Chemistry High School

Which of the following equations is balanced?
a) HgO -> Hg + 02
b) 2Mg + C12 --> MgCl2
c) P4 + 402 - 2P205
d) 2AgNO3 + CaCl2 --> 2AgCl + Ca(NO3)2
e) None of the above​

Answers

Answer 1

Answer:

a

Explanation:

a because a

Related Questions

helooo i need help please :)

Answers

It is a ,d and c just make sure tho

Elements are organized on the table according to their _____________ ___________ , usually found near the top of the square.

Answers

Answer:

atomic number

Explanation:

Elements are organized on the table according to their atomic number, usually found near the top of the square.

Answer:

by their atomic number

hope this helped

The genetic information found in DNA, chromosomes, and determines
A. the traits of the organism
B. the organism as an animal
C. the safety of the nucleus
D. the type of cell

Answers

Answer:

a

Explanation:

the traits of the organism

True or false: Heterotrophs need to go find and eat food.?


:FALSE

:TRUE

Answers

Answer:

Explanation:

Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers. Consumers include all animals and fungi and many protists and bacteria. They may consume autotrophs or other heterotrophs or organic molecules from other organisms

8. The most common element used in nuclear fission reactors is uranium. The three nuclides, U-233, U-235, and U-238, are isotopes of uranium because they have the same number of protons per atom and...*
(1) the same number of electrons per atom
(2) the same number of neutrons per atom
(3) a different number of electrons per atom
(4) a different number of neutrons per atom​

Answers

Answer:(D) different number of neutrons per atom

Explanation: Honestly, I just looked it up on Socratic.

PLEASE HELP!! Is this an element or compound?
copper (ll). oxide (CuO)
Please hurry!!

Answers

Answer: Compound

Explanation:

Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper, the other being Cu₂O or copper(I) oxide. As a mineral, it is known as tenorite.

Yes
OO
No
Balanced or Not Balanced? *
2 NaCl + 2 F2 → 2 NaF + 1 C12
Yes
No

Answers

Answer:

No, not well balanced

Explanation:

2Nacl+F2=2Naf+Cl2

PLEASE HELP ASAP
During convection heat is transferred through fluids. Which statement is true about fluids?

Only gasses are fluids
Only liquids are fluids
Only solids are fluids
Both liquids and gasses are fluids

Answers

both liquids and gasses are fluids is the answer

A certain first-order reaction has a half-life of 20.0 minutes. How much time is required for this reaction to be 75% complete?

Answers

Answer:

X = 2

Explanation:

As you know, the rate of a first-order reaction depends linearly on the concentration of a single reactant. The rate of a first-order reaction that takes the form

Which group of microorganisms has the ability to mutate?

Answers

I think it’s viruses .

Name the 3 steps involved in the treatment of polluted water? class 7​

Answers

Explanation:

The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and coagulation, and biological processes such as slow sand filtration

What do properties of matter tell us about a substance?

Answers

Answer:

Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change. It is quite difficult to define a chemical property without using the word "change"

Explanation:

Which diatomic molecule (H2, N2 or O2) forms the strongest bond and why

Answers

Answer:

Hydorgen will.

Because hydrogen has 1 as valency.

Which of the following could not be an empirical formula? a CH4 b Na2O c NaCl d H2O2

Answers

Answer:

C NaCl will not be an empirical formula.

Answer:

C naCl

Explanation:

it wouldnt be an empiricla formula

Calculate the number of moles of gas that occupy a 16L container at a pressure of 3 atm and a temperature of 48oC

Answers

Answer:

1.81

Explanation:

3*16=n(0.0821)(48+273)

what is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?

Answers

Answer:

4.03 g

Explanation:

The mass in grams of the hydrogen gas is 4.0 g

Stoichiometry

From the question,

We are to determine the mass in grams of the hydrogen gas.

First, we will determine the number of moles of hydrogen gas present.

Using the formula,

[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]

From the given information,

Number of hydrogen molecules = 1.204 × 10²⁴ molecules

Thus,

Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]

Number of moles of hydrogen gas present = 2 moles

Now, for the mass of the hydrogen gas

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Then,

Mass of the hydrogen gas = 2 × 2.016

Mass of the hydrogen gas = 4.032 g

Mass of the hydrogen gas ≅ 4.0 g

Hence, the mass in grams of the hydrogen gas is 4.0 g

Learn more on Stoichiometry here: https://brainly.com/question/2861244

Which salt is the most common found in ocean water?

magnesium


calcium carbonate


potassium


sodium chloride

Answers

Answer:

Sodium chloride

Explanation:

There are several salts in seawater, but the most abundant is ordinary table salt or sodium chloride (NaCl). Sodium chloride, like other salts, dissolves in water into its ions, so this is really a question about which ions are present in the greatest concentration. Sodium chloride dissociates into Na+ and Cl- ions.

