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2 years ago

Write all products and relevant tests and observations when KOH reacts with NH4NO3

Chemistry

1 answer:

Leni [432]2 years ago

3 0

Answer:

get a bucket and a mop that's a wap that's wap I'm talking wobble wobble wobble that's a wap

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The normal boiling point of ethanol is 78.4 oC. Its enthalpy of vaporization is 38.6 kJ/mol. Estimate the vapor pressure of etha

Mashcka [7]

Answer: The vapor pressure of ethanol at $26.3^{o}C$ is 238.3 torr.

Explanation:

Given: $\Delta H_{vap}$ = 38.6 kJ/mol

$T_{1} = 26.3^{o}C = (26.3 + 273) K = 299.3 K$

$T_{2} = 78.4^{o}C = (78.4 + 273) K = 351.4 K$

Formula used to calculate the vapor pressure of ethanol is as follows.

$ln\frac{P_{2}}{P_{1}} = \frac{\Delta H_{vap}}{R} [\frac{1}{T_{1}} - \frac{1}{T_{2}}]\\$

Substitute the values into above formula as follows.

$ln\frac{P_{2}}{P_{1}} = \frac{\Delta H_{vap}}{R} [\frac{1}{T_{1}} - \frac{1}{T_{2}}]\\ \\ln \frac{760 torr}{P_{1}} = \frac{38600 J}{8.314 J/mol K}[\frac{1}{299.3} - \frac{1}{351.4}]\\\frac{760}{P_{1}} = 3.18\\P_{1} = 238.3 torr$

Thus, we can conclude that the vapor pressure of ethanol at $26.3^{o}C$ is 238.3 torr.

5 0

2 years ago

Given the following information regarding the masses and relative abundances for the isotopes of an element, determine its atomi

Ilia_Sergeevich [38]

Answer:

Average atomic mass = 58.51047 amu

The symbol is $Ni$

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})+(\frac {\%\ of\ the\ third\ isotope}{100}\times {Mass\ of\ the\ third\ isotope})+(\frac {\%\ of\ the\ fourth\ isotope}{100}\times {Mass\ of\ the\ fourth\ isotope})+(\frac {\%\ of\ the\ fifth\ isotope}{100}\times {Mass\ of\ the\ fifth\ isotope})$

Given that:

For first isotope:

% = 68.274 %

Mass = 57.9353 amu

For second isotope:

% = 26.095 %

Mass = 58.9332 amu

For third isotope:

% = 1.134 %

Mass = 61.9283 amu

For fourth isotope:

% = 3.593 %

Mass = 63.9280 amu

For fifth isotope:

% = 0.904 %

Mass = 63.9280 amu

Thus,

$Average\ atomic\ mass=\frac{68.274}{100}\times {57.9353}+\frac{26.095}{100}\times {58.9332}+\frac{1.134}{100}\times {61.9283}+\frac{3.593}{100}\times {63.9280}+\frac{0.904}{100}\times {63.9280}$

$Average\ atomic\ mass=39.55474 +15.37861854+0.702266922+2.29693304+0.57790912$

Average atomic mass = 58.51047 amu

The symbol is $Ni$

5 0

2 years ago

Metal atoms tend to give away valence electrons when they bond with nonmetal atoms. What type of bond will form between the meta

jek_recluse [69]

An ionc bond because electrons are transferred, creating a positive metal cation and negative nonmetal anion which attracts one another electrostatically.

6 0

2 years ago

Read 2 more answers

A solution prepared by dissolving 171 mg of a sugar (a molecular compound and a nonelectrolyte) in 1.00 g of water froze at -0.9

hichkok12 [17]

Answer:

The appropriate answer is "342 g/mol".

Explanation:

Given:

Freezing point,

= 0.93°C

Kf,

= 1.86°C/m

Mass,

= 171

As we know,

⇒ $Freezing \ point = Kf\times molality$

$0.93=1.86\times molality$

$Molality=\frac{0.93}{1.86}$

$=0.5 \ m$

Now,

⇒ $Molality=\frac{moles \ of \ sugar}{mass \ of \ water}$

$0.5=\frac{moles \ of \ sugar}{0.01}$

$moles \ of \ sugar=0.0005 \ mol$

hence,

The molar mass of the sugar will be:

= $\frac{mass}{moles}$

= $\frac{171\times 10^{-3}}{0.0005}$

= $342 \ g/mol$

7 0

2 years ago

1.Which one of the following is not a heterogeneous mixture?

yuradex [85]

1.Which one of the following is not a heterogeneous mixture?
C.cooking oil

2.Which one of the following is not a homogeneous mixture?

A.vegetable soup

3.The following characteristics describe which type of mixture, homogeneous or heterogeneous?
The substance is not uniform in appearance and each part of the mixture contains a combination of different ingredients in different ratios.

B.heterogeneous mixtures

4.The following characteristics describe which type of mixture, homogeneous or heterogeneous?
The substance is mixed uniformly throughout and each part of the substance contains the same ratio of materials with the same properties.

A.homogeneous mixture

8 0

2 years ago

Read 2 more answers

Write all products and relevant tests and observations when KOH reacts with NH4NO3​

Write all products and relevant tests and observations when KOH reacts with NH4NO3