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JulsSmile [24]
3 years ago
14

6. A group of students is performing a simple scientific investigation with baking soda and vinegar. The students place vinegar

in a beaker and put baking soda inside of a balloon. Then, the balloon with the baking soda is attached to the mouth of the beaker. The reaction of the baking soda being poured from the balloon into the beaker is shown Baking soda falls Vinegar and baking soda mixture into vinegar What evidence shows that a chemical change occurred with the baking soda and vinegar?
A The vinegar and baking soda released a gas.

B. The vinegar and baking soda gave off an odor.

C. The vinegar and baking soda produced a flame

. D. The vinegar and baking soda changed in temperature.​
Chemistry
1 answer:
natali 33 [55]3 years ago
5 0

Answer:

A. The vinegar and baking soda released a gas. Hope it helps. :)

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C3H8+3O2 = 3CO2+4H2O what is the enthalpy combustion
dezoksy [38]

Answer:

\Delta H_{comb}=2043.85kJ/mol

Explanation:

Hello there!

In this case, according to the given chemical reaction, it possible for us to set up the expression for the calculation of the enthalpy change as shown below:

\Delta H_r=-\Delta H_{comb}=3\Delta _fH_{CO_2}+4\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-3\Delta _fH_{O_2}

Thus, given the values of the enthalpies of formation on the attached file, we obtain:-\Delta H_{comb}=3(-393.5kJ/mol)+4(-241.8kJ/mol)-(-103.85kJ/mol)-3(0kJ/mol)\\\\-\Delta H_{comb}=-2043.85kJ/mol\\\\\Delta H_{comb}=2043.85kJ/mol

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State the type of bonding—ionic, covalent, or metallic—you would expect in each: (c) Na(s).
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Na(s) forms an ionic bond.

<h3>What is ionic bond?</h3>

The main interaction in ionic compounds is ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with dramatically differing electronegativities. Along with metallic and covalent bonds, it is one of the most common types of bonds. Atoms (or collections of atoms) possessing an electrical charge are known as ions. Ions with negative charges are created when atoms gain electrons (called anions). Positively charged ions are produced when atoms lose electrons (called cations). In contrast to covalence, this electron transfer is referred to as electrovalence.

Ionic chemicals normally do not conduct electricity when solid, only when molten or in solution. Depending on the charge of the ions they are made of, ionic compounds typically have a high melting point.

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5 0
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maxonik [38]

Answer:

<em>The type of vegetation a surface does affect the </em><em>water coming from above to sink in or runoff. </em>

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If the vegetation present is dense with  there was being hairy then also the water would not run out and will get absorbed by the roots letting the soil intact

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