1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horsena [70]
3 years ago
10

Determine the molar mass of CaO

Chemistry
1 answer:
Umnica [9.8K]3 years ago
5 0
56.0774 g/mol just took the test
You might be interested in
Does anyone know a website where it solves me these types of problems OR if someone can help me with them?
Brut [27]

Answer:

you can use the idea of molecular masses to calculate easily

7 0
3 years ago
How is steam different from water vapour
trapecia [35]
Steam is made from boiling things and water vapor is from boiling water.
7 0
3 years ago
Read 2 more answers
How many moles of chloride ions are there in 2.5 L of 5 M magnesium chloride?
castortr0y [4]

Answer:

n_{Cl^-}=25molCl^-

Explanation:

Hello,

In this case, since the given 5-M concentration of magnesium chloride is expressed as:

5\frac{molMgCl_2}{L}

We can notice that one mole of salt contains two moles of chloride ions as the subscript of chlorine is two, in such a way, with the volume of solution we obtain the moles of chloride ions as shown below:

n_{Cl^-}=5\frac{molMgCl_2}{L}*\frac{2molCl^-}{1molMgCl_2} *2.5L\\\\n_{Cl^-}=25molCl^-

Best regards.

4 0
3 years ago
Calculate the standard heat of reaction for the following methane-generating reaction of methanogenic bacteria: 4CH3NH2(g) + 2H2
PIT_PIT [208]

<u>Answer:</u> The standard heat for the given reaction is -138.82 kJ

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles.

The equation used to calculate enthalpy change is of a reaction is:

\Delta H^o_{rxn}=\sum [n\times \Delta H_f_{(product)}]-\sum [n\times \Delta H_f_{(reactant)}]

For the given chemical reaction:

4CH_3NH_2(g)+2H_2O(l)\rightarrow 3CH_4(g)+CO_2(g)+4NH_3(g)

The equation for the enthalpy change of the above reaction is:

\Delta H_{rxn}=[(3\times \Delta H_f_{(CH_4(g))})+(1\times \Delta H_f_{(CO_2(g))})+(4\times \Delta H_f_{(NH_3(g))})]-[(4\times \Delta H_f_{(CH_3NH_2(g))})+(2\times \Delta H_f_{(H_2O(l))})]

We are given:

\Delta H_f_{(H_2O(l))}=-285.8kJ/mol\\\Delta H_f_{(NH_3(g))}=-46.1kJ/mol\\\Delta H_f_{(CH_4(g))}=-74.8kJ/mol\\\Delta H_f_{(CO_2(g))}=-393.5kJ/mol\\\Delta H_f_{(CH_3NH_2(g))}=-22.97kJ/mol

Putting values in above equation, we get:

\Delta H_{rxn}=[(3\times (-74.8))+(1\times (-393.5))+(4\times (-46.1))]-[(4\times (-22.97))+(2\times (-285.8))]\\\\\Delta H_{rxn}=-138.82kJ

Hence, the standard heat for the given reaction is -138.82 kJ

3 0
3 years ago
Please fill this formula​
Maurinko [17]
1.) Na
2.) Cl ( at the second blank)
sodium metal+hydrochloric acid
3 0
2 years ago
Other questions:
  • For an atom’s electrons, how many energy sublevels are present in the principal energy level n = 4?
    10·2 answers
  • Match the events related to the formation of the universe with the stages in which they occurred
    5·1 answer
  • Why would 18 be wrong for the atomic mass of an atom with 6 neutrons, 6 electrons, 6 protons?
    12·1 answer
  • Which intermolecular force is the strongest? hydrogen bonding dispersion force ion-dipole force dipole-dipole force none of the
    5·1 answer
  • What is the molality of a solution containing 8.0 grams of solute in 0.50 kg of solvent?
    9·2 answers
  • Visible light, X Rays infrared radiation and radio waves all have the same
    10·1 answer
  • Aluminum can react with oxygen gas to produce aluminum oxide (Al2O3). What type of reaction is this?
    7·1 answer
  • 58.0 g of K2SO4 was dissolved in 500 g of water. What is the molality of this solution?
    10·1 answer
  • How many moles are present in 1.75 g of zinc sulfate, Znso, ?
    6·1 answer
  • What force keeps protons and neutrons together?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!