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3 years ago

Describe an ionic bond

Chemistry

1 answer:

tatuchka [14]3 years ago

7 0

Answer:

An ionic bond is when a positively charged ion is formed with a negatively charged bond, and one atom transfers electrons to another.

Explanation:

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3 years ago

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Convert 0.04 HL to L.

aliina [53]

Answer:

4 liters brainliest Idc rn

Explanation:

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3 years ago

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For a given sample of ch3oh, the enthalpy change during the reaction is 82.3 kj . how many grams of methane gas are produced?

Leno4ka [110]

The equation is as follows;
2CH3OH(g) = 2CH4(g) + O2(g), ΔH= +252.8 kJ
From the equation; for the reaction to produce 2 moles of methane (32g) an energy of 252.8 kJ is released.
Therefore; for an energy of 82.3 kJ the number of moles that will be produced will be; = (2×82.3)/252.3
= 0.6524 moles
which is equivalent to 0.6524 × 16 = 10.438 g
There, the mass of CH4 produced will be 10.438 g

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4 years ago

Xavier would like to see an atom. In order to see an atom, Xavier would be best helped by a device that is capable of which of t

valentina_108 [34]

Answer:

The answer is C

Explanation:

An atom is extremely small, but a device to make them look bigger, like a microscope, will help Xavier see it

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3 years ago

Two solutions, initially at 24.69°C, are mixed in a coffee cup calorimeter (Ccal = 105.5 J/°C). When a 200.0 mL volume of 0.100

Lana71 [14]

Answer:The correct answer is option c.

Explanation:

$AgNO_3+NaCl\rightarrow AgCl+NaNO_3$

Specific heat of water = 4.18 J/g°C

Density of water = 1 g/ml

Mass of $AgNO_3$ solution ,m'= $1 g/ml\times 200 ml= 200 g$

Mass of $NaCl$ solution ,m''= $1 g/ml\times 100 ml= 100 g$

Since NaCl solution is present in lessor mass so, it will act limiting reagent.

Heat absorbed by the solution

$Q=mc\Delta T=(m'+m'')c\Delta T=300 g\times 4.18 J/g^oC\times (0.47^oC)=589.38 J$

Heat absorbed by the calorimeter , $Q'=mc'\Delta T=c'\Delta T=105.5J/^oC\times (0.47^oC)=49.585 J$

Heat released during reaction, $\Delta H_{rxn}$ =49.585 J+589.38 J=638.965 J

As we know that NaCl is present as limiting reagent, the product will form according to the availability of NaCl.

Moles of NaCl in 100.0 ml of 0.100 solution = 0.01 moles

1 mol of NaCl gives 1 mol of AgCl, then 0.01 mol of NaCl will give 0.01 mol of AgCl

Heat of the reaction per 1 mol of AgCl = $\frac{638.965 J}{0.01 mol}=6 63896.5 J/mol= 63.896 kJ/mol\approx 64 kJ/mol$

The heat released during the reaction that exothermic reaction's $\Delta H_{rxn}$ is negative.

Hence the correct answer is option c.

5 0

3 years ago