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STatiana [176]
3 years ago
15

How can a scientist make sure that the results are not a mistake in an experiment?

Chemistry
1 answer:
olga55 [171]3 years ago
8 0
Repeat trials multiple times
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Write the chemical equation for hbro reacting with water. what are the products? do you expect to have any hbro molecules left i
Vinil7 [7]
1) HOBr stands for hypobromous acid. On reacting with water, products formed are OBr- and H3O+. Following reaction occurs during this process.

<span>                                     HOBr + H2O </span>⇄<span> OBr- + H3O+

2) HOBr is a weak acid and have a lower value of dissociation constant (Ka ~ </span><span>2.3 X 10^–9). Hence, </span><span> large number of undissociated HOBr molecules are left in solution, when the reaction is completed/reaches equilibrium.</span>


6 0
3 years ago
Read 2 more answers
A 13.0 kg iron weightlifting plate has a volume of 1650 cm3 . What is the density of the iron plate in g/cm3?
Salsk061 [2.6K]
11.0 kg = (11.0 kg)(1000 g/kg) = 11000 g
(11000 g)/(1400 cm3) = 7.857 g/cm3
Simplified = 7.86 g/cm3
8 0
3 years ago
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Which fossil fuel is mainly used for heating and cooking?
Anna [14]

I would say C. petroleum


A is wrong

B is impractical for "mainly used"

D thats too expensive

4 0
3 years ago
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Aqueous silver ion reacts with aqueous chloride ion to yield a white precipitate of solid silver chloride. When 10.0 mL of 1.00M
torisob [31]

Answer:

Explanation:

AgNO3 + NaCl --> AgCl + NaNO3

Number of moles

AgNO3

= molar concentration * volume

= 1 * 0.01

= 0.01 mol

NaCl

= 0.01 * 1

= 0.01 mol.

By stoichiometry, 1 mole of silver nitrate reacted with 1 mole of NaCl. Therefore,

Number of moles of AgCl formed = 0.01 × 1

= 0.01 mol AgCl formed.

Heat absorbed by solution during precipitation:

Mass of solution = density × total volume

= 1 × 20

= 20 g.

q = m * Cp * (T2 - T1)

= 20 * 4.18 * (32.6 - 25.0)

= 635 J

Since 635 J was absorbed by the solution, the reaction released -635 J

So, Delta H = -635 J/0.01 mol

= -63500 J/mol

= -63.5 kJ/mol.

8 0
3 years ago
What is the term for a chemical reaction that uses more energy to break bonds than it releases when forming them?
Alchen [17]

Answer: Endothermic Reaction

Explanation:

7 0
2 years ago
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