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
Rainbow [258]
2 years ago
9

Given:

Chemistry
1 answer:
faltersainse [42]2 years ago
5 0

Answer:

6moles of Mg

Explanation:

The reaction expression is given as:

          BO₃   +    3Mg   →    3MgO    +    B

Given:

Number of moles of B produced  = 2 moles

Unknown:

Number of moles of Mg required  = ?

Solution:

  From the balanced reaction expression:

          1 mole of B is produced from 3 moles of Mg

          2 moles of B will be produced from 2 x 3  = 6moles of Mg

You might be interested in
Whats the si unit chemist use to measure the amount of an element substance?
Westkost [7]
The SI unit for the amount of substance present is the mole.

The mole is defined as the amount of substance that has the same amount of particles as there are atoms in 12 grams of carbon-12. Mathematically, the moles of a substance may be computed using:

moles present = mass of substance / molecular mass of substance
4 0
3 years ago
Why should we store Phosphorus in water​
ryzh [129]

Answer:

Only white phosphorus is stored under water. White phosphorus spontaneously reacts with oxygen in the air to burst into flame to form phosphorus pentoxide

Explanation:

3 0
3 years ago
2. Explain what an isotope is and give two important physical properties of isotopes that make them useful in biological researc
katrin [286]

Answer:

<h2>isotope is a variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.All isotopes of a given element have the same number of protons but different number of neutrons in each atom.</h2>

<h2>The 2 important physical properties of isotope is</h2>

<h2>1.<u>M</u><u>e</u><u>l</u><u>t</u><u>i</u><u>n</u><u>g</u><u> </u><u>Points</u></h2><h2>2.<u>B</u><u>o</u><u>i</u><u>l</u><u>i</u><u>n</u><u>g</u><u> </u><u>Points</u></h2>
8 0
3 years ago
If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, what does that indicate
julsineya [31]
The correct answer is :
The sun burns its fuel using oxygen.
4 0
3 years ago
Read 2 more answers
For the Bradford assay, the instructor will make a Bradford reagent dye by mixing 50 ml of 95% v/v ethanol with 100 mg of Coomas
Flauer [41]

Answer:

4.25% is the final concentration of phosphoric acid.

Explanation:

Initial concentration of phosphoric acid = C_1=85\%=0.85

Initial volume of phosphoric acid = V_1=50 mL

Final concentration of phosphoric acid = C_2=?

Final volume of phosphoric acid = V_2=1 L=1000 mL

( 1L = 1000 mL)

C_1V_1=C_2V_2

C_2=\frac{C_1times V_1}{V_2}

=\frac{0.85\times 50 mL}{1000 mL}=0.0425=4.25%

4.25% is the final concentration of phosphoric acid.

4 0
3 years ago
Other questions:
  • What do leaves produce
    5·2 answers
  • Which mass is easily forgotten about when trying to prove the law of conservation of mass in a chemical reaction.
    15·2 answers
  • Chem help please. i cant figure out this problem
    7·1 answer
  • A store sells 4 reams of paper for $23.08. Which proportion can be used to find the cost of 12 reams of paper?
    5·1 answer
  • Sig figs chemistry help CHEMISTRY MATH IDK
    8·1 answer
  • Balance the reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1.
    9·1 answer
  • What kind of scale do you use to measure mass
    14·1 answer
  • Pls help I will give brainlist
    8·1 answer
  • What is the past tense of I'll<br>​
    12·2 answers
  • 7. Calculate the net charge of the following atoms.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!