Chemistry High School


How many moles of hydrogen gas
are produced when 3.8 moles of HCI
are reacted?
O 1.9 mol

How Many Moles Of Hydrogen Gasare Produced When 3.8 Moles Of HCIare Reacted?O 1.9 Mol

Answers

Answer 1
1.9 mol H2.
3.8 mol HCl * (1 mol H2 / 2 mol HCl) = 1.9 mol H2

Related Questions

____CO + ____H2 ----> ____C8H18 +____H2O

Answers

8CO+9H2 —> 1 C8H18+9H2O

Calculate the number of moles found in 3.045x1024 atoms of helium.

PLS HELP

Answers

Explanation:

so for this u have to use this equation where

Moles = number of particle/6.02×10^23

= 3.045 × 10^24/6.02×10^23

= 5.0581

write it to 3 S.F so 5.06 moles

proper significant figure: 27.01 + 14.369

Answers

Answer:

put the bigger number on top then add

Explanation:

41.369

What can be different between the products and reactants in a balanced chemical equation?

Answers

Answer:Reactants are starting materials and are written on the left-hand side of the equation. Products are the end-result of the reaction and are written on the right-hand side of the equation.

Explanation:

The reactants in a balanced chemical reaction are the starting material which reacts together to give the products in by the regrouping of atoms in the reactants.

What is a balanced chemical equation?

The balanced chemical equation of a reaction represents the perfect stoichiometry of each reactants and products with their states of matter in brackets.

In a balanced reaction, the number of each element in the reactant side must be equal to their number in the product side. The number of each elements and groups in a reaction can be balanced by multiplying with suitable integers.

The atoms in the reactants are regrouping to form the products. Thus, the identity of  the new products is entirely different form that of reactants in the reaction.

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A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide,
oxygen, and nitrogen. Which term most likely describes what she is measuring?
O final pressure
O atmospheric pressure
O combined pressure
O partial pressure

Answers

Answer:

D. Partial pressure

Explanation:

Partial pressure is the individual pressure exerted by each gas present in a gaseous mixture. As he is measuring the pressure of each gas in the atmosphere separately, so PARTIAL PRESSURE is the exact term for his measurement.

What is the fixer solution equation?

Answers

Answer:

Fixation involves these chemical reactions (X = halide, typically Br−): AgX + 2 S2O32− → [Ag(S2O3)2]3− + X. AgX + 3 S2O32− → [Ag(S2O3)3]5− + X. In addition to thiosulphate the fixer typically contains mildly acidic compounds to adjust the pH and suppress trace amounts of the developer.

Identify the limiting reactant when 2.20 g of calcium reacts with 4.5 g of chlorine gas to produce calcium chloride. Write a balanced equation before starting.

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Answers

Answer:

2.20*4.5=?? you have to solve the multiplication ok, or its not learning

Explanation:

Which combinations of particles form ionic bonds/compounds?

Answers

Answer:

Iconic bond is formed by cation and anion. A compound is made when atoms of two or more elements bond in a chemical reaction.

Explanation:

HELPPPP ASAPP 10 POINTS

Answers

Constructive interference. Constructive Interference occurs when the maxima of two waves add together to create a wave maxima of the two individual waves combined.

A nebula is often made up of hydrogen and helium gases.
True
False

Answers

Answer:

Nebulae are made of dust and gases—mostly hydrogen and helium. ... Eventually, the clump of dust and gas gets so big that it collapses from its own gravity. The collapse causes the material at the center of the cloud to heat up-and this hot core is the beginning of a star.

Explanation:

Hope this helps

What is the pOH of a solution that has a pH of 2

Answers

pOH is 12.
Explanation:
The pOH + pH has to equal 14
Since we know pH, you do:
pOH = 14-pH
pOH = 14-2
pOH = 12

The [H+] is 0.001 M. What is the pH?

Answers

Hopes this helps:

Answer: So the pH of the solution is 4.

