You heat a 5.05 g piece of titanium to 98.2 oC and place it into 20.00 mL of room temperature water (24.8 oC ). The temperature of the water rises to 27.3 oC. The specific heat of water is 4.184 J/goC. The density of water is 0.997 g/mL. A. How much heat is absorbed by the water (in units of J)

Answer:

-OH functional group

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Answer:

the answer is option B is i guess

If the pH of a solution increases from 4.0 to 6.0, the hydronium ion concentration will be increased by a factor 100.

The potential of Hydrogen is the complete version of pH. The negative logarithm of H+ ion concentration is known as pH. As a result, the definition of pH is "potential hydrogen strength." The concentration of hydrogen ions in a particular solution is known as pH, and it is used to determine whether a solution is acidic or basic.

It can be expressed as:

pH = -log [[tex]H_{3}O[/tex]]

Calculation of concentration of hydronium ion with pH formula:

It can be written as,  [[tex]H_{3}O[/tex]] = [tex]10^{pH}[/tex]

Case 1: pH = 4

when pH = 4, put the value of pH in above expression.

[[tex]H_{3}O[/tex]] = [tex]10^{4}[/tex] = 10000.

Case 2: pH = 6

when pH = 6, put the value of pH in above expression.

[[tex]H_{3}O[/tex]] = [tex]10^{6}[/tex] = 1000000.

[[tex]H_{3}O[/tex]]1 /  [[tex]H_{3}O[/tex]]2 = 10000/1000000

[[tex]H_{3}O[/tex]]1 / [[tex]H_{3}O[/tex]]2 = 1 / 100

Therefore, the concentration of hydronium will be increased by a factor 100.

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Answer:

[tex]2.17gO_2[/tex]

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the mass of 4.09 x 10^22 molecules of oxygen gas by firstly keeping in mind that that 1 mole of it has a mass of 32.0 g and secondly that 1 mole of any substance contains 6.022x10^23 representative units, in this case, molecules of O2, and thus, the appropriate setup to perform this conversion is shown below:

[tex]4.09x10^{22}molecules \ O_2*\frac{1molO_2}{6.022x10^{23}molecules \ O_2}*\frac{32.0gO_2}{1molO_2} \\\\2.17gO_2[/tex]

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Answer:

They Are All Very Good Statements But I Will Go With "A"

Explanation:

I go with "A" Because In The statement it has a cause an effect, it has a positive term and a negative term, in other uses it is "A" between energy inputs and outputs, and events.

The statement that correctly describes the relationship between the event and its effect on energy inputs and outputs is Option A .

Energy is defined as the capacity to do work .

There are various types of Energy , Light Energy , Sound Energy , Solar Energy , Wind Energy etc .

Volcanic eruptions emit huge amounts of volcanic dust, sulfur compounds and water vapor into the atmosphere .

This reduces the atmospheric transparency and that results into causing hindrance to the solar radiation penetration in the earth's surface ,

This results in short term cooling effect over large areas of earth.

Among all the statements , Option A , The eruption of a volcano increases the concentration of particles in the atmosphere, which decreases the amount of energy that can reach Earth from the Sun in the short term , correctly describe the relationship between the event and its effect on energy inputs and outputs.

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Answer:

3 M

Explanation: 1.5mol/.5L = 3M

Explanation:

The number of protons and neutrons. you can simply subtract the number of protons, or atomic number, from the mass number to get your final answer.

The oxidation state of P in [tex]Ca_3(PO_4)_2[/tex] is +5. In the compound [tex]Ca_3(PO_4)_2[/tex], there are 3 Ca ions, each with an oxidation state of +2, and 2 [tex]PO_4[/tex] ions. The correct answer is option C.

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Answer:

The nitrogen atom is sp³ hybridized

This is trigonal pyrymid shape

Explanation:

Step 1: Data given

A compound contains only nitroen (N) and Iodine (I)

The procent of nitrogen by mass = 3.55%

Atomic mass of N = 14.0 g/mol

Atomic mass of I = 126.9 g/mol

Step 2: Calculate mass % of iodine

Mass % iodine = 100 % - 3.55%

Mass % iodine = 96.45 %

Step 3: Calculate number of moles

Let's suppose the total mass = 100 grams

Mass of N = 3.55 grams

Mass of I = 96.45 grams

Moles N = 3.55 grams / 14.0 g/mol = 0.254 moles

Moles I = 96.45 grams / 126.9 g/mol = 0.760 moles

Step 4: Calculate empirical formula

For 0.254 moles N we have 0.760 moles I this is 1:3

This means that for 1 mol N we have 3 moles I

The empirical ( and also the molecular) formula is I3N

The nitrogen atom is sp³ hybridized.

This is trigonal pyrymid shape

Answer:

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT, you can find P

P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L

P = 1.642 atm = 1.6 atm (to 2 significant figures)

Explanation:

Answer:

Following are the responses to the given choices:

Explanation:

For point a:

Using the acid and base which are strong so,

moles of [tex]H^+[/tex] (from[tex]HNO_3[/tex])

[tex]= 24.9\ mL \times 0.100\ M \\\\= \frac{24.9}{1000\ L} \times 0.100\ M \\\\= 2.49 \times 10^{-3} \ mol[/tex]

moles of [tex]OH^{-}[/tex] (from [tex]KOH[/tex])

[tex]= 25.0\ mL \times 0.100\ M \\\\= \frac{25.0}{1000 \ L} \times 0.100 \ M \\\\\= 2.50 \times 10^{-3}\ mol[/tex]  

[tex]1\ mol H^{+} \ neutralizes\ 1\ mol\ of\ OH^{-}[/tex]

So,  [tex](2.50 \times 10^{-3} mol - 2.49 \times 10^{-3} mol)[/tex] i.e. [tex]1 \times 10^{-5}[/tex] mol of [tex]OH^-[/tex] in excess in total volume [tex](24.9+25.0) \ mL = 49.9 \ mL[/tex] i.e. concentration of [tex]OH^- = 2 \times 10^{-4}\ M[/tex]

[tex]p[OH^{-}] = -\log [OH^{-}] = -\log [2 \times 10^{-4}\ mol] = 3.70[/tex]

Since, [tex]pH + pOH = 14,[/tex]

so,

[tex]\to pH = 14- pOH = 14- 3.70 = 10.30[/tex]  

For point b:

moles of [tex]OH^-[/tex] = from point a [tex]= 2.50 \times 10^{-3} \ mol[/tex]

moles of [tex]H^+[/tex](from[tex]HNO_3[/tex]):

[tex]= 25.1 mL \times 0.100 M\\\\ = \frac{25.1}{1000}\ L \times 0.100 \ M\\\\ = 2.51\times 10^{-3} \ mol[/tex]

1 mol [tex]H^+[/tex] neutralizes 1 mol of [tex]OH^-[/tex]

So, [tex](2.51 \times 10^{-3}\ mol - 2.50 \times 10^{-3}\ mol)[/tex] i.e. [tex]1 \times 10^{-5} \ mol \ of\ H^+[/tex] in excess in the total volume of [tex](25.1+25.0) \ mL = 50.1\ mL[/tex] i.e. concentration of[tex]H^+ = 2 \times 10^{-4}\ M[/tex]

Hence, [tex]pH = -\log [H^+] = -\log[2 \times 10^{-4}] = 3.70[/tex]

Answer:

3.68 grams.

Explanation:

First we convert 9.5 g of NaCl into moles of NaCl, using its molar mass:

9.5 g ÷ 58.44 g/mol = 0.16 mol NaCl

In 0.16 moles of NaCl there are 0.16 moles of sodium as well.

We now convert 0.16 moles of sodium into grams, using sodium's molar mass:

0.16 mol * 23 g/mol = 3.68 g

Answer:

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.

Explanation:

Solution :

We know, molecular mass of NH₃ is , M = 17 g/mol .

Number of moles of NH₃ in 7.2 × 10²⁴ are :

[tex]n = \dfrac{7.2 \times 10^{24}}{6.022 \times 10^{23}}\\\\n = 11.96\ moles[/tex]

So, mass of NH₃ present in 11.96 moles is :

m = 11.96 × 17 gram

m = 203.32 gram

Hence, this is the required solution.

Answer:

Following are the responses to the given question:

Explanation:

In many analyses, the homogenous sample with only a particular identity group is desired. Units were picked here depending on their similar characteristics so because research is specifically interested in these qualities. The downside of a homogeneous sample is nevertheless that the exterior validity of a study is decreased. In other words, any results obtained could be appropriately widespread to the general population. On either hand, a heterogeneous sample is capable of overcoming this difficulty, because its diversity is the typical pattern of any sort of sample distortion inside the broader population.

Answer:

3.16x10²⁵ molecules

Explanation:

1 mol refers to the amount of a substance. The amount of C₂H₆ molecules (or any other substance) that are in one mol is given by Avogadro's number:

With that in mind we can calculate how many molecules are there in 52.5 moles:

Answer:

It's sunset because the sun sets in the west and rises in the east. The shadow is going west therefore the sun must be in the east. Also the shadow is super long meaning the sun has to be close to the horizon.

