4. What is valency? Explain different types of
valencies​

Answer:

I would expect the gas rate determined in this manner to be too low

Explanation:

A Rotameter can be designed to respond to the sensitivity of density, velocity, to measure the flow rate of liquid or gas enclosed in a tube. Liquids are denser than gas, and since the gas rate to be determined needed to respond to the velocity head alone of the rotameter so as to bring the forces in the tube equilibrium. Knowing if there is no flow, then the float would remain at the bottom, so gas has to flow at a higher rate compared to the liquid so the float would be in a similar position making it easier to measure the flowrate. This leaves the gas rate to be determined too low.

Answer:

Gravity, Inertia, and Velocity ( I decided to use three)

Explanation:

Gravity is the primary force that controls orbit and gravity works with inertia along with velocity.

Gravity, Inertia, and Velocity ( I decided to use three)

Explanation:

Gravity is the primary force that controls orbit and gravity works with inertia along with velocity.

Answer:

CCCCCCC

Explanation:

Answer:

C. radiation

Explanation:

the possible pollutant is radiation  because nuclear energy causes ; electromagnetic waves are radio waves, light, infrared rays, UV rays, X rays, Gamma rays. These are well known and are used extensively in the fields of communications, industry, medicine and research.

Radiation is a term given for waves caused by electromagnetism and high energy particles .Radioactive substances have High energy particles which are tiny bits of matter that are made to move at high speeds releasing nuclear radiation.  There are about 50 naturally occurring radioactive substances and More than 2000 man-made ones. There are three kinds of radioactive radiation – alpha particles, beta particles and gamma radiation.

Answer:

Option D. 1.67 g

Explanation:

The balanced equation for the reaction is given below:

6Li (s) + N₂ (g) → 2Li₃N (s)

Next, we shall determine the masses of Li and N₂ that reacted and the mass of

Li₃N produced from the balanced equation. This can be obtained as follow:

Molar mass of Li = 7 g/mol

Mass of Li from the balanced equation = 6 × 7 = 42 g

Molar mass of N₂ = 14 × 2 = 28 g/mol

Mass of N₂ from the balanced equation = 1 × 28 = 28 g

Molar mass of Li₃N = (7×3) + 14 = 21 + 14 = 35 g/mol

Mass of Li₃N from the balanced equation = 2 × 35 = 70 g

SUMMARY:

From the balanced equation above,

42 g of Li reacted with 28 g of N₂ to produce 70 g of Li₃N.

Next, we shall determine the limiting reactant. This can be obtained as illustrated below:

From the balanced equation above,

42 g of Li reacted with 28 g of N₂.

Therefore, 1 g of Li will react with =

(1 × 28)/42 = 0.67 g of N₂

From the calculation made above, we can see that only 0.67 g of N₂ out of 1 g given is required to react completely with 1 g of Li.

Therefore, Li is the limiting reactant and N₂ is the excess reactant.

Finally, we shall determine the theoretical yield of Iithium nitride, Li₃N.

The theoretical yield of Iithium nitride, Li₃N, can be obtained by using the limiting reactant as illustrated below:

From the balanced equation above,

42 g of Li reacted to produce 70 g of Li₃N.

Therefore, 1 g of Li will react to produce = (1 × 70)/42 = 1.67 g of Li₃N.

Thus, the theoretical yield of Iithium nitride, Li₃N is 1.67 g.

Answer:

Butanal

Explanation:

alkanes are not oxidized

Carboxylic acids cannot be oxidized

Alkanals can be oxidized

Answer:

20, 50, 25

Explanation:

I just figured it out somehow in my brain.

Answer: My answer is in the explanation

Explanation:

Physical and mechanical characteristics of iceberg ice were studied from samples collected near the shores of eastern Newfoundland. Although the physical characteristics show considerable diversity, iceberg ice has some common features and is generally porous, lacks significant concentrations of dissolved materials, contains internal cracks and has an irregular interlocking grain structure.

Answer:  The answer is [tex]8.4\times 10^8[/tex]

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Thus for product of  [tex](2.1\times 10^3)\times (4\times 10^5)[/tex]

In this problem, 2.1has 2 significant figures and 4 is an exact number with infinite significant digits thus product will have the least number of significant figures which is 2. So, the answer will be in 2 significant figures.

Therefore, the answer is [tex]8.4\times 10^8[/tex]

Answer:

Physical Property

Explanation:

As there is no chemical change or chemical related stuff in it!

