8)
What mass of hydrogen is needed to react with 32 g of copper oxide?
CuO + H2 → Cu + H2O

Answers

Answer 1

Answer:

1.22gram of hydrogen is needed to react

Answer 2

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore,  0.40 g mass of hydrogen is needed to react with 32 g of copper oxide.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

CuO + H[tex]_2[/tex]→ Cu + H[tex]_2[/tex]O

mole of copper oxide=  32 /79.54

                                    =0.40 mole

The mole ratio between copper oxide and hydrogen is 1:1

mole of hydrogen= 0.40 mole

mass of hydrogen = 0.40 mole×1g/mol

                              = 0.40 g

Therefore, 0.40 g mass of hydrogen is needed to react with 32 g of copper oxide.

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Related Questions

20. At STP, an element that is a solid and a
good conductor of heat and electricity
could have an electron configuration of
(1) 2-7
(2) 2-8-8
(3) 2-8-5
(4) 2-8-18-2
20

Answers

Answer:

4

Explanation:

Zinc

the balloon was filed with perfume. How did the fragrance get out from the balloon? Name the process occured??​

Answers

Answer:

what tell me in your mojule

Explanation:

mmmmm

When Newton started studying gravity, the concept of gravity was already in place.
A. True
B. False

Answers

True I hope this helps

Are crystals of different soluble solids similar?​

Answers

Crystals of different soluble solids  are not similar because they are  amorphous and   therefore  do not have definite crystals.

What are crystal solids?

A crystalline solid is a homogeneous solid in which the constituent particles, atoms, ions or molecules are arranged in a definite repeating pattern.

Most of the solid substances are crystalline in nature. The arrangement of particles in a crystalline solid is such that the total intermolecular force of attraction is at maximum.

Factors in which solubility depends are temperature, pH, and ionic strength.

Crystals of different soluble solids are not similar as they do not have definite crystals.

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(what is the meaning of aids?) (what is the meaning of cushions?) (name 5 citrus fruits) ( what are antibodies?) (what are hormones?)​

Answers

Answer:

Aids mean

a disease in which there is a severe loss of the body's cellular immunity, greatly lowering the resistance to infection and malignancy.

Cushions mean

a swollen floral system on which several small flowers are borne.

sweet mangogrape fruitpineapplelimelemon

What are antibodies

this is a blood protein produced in respond to an counteracting a antigen.

What are hormones

these are chemicals that the body releases during a period of time

Explanation:

what type of bond is between H2?

Answers

Explanation:

covalent bond enjoy your anseer

"Which type of reaction is used to measure immune complex formation almost immediately after reagent has been added by the amount of light scattered at a particular angle"

Answers

Answer:

nephelometry

Explanation:

Please mark as brainliest if this helped you

How long does it take for eggs to get to room temperature

Answers

Takes 30 mins for the egg to reach room temperature


What happens to the speed of the particles of the physics book?

Answers

Answer:

the physics book particales speed up and when you move the chemistry book

Answer:

The speed of the particles of the physics book increases when the chemistry book slides across the physics book.

Explanation:

i got it right when i did this

Hey guys! How is the answer C? I need steps plz

Answers

So basically the answer is c bc if your dividing then multiplying you’d boils get your answer

hi. can you help me ​

Answers

1. Hydrogen, 1, 1 and 1
2. Helium, He, 4, 2 and 2
3. Beryllium, 4, 5 and 5
4. Nitrogen, 7, 14 and 7
5. Neon, 10, 20 and 10
6. Aluminum, 13, 27 and 13
7. Sulfur, S, 16, 16 and 16
8. Boron, B, 5, 6 and 5
9. Oxygen, O, 8, 16 and 8
10. Sodium, 11, 12 and 11
11. Silicon, Si, 14, 14 and 14
12. Chlorine, 17, 35 and 17
13. Lithium, Li, 3, 7 and 3
14. Carbon, C, 6, 6 and 6
15. Fluorine, 9, 9 and 10
16. Magnesium, 24, 12 and 12
17. Phosphorus, 15, 31 and 15
18. Argon, Ar, 40, 18 and 18
19. Calcium, 20, 40, 20, 20 and 20
20. Potassium, K, 19, 39, 19, 20 and 19

Hope it helps, the element names are to help you with locating it, the numbers are to fill in.

11.Three atoms of element X react with an element(s) Y from group VIA. What
would be the chemical formula between X and Y.

Answers

Element “X” belongs to family 2A, meaning it is part of the family that includes elements such as Be and Mg. These elements will all have 2 valence electrons and can be represented by the following Lewis diagram:

Element “Y” belongs to family 5A, meaning it is part of the family of elements that includes elements such as N and P. These elements will all have 5 valence electrons and can be represented by the following Lewis diagram:

Atoms from these two families will usually react with each other by losing or gaining valence electrons to create stable ions (an ion is what we call an atom/particle that has a charge). These stable ions form by the atoms either losing or gaining electrons until they have the same number of valence electrons as the nearest Noble Gas. This means that each ion will have a full valence shell (usually consisting of 8 electrons), often referred to as a “stable octet”, and this process of creating stable ions is often called the “octet rule”.

