How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
(2H2 + O2 2H2O)

Answers

Answer 1

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂   →   2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

                O₂         :         H₂O

                 1           :           2

                H₂         :         H₂O

                 2          :          2

               2.02       :      2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g


Related Questions

What represents the identity of an element

Answers

Answer:

The identity of an element is its atomic number, which is the number of protons within the nucleus of one of its atoms.

Explanation:

B. Drinking water can only be obtained
hom seawater by hallaka True. I False​

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Answer:

False

Explanation:

The answers is that it’s False

Find the kinetic energy of a 5kg bowling ball that is traveling 2 meters per second

Answers

Explanation:

KE = ½ mv²

= ½ x 5 x 2² joule

= 10 joule

what is 14.235 rounded to the nearest tenth​

Answers

it would end up being 14.2

Answer:

it would round down to 14.2

Explanation:

the 35 is below 50 so it goes down, and it rounds down to 14.2 instead of, if if was, say, 14.62 then that would round up bc the decimal is higher than 50.

but since it is 235, then it rounds down to 14.2

stay safe, TPWK!

what layer of the Earth is made of liquid metal?

Answers

Answer:

the outer core

Answer:

The outer core

formal units are formed by?

Answers

Answer:

However, when formal units are used to measure length, the measurement can usually be read from a scale on a ruler or tape, which shows units of a particular size. Unit iteration involves knowledge of repeatedly placing identical tightly packing units so that there are no overlaps or gaps.

Explanation:

Which statement best describes a difference between electromagnetic waves
and mechanical waves?
A. Mechanical waves can transfer matter through empty space.
B. Electromagnetic waves vibrate in two directions that are
perpendicular to each other.
C. Mechanical waves transfer matter, not energy, from one place to
another.
D. Electromagnetic waves require empty space to transfer energy
from one place to another.

Answers

Answer:

C

Explanation:

electronic waves transmits energy but mechanical waves require a medium in order to transport their energy from bgg one place to another.

Answer:

it is B.) Electromagnetic waves vibrate in two directions that are

Explanation:

stay safe 2021

Different elements are most likely to react in similar ways when they

Answers

Answer:

Belong to the same group.

Explanation:

Different elements are most likely to react in similar ways when they belong to the same group.

This is because the elements in the same group always have similar number of valence electrons which implies that they all have the same number of electrons in their outermost shell. For example,barium (Ba), beryllium (Be), calcium (Ca), magnesium (Mg), radium (Ra), strontium (Sr) all have 2 electrons in their outermost shell and thus they belong to group 2 of elements which are known as Alkaline earth metals and they all tend to react in the same manner with other substances

The elements that has been belonging to the same group have been able to react in similar ways.

The reactivity of the elements has been based on the presence of the valence electrons. The elements that has been belonging to the same group have consisted of the same number of valence electrons with the increase in the number of shells moving from left to right.

Thus, the elements that have been belonging to the same group have consisted of the same reactive properties.

For more information about different elements, refer to the link:

https://brainly.com/question/17845581

Which compound in the picture has a central atom with four outside atoms and has at least one nonpolar bond.

Answers

Answer:

The answer is:

B

Explanation:

The compound in Option B is Methane.

Methane is known to be a compound which has two elements, carbon and hydrogen. It has a central atom which is surrounded by four hydrogen atoms. It's chemical formula is CH4.

Methane's outer atoms are dipoles and are in the same direction. This makes the overall molecule non-polar. The compound itself has non-polar bonds and it is non-polar itself.

Which characteristic is related to kinetic energy but not potential energy

Answers

Answer:

kinectic is movement and potential is still

Explanation:

While kinetic energy of an object is relative to the state of other objects in its environment, potential energy is completely independent of its environment. Hence the acceleration of an object is not evident in the movement of one object, where other objects in the same environment are also in motion.

Answer:an object’s speed

Explanation:

I NEED THIS ASAP PLEASEE
what is the partial pressure of nitrogen dioxide gas in psi in a sealed vessel that has a total pressure of 2558 psi and partial pressures of 54.6 bar for carbon dioxide?

Answers

Answer:

121.8bar

Explanation:

The partial pressure is the pressure a gas would exert if it were alone in the volume of the gas mixture;

 Given parameters:

  Total pressure  = 2558psi

   Partial pressure of carbon dioxide  = 54.6bar

Unknown:

Partial pressure of nitrogen dioxide gas  = ?

Solution:

  Total pressure = partial pressure of carbon dioxide + partial pressure of nitrogen dioxide gas

Let us convert from psi to bar;

           14.504psi  = 1 bar

           2558psi  = [tex]\frac{2558}{14.504}[/tex]   = 176.37bar

Now;

Partial pressure of nitrogen oxide = 176.37bar  - 54.6bar  = 121.8bar

Answer:

1766 psi

Explanation:

The first step is to convert 54.6 bar into psi units, which is aproximately 791.9 psi. Next, subtract that from 2558 psi and you will get about 1766 psi.

Question 1 of 10
Which describes the law of conservation of matter?
O A. The reactants must have more atoms than the products.
B. The reactants must have fewer atoms than the products.
C. Atoms change into other elements during a reaction.
D. The same atoms must be in the products and the reactants.
SUBMIT
FIRST PERSON GETS BRAINLIEST IF RIGHT

Answers

Answer:

I think is D. The same atoms must be in the products and the reactants.

Explanation:

Explanation:

DThe same atoms must be in the products and the reactants.

help me please I really need it ​

Answers

Hey There!_____________________________________Answer:_____________________________________

a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.

b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes

c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes

_____________________________________Best Regards,'Borz'

Identify the following examples as either physical or chemical change.
(Ill give brainliest if right)

Answers

Answer:

19. Physical

20. Physical

21. Chemical

22. Physical

23. Chemical

24. Chemical

25. Physical

Explanation:

how would one convert 36 yd to centimeters?

