that has a definite volume but no definite shape is a

Chemistry

1 answer:

Zielflug [23.3K]3 years ago

4 0

I think it’s A for the first one and C for the second one

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Sodium (Na) and chlorine (Cl) combine together to form table salt (sodium chloride). Looking at the periodic table, which elemen

hodyreva [135]

Answer:

A. Iodine (falls in the same group as chlorine)

Explanation:

7 0

4 years ago

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. Find the mass of 2.61 moles of H2O2.

charle [14.2K]

Mass of H₂O₂ = 88.778 g

<h3>Further explanation</h3>

The mole itself is the number of particles contained in a substance amounting to 6.02.10²³

Mole can also be determined if the amount of substance mass and its molar mass is known

$\large {\boxed {\boxed {\bold {mol = \frac {mass} {molar \: mass}}}}$

moles of H₂O₂ = 2.61

So the mass of H₂O₂(MW=34,0147 g/mol) :

$\tt mass=mol\times MW\\\\mass=2.61\times 34,0147 g/mol\\\\mass=88.778~g$

8 0

3 years ago

(a) Write the dissolution reaction for solid Na2CO3 below. (Use the lowest possible coefficients. Include states-of-matter under

Andreas93 [3]

Answer:

For a: The chemical equation for the dissolution of sodium carbonate is $Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

For b: The net acid-base reaction is $CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Explanation:

For a:

Dissolution reaction is defined as the reaction in which a solid compound gets dissolved in water to form aqueous solution.

The chemical equation for the dissolution of sodium carbonate follows:

$Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

The chemical equation for the ionization of sodium carbonate follows:

$Na_2CO_3(aq.)\rightarrow 2Na^+(aq.)+CO_3^{3-}(aq.)$

For b:

Now, the anion formed which is $CO_3^{2-}$ reacts with water to form conjugate acid.

The chemical equation for the reaction of anion with water follows:

$CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Hence, the net acid-base reaction of the anion formed and water is written above.

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3 years ago

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Anika [276]

Answer:

That reminds me of the avengers logo

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3 years ago

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What is the difference between a scientific theory and an opinion?

Sergio039 [100]

Answer:

An opinion is a statement describing a personal belief or thought that cannot be tested (or has not been tested) and is unsupported by evidence. ... Theories are not described as true or right, but as the best-supported explanation of the world based on evidence.

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3 years ago