I have it attached plz help ASAP

Answer:

Molarity = 1.57 M

Explanation:

Given data:

Volume of solution = 350 mL (350 mL × 1L /1000 ml = 0.35 L)

Mass of NaCl = 32.0 g

Molarity of solution = ?

Solution:

Number of moles of solute:

Number of moles = mass/molar mas

Number of moles = 32.0 g/ 58.44 g/mol

Number of moles = 0.55 mol

Molarity:

Molarity = number of moles / volume in L

Molarity = 0.55 mol / 0.35 mL

Molarity = 1.57 mol/L

Molarity = 1.57 M

Answer:

do we have to answer all of them I'm new to this

Answer:

Molarity = 0.08 M

Explanation:

Given data:

Mass of copper sulfate = 3.8 g

Volume of water = 250 cm³  (250/1000 = 0.25 L)

Concentration of solution = ?

Solution:

Number of moles of copper sulfate:

Number of moles = mass/molar mass

Number of moles = 3.8 g/ 159.6 g/mol

Number of moles = 0.02 mol

Concentration:

Molarity = Number of moles / volume in L

By putting values,

Molarity = 0.02 mol / 0.25 L

Molarity = 0.08 mol/L

Molarity = 0.08 M

Answer:

Check explanation for answer

Explanation:

Let's analyze each reaction per separate and explain the reason of the type of reaction:

a) CH₃CH₂CH₃ + 5O₂ -------> 3CO₂ + 4H₂O

Type of reaction: Combustion

In this case, the combustion is a reaction where a compound reacts with a molecule of oxygen to produce, in almost every case, CO₂ and H₂O. Therefore, this reaction can only be a combustion. It cannot be combination because combination requires two compounds to be combined and formed, in most of the cases, one product. In this case we have two. It can be similar to a double displacement but not combination.

b) KOH + HClO₄ --------> KClO₄ + H₂O

Type of reaction: Acid base reaction, double displacement.

This is clearly an acid base reaction cause we have an acid (HClO₄) reacting with a base (KOH) to produce a salt and water. It's also a double displacement reaction, because as you can see, the atom of Potassium (K) is displacing the H, and the H displaces the K simultaneously, and form two new products.

c) CH₃CH₂OH + 3O₂ -------> 2CO₂ + 3H₂O

Type of reaction: Combustion

The reason, the same for case a).

d) CuSO₄ + ZnCrO₄ ---------> CuCrO₄ + ZnSO₄

Type of reaction: Double displacement and precipitation

In this case, it's pretty similar to case b), The Cu replaces the Zn in the CrO₄, while the Zn replaces the Cu with the SO₄. But it's also a precipitation because the CuCrO₄ that was formed is in solid state, and if the reactants were in aqueous state and a solid was formed, this means that this solid is precipitating from the reaction. Therefore, it's a precipitation reaction too.

Hope this helps

Answer: Acidity and basicity, proton concentration, the pH scale. You may have noticed that acidic things tend to taste sour, or that some basic. Since the scale is based on pH values, it is logarithmic, meaning that a change of 1 pH unit .

Explanation: PLEASE MARK ME AS BRAINLIEST

Answer:

B. 2

Explanation:

A double covalent bond is where two pairs of electrons are shared between the atoms rather than just one pair

B

A Double bond is when two atoms share two pairs of electrons with each other. It is depicted by two horizontal lines between two atoms in a molecule

Answer:

The answer is either A or C figure it out sorry

The answer is A) Something that can be observed or measured while changing the identity of the substance. C) Something that can be observed or measured without changing the identity of the substance.

A physical asset is a function of count that isn't associated with a change in its chemical composition. Familiar examples of bodily homes consist of density, coloration, hardness, melting and boiling factors, and electric conductivity.

Physical homes are those popular properties you word maximum readily approximately a substance, including its length, state of being counted (stable, liquid, or gas), color, mass, density, and power. Values for physical residences can be determined via tests that do not modify the substance being tested.

The definition of bodily is matters which are of nature or of the frame. An example of physical is plantlife developing in the ground. An example of physical is a person constrained to a wheelchair because of disabilities. A bodily exam.

Learn more about the physical property here: https://brainly.com/question/12330204

#SPJ2

Answer:

Hexaflourine Pentaiodide?

Explanation:

f = flourine (6 = hexa)

i = iodine (5 = penta) + ide

Explanation:

It will have to change its form in order for the cell to focus on developing and retaining a viable, in order to be large and narrow as in the situation of the nerve cells or to build a more 'contoured' surface, that is, to establish microvillus.