Which type of reaction does an element replace an ion in a compound, forming a new compound and new element?

a
Synthesis
b
Decomposition
c
Single Replacement
d
Double Replacement
e
Combustion

Answers

Answer:

The answer is c . Single Replacement

Explanation:

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

Water absorbs energy when it undergoes___
A. freezing
B. deposition
C. condensation
D. melting

Answers

Water absorbs energy D. Melting

Answer:

d. melting

As heat enters the water the particles move much faster, bumping into each other. Therefore, more heat means more energy!

Hopesthis helps!

An atom has 23 protons and 24 neutrons. Write both its NAME and it's SYMBOL using isotope notation.

Answers

Answer:

Vanadium is the name and the symbol is V #23

Explanation:


Marie Curie's work with radioactive materials eventually lead to her death. At the age of 66, what
disease did Madame Curie die from?

Answers

Answer:

Radiation-induced Luekimia

Explanation:

They worked with many radioactive elements, so it caused Leukemia which is

a  disease in which the bone marrow and other blood-forming organs produce increased numbers of immature or abnormal leukocytes.

Hoped this helped

Bacteria live on skin of humans. The bacteria receive food and shelter form human beings. Most bacteria are harmless and pose little or no threat to humans. This is an example of

Answers

Answer: symbiotic relationship

Explanation:

How many moles of gallium chlorate, Ga(ClO3)3, must react in order to produce 674 kJ of energy according to the following reaction? 2 Ga(ClO3)3 à 2 GaCl3 + 9 O2 DH = - 130.4 kJ

Answers

Answer:

10.3 mol Ga(ClO₃)₃

Explanation:

Let's consider the following balanced thermochemical equation.

2 Ga(ClO₃)₃(s) ⇒ 2 GaCl₃(s) + 9 O₂(s)  ΔH = - 130.4 kJ

According to the balanced thermochemical equation, 130.4 kJ of heat are released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:

674 kJ × 2 mol Ga(ClO₃)₃/130.4 kJ = 10.3 mol Ga(ClO₃)₃

Thermochemical equations are chemically balanced equations that take into account both the energy change and the physical states of all reactants and products. Energy is a reactant in an endothermic process, whereas it is a product in an exothermic reaction. Here the moles of Ga(ClO₃)₃ is  10.3 mol.

Let's consider the following balanced thermochemical equation.

2Ga(ClO₃)₃(s) ⇒ 2GaCl₃(s) + 9O₂(s)  ΔH = - 130.4 kJ

According to the balanced thermochemical equation, 130.4 kJ of heat is released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:

674 kJ × 2 mol Ga(ClO₃)₃ / 130.4 kJ = 10.3 mol Ga(ClO₃)₃

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A pacemaker:
A. sends electrical impulses to a prosthesis, causing it to move
through brain signals.
B. measures the distance traveled with a prosthetic leg.
C. tracks the speed traveled with a prosthetic leg and adjusts
movements accordingly.
D. sends electrical impulses to the heart, causing it to beat more
regularly
SUEMIT

Answers

Answer: D. Sends small electrical impulses to the heart, causing it to beat more

Explanation: A pacemaker is implanted in the chest and helps to treat abnormal heart rhythms especially those causing your heart to skip beats or beat too slow.

what is the name of this molecule?
A. 2-pentyne
B. cis-2-pentene
C. 3-methylpentane
D. Pentane

Answers

It’s pentane because it’s understandable underlining the

As the compound has alkyne as the functional group the correct option is A.

Functional group is defined as a substituent or a group of atoms or an atom due to which chemical reactions are carried out. Each functional group will react in the same way regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group is increased by making modifications in the functional group .Atoms that  are present in functional groups are linked to each other by means of covalent bonds.They are named along with the organic compounds according to IUPAC nomenclature.

As the compound has alkyne as the functional group the correct option is A.

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Add coefficients to balance the equation to make water.
H2(g) +O2 (g)H20 (1)

Answers

Answer:

2H2+2O2=2H2O

Explanation:

hope this helps

Which of the following statements is FALSE? *

a.Smog is a phenomenon brought about by natural events.

b.Forest fires may be caused by human activities or by natural events.

c.Volcanic eruptions may contribute large amounts of pollutants to the atmosphere.

d.Under normal condition, the greenhouse effect maintains a temperature that support life on Earth.​

Answers

Answer:

A:smog is a phenomenon brought about by natural events

Explanation:

false because of how phenomenon it is smog did not bought phenomenon and natural events!!

DOES THIS HELPFUL?

7. Which type of electromagnetic radiation can be dangerous to living things?
a. Radio waves
b. Visible light
c. Gamma rays

Answers

the answer would be b.
C gamma rays
Because they have the highest frequency

Write the molecular formula of poly(glycine)

Answers

Answer:

C2H5NO2

Explanation:

Glycine | C2H5NO2 - PubChem.

weight of glycine= 75.07 g/mol

A 45.2 g sample of Silver at 101.0 ºC is dropped into 300.0 g of water at 30.6 ºC. What is the final temperature of the water?

Answers

Answer:

Final temperature of water = 31.2° C

Explanation:

Let the final temperature of water be T degrees

Concept: By energy conservation law

Heat lost by the silver = heat gained by water

Heat lost be silver Q1 = m1c1ΔT1

Q1 = 45.2/1000Kg×2.36J/KgK×(101-T)

Heat gained by water Q2 = m2c2ΔT2

Q2 = 300/1000Kg×4.186J/KgK(T-30.6)

Since, Q1=Q2

⇒  45.2/1000Kg×2.36J/KgK×(101-T) = 300/1000Kg×4.186J/KgK(T-30.6)

Solving we get T = 31.2° C

Therefore, final temperature of water = 31.2° C

help me with bellwork​

Answers

Answer:

1. PE

2. KE

3. PE

4. KE

5. KE

6. PE

7. KE

8. KE

9. PE

10. PE

Explanation:

Think about it this way, potential energy is stored energy while kinetic energy is active energy.


What is the pOH of a solution with [OH-] = 1.4 x 10-13?
O A. -13.15
B. 14.00
C. 12.85
D. 13.15

Answers

Answer:

C. 12.85

Explanation:

just did

What is the frequency of an X-ray that has a wavelength of 1.5 x 10 -9 m? The speed of electromagnetic radiation is 3.0 x 10 8 m/s. [v = λƒ]

Answers

Answer:

2.0x10¹⁷ Hz is the frequency of the X-ray

Explanation:

We can find the frequency of a wave of energy from the wavelenght and its speed using the formula:

v = λƒ

Where v is speed (For electromagnetic radiation = 3.0x10⁸m/s)

λ is the wavelength in meters = 1.5x10⁻⁹m

And f is the frequency in s⁻¹ = Hz

Replacing:

3.0x10⁸m/s = 1.5x10⁻⁹m*ƒ

3.0x10⁸m/s / 1.5x10⁻⁹m = f

f =

2.0x10¹⁷ Hz is the frequency of the X-ray

How does renal regulation at the kidneys work in removing acid and restoring equilibrium

Answers

Answer: The kidneys help maintain the acid–base balance by excreting hydrogen ions into the urine and reabsorbing bicarbonate from the urine.

Explanation:

1.Peptide bond formation is accomplished as the amine nitrogen of the an-tRNA in the ____ carries out a _____ of the amino acid bound to the _____. a.A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site b.P site, nucleophilic attack on the carbonyl carbon, tRNA of the A site c.A site, acidophilic attack on the carbonyl carbon, tRNA of the P site d.A site, electrophilic attack on the carbonyl carbon, tRNA of the P site e.P site, electrophilic attack on the carbonyl carbon, tRNA of the A site

Answers

Answer:

A

Explanation:

A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site

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