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
WILL MARK BRAINLIST
Free_Kalibri [48]

Answer:

The average speed must be 30mph so this means the car traveled for 2hrs 60/30

7 0
2 years ago
Consider the insoluble compound nickel(II) hydroxide , Ni(OH)2 . The nickel ion also forms a complex with cyanide ions . Write a
natali 33 [55]

Answer: Equilibrium constant for this reaction is 2.8 \times 10^{15}.

Explanation:

Chemical reaction equation for the formation of nickel cyanide complex is as follows.

Ni(OH)_{2}(s) + 4CN^{-}(aq) \rightleftharpoons [Ni(CN)_{4}^{2-}](aq) + 2OH^{-}(aq)

We know that,

      K = K_{f} \times K_{sp}

We are given that, K_{f} = 1.0 \times 10^{31}

and,    K_{sp} = 2.8 \times 10^{-16}

Hence, we will calculate the value of K as follows.

     K = K_{f} \times K_{sp}

     K = (1.0 \times 10^{31}) \times (2.8 \times 10^{-16})

        = 2.8 \times 10^{15}

Thus, we can conclude that equilibrium constant for this reaction is 2.8 \times 10^{15}.

4 0
3 years ago
In an chemicalbreaction involving Fe and S, it was found that 45.2 g of Fes was produced. If the percent yield of the reaction i
saw5 [17]

Answer:

47.8 g

Explanation:

Remember the equation for percent yield:

% yield = actual / theoretical

We're given two of the values in the question, so plug n' play:

0.945 = 45.2 / theoretical

theoretical = 47.8 g

Keep in mind you can use mass here without converting to moles because we're working with products only. If you were given a mass of reactants, you would need to convert to moles and using a balanced chemical equation find the corresponding moles of product produced.

7 0
3 years ago
In what month does winter begin in the southern hemisphere
Katyanochek1 [597]

In the Southern Hemisphere this would be around June 20 and culminates on September 22.

7 0
3 years ago
Read 2 more answers
Ryan hypothesizes that darker colors heat up faster.He places a thermometer inside a red wool sock , a green cotton glove, and a
soldi70 [24.7K]
He used different items. He should have used one item in different colors. For example, a red wool sock, a green wool sock, and a black wool sock.
8 0
3 years ago
Other questions:
  • What do you get when you mix lemons with gunpowder
    6·1 answer
  • Or each set of elements represented in this periodic table outline, identify the principal quantum number, n , and the azimuthal
    14·2 answers
  • Why is it important to have a controlled experiment
    15·2 answers
  • Are metallic bonds are found in compounds
    10·2 answers
  • 1 kg of water (specific heat = 4184 J/(kg K)) is heated from freezing (0°C) to boiling (100°C). What is the change in thermal en
    11·1 answer
  • Need help now! WRITER: Explain how ferns and fungi are different.
    15·1 answer
  • 7. what is the density of an object having a mass of 8.0 g and a volume of 25 cm^3? a) 0.32g/cm^3 b) 2.0 g/cm^3 c) 3.1 g/cm^3 d)
    12·1 answer
  • The two esters below are synthesized from the starting material below. identify and draw the neutral reagent that is missing.
    5·1 answer
  • Which of the following best describes an example of applied chemistry?
    15·1 answer
  • Please<br>list uses uses aluminium?​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!