help with the 3rd question plslsls I’ll brainlist.

Answer:

race, religion, sex, if they are 40 or older, have a disability, pregnancy/childbirth. hope that helped

The equations for the preparation of C₂H₅Br from alcohol using PX₃ and HX are shown in the attachment below.

a) Preparation of C₂H₅Br from alcohol using PX₃

In PX₃, X refers to the halides (F, Cl, Br etc.). Since the desired ethyl halide is ethyl bromide (C₂H₅Br) , then X in PX₃ will be Br. Therefore, PBr₃ will be used in the reaction as shown in the attachment below.

b) Preparation of C₂H₅Br from alcohol using HX

Also, In HX, X refers to the halides (F, Cl, Br etc.). Since the desired ethyl halide is ethyl bromide (C₂H₅Br), then X in HX will be Br. Therefore, HBr will be used in the reaction as shown in the attachment below.

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Answer:

Answer: 8 protons and 8 neutrons

Explanation:

The mass number of oxygen is 16

Atomic number is 8

but proton number = atomic number = 8 protons

[tex]neutrons = mass \: number - atomic \: number \\ [/tex]

neutrons = 16 - 8 = 8 neutrons.

The nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.

The atomic number may be defined as the number of a chemical element in the periodic table through which the elements are arranged in order of increasing the number of protons in the nucleus.

The atomic number of an element = The number of protons in the nucleus of an atom.

Now, according to the question,

If Oxygen has an atomic number of 8, that means the number of protons = 8.

The number of neutrons can be calculated as follows:

Neutrons = mass number - the atomic number.

                = 16 - 8 = 8 neutrons.

Therefore, the nucleus of an atom of oxygen typically contains 8 protons and 8 neutrons specifically. So, none of the above options is correct.

To learn more about the Nucleus of oxygen, refer to the link:

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Answer:

they are funny and unite.

Thank You

Number of men required to stand on top of each other to reach moon from earth are :

[tex] \boxed{ \boxed{ \: \: \: \: \: \: \: 210320000 \: \: \: \: \: \: \: }}[/tex]

Answer:

C is the correct answer.

Explanation:

Agar provides a solid growth surface for the bacteria, upon which bacteria reproduce until the distinctive lumps of cells.

The agar medium is used in Petri dishes because it helps microorganisms grow. option C is correct.

A microorganism is a microscopic body that cannot be seen with the normal human eyes on anything it can be a virus or bacteria or both. Viruses are disease-causing mostly but there are some good bacteria too.

The use of agar medium is the source of food for the microorganism as all the micronutrients and macronutrients with essential amino acids are present into it.

Therefore, option C is the correct agar medium used in Petri dishes because it helps microorganisms grow.

Learn more about microorganism, here:

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#1

[tex]\\ \sf\longmapsto {}^{88}_{38}Sr^{2+}[/tex]

#2

[tex]\\ \sf\longmapsto {}^{51}_{23}V^{3+}[/tex]

#3

[tex]\\ \sf\longmapsto {}^{55}_{26}Fe^{3+}[/tex]

#4

[tex]\\ \sf\longmapsto {}^{112}_{48}[/tex]

#5

[tex]\\ \sf\longmapsto {}^{210}_{82}Pb^{2+}[/tex]

Answer:

up with you and the other day and I don't think I can get a chance

Answer:

hypothesis = A tentative explanation for a question, testable through experiments.

theory = An explanation supported by many experiments, answers "why".

law = A relationship in nature supported by many experiments.

Explanation:

Note down the formula below

[tex]\boxed{\sf Mass\%\;of\; element=\dfrac{Mass\:of\:the\: element}{Mass\;of\:the\: compound}\times 100}[/tex]

Mass of the compound

[tex]\\ \sf\longmapsto 32+2=34g[/tex]

Mass % of Hydrogen:-

[tex]\\ \sf\longmapsto \dfrac{2}{34}\times 100[/tex]

[tex]\\ \sf\longmapsto \dfrac{1}{17}\times 100[/tex]

[tex]\\ \sf\longmapsto 5.8\%[/tex]

Mass % of Oxygen:-

[tex]\\ \sf\longmapsto \dfrac{32}{34}\times 100[/tex]

[tex]\\ \sf\longmapsto \dfrac{16}{17}\times 100[/tex]

[tex]\\ \sf\longmapsto 94.2\%[/tex]

Answer:

1 cm » 0.00001 km

1 sec » 1/86400 days

[tex]7500 {cm \: sec}^{ - 1} = \frac{75 00\: cm}{1 \: sec} \\ \\ = \frac{7500 \times 0.00001 \: km}{(1 \times \frac{1}{86400}) \: day } \\ \\ = { \boxed{ \boxed{6480 \: km \: {day}^{ - 1} }}}[/tex]

1 mole of water = 18g

6 moles of water = 18×6 = 108 g

Answer:

9 days

No explanation needed.

Answer:

Not all mixtures are solutions. A solution is a specific term that describes an even or homogeneous mixture of a solute, the substance being mixed, in a solvent, the substance that is in a greater amount in which the solute dissolves. All solutions are mixtures because it is two or more substances mixed together.

Answer:

yes

Explanation:

Testing scientific ideas

Testing Ideas. Testing hypotheses and theories is at the core of the process of science. ... match actual results observation, that lends support.

Answer:  No, the samples are not of equal masses.

Explanation:  Mass is volume X density

A:  (2ml)*(18.4g/ml) = 36.8 g

B:  (5ml(*(35.5g/ml) = 177.5 g

Answer:

I think its A And C OR D HOPE ITS RIGHT

Explanation: BY THE LOVE YOUR AVTAR

True statements are:

Density increases if the volume of an object decreases and the mass remains the same.

Density increases if the mass of an object increases and the volume remains the same.

Density remains the the same if the mass and volume of an object increases proportional.

Further:

Density = Mass/Volume

Answer:

Variable data is defined as information and figures used to build control charts. Variable data can be used to create average (X-bar) charts, range charts, and sample standard deviation charts or "S-charts."

Answer:

Lanthanum and Lutetium

I hope this will help you

Answer:

Reaction??

Explanation:

Answer:

Advantages :they are used for seeing chemical reactions .

they are used for doing chemical experiment .

they are used for making affective medicines .

Disadvantages :they harms to our environment.

they can make side effects in our body by affective medicines made by chemicals.

while doing different unknown experiments they make explosions which can also harm to us.

Answer:

Plasma, in physics, an electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles, produced when the atoms in a gas become ionized. It is sometimes referred to as the fourth state of matter, distinct from the solid, liquid, and gaseous states.

Answer:

V= π ×r² × h

V = 3.14 × (0.9)² × 4

V = 3.14 × 0.81 × 4

V = 10.1736

Mass = Volume × density

M = 10.1736 × 2.6

M = 26.45136 g

Explanation:

Add ethanol ( or whichever you choose) into the mixture.

Use a filter to separate the salt from mix.

Evaporate the ethanol/petroleum spirit -sugar mix to get the sugar by itself.

Done!

Answer:  1)  a) Use a magnet, or b) add to water abd scoop off the floating plastic beads

2)  Grind the leaf and solubilize what you can in water, then use filter paper as a chromatograph to separate the colors.

Explanation:

1)  Look for any property between the two substances that has a large enough difference to provide an avenue for separation.  Density is good, particle size also can be used, solubility, and magnetic properties, among others.

2)  https://www.britannica.com/science/paper-chromatography

Answer: I'm pretty sure the action is Jerod swinging the golf club and the reaction is hitting the ball

Explanation:

Answer:

anatomical position is the answer