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
deff fn [24]
3 years ago
6

How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 2H2 + O2 → 2H2O

Chemistry
2 answers:
denpristay [2]3 years ago
8 0

Answer : The correct option is, (C) 0.200 g

Explanation : Given,

Mass of water = 1.80 g

Molar mass of water = 18 g/mole

Molar mass of H_2 = 2 g/mole

First we have to calculate the moles of water.

\text{Moles of }H_2O=\frac{\text{Mass of }H_2O}{\text{Molar mass of }H_2O}=\frac{1.80g}{18g/mole}=0.1mole

Now we have to calculate the moles of hydrogen gas.

The given balanced reaction is,

2H_2+O_2\rightarrow 2H_2O

From the balanced reaction we conclude that

As, 2 mole of water obtained from 2 mole of H_2 gas

So, 0.1 mole of water obtained from 0.1 mole of H_2 gas

Now we have to calculate the mass of hydrogen gas.

\text{Mass of }H_2=\text{Moles of }H_2\times \text{Molar mass of }H_2

\text{Mass of }H_2=(0.1mole)\times (2g/mole)=0.2g

Therefore, the mass of hydrogen gas required will be, 0.2 grams

s344n2d4d5 [400]3 years ago
4 0
Answer is c

Work out the moles of 2H2O: 1.80/ (16+1+1) = 0.1
The moles of 2H2 are the same (0.1)
The Mr of H2 is 2

So the mass needed to produce 1.80g of water is
0.1 x 2 = 0.2
You might be interested in
What forces must be overcome for a substance to melt
olga_2 [115]

Intermolecular forces.

5 0
3 years ago
What is the hydroxide-ion concentration in a solution formed by combining 200. ml of 0.16 m hcl with 300. ml of 0.091 m naoh at
iren2701 [21]
34 degrees long that way you pass the exam
8 0
3 years ago
Which of the answer choices correctly identifies a scenario that displays evidence a chemical reaction is occurring?
tigry1 [53]
Sugar burns and turns black. A completely new substance was formed, which is the main pointer for it being a chemical reaction. More evidence would be change of color, odor, and the fact that flammability is a chemical property so setting something on fire would be a chemical change.
5 0
3 years ago
Read 2 more answers
A student tests elements and finds it to be malleable, a good conductor of electricity, but is not magnetic. Which is most likel
ELEN [110]

Answer:

copper

Explanation:

5 0
2 years ago
Arrange the following compounds in decreasing order of acidity from left to right, and explain the reason in less than 90 words.
saveliy_v [14]

Explanation:

More is the electronegativity of atoms attached to the alpha carbon atom more will be the attraction of electron towards it. As a result, release of hydrogen ion will be easier.

Therefore, there will be increased in acidity of the compound.

Since, fluorine, chlorine and bromine are all group 17 elements and fluorine is more reactive than chlorine. On the other hand, chlorine is more reactive than bromine.

Hence, ability to attract the electrons towards itself will be maximum in fluorine and least in bromine.

Therefore, decreasing order of acidity of the given compounds is as follows.

        CF_{3}COOH >  CCl_{3}COOH > CBr_{3}COOH > CH_{3}COOH

8 0
3 years ago
Other questions:
  • Which of the substances are largely ionic nonpolar covalent polar covalent?
    14·1 answer
  • A solution of a sugar with the chemical formula (c12h22o11) is prepared by dissolving 8.45 g in 250.0 ml of water at 25
    5·2 answers
  • A train in Japan can travel 813.5 miles in 5 hours
    14·1 answer
  • 36. What is the formula of pentaphosphorus decoxide?<br> A)P5010<br> B)PO 10<br> C)PO<br> D)P10 05
    9·1 answer
  • ASAP HELP with this question!!!
    15·2 answers
  • ¿Qué papel creen que cumplían en sus respectivas sociedades ? es para hoy porfis ayudemeee​
    5·2 answers
  • The half-life of carbon-14 is about ____________ years.<br><br> Fill in the blank.
    7·2 answers
  • Calcium and sulfur Enter the ions formed by these elements and separate your answers with a comma (e.G., Sr2+,As3−).
    6·1 answer
  • Iron has a density of 7.87 g/cm3. What is the volume in cm3 of 3.729 g of iron?
    14·1 answer
  • 100 POINTS! Final Honor Activity Question
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!