The magnesium is the anode of a magnesium and zinc galvanic cell.

The magnesium is the anode means the site of oxidation, where magnesium ions flow into solution. Here the electrons leave the electrode and flow through the voltmeter as they move to the zinc cathode.

While on the other hand, zinc is the cathode i.e. the site of reduction, where zinc ions flow onto the electrode in order to pick up electrons so we can conclude that magnesium is the anode of a magnesium and zinc galvanic cell.

Learn more about anode here: https://brainly.com/question/1172236

Answer:ANSWER IS MG(s)

Explanation:

Answer:

6.6666666667 feet per second I believe

Answer:

4.5 miles per hour.

Explanation:

30* 2= 400 feet in 1 min

24,000 per hour

5280 feet is 1 mile.

Answer: Motion, providing a burst of power that can move a specific part of the device.

Explanation: Hope this helps

Answer:

D > C > B> A

Explanation:

i solved this on study island

Answer:

precipitate

that is the answer hope that helps

Answer:

The movement of air through Earth's -- or any planet's -- atmosphere is called wind, and the main cause of Earth's winds is uneven heating by the sun. This uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

Explanation:

Answer:

An atom has a nucleus, made up protons and neutrons, which is surrounded by a cloud of electrons.

Explanation:

An atom is the smallest indivisible part of any element that takes place in a chemical reactions.

These are the fundamental building blocks of every element and even compounds.

Both protons and neutrons are located within the tiny space called nucleus at the center of an atom.

Electrons moves round in orbitals at the spaces outside of the nucleus.

Answer:

the first energy level is closest to nuclear the second energy level is a little farther away than the first

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, The energy level where an electron is located, is shown by the period on the periodic table

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

The energy level where an electron is located, is shown by the period number on the periodic table. The number of the period represents the number of orbits or shells. Shells represents the energy levels of an element.

Therefore, the energy level where an electron is located, is shown by the period on the periodic table.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ2

Answer:

good luck

Explanation:

1. false                                                                                                                          2. True                                                                                                                                3.False                                                                                        

4.true      

5.true

Answer:

1.False

2.False

3.True

4.True

5.True

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

hope this helps

Answer:+2 -2

Explanation:

Answer:

Different types of rocks have different chemical composition.

Explanation:

Rock can be distinguished from each other by their chemical composition which is a product of the minerals they contain.

Answer:

the size, shape and orientation of mineral grains

Explanation:

To describe a rock's texture, geologists determine the size, shape and orientation of mineral grains.

Texture deals with the relationship between minerals within a fine mass.

Answer:

P = 27.9 atm

Explanation:

Given data:

Mass of CO₂ = 25 g

Temperature = 25°C (25+273.15 K = 298.15 K)

Volume of gas = 0.50 L

Pressure of gas = ?

Solution:

Firs of all we will calculate the number of moles of gas,

Number of moles = mass/molar mass

Number of moles = 25 g/ 44 g/mol

Number of moles = 0.57 mol

Pressure of gas :

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

P × 0.50 L = 0.57 mol × 0.0821 atm.L/ mol.K  × 298.15 K

P = 13.95 atm.L/ 0.50 L

P = 27.9 atm

the gas mixture is at STP, what is the partial pressure of the argon?

(A) 152 torr (B) 228 torr (C) 380. torr (D) 760. torr

2.) Compared to the average kinetic energy of 1 mole of water at 0 oC, the average kinetic energy

of 1 mole of water at 298 K is

(A) the same, and the number of molecules is the same

(B) the same, but the number of molecules is greater

(C) greater, and the number of molecules is greater

(D) greater, but the number of molecules is the same

3.) If the pressure on a given mass of gas in a closed system is increased and the temperature

remains constant, the volume of the gas will

(A) decrease (B) increase (C) remain the same

4.) Which gas has approximately the same density as C2H6 at STP?

(A) NO (B) NH3 (C) H2S (D) SO2

5.) At a temperature of 273 K, a 400. milliliter gas sample has a pressure of 760. millimeters of

mercury. If the pressure is changed to 380. millimeters of mercury, at which temperature will

this gas sample have a volume of 551 milliliters?

(A) 100 K (B) 188 K (C) 273 K (D) 546 K

Get the answers to these questions

Back to the Unit 10 Old Tests Page

Back to the Unit 10 Pag

Answer:

A. 0.089

Explanation:

Hope this helps :)

Answer:

B: Oganism is gonna be the right answer for this one hope I helped

Answer:

i think is c,im not sure

Explanation: