Chemistry Middle School

Calculate the mass (in grams) of hydrogen gas produced when 33.61 g of
diborane (B2H) reacts with excess water.
B Holg) + 6H2O(1)→ 2 H3B03(s) + 6H2(g)
Only enter numerical value without units.​

Answers

Answer 1

Answer:

14.40g of H2

Explanation:

The balanced equation for the reaction is given below:

B2H6(g) + 6H2O(l) → 2H3BO3(s) + 6H2(g)

Next, we shall determine the mass of B2H6 that reacted and the mass of H2 produced from the balanced equation. This is illustrated below:

Molar mass of B2H6 = (2x11) + (6x1) = 28g/mol

Mass of B2H6 from the balanced equation = 1 x 28 = 28g

Molar mass of H2 = 2x1 = 2g/mol

Mass of H2 from the balanced equation = 6 x 2 = 12g

From the balanced equation above,

28g of B2H6 reacted to produce 12g of H2.

Finally, we shall determine the mass of H2 produced when 33.61g of B2H6 reacted with excess water. This can be obtained as follow:

From the balanced equation above,

28g of B2H6 reacted to produce 12g of H2.

Therefore, 33.61g of B2H6 will react to produce = (33.61 x 12)/28 = 14.40g of H2.

Therefore, 14.40g of H2 were produced from the reaction.

Related Questions

The products of a reaction are NaCl and H2O. What does the law of conservation of matter reveal about the reactants in the reaction? A. At least some of the reactants will include NaCl and H2O. B. The reactants will contain only Na, Cl, O, and H in some amounts. C. Na, Cl, O, H, and three other elements were the reactant elements. D. The reactants will have one Na, one Cl, one O, and two H atoms.

Answers

Answer:

D

Explanation:

total mass should be equal on both sides

it's a double do displacement reaction

HCl + NaOH --> NaCl + H2O

How many molecules are in each sample?
A. 4.9 g H2O
B. 54.4 g N^2
C. 89 g CCI4
D. 11 g C6H12O6

Answers

Answer:

To find the number of molecules first find the number of moles.

number of moles (n) = mass / molar mass (M)

then use the formula

N = n × L

where n = number of moles

N = number of entities

L = Avogadro's constant = 6.02 × 10^23entities to find the number of molecules

A. 4.9 g H2O

m = 4.9g

M = (2*1)+(16×1) = 2 + 16 = 18g/mol

n = 4.9/18 = 0.272mol

N = 0.272 × 6.02 × 10^23

= 1.6374*10^23 molecules of H2O

B. 54.4g of N2

m = 54.4g

M(N2) = 14×2 = 28g/mol

n = 54.4/28 = 1.942mol

N = 1.942 * 6.02*10^23

= 1.1690*10^24 molecules of N2

C. 89 g CCI4

m = 89g

M(CCl4) = 12 + (35.5 × 4) = 154g/mol

n = 89/154 = 0.577mol

N = 0.577 × 6.02 × 10^23

= 3.473*10^23 molecules of CCl4

D. 11 g C6H12O6

m = 11g

M(C6H12O6) = (12×6)+(12×1)+(16×6) =

180g/mol

n = 11/180 = 0.0611mol

N = 0.0611 × 6.02×10^23

= 3.678*10^22 molecules of C6H12O6

Hope this helps

Other Questions
Julie has three boxes of pens. The diagram shows expressions for the number of pens in each box. Look at these equations.Equals B +12B equals C +4Write an equation to show the relationship between a + c HELP PLZZZZZZZZZZZ!!!!!!! What happens to the price and the quantity bought and sold in the cocoa market if countries producing cocoa experience a drought and a new study is released demonstrating the health benefits of cocoa if a person vomit predict which part of his digestive system was unable to deliver the food to the next organ Solve the inequality.C - 12 > -1 find 1st, 2nd, 3rd, 4th and 10th nTh term. rule is 3n+4 Which of the following was not an important influence on the AmericanRevolution?A. The books of Enlightenment philosopher John LockeB. The need for natural resources created by the Industrial RevolutionC. The signing of the English Bill of RightsD. The execution of King Louis XVI What are the values of the variables in the triangle below? If your answer is not an integer, leave it in simplest radical form. The diagram is not drawn to scale. The graph of the function f(x)=-(x+3)(x-1) is shown below. What is true about the domain and range of the function? The table compares the number of subatomic particles in two atoms. Subatomic Particle Comparison Atom Protons Electrons Neutrons Q 11 11 12 R 11 10 12 Which of the following is true about the two atoms? a) They have the same charge and same mass. b) They have the same charge but different masses. c) They have different charges but the same mass. d)They have different charges and different masses. Which phrase includes alliteration?O A. That cookie tastes like heaven on Earth.O B. The kitchen doors pulled me in, and before I knew it, I had gobbleddown the whole cake.O C. Ice cream is my savior on days like today.O D. Some sweet smells are wafting through the kitchen door. Describe the Atlantic Trade route. Which three locations did the trade route meet? What was traded along the route? What was the Middle Passage? Write your response in a complete paragraph. prove the following identity: sec x csc x(tan x + cot x) = 2+tan^2 x + cot^2 x please provide a proof in some shape form or fashion :/ 1. Light from a laser shines through two narrow slits 0.300 mm apart and produces an interference pattern on a screen 4.35 m away consisting of 9 bright fringes over a distance of 6.4 cm. a) Draw a labeled diagram of this scenario and briefly explain how the interference pattern is created b) Calculate the wavelength of the laser. What color is it? Do class limits and class marks make sense for qualitative data classes? Explainyour answer.NEED QUICKLY Help pls I will give BRAINLY The g-factor is Multiple Choice the factor that helps us reason abstractly. a general intelligence factor that was thought to underlie performance in every aspect of intelligence. a score derived from one of several standardized tests that are designed to assess the overall intelligence. the same thing as crystallized intelligence. Which evidence supports the big bang theory? A. Planetesimals form in debris disks. B. Most galaxies are moving toward us. C. Uniform background radiation is detected in every direction. D. Galaxies spin faster than they should based on visible matter. what should I include in my short biography when applying for volunteering? How does his handling of them change during the course of the story? What causes this change? Use evidence from the story to support your ideas. THE STORY is the treasure of lemon brown.