what is the molar mass of pb(so4)2, given the following molar masses for each element: pb, 207.2 g; s, 32.06 g; and o, 16.00 g?

Answer:

Students will know that scientists find answers to questions about the natural world in different ways. ... Students will be able to explain that some science investigations are not experiments because they DON'T involve testing a hypothesis by changing one variable while keeping the other factors constant.

Explanation:

It  really all depends on the levels of suspicion.

Answer:

sieving, sedimentations, or shaking the soil between two tumblers I guess

Answer: Replacement means a person or thing that takes the place of another; a substitute.

The balanced chemical equation for the reaction between H2 and CO is H2 + CO → CH3OH. Molecular masses of H2, CO, and CH3OH are 2 g/mol, 28 g/mol, and 32 g/mol, respectively. Given, Mass of H2 = 2.50 gMass of CO = 37.5 gWe need to find the mass of CH3OH produced.

Based on the equation above, 1 mole of H2 reacts with 1 mole of CO to produce 1 mole of CH3OH.In order to find the amount of CH3OH produced, we must first find the limiting reagent of the reaction.

We can do this by calculating the number of moles of each reactant present:

The number of moles of H2 = 2.50 g / 2 g/mol = 1.25 mol. The number of moles of CO = 37.5 g / 28 g/mol = 1.34 mol.

Since we have less moles of H2 than CO, H2 is the limiting reagent.

To calculate the amount of CH3OH produced, we can use the mole ratio from the balanced chemical equation:1 mol H2: 1 mol CO: 1 mol CH3OH.

Therefore, the number of moles of CH3OH produced is equal to the number of moles of H2, which is 1.25 mol.

To convert moles to grams, we use the formula: mass = number of moles x molecular mass.

Therefore, mass of CH3OH produced = 1.25 mol x 32 g/mol = 40 g.

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The Li 2CO 3, lithium carbonate, an inorganic chemical, is the lithium salt of carbonic acid.

Thus,The processing of metal oxides makes extensive use of this white salt. Due to its effectiveness in treating mood disorders, notably bipolar disorder, it is listed on the WHO's list of essential medicines and lithium carbonate,

Another crucial industrial chemical is lithium carbonate. Its primary function is as an ingredient in the substances used to create lithium-ion batteries.

Lithium carbonate glasses work well for ovenware. Ceramic glazes that are fired at low and high temperatures frequently contain lithium carbonate. When mixed with silica and other minerals, it produces low-melting fluxes.

Thus, The Li 2CO 3, lithium carbonate, an inorganic chemical, is the lithium salt of carbonic acid.

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Answer:

You will have to mix 240 mL of 75% acid with 300 mL of 30% acid to produce 540 mL of 50% acid

Explanation:

Wascana Chemicals should use emissions reduction technologies to reduce the amount of sulphur dioxide emitted during paint production.

To comply with the Ministry of Environment's directive, Wascana Chemicals, a paint manufacturer, needs to reduce the amount of sulphur dioxide released during paint production. This can be accomplished through the use of emissions reduction technology, such as scrubbers, catalytic converters, or gasification systems.Scrubbers are devices that use a wet process to remove pollutants from gas streams. The gas stream is forced through a scrubbing solution that traps pollutants, including sulphur dioxide.Catalytic converters, on the other hand, use a chemical process to transform pollutants into less harmful substances. Gasification systems convert solid or liquid materials into a gas, which can be combusted to generate energy.

In conclusion, to comply with the Ministry of Environment's emissions reduction regulations, Wascana Chemicals should consider implementing one or more emissions reduction technologies such as scrubbers, catalytic converters, or gasification systems to reduce the amount of sulphur dioxide emitted during paint production.

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b. dehydration synthesis reaction that removes a hydroxyl group from the carboxyl end of the amino acid and reforms the bond with the nitrogen from the amino group that has lost a hydrogen atom.

The peptide bond formation between two amino acids occurs through a dehydration synthesis reaction in which a water molecule is removed, allowing the carboxyl group of one amino acid to react with the amino group of another amino acid, forming a peptide bond and releasing a molecule of water. The resulting molecule is called a dipeptide. This process can be repeated to create longer polypeptide chains and ultimately form a protein.

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Answer:

A change in color often occurs during a chemical change

Adding baking soda to vinegar or battery acid will bubble, but not water. If the liquid fizzles, waft your fingers over it to smell it; battery acid does not smell like vinegar. Fizzing is battery acid, not vinegar.

This is further explained below.

