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3 years ago

What is the density of a 5 mL sample of 1.95g of Gold

Chemistry

1 answer:

insens350 [35]3 years ago

7 0

Answer:

density=mass/volume

=1.95/5 = 0.39 g(mL)-¹

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A thermometer reads a temperature to be 38.0 °C. What is the temperature in

12345 [234]

Answer:

$\boxed {\tt 311.15 \ K}$

Explanation:

To convert degrees Celsius to Kelvin, use the following formula.

$K= \textdegree C +273.15$

Since we are trying to find 38 degrees Celsius in Kelvin, so we should substitute 38 in for degrees Celsius.

$\textdegree C =38$

$K=38+273.15$

Add 38 and 273.15.

$K=311.15$

38 degrees Celsius is equal to 311.15 Kelvin

7 0

3 years ago

Be sure to answer all parts. In the electrolysis of molten BaI2, (a) What product forms at the negative electrode? (b) What prod

Tcecarenko [31]

Answer:

(a) Barium is produced at the negative electrode

(b) Iodine is produced at the positive electrode

Explanation:

When an electric current is passed through a solution containing electrolyte, a non spontaneous reaction is stimulated. This results in the flow of positively charged ions to negatively charged electrodes(cathode) and negatively charged ions to positively charged electrodes(anode)

When an electric current is passed through molten $BaI_{2}$ in the electrolytic cell, the following reactions takes place:

$BaI_{2}$ → $Ba^{2+}$ + 2 $I^{-}$

At the anode;

Iodine ions will lose an electron and will be oxidized to iodine

$2I^{-}$ → $I_{2}$ + $e^{-}$

At the cathode;

Barium ions gains electrons and its reduced to barium metal

$Ba^{2+}$ + $2e^{-}$ → Ba

3 0

3 years ago

Is nitride on the periodic table

sasho [114]

Answer:

yes

Explanation:

Nitride, any of a class of chemical compounds in which nitrogen is combined with an element of similar or lower electronegativity, such as boron, silicon, and most metals.

4 0

3 years ago

At 25∘C, the decomposition of dinitrogen pentoxide, N2O5(g), into NO2(g) and O2(g) follows first-order kinetics with k=3.4×10−5

Annette [7]

Answer:

4600s

Explanation:

$2N_{2}O_{5}(g) - - -> 4NO_{2}(g) +O_{2}$