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2 years ago

10

if an iron nail is placed in a glass of water the nail will sink. Is the density of iron smaller than or larger than the density

of water ? explain

1 answer:

Gala2k [10]2 years ago

5 0

It has more density when it sinks because the water pushes away thats why people float they are less dense

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A scientist studies the DNA of three different species. The DNA from species A is more similar to DNA from species B than DNA fr

rewona [7]

DNA A and B are probably the most closely related because cells get DNA from the parent cells therefor similar DNA comes from relatives.

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3 years ago

Balance each of the following examples of heterogeneous equilibria and write each Kc expression. Then calculate the value of Kc

marysya [2.9K]

Explanation:

1) $2 Al(s) + 2 NaOH(aq) + 6 H_2O(l) \longleftrightarrow 2 Na[Al(OH)_4](aq) + 7 H_2(g)$

$Kc=\frac{[Na[Al(OH)_4]]^2*[H_2]^7}{[NaOH]^2}$

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

$Kc_{reverse}=\frac{1}{Kc}=\frac{1}{11}=0.091$

2) $H_2O(l) + SO_3(g) \longleftrightarrow H_2SO_4 (aq)$

$Kc=\frac{[H_2SO_4]}{[SO_3]^2}$

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

$Kc_{reverse}=\frac{1}{Kc}=\frac{1}{0.0123}=81.3$

3) $P_4(s) + 3 O_2(g) \longleftrightarrow P_4O_6(s)$

$Kc=\frac{1}{[O_2]^3}$

The Kc for the reverse reaction is the inverse of the Kc of the reaction:

$Kc_{reverse}=\frac{1}{Kc}=\frac{1}{1.56}=0.641$

5 0

3 years ago

2.<br> An alkane has at least on C=C<br> bond.<br> ut of<br> Select one:<br> O True<br> O False

garik1379 [7]

I think it’s false?????

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3 years ago

according to newtons law of universal gravitation, how are gravitational force and the distance between objects related

GrogVix [38]

Answer:

they are inversly related

Explanation:

As the force increases distance decreases .They are related with an equation

F= Gm1×m2/r^2

3 0

3 years ago

In the periodic table we use today, the elements are arranged by increasing mass. True or false

guapka [62]

99% sure its false

its arranged by atomic number now i believe

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3 years ago