All categories

3 years ago

Explain what physical state ypu would expect astatine to be in at room temperature

2 answers:

8 0

Solid
Astatine should have a melting point of about 300°C and a boiling point of about 340°C. This means that it will be solid at room temperature.

VashaNatasha [74]3 years ago

7 0

Answer:

Solid

Explanation:

Astatine should have a melting point of about 300°C and a boiling point of about 340°C. This means that it will be solid at room temperature as room temperature is 20°C

You might be interested in

Consider the group a1 element sodium atomic number 11, the group 3a element aluminum atomic number 13, and the group 7a element

Akimi4 [234]

According to there chemical properties

7 0

4 years ago

1,670,000,000 in<br> scientific notation pleaseeee

noname [10]

Answer:

1.67 × 10^9

Explanation:

6 0

3 years ago

Read 2 more answers

A method used by the U.S. Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the

baherus [9]

Answer: 1. $9.08\times 10^{-6}$ moles

2. 90 mg

Explanation:

$O_3(g)+2NaI(aq)+H_2O(l) \rightarrow O_2(g)+I_2(s)+2NaOH(aq)$

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus $4.54 \times 10^{-6}$ moles of ozone is removed by = $\frac{2}{1}\times 4.54 \times 10^{-6}=9.08\times 10^{-6}$ moles of sodium iodide.

Thus $9.08\times 10^{-6}$ moles of sodium iodide are needed to remove $4.54\times 10^{-6}$ moles of $O_3$

2. $\text{Number of moles of ozone}=\frac{0.01331g}{48g/mol}=0.0003moles$

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus 0.0003 moles of ozone is removed by = $\frac{2}{1}\times 0.0003=0.0006$ moles of sodium iodide.

Mass of sodium iodide= $moles\times {\text {molar mass}}=0.0006\times 150g/mol=0.09g=90mg$ (1g=1000mg)

Thus 90 mg of sodium iodide are needed to remove 13.31 mg of $O_3$ .

3 0

3 years ago

Tough and malleable form of iron is

Alenkasestr [34]

The answer to your question is A. Wrought iron because amongst its other properties, wrought iron becomes soft at red heat, and can be easily be forged and forge welded.

4 0

3 years ago

Read 2 more answers

Nuclear energy comes from an atom's _____. <br><br> A. shells B. charge C. nucleus D. electrons

Shalnov [3]

This would be C. nucleus

4 0

3 years ago

Read 2 more answers