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
belka [17]
3 years ago
14

Calculate the mass of beryllium (Be) needed to completely react with 18.9 g nitrogen gas (N2) to produce Bez N2, which is the on

ly product of the reaction.
A. 6.19
B. 12.29
C. 18.29
D. 36.69
Chemistry
1 answer:
choli [55]3 years ago
4 0

Answer:

C = 18.29 g  

Explanation:

Given data:

Mass of beryllium needed = ?

Mass of nitrogen = 18.9 g

Solution:

Chemical equation:

3Be + N₂    →    Be₃N₂

now we will calculate the number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 18.9 g/ 28 g/mol

Number of moles = 0.675 mol

Now we will compare the moles of nitrogen and Be from balance chemical equation.

                     N₂        :       Be        

                       1          :       3

                  0.675       :      3/1×0.675 = 2.03 mol

Number of moles of Be needed are 2.03 mol.

Mass of Beryllium:

Mass = number of moles × molar mass

Mass = 2.03 mol ×   9.01 g/mol

Mass = 18.29 g  

You might be interested in
What is the mass of 1 mole of Pb?
s2008m [1.1K]
<span>How many moles Pb in 1 grams? The answer is 0.0048262548262548. We assume you are converting between moles Pb and gram. 1 mole is equal to 1 moles Pb, or 207.2 grams.</span>
3 0
3 years ago
Read 2 more answers
Balance the equation xcl2(aq)+agno3(aq)=x(no3)2(aq)+agcl(s)
lisabon 2012 [21]

Explanation:

XCl _{2(aq)} + 2AgNO _{3(aq)}→X(NO _{3}) _{2(aq)}   +2 AgCl _{(s)}

6 0
3 years ago
Read 2 more answers
determine the percent yield for carbon dioxide if 4.50 moles of propane yielded 7.64 moles of carbon dioxide
ira [324]

Answer:

Percent yield = 57%

Explanation:

Given data:

Number of moles of propane = 4.50 mol

Number of moles of carbon dioxide = 7.64 mol

Percent yield = ?

Solution:

Chemical equation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Now we will compare the moles of propane and carbon dioxide.

                            C₃H₈            :            CO₂

                                 1               ;                3

                                  4.50        :              3×4.50 = 13.5 mol

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield =  7.64 mol / 13.5 mol × 100

Percent yield = 0.57× 100

Percent yield = 57%

3 0
3 years ago
7. When solid carbon reacts with oxygen gas to produce carbon dioxide gas, woul the triangle H value be on the reactant or produ
garik1379 [7]

When solid carbon reacts with oxygen gas to produce carbon dioxide gas. the deltaH (enthalpy change ) value is negative .DeltaH would be on the product side of the equation.

<h3>What is enthalpy change? </h3>

In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.

Knowing whether q is endothermic or exothermic allows one to characterise the relationship between q and H. An endothermic reaction is one that absorbs heat and demonstrates that heat from the environment is used in the reaction, hence q>0 (positive). For the aforementioned equation, under constant pressure and temperature, if q is positive, then H will also be positive. In a similar manner, heat is transferred to the environment when it is released during an exothermic reaction. Thus, q=0 (negative). Therefore, if q is negative, H will also be negative.

Learn more about enthalpy change here :

brainly.com/question/1445358

#SPJ13

7 0
1 year ago
What is the term for a substance that acts on proton donor in one reaction and as a proton acceptor in another?
kolezko [41]
<span>Proton donor  is a Bronsted-Lowry acid , 
and </span> proton acceptor  of protons is a Bronsted-Lowry base.
3 0
3 years ago
Other questions:
  • HELP I DON'T HAVE MUCH TIME PLZ HELP ME IF YOU ARE REALLY GOOD AT SCIENCE COME TO MY QUESTION PLEASEEEE Which fossil fuel create
    10·1 answer
  • When is the BEST time to be treated for an STI?
    5·2 answers
  • How reactive is an atom of Sodium (na) and why?
    15·1 answer
  • How many grams of calcium phosphate can be produced when 78.5 grams of calcium hydroxide reacts with excess phosphoric acid? Unb
    6·1 answer
  • A flexible container is put in a deep freeze. Its original volume is 3.00 m3 at 25.0°C. After the container cools, it has shrunk
    13·2 answers
  • State what happens to atoms in a chemical reaction
    8·1 answer
  • Calculate the mass (g) of 1.5 moles of Sulfur. ​
    6·1 answer
  • The lone pair of electrons on the oxygen atom in an ester can form hydrogen bonds in some situations, but esters cannot form hyd
    8·1 answer
  • With a partner, look at the stone bricks used to build this building and think about how they changed over time. What caused the
    5·1 answer
  • a student lists three temperature measurements 100 f , 100 c, and 100 k of the highest temps 100 k is the highest true or false
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!