CHEMISTRY HIGH SCHOOL

What is water classified as

Answers

Answer 1
Answer: Water, or H2O, is a compound composed of the elements hydrogen (H) and oxygen (O).

Related Questions

A group of students were discussing the lonization energies of Selenium and Flourine. Which student is correct for the reason why their element has the highest lonization energy? O A Student C says F because the larger the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction the more energy is needed to remove a valence electron. B. Student B says Se because the smaller the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction, the more energy is needed to remove a valence electron. C. Student D says F because the smaller the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction, the more energy is needed to remove a valence electron. OD. Student A says Se because the larger the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction the more energy is needed to remove a valence electron.​
What are the components needed in order for an experiment to be valid? Identify these components in the following experiment: A scientist is testing a new plant food to see if it causes plants to grow faster. The scientist tests two plants with the new plant food, and two plants he grows without plant food.
An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope’s. Which kind of decay has occurred, and how do you know? alpha decay because alpha particles have a large mass beta decay because beta particles can have negative charge alpha decay because alpha particles have two protons and two neutrons gamma decay because gamma rays are photons
Cold packs are used to treat minor injuries. Some cold packs contain NH4NO3(s) and a small packet of water at room temperature before activation. To activate this type of cold pack, the small packet must be broken to mix the water and NH4NO3(s). The temperature of this mixture decreases to approximately 2°C and remains at this temperature for 10 to 15 minutes.State the direction of heat flow that occurs when the activated cold pack is applied to the body. Identify both types of bonds in the NH4NO3(s).
A sheet of aluminum measures 52.5 cm by 23.2 cm . if the volume is 2.95 cm3 what is the thickness of the foil?

What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution?1.81 M
201 M
5.52 M

Answers

1.       There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

 

Molarity = 612 g (1 mol / 110.96 g) / 3.04 L

Molarity = 1.81 M

1.81 M is the polarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution.

Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a(1) higher boiling point and a higher freezing point
(2) higher boiling point and a lower freezing point
(3) lower boiling point and a higher freezing point
(4) lower boiling point and a lower freezing point

Answers

The correct answer is option 2. A 0.8 M aqueous solution of NaCl has a higher boiling point and a lower freezing point than a 0.1 M aqueous solution of NaCl. This is explained by the colligative properties of solutions. For the two properties mentioned, the equation for the calculation of the depression and the elevation is expressed as: ΔT = -Km and ΔT = Km, respectively. As we can see, concentration and the change in the property has a direct relationship.

Answer:

(2) higher boiling point and a lower freezing point

Explanation:

In which of these substances are the molecules probably moving most quickly?solid iron at −45°C
solid iron at 300°C
liquid iron at 1600°C
liquid iron at 1800°C

Answers

The substance with molecules that are probably moving most quickly is liquid iron at 1800°C. This is because the particles of the liquid iron can move or slide past each other due to the small space available for movement. It cannot be compressed further due to the repulsive forces that acts between them. And also, the temperature is increases which causes for more thermal vibration of atoms.

Answer:

The answer is D

Explanation:

Which molecule is amphoteric?A.
NH4+

B.
H2O

C.
H2CO3−

D.
H2SO4

Answers

Answer:

The answer is B

Explanation:

Answer:

B. H2O

Explanation:

Well, for one example, we know that water is amphoteric... Examples: H2O can become H3O+ or OH-. HCO3- can become CO3^2- or H2CO3

Which part of the atom can be transferred from one atom to another to formions?
a. Protons
b. Neutrons
c. Valence Electron
d. Nucleus

Answers

Answer:

Explanation:  Valance Electron

Which of the following is one way to prevent the corrosion of iron

Answers

D) its the easiest and most effective.
Other Questions
Pb(NO3)2 (aq) + 2 NaI (aq) --> PbI2 (s) + 2 NaNO3 (aq)Starting with with 50.0 grams of Pb(NO3)2 and 30.0 grams of NaI:A. What is the limiting reagent?B. How many grams of the excess reactant remains?C. How many grams of each product is formed? D. If 12 grams of NaNO3 actually formed in the reaction, what is the percent yield of this reaction?
An unknown metal is very reactive; it reacts violently with water and must be stored in a moisture-free environment. It is solid at room temperature. Which group does the metal likely belong to?
Why didn't scientists know about atoms for a long time
Which of the following is not a vector?