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Tom [10]
3 years ago
8

Determine which of the following is the best example of a testable question:

Chemistry
1 answer:
solong [7]3 years ago
7 0

Answer:a

Explanation:

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When baking soda (NaHCO3) is heated, it decomposes, producing carbon dioxide, water, and sodium carbonate. The carbon dioxide is
11Alexandr11 [23.1K]

Answer:

mass of carbon-dioxide = 0.262 g

Explanation:

Firstly, write the chemical equation of the reaction and balance the equation accordingly.

2NaHCO3(aq) → CO2(g) + H2O(l) + Na2CO3(aq)

Calculate the molecular mass of  baking soda

molar mass of baking soda = 23 + 1 + 12 + 48 = 84 g

2 moles of baking soda = 2 × 84 = 168 g

molar mass of CO2 = 12 + 32 = 44 g

if  168 g of baking soda produces 44 g of carbon-dioxide

1 g of baking soda will produce ? grams of carbon-dioxide

cross multiply

mass of carbon-dioxide = 44/168

mass of carbon-dioxide = 0.2619047619

mass of carbon-dioxide = 0.262 g

7 0
3 years ago
Which is a TRUE statement about
Savatey [412]

Answer:

The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. Dispersion forces are present between any two molecules (even polar molecules) when they are almost touching.

Thus <em>PROTON movement causes partial  positive & negative charges creating </em>

<em>attraction</em> will be crrt

3 0
3 years ago
497.680 to the nearest gram (1 g)
Lelu [443]
14109 is the nearest gram
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Which of these objects has kinetic energy?
Bingel [31]

Answer:

A

Explanation:

Anything moving I'd using Kinetic Energy

8 0
2 years ago
what is the net ionic equation for the reaction that occurs when magnesium carbonate (s) and excess hydroiodic acid are combined
iogann1982 [59]

Answer:

2H+(aq) + 2Br-(aq) + Mg2+(aq) + S2–(aq) = Mg2+(aq) + 2Br-(aq) + H+(aq) + HS-(aq)

3 0
2 years ago
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