D sodium chloride sodium is salt

Balance the equation by typing in the correct coefficients into the blank spaces in front of each formula. Type 1 if
the coefficient is 1, do not leave space blank
_EH + _ G2 → _EG + _HG2

Answers

Answer:

2 in front of every one

Explanation:

HOPE IT HELPS

Why is think chemistry is important? i need 5 paragraph please

Answers

Answer:

because it is so fundamental to our world . chemistry plays a role in everyone lives.

It touches almost every aspect of our existence in some way.

Chemistry is essential for meeting our basic needs of food, cloth, etc.

Chemistry plays a important and useful role towards the development and growth of industries.

chemistry also helps you become who you want to be.

The unique shape of DNA allows what

Answers

Answer: to copy itself during cell division

Explanation:

In a given population, which members are most likely to survive and produce offspring?

Answers

Answer:

Those individuals with advantageous traits are more likely to survive and reproduce. The survivors pass down these advantageous traits to their offspring.

Explanation:


Which system is responsible for the production of red blood cells?

Answers

hormone erythropoietin (EPO) is responsible for the production of red blood cells.

the answer is the EPO system

On the periodic table, in which period is copper?

Answers

Answer:

At the top of Group 11 above silver and gold.

Period 4

Explanation:

P5-F2 + Ar --> ArF3
P5a- How many moles of F2 (Fluorine) are needed to produce 9 mole of ArF3 (Argon trifluoride)?
P5b- How many moles of Argon (Ar) are consumed in a reaction that consumes 5 moles of F2 (fluorine)?


I need the answers for the p5 part please help

Answers

Answer:

5a. 13.5 moles of F₂

5b. 3.33 moles of Ar.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3F₂ + 2Ar —> 2ArF₃

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar to produce 2 moles of ArF₃.

5a. Determination of the number of mole of fluorine, F₂, needed to produce 9 moles of ArF₃.

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of ArF₃.

Therefore, Xmol of F₂ will react to produce 9 moles of ArF₃ i.e

Xmol of F₂ = (3 × 9)/2

Xmol of F₂ = 13.5 moles

Thus, 13.5 moles of F₂ is needed.

5b. Determination of the number of mole of Ar needed to react with 5 moles F₂.

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar.

Therefore, 5 moles of F₂ will react with = (5 × 2)/3 = 3.33 moles of Ar.

Thus, 3.33 moles of Ar was consumed.

I'LL GIVE 30 POINTS PLEASE ANSWER!!!
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome
1.

2.

3.

4.

5.

6.

Answers

1.Golgi
2. nucleus
3.Endoplasmic
4.Mitochondria
5.Ribosome
6.Lysosome

Solutions of potassium chloride and silver nitrate are mixed.

Answers

Answer:

A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.

Explanation:

:)

What is the limiting reactant if 10 moles of NH 3 react with 30.0 moles of NO ?

Answers

Answer:

NO is the limiting reactant.

Explanation:

4NH3 + 6NO --> 5N2 + 6H2O

Molar ration NH3 : NO = 10: 30 = 1: 3

Stoichiometric molar ration NH3:NO = 4:6 = 2:3

NO is the limiting reactant.

3. Which of the following do all living organisms have in common? A. Cells held up by cell walls B. The method to get water and food into their cells C. Cells are made from pre-existing cells D. Special cells that can do many different things​

Answers

C. Cells are made from pre-existing cells. :) Glad I can help

The inflation of airbags is due to the breakdown of a single chemical substance into two separate substances.

Two molecules of sodium azide (NaN3) break down into sodium (Na) and nitrogen gas (N2) during the reaction.

How many sodium (Na) atoms are produced in the reaction?

1 Na atom
2 Na atoms
3 Na atoms

Answers

Answer:

The correct answer would be

B. 2 Na atoms

Explanation:

As seen in the picture below,

Which substance would be the strongest?
carbon
steel
gold
silver

Answers

Answer:

steel

Explanation:

Answer:

B. STEEL

Explanation:

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