As Which is a case of drug abuse?

A.

taking an analgesic whenever you have a headache, no matter how mild

B.

taking double the dosage, by accident, of a medicine that your doctor has prescribed

C.

taking a tranquilizer every night when the label warns not to take it on consecutive nightspirin is a widely used drug. What kind of medicine is it?

Answer:

Explanation:

I think you mean

2N2H4 + N2O4 ==> 3 N2 + 4H2O

The equation says that for Every mol of N2O4, you need 2 moles of N2H4.

1/2 = x/3,5       Multiply both sides by 3.5

3.5*1 / 2 = x

1.75 = x

Therefore you need 1.75 moles N2O4 are needed for 3.5 moles of N2H4

Answer:

I believe it's A. to reduce air bubbles. Tbh, it's been a while

Answer:

I think it's a

Explanation:

not sure hssjkskaakakskksskksqoqkakskzksjsj

Answer: The answer is, D) Burning.

Explanation: Some moderator removed my last answer because someone reported it.

Answer: B) is the answer.

Explanation:

Answer:

It must first melt to become a liquid and then evaporate to become a gas

Explanation:

Answer:

The nucleus of an atom is positively charged.

Explanation:

The nucleus of an atom is positively charged because :

The nucleus is a small dense region at the center of the atom. It consists of a positive protons and neutral neutrons. so, It has an overall positive charged.

Answer:

None of these

Explanation:

The mass percent is 35.4% (3 s.f.)

14/4+35.5 = 14/39.5 x 100 = 35.4 (3 s.f.)

Answer:

no se

ablar inglés losiento princesa

por que todo me sale en inglés?

Explicación?:

answer:lettter B that is answer

Answer:

The answer is relevant.

Scientific investigations must be well relevant to be sure the data collected will help answer the scientist's question.

A scientific investigation is an investigation that is done in the field of science. This unravels the secrets of the earth and the logical reason behind the things happening.

There are three types of scientific investigations. They are descriptive investigation, comparative investigation, and experimental investigation. When we see a thing happening in the environment or anywhere, always find a reason behind it.

The steps in completing a scientific investigation are:

Thus, the scientific investigations must be well relevant to the data.

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Answer:

The theoretical yield of urea = 120.35kg

The percent yield for the reaction = 72.70%

Explanation:

Lets calculate -

The given reaction is -

[tex]2NH_3(aq)+CO_2[/tex] →[tex]CH_4N_2O(aq)+H_2O (l)[/tex]

Molar mass of urea [tex]CH_4N_2O[/tex]= 60g/mole

Moles of [tex]NH_3[/tex] = [tex]\frac{62.8kg/mole}{17g/mole}[/tex] (since [tex]Moles=\frac{mass of substance}{mass of one mole}[/tex])

                     = 4011.76 moles

Moles of [tex]CO_2[/tex] = [tex]\frac{105kg}{44g/mole}[/tex]

                = [tex]\frac{105000g}{44g/mole}[/tex]

                = 2386.36 moles

Theoritically , moles of [tex]NH_3[/tex] required = double the moles of [tex]CO_2[/tex]

    but , [tex]4011.76<2\times 2386.36[/tex] , the limiting reagent is [tex]NH_3[/tex]

Theoritical moles of urea obtained = [tex]\frac{1 mole CH_4N_2O}{2mole NH_3}\times4011.76 mole NH_3[/tex]

                                                      = [tex]2005.88mole CH_4N_2O[/tex]

Mass of 2005.88 mole of [tex]CH_4N_2O[/tex] =[tex]2005.88 mole \times\frac{60g CH_4N_2O}{1mole CH_4N_2O}[/tex]

                                                     = 120352.8g

                                                     [tex]120352.8g\times \frac{1kg}{1000g}[/tex]

                                                     = 120.35kg

Therefore , theroritical yeild of urea = 120.35kg

Now , Percent yeild = [tex]\frac{87.5kg}{120.35kg}\times100[/tex]

                                 72.70%

Thus , the percent yeild for the reaction is 72.70%

Answer:

C. oil and vinegar

Explanation:

A heterogeneous mixture is a mixture where the components are not uniform in composition, like oil and water. They don't mix. When you mix oil and vinegar, you have 2 layers because oil is less dense than vinegar.

Answer:An oxygen atom usually has 8 protons, 8 neutrons, and 8 electrons. Looking at the periodic table, oxygen has atomic number 8 and atomic weight 15.999.

Explanation:

The mass of the atom with 8 protons, 8 electrons, and 8 neutrons would be approximately 16 atomic mass units as the number of electrons has an almost negligible contribution to the mass of the atom.

It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus.

Atomic mass = total number of protons present in the nucleus + total number of neutrons present in the nucleus of an atom,

As given in the problem we have to find the atomic mass of the atom with  eight protons, eight electrons, and eight neutrons,

This given specified atom clearly represents the oxygen atom as it has eight electrons protons and neutrons each.

Thus, the atomic mass of the given atom would be 16.

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Answer:

Question is unclear

Explanation:

Answer:

what ru asking dear??? write question properly ??? Write the correct question from next time.

Answer:

1 oxygen

Explanation:

cause H2O= two hydrogen + one oxyge

Answer: true

Explanation:

Hope this helps

Two ways that stress could negatively impact a students performance is by causing them to procrastinate. When you're stressed, you tend to keep putting things off because you "just can't deal with it" at the moment. This could cause the student to turn in their assignments late (or not at all) and cause their grades to drop. Additionally, when you're stressed, it's harder to fall asleep, and once you are, you don't sleep as well. Sleep deprivation can greatly affect a student's in class performance by causing them to fall asleep in class, or not pay attention as well.

CH₄ + 2O₂ = CO₂ + 2H₂O

The empirical formula will be C2H.

The easiest whole-number proportion of the numerous elements in a molecule is represented by an empirical formula.

Calculation of empirical formula

Given data:

C = 11.0 g

H = 4.5 g

The atomic mass of C = 12

The atomic mass of H = 1

Now, divide the mass by atomic mass.

1) For carbon atom= 11 / 12 =0.91

2) For hydrogen atom = 4.5 / 1=4.5

Now, divide the lowest term by the obtaining whole number.

1) For carbon atom = 11/ 0.91 = 12

2) For hydrogen atom = 4.5/0.91 = 5

Therefore, the empirical formula will be C2H,

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Answer:

You can't tell with the information provided.

Explanation:

Since this is a balanced chemical equation, there is no limiting reactant. Can you tell us how much of the reactants you began with?

Answer:Douse the fire with baking soda: The chemical compound sodium bicarbonate, commonly called baking soda, is effective for extinguishing this type of fire. It takes a lot of baking soda to smother a grease fire, so pour it on while the flames are still small for the greatest effect

Explanation:

The grease fire has been put down by the addition of sodium bicarbonate as the extinguisher.

Grease fire has been defined as the fire that has been started with the over heating of the cooking oil at home. The fire has been started with the burning of the flammable liquids.

The fire in the cooking oil has been controlled with the addition of the sheet over the fire and turning off the flame.

The addition of water to grease fire results in the splashing of water over the fire and the spreading, resulting in the hazardous effects.

The sodium bicarbonate or baking soda has been used to put down grease fire.

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1,516.31168 grams of Magnesium Hydroxide

Answer:

1) BaCl2 + Na2O = BaO + 2NaCl

2) C4H8 + 6O2 = 4CO2 + 4H2O

3) MgCO3 + 2K = K2CO3 + Mg

4) N2 + 3F2 = 2NF3

Answer:

2M

Explanation:

Molarity refers to the molar concentration of a solution. It can be calculated by using the formula as follows:

Molarity (M) = number of moles (n) ÷ volume (V)

Based on the information provided in this question, 2 moles of salt is dissolved to form 1 liter of solution. This means that n = 2mol, V = 1L

Molarity = n/V

Molarity = 2/1

Molarity = 2M

Answer:

yo te diria que el elastico amigo es esa

Volume stays constant, so: P1/T1 = P2/T2

P1 = 3 atm

T1 = 20*C = 293 K

P2 = ?

T2 = 50*C = 323 K

Solve for P2: P1T2/T1 = P2

P2 = (3 atm)(323 K)/(293 K) = 3.3 atm

The Pressure of N2 after its temperature increased will be "3.3 atm". To understand the calculation, check below.

According to the question,

Pressure, P₁ = 3 atm

Temperature, T₁ = 20°C or,

                           = 293 K

                      T₂ = 50°C or,

                           = 323 K  

We know the relation,

→ [tex]\frac{P_1}{T_1}[/tex] = [tex]\frac{P_2}{T_2}[/tex]

or,

Pressure, P₂ = [tex]\frac{P_1\times T_2}{T_1}[/tex]

By substituting the values,

                     = [tex]\frac{3\times 323}{293}[/tex]

                     = [tex]\frac{969}{293}[/tex]

                     = 3.3 atm

Thus the above response is correct.

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