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Akimi4 [234]
3 years ago
12

A hydrate of beryllium nitrate has the following formula: Be(NO3)2 - x H2O. The water in a 3.41-g sample of the hydrate was driv

en off by heating. The remaining sample had a mass of 2.43 g .
Find the number of waters of hydration (x) in the hydrate.
Chemistry
1 answer:
Scorpion4ik [409]3 years ago
5 0

Answer:

3.41-g

Explanation:

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You wish to analyze the purity of a compound via TLC. If you wanted polar compounds to remain near the bottom (baseline) of the
nikklg [1K]

Options:

A reverse phase TLC plate because the nonpolar stationary phase will interact with polar compounds more strongly.

A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.

A reverse phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.

A normal phase TLC plate because the nonpolar stationary phase will interact with nonpolar compounds more strongly.

Answer:A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.

Explanation:TLC(THIN LAYER CHROMATOGRAPHY) is a solid (stationary phase) and a liquid(mobile phase) technique of separation and purity determination that uses the principle of that different compounds have different adsorption rate and different solubility rate to the two phases between which they are partitioned.

ON A DEVELOPED THIN LAYER CHROMATOGRAPHIC PLATE A PURE COMPOUND WILL APPEAR ONLY ON ONE SPOT.

With TLC one can analyse multiple samples at the same time.

7 0
3 years ago
This drawing shows the internal anatomy of a sponge.
Evgen [1.6K]

Answer:

there is no drawing

Explanation:

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6 0
3 years ago
The following reaction occurs in aqueous solution: NH4 + (aq) + NO2 - → N2 (g) + 2H2O (l) The data below is obtained at 25°C.
GREYUIT [131]

Answer: The order with respect to NH_4^+ is 1.

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

NH_4^++NO_2^-\rightarrow N_2+2H_2O

Rate=k[NH_4^+]^x[NO_2^-]^y

k= rate constant

x = order with respect to NH_4^+

y = order with respect to ANO_2^-

n = x+y = Total order

From trial 1: 3.2\times 10^{-3}=k[0.0100]^x[0.200]^y    (1)

From trial 2: 6.4\times 10^{-3}=k[0.0200]^x[0.200]^y    (2)

Dividing 2 by 1 :\frac{6.4\times 10^{-3}}{3.2\times 10^{-3}}=\frac{k[0.0100]^x[0.2000]^y}{k[0.0200]^x[0.200]^y}

2=2^x,2^1=2^x therefore x=  1

Thus order with respect to NH_4^+ is 1.

8 0
3 years ago
Calculate the number of atoms in 150grams of aluminium
Reptile [31]

Explanation: PENIS PENIS PENIS PENIS

6 0
4 years ago
4. Why is it that your feet don't sink into the earth?
Kay [80]

Answer:

because our feet has more density

8 0
3 years ago
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