Answer:

physical

Explanation:

Answer: 8

Explanation:

The atomic number of an element refers to the number of protons that it has in its nucleus. Carbon for instance has an atomic number of 6 because there are 6 protons in its nucleus.

This atomic number will also tell you the number of electrons the element (in its neutral state) has because protons and electrons are the same number. The reason the mass number is 18 in this scenario is that the element has 10 neutrons in its nucleus.

Answer:

C.

Explanation:

para sakin letter C ganonn

Answer:

75.924 g

Explanation:

To answer this question we first need to calculate the molar mass of Ga₂(SO₃)₃:

Molar Mass of Ga₂(SO₃)₃ = (Molar Mass of Ga)*2 + (Molar Mass of SO₃)*3

Molar Mass of Ga₂(SO₃)₃ = (69.72 g/mol)*2 + (80.06 g/mol) * 3

Then we convert 0.20 moles to grams, using the molar mass of Ga₂(SO₃)₃:

Mass of 0.20 moles of Ga₂(SO₃)₃ is 75.924 g

It is defined as the ratio of given mass over molar mass.

Given:

Number of moles= 0.20 moles

To find:

Mass=?

We need to calculate molar mass of Ga₂(SO₃)₃ first:

Molar Mass of Ga₂(SO₃)₃ = (Molar Mass of Ga)*2 + (Molar Mass of SO₃)*3

Molar Mass of SO₃ = Molar Mass of S + (Molar Mass of O)*3 = 80.06 g/mol

Molar Mass of Ga_2(SO_3)_3 = (69.72 g/mol)*2 + (80.06 g/mol) * 3

Molar Mass of Ga₂(SO₃)₃ =  379.62 g/mol

Then we convert 0.20 moles to grams, using the molar mass of Ga₂(SO₃)₃:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} \\\\\text{Given mass}=\text{Number of moles}*\text{Molar mass}\\\\\text{Given mass}=0.20 moles*379.62 g/mol\\\\\text{Given mass}=75.92 grams\\[/tex]

Thus, the mass of 0.20 moles of Ga₂(SO₃)₃ is 75.92 grams.

Learn more:

brainly.com/question/14464650

Answer:

Both A and B

Explanation:

A.

the limestone, because the acidic groundwater would dissolve the rock's calcite

B.

the granite, because the acidic groundwater would oxidize the rock's iron

Answer:

38.882

Explanation:

For all those Acellus kids XD

Answer:

0.342 m

Explanation:

From the question given above, the following data were obtained:

Mass of NaBr = 14.57 g

Mass of water = 415 g

Molar mass of NaBr = 102.89 g/mol

Molality of NaBr =?

Next, we shall determine the number of mole in 14.57 g of NaBr. This can be obtained as follow:

Mass of NaBr = 14.57 g

Molar mass of NaBr = 102.89 g/mol

Mole of NaBr =?

Mole = mass / molar mass

Mole of NaBr = 14.57 / 102.89

Mole of NaBr = 0.142 mole

Next, we shall convert 415 g of water to kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

415 g = 415 g × 1 Kg / 1000 g

415 g = 0.415 Kg

Thus, 415 g is equivalent to 0.415 Kg.

Finally, we shall determine Molality of the solution as follow:

Mole of NaBr = 0.142 mole

Mass of water = 0.415 Kg

Molality of NaBr =?

Molality = mole / mass of water in Kg

Molality of NaBr = 0.142 / 0.415

Molality of NaBr = 0.342 m

Therefore, the molality of NaBr solution is 0.342 m.

Answer:

0.341

Explanation:

as stated underneathe the 'tutor verified' answer. lol

Answer:

Q = -14322.77 J

Explanation:

Given data:

Mass of water = 55.0 g

Initial temperature = 87.3°C

Final temperature = 25.0 °C

Heat given off = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25.0 °C - 87.3°C

ΔT = - 62.3 °C

Q = 55.0 g×4.18 J/g.°C × - 62.3 °C

Q = -14322.77 J

Answer:

for 1 mole CH4 1 mole of CO2 and 2 mole of H20 is produced.

if 2.5 mole CH4 is reacted 2.5 mole CO2 and 5 mole of H20 is produced

Answer:

D

Explanation:

The particles will move side to side over large areas.

Answer:

The particles will move side to side over large areas.

Explanation:

Answer:

your answer is flammability

Answer:

1.89 × 10³ J

Explanation:

Step 1: Given data

Step 2: Calculate the heat (Q) required to melt the sample

The fusion is the phase change from solid to liquid. We can calculate the heat required for the fusion of the sample using the following expression.