Generally, A little amount of baking soda might be sprinkled on top of the liquid; if the liquid is vinegar or battery acid, it will fizz, however, water will not.

In conclusion, Whether it fizzles, or wafting your fingers over the liquid to obtain a scent of it might help you discern if it has the smell of vinegar; battery acid does not smell like vinegar.

If it fizzles, however, it is not vinegar; it is the smell of battery acid.

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Answer:

A. 1.73 m = 172 cm

B. 7,651.27 m = 7.65127 Km

Answer:

152.4 g of O₂ are consumed.

Explanation:

We start from the combustion reaction:

C₃H₈  +  5O₂  →  3CO₂  +  4H₂O

We convert the mass of propane to moles:

41.9 g . 1mol /44g = 0.952 moles

Ratio is 1:5. 1 mol of propane consumes 5 moles of oxygen at propane combustion

Then, 0.952 moles may consume (0.952 . 5) /1 = 4.76 moles.

We convert moles to mass → 4.76 mol . 32g/mol = 152.4 g

Answer:

1. D 2.. A 3. C 4. B

Explanation:

just took the quiz

We can classify each rock as intrusive or extrusive and basaltic or granitic as follows; Rock A - Extrusive, Basaltic, Rock B - Intrusive, Granitic, Rock C - Extrusive, Basaltic, and Rock D - Extrusive, Basaltic.

Rock A - Extrusive, Basaltic

Rock A is described as having dark-colored large grains, which indicates a fine-grained texture, typical of extrusive rocks. The presence of dark-colored large grains suggests a basaltic composition.

Rock B - Intrusive, Granitic

Rock B is described as having large crystals and a high percentage of silica, which suggests a coarse-grained texture, typical of intrusive rocks. The high silica content and large crystals indicate a granitic composition.

Rock C - Extrusive, Basaltic

Rock C is described as having a fine-grained texture and being light-colored, which are characteristic features of extrusive rocks. The fine-grained texture suggests a rapid cooling, typical of extrusive rocks, and the light color is indicative of a basaltic composition.

Rock D - Extrusive, Basaltic

Rock D is described as being from the Hawaiian volcano area and having no visible crystals. This indicates a glassy texture, typical of rapidly cooled extrusive rocks. The origin from a volcanic area and glassy texture suggest a basaltic composition.

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Answer:

18.52g

Explanation:

(relative atomic masses: H = 1.01, O = 16.00, Ca = 40.08)

Equation (balanced):

Ca + 2H2O -> Ca(OH)2 +H2

First, calculate the number of moles of 10g calcium

No. of moles of Ca  = 10/40.08 = 0.25 mol

Then, calculate the  number of moles of 20g water

No of moles of H2O = 1.11 mol

According to the balanced equation, 1 mole of calcium reacts with 2 moles of H2O completely.  Therefore, H2O is in excess.

So, 1 mole of calcium reacts with water to form 1 mole of Ca(OH)2 (according to the mole ratio shown in the balanced equation)

Therefore, 0.25 mol of Ca(OH)2 is produced.

Mass of Ca(OH)2 produced = no. of moles x molar mass = 0.25 x (40.08 + 16 + 16 + 1.01 + 1.01) = 18.52g

Good luck!

The partial pressure of carbon dioxide when the total atmospheric pressure (dry air) is 97.5 kPa is approximately 15.489375 Pa.

To find the partial pressure of carbon dioxide, we can use the mole fraction and the total atmospheric pressure.

Given that the mole fraction of carbon dioxide in dry air near sea level is 0.000375, we can calculate the partial pressure of carbon dioxide as follows:

1. Calculate the moles of carbon dioxide:
  Moles of CO2 = Mole fraction * Total moles of gas
  Since the mole fraction is 0.000375 and the total moles of gas is not provided, we can assume it to be 1 mole for simplicity:
  Moles of CO2 = 0.000375 * 1 = 0.000375 moles

2. Calculate the partial pressure of carbon dioxide:
  Partial pressure of CO2 = Moles of CO2 * Molar mass of CO2 * Total atmospheric pressure
  The molar mass of carbon dioxide is given as 44.010 g/mol, and the total atmospheric pressure is 97.5 kPa (kiloPascals).
  However, we need to convert the pressure to the appropriate units for the molar mass:
  1 kPa = 1000 Pa
  1 Pa = 1 N/m^2
  1 atm = 101325 Pa
  1 atm = 101.325 kPa
  So, the total atmospheric pressure in Pascals is 97.5 * 1000 = 97500 Pa.