Atoms with fewer that 4 valence electrons will normally have a weak hold on their valence electrons and will tend to lose their valence electrons when forming ions.

Atoms with 4 or more valence electrons will normally have a strong hold on their valence electrons and will tend to gain electrons when forming ions.

The charge on the ion arises from the fact that, initially, the atom is electrically neutral because it has the same number of electrons (negative charges) as protons (positive charges). By losing electrons, the atom will end up with more protons (positive charges) than electrons (negative charges) and will form an ion with an overall positive charge. By gaining electrons, the atom will end up with more negative electrons than positive protons becoming an ion with an overall negative charge.

So, an atom of element “X”, with only 2 valence electrons, must lose its 2 valence electrons (which will be gained by element “Y”) to form a stable ion with a 2+ charge (losing two electrons leaves the ion with 2 more positive charges (protons) than negative charges, so a net charge of 2+).

An atom of element “Y”, with 5 valence electrons, must gain 3 electrons (from element “X”) to form a stable ion with a 3- charge (gains 3 extra negative charges).

We can show this process using Lewis diagrams:

From this set of diagrams you can see that in order to create stable ions of both “X” and “Y” we need these atoms to react with each other in a 3:2 ratio (we need 3 atoms of X for every 2 atoms of Y). This means that the resulting chemical formula of the compound will be:

Now, we will look at a short cut that can help you figure this out without having to draw Lewis diagrams.

Compounds are electrically neutral, meaning they must contain equal numbers of positive and negative charges. For compounds consisting of oppositely charged ions, this means that the total charge of the negative ions must be equal to the total charge of the positive ions. In other words the ions must combine in a ratio that makes their charges add to zero.

If we look at the compound we just made, X3Y2, we can confirm this:

So, now you can you predict the formula of simple ionic compounds:

from the family of elements, determine the number of valence electrons each element has

determine the charge of the ions that each atom will form using the octet rule (or look on the periodic table, most will tell you the stable ionic charges that each element can form)

determine the ratio of positive ions to negative ions that results in an overall charge of zero

Example,

What is the formula of a compound produced when an element from family 3A combines with an element from family 7A?

A precious metal is _________________ a. An element with super and electric and thermal conductivity, high luster, and sensitivity. B. A highly sought after dense, shiny, soft precious metal that has been used as money for many centuries. C. An highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity. D. A soft, sensitive, and lustrous element with the highest conductivity of any element. Please select the best answer from the choices provided A B C D.

Answers

Answer:

c.

an highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.

Explanation:

A precious metal is a highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity, hence option C is correct.

How precious metal is differed from the base metal?

Rare metallic chemical elements with a high economic value are known as precious metals. The valuable metals are often less reactive chemically than most elements.

Iron-free metals and alloys are not considered base metals. Base metals have a propensity to tarnish, oxidize, or corrode with time or when exposed to the environment, in contrast to valuable metals.

Base metals typically cost less than precious metals since they are more plentiful in nature and sometimes easier to mine.

Therefore, a precious metal is a highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.

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Which process requires water to gain heat energy from th
environment?
O condensation
O evaporation
infiltration
precipitation

Answers

Answer:

Evaporation, please mark me Brainliest

Elige la respuesta que mejor describe cómo difieren el Monte Everest y el Valle de la Muerte.
El Monte Everest es plano y el Valle de la Muerte es el punto más alto de la Tierra.
O El Monte Everest es el punto más alto de la Tierra, y Death Valley es una montaña más pequeña.
El Monte Everest es el punto más alto de la Tierra, y el Valle de la Muerte es relativamente plano.

Answers

Answer:

El Monte Everest es el punto más alto de la Tierra, y el Valle de la Muerte es relativamente plano.

Explanation:

Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.

Answers

Answer:

see explanation

Explanation:

Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.

Ag (+1) + NO3(-1) + 2 Na(+1) + Co3 (-2)--> Ag2CO3 (s) + 2 Na (+1) + 2NO3(-1)

Which are characteristics of matter? (Select all that apply)

A. Created from mixtures

B. Takes up space

C. Makes up atoms

D. Has mass

Answers

Answer:

B and D.

Explanation:

Matter takes up space and has mass.

Answer:

B and D

Explanation:

It is because matter is anything that has mass (weight) and can occupy space

Metals usually lose electrons
and become

Answers

Answer:

A positive ion

Explanation:

when an atom losses an ion it become positive while when an atom gains an atom it becomes negative

The process of burning means to react a substance with:

Answers

it’s oxygen i’m pretty sure

define pure substance​

Answers

A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.

Explain why oxygen relights a glowing splint?​

Answers

Answer:

Oxygen gas relighting a glowing splint. The oxygen gas is produced by the decomposition of hydrogen peroxide, which is squirted into a test tube containing the decomposition catalyst manganese (IV) oxide. When the glowing splint is introduced to the test tube, it bursts back into flame when it contacts the oxygen.

Explanation:

hope its help

Oxygen relights a glowing splint due to its role as a strong oxidizer. When a glowing splint is inserted into an environment containing oxygen, it triggers a rapid combustion reaction.

Oxygen readily reacts with the fuel source on the splint (typically carbon compounds), providing the necessary oxygen molecules for the combustion process.

This exothermic reaction releases heat and light energy, causing the splint to re-ignite.

Oxygen's ability to support combustion is vital for many natural processes and industrial applications, as it enables the release of energy stored in various substances, highlighting its importance in sustaining life and various chemical reactions.

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During an experiment, a canister filled with hot water was added to a beaker filled with cold water. In which direction did the heat energy move?
A) The heat energy moved from the hot water of the canister into the cold water of the beaker.
B) The heat energy moved from the cold water of the beaker into the hot water of the canister.
Equal amounts of heat energy from each container moved in both directions
D) No heat energy moved, as it all remained in the canister of hot water.

Answers

Answer:

A

Explanation:

As  per the concept of thermal energy, heat energy will be moved from hot water of canister to cold water of beaker as heat flows from point at high temperature to point at lower temperature.

What is thermal energy?

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.

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A species acts as a(n) _____ agent if it gains electrons in a half-reaction. Conversely, it could potentially act as a(n) _____ agent if it loses electrons in a half-reaction.

Answers

A species acts as an oxidizing agent if it gains electrons in a half-reaction. Conversely, it could potentially act as a reducing agent if it loses electrons in a half-reaction.

REDOX REACTION:

Redox (oxidation-reduction) reaction is a type of reaction that involves the loss and gain of electrons by substances involved.

Redox reaction involves a reducing agent and an oxidizing agent. Oxidizing agent gains electrons in a redox reaction while reducing agent loses electrons.

Oxidizing agent gets reduced in the process while reducing agent gets oxidized.

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How many silicon atoms are in a typical computer microchip (0.001 g of silicon)?

Answers

The number of silicon atoms in atypical computer chips(0.001g of silicon) is 2.14 × 10¹⁹ atoms

The atomic mass of silicon = 28.0855 amu

Using the mole concept that 1 mole = 6.022  × 10²³.

This number is called the Avogadro's number.

Therefore,

1 mole /  28.0855g  of silicon contains 6.022  × 10²³ atoms of silicon

0.001 g will contain ? atoms of silicon

cross multiply

number of atoms of silicon = 6.022  × 10²³ × 0.001 / 28.0855

number of atoms of silicon = 6.022 × 10²⁰ / 28.0855

number of atoms of silicon = 2.14 × 10¹⁹ atoms

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Complete the sentence. When a base is added to water, hydrogen ions __________.

Answers

Answer:

Explanation:

Decreases

Answer:

Hydrogen ions decrease. It reduces the concentration of ions.

Explanation:

What is the concentration of a solution containing 1.0 g of sodium hydroxide in 250 cm³ of solution?

A- 0.025 mol/dm³
B- 0.10 mol/dm³
C- 0.25 mol/dm³
D- 1.0 mol/dm³​

Answers

Answer:

Correct option is

D-1.0mol/dm³

Mass of NaOH (m) = 1g

The volume of water (V) = 250 ml

Mol. wt of NaOH (m) = 40g/mol

Molarity (M) =M×V(ml)m×1000

M=40×2501×1000

M=101 or 0.1 M

what are the only elements that exist in nature as uncombined

Answers

Answer:

The noble gases (Argon, Neon, Xenon, Helium, Krypton, Radon)

An alkyne with the molecular formula C5H8 was reduced with H2 and Lindlar's catalyst. Hydroboration-oxidation of the resulting alkene afforded a primary alcohol. What is the IUPAC name of the alkyne starting material

Answers

Since the addition of the H2O in the last step of hydroboration is anti-Markovnikov, the starting material is 1-pentyne.

The addition of H2 to C5H8 yields an alkene when a Lindlar catalyst is used. Recall that the Lindlar catalysts poisons the process so that the addition do not go on to produce an alkane.

When hydroboration is carried out on the alkene, we are told that a primary alcohol was obtained. We must note that in the last step of hydroboration, water is added in an anti- Markovnikov manner to yield the primary alcohol. Hence, the starting material must be 1-pentyne as shown in the image attached.

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how many ounces in a small can of crushed pineapple?

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Crushed Pineapple in 100% Pineapple Juice 8 oz can.

Hope it helps!

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A car travels 76 km/hr for 11 hours. How far did the car travel in this time period (in kilometers)?

Answers

Answer:

836 km

Explanation:

76*11=836

Answer:

836km

Explanation:

76km/hr = 76×1000÷3600= 190/9 m/s

11hours =39600 s

Distance=speed×time

Distance=190/9 × 39600= 836,000m

So distance is 836,000m or 836 km.

This method is possible only if body is moving linearly and the velocity is constant.

If there is uniform acceleration use Newton's laws of motion.

If is acceleration is varying then use calculus methods.

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