Q = ΔH°fus × m

Q = 126 J/g × 15.0 g

Q = 1.89 × 10³ J

Answer:

A scientist added bacteria and a nutrient medium that could support the growth of the bacteria to a sterilized petri dish. No other materials were added. The graph models growth of the bacteria over time. ... The bacteria did not reproduce in the system, and eventually each individual died at the end of its life cycle.

Explanation:

Plz mark brainliest thanks

Answer:

The answer is "[tex]2.73 \times 10^3 \ K[/tex] ".

Explanation:

Please find the complete question in the attachment.

The Formula for Ideal gas:

[tex]\to PV = nRT \\\\[/tex]

          [tex]= ( \frac{m}{M})RT[/tex]

[tex]\to Density\ \rho = \frac{m}{V} = \frac{PM}{RT}[/tex]

[tex]\to P= pressure\\\\\to V = volume\\\\ \to n = moles\ of \ gas \\\\\to R = molar \ gas \ constant\\\\ \to T = temperature\\\\ \to m = mass \\\\ \to M = molar \ mass[/tex]

[tex]\to P(Ar) = P(He) = 1.00 atm\\\\\to T(Ar) = ?\\\\ T(He) = 273.2 \ K\\\\\to M(Ar) = 39.948 \ \frac{g}{mol}\\\\ \to M(He) = 4.0026 \ \frac{g}{mol}\\\\\to \rho(Ar) = \rho(He)\\\\\bold{Formula: } \\\\ \to \frac{P(Ar)M(Ar)}{RT(Ar)} = \frac{P(He)M(He)}{RT(He)}\\\\\to \frac{1.00 \times 39.948}{(0.08206 \times T(Ar))} = \frac{1.00 \times 4.0026}{(0.08206 \times 273.2)}\\\\ \to T(Ar) = 2.73 \times 10^3 \ K[/tex]

Answer:

The density of something is the connection between the mass of the substance and how much space it takes up

Answer:

The bubble goes into the atmosphere.

Explanation:

All the dissolved air evaporated from the water when there is 1 atmospheric pressure for a long time because the air is dissolved with high pressure so when the pressure is removed from the gas present in water. The bubble go away from the water solution due to more kinetic energy present in it as compared to lower atmospheric pressure.

Answer:

Wood absorbs solar radiation to make chemical energy.

The chemical energy of wood has been absorbed by solar radiation. Thus, option B is correct.

The wood has been the source of energy by the burning for a long duration. The chemical energy has been stored in the dry wood has been converted to light and heat energy on burning.

The energy stored in the wood has been comprised by photosynthesis, where the solar energy has been entrapped in the wood and is converted to chemical energy that is stored.

Thus, the chemical energy of wood has been absorbed by solar radiation. Thus, option B is correct.

For more information about the stored energy of wood, refer to the link:

https://brainly.com/question/20326508

Answer:

Mass = 58.5 g

Explanation:

Given data:

Volume of solution = 4 L

Molarity of solution = 0.25 M

Grams of NaCl required = ?

Solution:

Formula:

Molarity = number of moles / volume in L

By putting values,

0.25 M = number of moles / 4 L

Number of moles = 0.25 mol/L × 4 L

Number of moles = 1 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 1 mol × 58.5 g/mol

Mass = 58.5 g

Answer:

5.38 g of CO.

Explanation:

From the question given above, the following data were obtained:

Volume of CO = 4.3 L

Mass of CO =?

Next, we shall determine the number of mole of CO that occupied 4.3 L at STP. This can be obtained as follow:

Recall = 1 mole of any gas occupy 22.4 L at STP.

1 mole of CO occupied 22.4 L at STP.

Therefore, Xmol of CO will occupy 4.3 L at STP i.e

Xmol of CO = 4.3 / 22.4

Xmol of CO = 0.192 mole.

Thus, 0.192 mole of CO occupy 4.3 L at STP.

Finally, we shall determine the mass of CO as follow:

Mole of CO = 0.192 mole.

Molar mass of CO = 12 + 16 = 28 g/mol

Mass of CO =?

Mole = mass /Molar mass

0.192 = mass of CO / 28

Cross multiply

Mass of CO = 0.192 × 28

Mass of CO = 5.38 g.

Therefore, 5.38 g of CO occupied 4.3 L at STP.

Answer:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.)