  Now, we can calculate the partial pressure of carbon dioxide:
  Partial pressure of CO2 = 0.000375 moles * 44.010 g/mol * 97500 Pa
  Partial pressure of CO2 = 15.489375 Pa

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By unit conversion,  the distilled water for dialysis in gallons is 68.69 gallons.

We need to know about unit conversion to solve this problem. The unit conversion can be used to convert a unit to another unit. It can be defined as

a = xb

where a is unit a, b is unit b and x is the constant of conversion.

From the question above, we know that

V = 2.6 x 10² liters

The unit conversion that we used is (1 gal = 3.785 liters)

V = 2.6 x 10² liters

V = 2.6 x 10² / 3.785 gal

V = 68.69 gallons

Hence, the distilled water for dialysis in gallons is 68.69 gallons.

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Answer:

"The strength of ionization decreases as the proportion including its protons to the excited electrons" is the right solution.

Explanation:

This question seems incomplete. I believe the answer choices are as followed:

O The ionization energy decreases because the ratio of the protons to electrons increases.

O The ionization energy increases because the ratio of the protons to electrons increases.

O The ionization energy decreases because the ratio of the protons to electrons decreases.

O The ionization energy increases because the ratio of the protons to electrons decreases.

The answer to this is The ionization energy increases because the ratio of the protons to electrons increases. (2nd option).

The length and width of the swimming pool is 23.08.

What is length?

The term "length" refers to a measurement along an object's largest dimension. A portion of space, or volume, is occupied by a sample of material. Volume of an object can be determined by knowing the length of each side.

What is height?

The vertical distance between an object's top and bottom or its base and something above it is what is meant by the terms height, altitude, and elevation. Height is a vertical measurement, whether or not something is high.

2*6=4800

12=6400

=533^

=23.08

Therefore, the length and width of the swimming pool is 23.08.

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To solve this problem, let's use the definition for molarity:

Replacing the values of the problem:

Now, to find the mass, we multiply by the molecular weight of NaCl. (Which is about 58.44g/mol)

The answer is approximately 22.2g of NaCl

Answer:

1). In the periodic table as suggested by Mendeleev, elements were

the periodic table as suggested by Mendeleev, elements werearranged in the order of increasing atomic number.

--> T

2). Sodium (Z=11) is a member of a group called alkaline earth

Sodium (Z=11) is a member of a group called alkaline earthmetals.

--> T

3). Elements to the extreme right of the periodic table are metals.

--> F

They are non-metals .

4). Metalloids have properties of metals and non-metals.

--> T

Answer: 1

Explanation:

K2CO3 is potassium carbonate

There are 1 carbon atom in one formula unit of potassium carbonate.

A chemical molecule called potassium carbonate\((K_2CO_3)\) is made up of the atoms of potassium (K), carbon (C), and oxygen (O). It is also referred to as potash, pearl ash, or potash carbonate.

The chemical formula for potassium carbonate is \(K_2CO_3.\) In one formula unit of potassium carbonate, there are:

2 potassium (K) atoms

1 carbon (C) atom

3 oxygen (O) atoms

So, in total, there are 1 carbon atom in one formula unit of potassium carbonate.

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Answer:

24 hrs it takes for the earth to rotate

Answer:

In inferential statistics, the null hypothesis is a default hypothesis that a quantity to be measured is zero.

Answer:

75240J

Explanation:

Given parameters:

Mass of water  = 300g

Initial temperature of the water  = 85°C

Final temperature  = 25°C

Unknown:

Amount of heat released = ?

Solution:

The amount of heat released in this cooling process can be calculated using the expression below;

     H  = m x c x (t₂  - t₁)

m is the mass

c is the specific heat capacity of water  = 4.18J/g°C

t is the temperature

  Insert the parameters and solve;

 H = 300 x 4.18 x (25  - 85) = -75240J

The negative symbol denotes heat loss.

Explanation:

cells, dna, chromosomes, body systems

This particle is called neutron. It's characteristics are:

1. Neutron is electrically.

2. They show magnetic properties

Answer:

The answer would be 2,838,240,000

Explanation: In 1 year there are 31,536,000 and if you multiply that number by 90 you would get 2,838,240,000

Answer:

2838240000

Explanation:

1 calendar year =

31536000

X 90

=

2838240000

The total mass of sodium chloride is 58.44 g/mol.

The mass of sodium is 22.99 g/mol.

To find the percent sodium in sodium chloride can be found by dividing the amounts.

Therefore, the percent sodium is 39%.