Ask question

Ask question

All categories

3 years ago

7

Use the masses of the elements below to calculate the mass of 8.70 moles of H3M (the number at the bottom of

1 answer:

sertanlavr [38]3 years ago

5 0

yes use the masses of an element below calculate the mass of it 8.70 mole of each 3M

You might be interested in

Which of the following describes a covalent bond?

BaLLatris [955]

I think it is C, because a covalent bond is a distribution of 2 atoms to 1 electron, meaning they are sharing and not exchanging, and the electronegravity would be above 1.7

5 0

2 years ago

Read 2 more answers

A scientist measures the standard enthalpy change for the following reaction to be -17.2 kJ : Ca(OH)2(aq) 2 HCl(aq)CaCl2(s)

elixir [45]

Answer: $\Delta H^{0}=-173.72$ kJ/mol

Explanation: <u>Enthalpy</u> <u>Change</u> is the amount of energy in a reaction - absorption or release - at a constant pressure. So, <u>Standard</u> <u>Enthalpy</u> <u>of</u> <u>Formation</u> is how much energy is necessary to form a substance.

The standard enthalpy of formation of HCl is calculated as:

$\Delta ^{0}=\Sigma H_{products}-\Sigma H_{reactants}$

$Ca(OH)_{2}_{(aq)}+2HCl_{(aq)}$ → $CaCl_{2}_{(s)}+2H_{2}O_{(l)}$

Standard Enthalpy of formation for the other compounds are:

Calcium Hydroxide: $\Delta H^{0}=$ -1002.82 kJ/mol

Calcium chloride: $\Delta H^{0}=$ -795.8 kJ/mol

Water: $\Delta H^{0}=$ -285.83 kJ/mol

Enthalpy is given per mol, which means we have to multiply by the mols in the balanced equation.

Calculating:

$-17.2=[-795.8+2(285.85)]-[-1002.82+2\Delta H]$

$-17.2=-1367.46+1002.82-2\Delta H$

$2\Delta H=17.2-364.64$

$\Delta H=-173.72$

So, the standard enthalpy of formation of HCl is -173.72 kJ/mol

8 0

2 years ago

Which element would react faster with oxygen because of the properties it possesses?

In-s [12.5K]

Answer:

Berryllium

Explanation:

its the most reactive (mark brainliest plz)

3 0

3 years ago

Read 2 more answers

What is the mass of 14.4 moles Fluorine?<br> 0.379g<br> 274.8<br> 1.32 g<br> 2.64g<br> 547 g

liberstina [14]

Answer:

D

Explanation: d

8 0

3 years ago

Read 2 more answers

Which metals have similar chemical properties? Check all that apply. barium beryllium rubidium radium titanium calcium platinum

forsale [732]

beryllium & calcium are the two in the same column or family

6 0

2 years ago

Read 2 more answers