Answers

Answer:

3291.84 cm

Explanation:

you would multiply the amount of yards you have by 91.44, since that's how many centimeters there are in 1 yd.

Answer: it’s D

Explanation:

For the following problems, identify the substance as either an element, a compound, or a mixture. Write E for Element, C for compound, and M for mixture. 34. Silicon ___E__ 35. Salad dressing __M___ 36. Table Salt (NaCl) __C___ 37. Oatmeal with apples and raisins_____ 38. Lithium _____ 39. Copper Sulfate (CuSO4) _____

Answers

Answer:

Explanation:

34. E

35. M

36. C

37. M

38. E

39. C

O Previous

4 v

Next

Scientific Models and Measurements: Mastery Test

What type of scientific model does the flow chart represent?

Make

observations

Ask

questions

Construct a

hypothesis.

Repeat the

process.

Test the hypothesis with

an Investigation

Analyze the data.

Explain the

results

The hypothesis

Is true.

The hypothesis

Is not true.

Communicate

the results.

Answers

Answer:

what is scientific model

Explanation:

How do the farmers use the property of density of cranberries to harvest the crop?

Answers

Farmers use the property of density of cranberries to harvest the crop because an object with a density less than, in this case, water, it will float.

When farmers flood cranberry bogs with water, they know that cranberries have a density less than about 1 g/mL. Because of this, cranberries will float to the top of water and can be easily harvested.

2.
What did five different witnesses see in the area where Mary Lou Arruda
disappeared?
A. Mary Lou talking to an unknown man.
B. A green car driven by an unknown man.
C. Mary Lou's bicycle in the trunk of a green car.
D. An unknown man on foot following Mary Lou .

Answers

Answer:

c

Explanation:

I believe its c but i could be wrong sorry if I am

Which part of project management involves determining possible risks?

Answers

Answer:

Resources

Explanation:

Answer:

Explanation:

M

When 50.0 mL of 1.000 M HCl is reacted with 50.0 mL of 1.000 M NH4OH, the solution's temperature increases 8.65 °C. Calculate qsolution in units of kJ. The specific heat of the salt solution is 4.184 J/g-°C and the density is 1.010 g/mL.

Answers

Answer:

Explanation:

Total volume of solution = 100 mL .

Total mass of the solution = 100 x 1.01 g

= 101 g

specific heat of solution = 4.184 J/g-°C

rise in temperature = 8.65  °C

heat released = mass x specific heat x rise in temperature

= 101 x 4.184 x 8.65

= 3655.35 J

= 3.655 kJ .

qsolution = 3.655 kJ .

What is the concentration of hplus ions at a ph=11

Answers

Answer: 10^-11

Explanation:

to find the concentration of H+ ions given the ph, we use the formula 10^(-pH).

so 10^-11

You have 16.6 g of water at 40.2 C. How many Joules are needed to warm the water to 44.8 C?

Answers

Answer:

Q = 319.49 J

Explanation:

Given that,

Mass, m = 16.6 g

Initial temperature, [tex]T_i=40.2^{\circ} C[/tex]

We need to find the heat needed to warm the water to 44.8 °C. The formula that is used to find the heat required is given by :

[tex]Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q=16.6\ g\times 4.184\ J/g^{\circ} C\times (44.8-40.2)^{\circ} C\\\\Q=319.49\ J[/tex]

So, 319.49 J of heat is needed to warm water.

2. The ions in an ionic compound separate from each other when
A. dissolved in water
B. when melted
C. when conducting electricity
D. never

Answers

Answer:

A. when dissolved in water

Explanation:

Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds

Answer:

ions do separate in an ionic compound because there is the free flow of electrons in the oppositely charged ions and conducts electricity in an aqueous form

What do you think happens to Difluoroethane at –24°C? Provide evidence to support your claim.

Answers

Answer:

The following subsections explain the explanation according to the particular circumstance.

Explanation:

The boiling point seems to be the temperature beyond which the working fluid as well as the boiling phase would be at a predetermined pressure or voltage at equilibrium among one another and.  The vapor or boiling temperature of 1,1 difluoroethane seems to be -25oC at 1 atm, although as a gas it can remain at a higher temperature around -24oC.

In coastal ecosystems as sea otters populations decline sea urchins populations

Increased
Decreased
Remained the same
None of the above

Answers

Decreased I believe

What is the importance of activity series?​

Answers

The activity series of metals is an empirical tool used to predict products in displacement reactions and reactivity of metals with water and acids in replacement reactions and ore extraction. It can be used to predict the products in similar reactions involving a different metal.

What does an increase of 1 pH number represent?​

Answers

Answer:

A one-point pH change indicates the strength of the acid or base has increased or decreased tenfold; a 2-point change indicates a 100-fold change in acidity or alkalinity, and a 3-point change in pH indicates a 1000-fold change. Examples: • An increase in pH from 7.0 to 8.0 means the water is 10 times more basic.

Explanation:

PLEASE HELP ME!!!
THE CHEM QUESTION IS...

Calculate the amounts of heat required for 25.0 g of water to change from 10°C to 30°C

Answers

Answer:

1045

Answer: 1045 J of energy was released on cooling the down the water from 20 °C to 10 °C.

Answer:

..............=2100

4. Hot material in the Earth's mantle rises and cool material
sinks. This is an example of

a. conduction
b. convection
c. radiation
d. none of these

Answers

Answer:

Th answer is b. convection.

Explanation:

As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.

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