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3 years ago

My feet get hot as soon as I touch the sand. What kind of heat transfer occurred?

Chemistry

1 answer:

monitta3 years ago

7 0

Conduction is the correct Answer
please mark brainliest

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How many protons are in 10 moles of gold? Please help! Thank you!

irinina [24]

3 is the answer hope it helps

3 0

3 years ago

Read 2 more answers

A student carefully placed 15.6 g of sodium in a reactor supplied with chlorine gas. When the reaction was complete, the student

BabaBlast [244]

Answer:

24.09 grams of chlorine gas reacted.

Explanation:

$2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)$

Moles of sodium chloride = $\frac{39.7 g}{58.5 g/mol}=0.6786 mol$

According to reaction, 2 moles of NaCl are formed from 1 mole chlorine gas.

Then 0.6786 moles of NaCl will be formed from;

$\frac{1}{2}\times 0.6786 mole=0.3393 mol$

Mass of 0.3393 moles of chlorine gas:

0.3393 mol × 71 g/mol = 24.09 g

24.09 grams of chlorine gas reacted.

5 0

3 years ago

Is the salt solution in the Dead<br>Sea dilute, concentrated or<br>saturated? Explain.

dexar [7]

The waters of the Dead Sea are extremely saline, and, generally, the concentration of salt increases toward the lake's bottom. ... The deep water was saturated with sodium chloride , which precipitated to the bottom.

5 0

2 years ago

An archaeologist graduate student found a leg bone of a large animal during the building of a new science building. The bone had

Vlad [161]

Answer : The time passed in years is $2.74\times 10^2\text{ years}$

Explanation :

Half-life of carbon-14 = 5730 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{5730\text{ years}}$

$k=1.21\times 10^{-4}\text{ years}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant disintegrate = 15.3

a - x = amount left after decay process = 14.8

Now put all the given values in above equation, we get

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{15.3}{14.8}$

$t=274.64\text{ years}=2.74\times 10^2\text{ years}$

Therefore, the time passed in years is $2.74\times 10^2\text{ years}$

4 0

3 years ago

What volume, in L, of a 6.3 M K2SO4 solution contains 44.1 g of K2SO4?

Alenkinab [10]

Answer:

= 1.60 L

Comment if you need step to step explanation.

8 0

3 years ago