what volume of .123 m naoh, in milliliters, contains 25.0 g of naoh? (density of the solution is 1.05 g / ml)

Answers

Answer 1

Answer:

Answer:

8.46 liters of 0.123 NaOH contains 25.0 grams of NaOH.

Explanation:

Molar is defined as Moles/Liter. 0.123 M means there is 0.123 moles of NaOH per 1 liter. We are asked to determine how many milliliters of this concentration NaOH it would take to deliver 25.0 grams of NaOH.

Use the units to guide the calculation.

Remember that: Concentration x Volume = Moles

(0.123 moles/liter)*(V) = moles

We want 25.0 grams of NaOH. Let's convert that to moles using the molar mass of NaOH:

(25.0 grams NaOH)/(24.0 g/mole) = 1.04 moles NaOH.

Now we can write:

(0.123 moles/liter)*(V) = 1.04 moles NaOH

V = (1.04/0.123) Liters

V = 8.46 liters

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Solids retain their shape and size, if kept constant temperature and pressure. At a constant temperature and pressure, liquids retain their:a. volume
b. shape
c. size
d. shape and volume

Answers

At a constant temperature and pressure, liquids retain their volume of matter.

What are the properties of matter ?

Matter is defined as total mass which occupy in space, all the physical structures are composed of matter, it can be present in three basic states such as solid, liquid, and gas.

The atoms are basic unit of matter and that make up the objects which can be visible and touched every day, the amount of matter in an object can be determined by its mass.

A physical property of matter is an independent of its chemical composition. Density, color, hardness, melting and boiling points, and electrical conductivity are the examples.

Some characteristics like density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature are some properties of matter.

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simply volume, as shape and size depend on the host container

At sea level, where the pressure was 104 kPa and temperature 21.1 ºC, a certain mass of air occupies 2.0 m3 . To what volume will the region expand when it has risen to altitude where the pressure and temperature are (a) 52 kPa, -5.0 ºC ( True or False )

Answers

Answer:

The volume of air at where the pressure and temperature are 52 kPa, -5.0 ºC is $3.64 m^3$ .

Explanation:

The combined gas equation is,

$(P_1V_1)/(T_1)=(P_2V_2)/(T_2)$

where,

$P_1$ = initial pressure of gas = 104 kPa

$P_2$ = final pressure of gas = 52 kPa

$V_1$ = initial volume of gas = $2.0m^3$

$V_2$ = final volume of gas = ?

$T_1$ = initial temperature of gas = $21.1^oC=273+21.1=294.1K$

$T_2$ = final temperature of gas = $-5.0^oC=273+(-5.0)=268 K$

Now put all the given values in the above equation, we get:

$(104 kPa* 2.0m^3)/(294.1 K)=(52 kPa* V_2)/(268 K)$

$V_2=3.64 m^3$

The volume of air at where the pressure and temperature are 52 kPa, -5.0 ºC is $3.64 m^3$ .

Which compound is used to make asphalt?

Answers

Answer:

a saturated hydrocarbon that has more than 35 carbons in its chain

Explanation: Alkanes with a chain length of approximately 35 or more carbon atoms are found in bitumen (asphalt), used (for example) in road surfacing. However, the higher alkanes have little value and are usually split into lower alkanes by cracking.

Asphalt is a biproduct of making gasoline, diesel, kerosene, jet fuel, all from crude oil pumped from the ground. Asphalt is the garbage or waste that comes out the bottom of the process of distilling those products. They heat the thick oily-sooty gunky asphalt and mix it with rock or sand and make roads out of it. So the compound would be the long hydrocarbon chains.

What are the two categories of observations? a. qualitative and quantitative b. direct and indirect c. sensory and derived d. measured and deduced

Answers

Three main approaches are available for observational research: controlled observations, naturalistic observations, and participant observations. The two categories of observation are qualitative and quantitative. The correct option is A.

The observation approach entails watching, either manually or mechanically, what people actually do or what happens when they buy or consume something. Information is gathered by watching processes in action. Observations might be either qualitative or quantitative. Scientists make both qualitative and quantitative observations to acquire knowledge.

Observations that describe something's "qualities" are referred to as qualitative observations. These wouldn't involve counting or measuring and would instead contain qualities like texture, color, and shape. Utilizing standard scales to count or measure is a requirement for quantitative observations.

Thus the correct option is A.

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The correct answer is:

qualitative and quantitative.

Explanation:

Observation is the rapid retrieval of information from a first source. In living beings, observation contracts the senses. In science, observation can also include the recording of data via the use of scientific tools. Qualitative observation is a personal process of collecting data or knowledge while quantitative observation is an objective process of accumulating data or information.

How many grams are in 1.11 moles of manganese sulfate ?