Explanation:

Answer:

as acid is added, the pH of a solution decreases and the hydronium acid concentration increases.

Explanation:

the pH & hydronium ion concentration of solution are inversely related by the equation pH=-log(H+).

Acids are hydronium donors, so when we add an acid to a solution, the hydronium in it will decrease.

Using the above equation, we can see that the more hydronium is added, the less the pH will be since there's a negative sign.

Answer:

The equilibrium position shifts to the right, in accordance to the constraint principle

Answer: 98.08 g/mol

Explanation:

i just took this test and got it right

Answer:

A

Explanation:

Answer:  (1) Inhales (breathes in) Oxygen - good for the body - gives it to the Circulatory System to be transported throughout the body through the blood. (1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go.

Answer:

D.) When HX adds to an asymmetrical alkene, the halogen attaches to the least substituted sp² carbon.

Explanation:

Which of the following statements is NOT true?

A.) When HX adds to an asymmetrical alkene, the sp² carbon bonded to the most H atoms is protonated. TRUE. This is known as Markovnikov's rule.

B.) When HX adds to an asymmetrical alkene, protonation leads to the most stable carbocation intermediate. TRUE. The order of stability of carbocations is tertiary > secondary > primary.

C.) When HX adds to a symmetrical alkene, either of the sp² carbons can be protonated. TRUE. Since the alkene is symmetrical, either carbon can be protonated.

D.) When HX adds to an asymmetrical alkene, the halogen attaches to the least substituted sp² carbon. FALSE. The halogen attaches to the most substituted sp² carbon.

Answer:

1 × 10−11 M

Explanation:

I took the test :) guy above me is right

Answer:

See explanation and image attached

Explanation:

2‑methylhept‑3‑yne can be made by the reaction of the compound shown in the image attached with soidamide in liquid ammonia and 1‑bromopropane.

The first step in the reaction is the deprotonation of the alkyne starting material by the amide ion.

This step is followed a nucleophilic substitution reaction of the alkyne with 1‑bromopropane to yield the 2‑methylhept‑3‑yne product.

Answer:

=64.73..

Explanation:

0.750=5L

9.71=x

0.750*x÷0.750=5L*9.71÷0.750

x=48.55÷0.750

x=64.73..

Answer:

Explanation:

Element       Electron configuration  Valence electron      Ion

                    for atom                          configuration

P               1s²2s²2p⁶3s²3p³             3s²3p³                        P⁵⁺

Sn           1s²2s²2p⁶3s²3p⁶4s²

               3d¹⁰4p⁶4d¹⁰5s²5p²           5s²5p²                       Sn⁴⁺      

Ni             1s²2s²2p⁶3s²3p⁶4s²         4s²3d⁸                       Ni²⁺

               3d⁸

Br             1s²2s²2p⁶3s²3p⁶4s²        4s²4d⁵                         Br⁻

                3d¹⁰4p⁵

O              1s²2s²2p⁴                         2s²2p⁶                        O²⁻

An atom's electron configuration is a depiction of the distribution of electrons amongst the orbital shells as well as subshells. The electron configuration is frequently used to define an atom's orbitals in its ground state, but it may also be used to depict an atom which has ionized into a negatively charged ion or positively charge ion by accounting for electron loss or gain in succeeding orbitals. Many of an element's physical and chemical features can be linked to its distinct electron configuration. The distinctive chemistry of the element is determined by the valence electrons, which are electrons in the outermost shell.

Answer:

The correct answer is -749.437 Kilojoules

Explanation:

In the case of nutrition, Kcal and cal are equal and each macromolecule produces a specific amount of energy in terms of calories. Carbohydrates and protein generate 4 kcal whereas fat generates 9 kcal per gram.

1 g of carbohydrate = 4 kcal

so, 2 gram of carbohydrate = 8 kcal

9 g of protein = 9*4

= 36 kcal

15 g of fat = 15*9

= 135 kcal

in total = 135 + 36 + 8 kcal

= 179 kcal

and, one kcal =  4.186798 kJ

so 179 kcal = 4.186798 * 179

= 749.437 Kilojoules

Answer:

The amount H2O produced is also halved

Explanation:

A strong acid as HCl reacts with a strong base as NaOH producing water and a salt, NaCl. The reaction is:

HCl + NaOH → NaCl + H₂O

Where 1 mole of HCl reacts per mole of NaOH to produce 1 mole of water.

That means, if the amount of HCl and NaOH is halved, the amount H2O produced is also halved because 1 mole of each reactant produce 1 mole of water

Answer:

ITS UPSIDE DOWN I CANT ANSWER IT

i will edit the answer if its normal

Explanation: