Help me in the 10 the number. Clue- helium and hydrogen make up the first of these

Answer:

He put segregationists in charge of federal agencies...

Explanation:

...

Answer:

He placed segregationists in charge of federal agencies.

Explanation:

Answer:

Section a:

1. stratosphere

2. radio waves

3. nitrogen, oxygen

4. humidity

5. smoke, fog

Section b:

1. ozone layer

2. stratosphere

3. carbon dioxide (CO2)

4. smoke

5. tropical areas

Section c:

1. false, it is clear

Hope those help and are all correct

Answer:

The first thing we have to do is change and state all the units so that we can use our ideal gas law equation ([tex]PV = nRT[/tex]).

650 mmHg is a pressure unit, we have to convert this to kiloPascals. We know that 760 mmHg gives us 101 kPa.

[tex]650 \ mmHg \ * \ \frac{101kPa}{760 mmHg} = 86 \ kPa[/tex]

P = 86kPa

T = 15°C + 273K = 288K

R (Gas constant) = 8.31 kj/mol  

Molar mass of Ammonia ([tex]NH_{3}[/tex]) = (1 x 3) + (14) = 17g/mol

n (moles) = [tex]\frac{mass}{molar \ mass}[/tex] [tex]= \frac{56.8}{17} =[/tex] 3.34 mol

V = ?

Rearrange the equation to solve for Volume:

[tex]V = \frac{nRT}{P}[/tex]

Substitute the values inside:

V = [tex]\frac{(3.34)(8.31)(288)}{(86)} = 93 L (rounded)[/tex]

Therefore 93 L of volume is occupied by the ammonia gas.

Given a sample of three unknown solids, we would be able to deduce which are ionic solids by their melting and boiling points, conductivity in water, and the insulation they provide.

Therefore, we can find the ionic solids amongst the samples by testing their melting and boiling points, conductivity in water, and the insulation they provide, given that each of these should provide high values to indicate an ionic solid.

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Answer:

A. Na+ OH-

Explanation:

positive and negative ions form bonds because positive and negative attract

Answer: possibly diffusion

Explanation:

all particles are in motion unless at a certain degree so they'd spread throughout the room diluting as they continue to spread out.

Answer:

14. 21.51 liters

15. 12.9 centimeters

16. 3400 milliliters

Explanation:

I don't really know how to show the work

Answer:

D

Explanation:

braineist pls???????????

Answer:

C

Explanation:

gram is bigger than atom duh

Answer:

the Answer is A B D

Explanation:

the cunduction in the spoons are equal to all the following answers

Conduction occurred more readily in the tin due to its lower specific heat capacity, Heat transfer via conduction occurred from the hot water to the spoons and then to the butter, The atoms in the tin spoon vibrated and collided at a greater rate thon those in the wood or plastic spoons. Thus option A,B, D are correct.

Specific heat can be measured as the quantity of heat required to increase the temperature of one gram of a substance by one degree Celsius.

The units of specific heat  are represented as calories or joules per gram per Celsius degree such as the specific heat of water is 1 calorie  per gram per Celsius degree

Specific heat capacity= Heat quantity/ mass × change in temperature.

If Q is the quantity of heat in joules, M is the mass of substance heated,

If ∆O is the change in temperature in Kelvin, Then Q= MC∆O, C is a constant called Specific heat capacity. Therefore, making C the subject of formula:

C= Q /M∆O

Thus option A,B, D are correct.

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Newton’s second law of motion is a dot product of mass and acceleration, if you remove the table from, under the book, gravity will act on the book and pull it downwards to the centre of the earth

Newton's Second law of motion states that "the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object."

In our case the mass of the book and the force of gravity

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To solve such this we must know the concept of double displacement reaction. Therefore, the correct option is option B that is kinetic energy of collisions of reactant particles.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

There are so many factors that affects the rate of reaction, among these, kinetic energy of collisions of reactant particles affect the rate of a chemical reaction. the rate of reaction is directly proportional to the rate of chemical reaction.

Therefore, the correct option is option B.

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Answer:

Hydrogen, hope this helps :)

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The Rutherford model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.

Answer: anemia because Marie curie died of anemia

The concentration in mol/dm³ of the ammonia used is 2.07 mol/dm³

3NH₃ (aq) + H₃PO₄ (aq) -> (NH₄)₃PO₄ (aq)

From the balanced equation above,

MaVa / MbVb = nA / nB

(1.25 × 25) / (Mb × 45.3) = 1 / 3

31.25 / (Mb × 45.3) = 1 / 3

Cross multiply

Mb × 45.3 = 31.25 × 3

Divide both side by 45.3

Mb = (31.25 × 3) / 45.3

Mb = 2.07 mol/dm³

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To solve this we must be knowing each and every concept related to  lymph node. Therefore, the correct option is option D among all the given options.

A lymph node, sometimes known as a lymphatic gland, is indeed a kidney-shaped lymphatic and immune system component. The lymphatic veins connect a massive amount of lymph nodes to one another throughout the body.

Most lymph nodes lie within the trunk adjacent to other major structures in the body - such as the paraaortic lymph nodes and the tracheobronchial lymph nodes. The lymphatic drainage patterns are different from person to person and even asymmetrical on each side of the same body. Bacteria and dead cells are removed from circulatory fluid in the lymph nodes.

Therefore, the correct option is option D.

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Answer:The octet rule

Explanation:that there is eight electrons in the valence shell to make it stable.

Explanation:

atom with greater stability have less energy, so a reaction that the stability of the atom will release in the form of heat or light.

Answer:

Dived the numbers by each other

Explanation:

25.3/19.9

Answer:

Hyperkalemia

Explanation:

The condition of acidosis can also cause Hyperkalemia because the higher H concentration diffuses to the ICF, pushing K towards the ECF.

Answer:

year 1 is 5.5%

year 2 is 7.5%

year 3 is 10.2%

Explanation:

since,

length of the transect covered in seaweed / total lenth of transect x 100

then,

0.55 / 10.0 x 100 = 5.5

and

0.75 / 10.0 x 100 = 7.5

and

1.02 / 10.0 x 100 = 10.2

you could also just move the decimal to the right once

:)

Answer: A change in color is not always a chemical change. If one were to change the color of a substance in a non-chemical reaction scenario, such as painting a car, the change is physical and not chemical.

Solid → Liquid: Melting

Solid → Gas: Sublimation

Liquid → Gas: Vaporization

Gas → Liquid: Condensation

Explanation:

Answer:

Technetium. It is only found in the stars.

Explanation:

Sorry, but thats all I could find for tou

The are many elements which are not present in human body. But almost all the discovered elements are there in the universe. But the one which is not present in earth and air is technetium

Technetium  is the first synthesized element by man in 1937. Technetium has no stable isotopes and it is not found in earth. But it is present in stars. However, rare earth elements such as promethium , francium etc. can be prepared or observed from uranium ores.

There are many elements especially  some actinides and lanthanides which are not present in earth naturally existence on starts and other planets.

Human body is made of various elements including carbon, oxygen, nitrogen, various metals like iron, zinc etc.  Various enzymes contains different elements but the number of elements which are in the surroundings of human and not inside is larger.

Therefore, all the discovered elements are found in the universe and some them are not present in earth.  

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paper chromatography, in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper..The method consists of applying the test solution or sample as a spot near one corner of a sheet of filter paper.

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Solving part-1 only

#1

KMnO_4

#2

Actually it's the oxidation number of Mn

Let's find how?

[tex]\\ \tt\Rrightarrow x+1+4(-2)=0[/tex]

[tex]\\ \tt\Rrightarrow x+1-8=0[/tex]

[tex]\\ \tt\Rrightarrow x-7=0[/tex]

[tex]\\ \tt\Rrightarrow x=+7[/tex]

#3

#4

[tex]\boxed{\begin{array}{c|c|c}\boxed{\bf Tube} &\boxed{\bf Charge} &\boxed{\bf No\:of\; electrons\: loss}\\ \sf 2 &\sf +6 &\sf 6e^-\\ \sf 3& \sf +2 &\sf 2e- \\ \sf 4 &\sf 4 &\sf 4e^-\end{array}}[/tex]

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer:

Why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height? Increasing the flow rate decreases the time the solute resides in the column, resulting in less diffusional broadening.

Explanation: