I need help with the first question, if you can help with the other two I would really appreciate it!​

Answer:

[tex]m_{NaI}=104gNaI[/tex]

Explanation:

Hello there!

In this case, given the balanced chemical reaction, it is possible to evidence that the mole ratio of sodium iodide to iodine is 2:1 and the molar masses are 149.89 and 253.81 g/mol respectively; in such a way, we write the following stoichiometric setup in order to obtain the required grams of sodium iodide:

[tex]m_{NaI}=87.9gI_2*\frac{1molI_2}{253.81gI_2}*\frac{2molNaI}{1molI_2}*\frac{149.89gNaI}{1molNaI} \\\\m_{NaI}=104gNaI[/tex]

Regards!

Answer:

pH=12.88  i believe that's the answer

Answer:

Desertification?

Explanation:

Desertification is when fertile lands become desert like

Answer:

Answer... Option B. Oxygen is usually -2; except in Peroxides

Answer:

Heyaa!! I'm *✧･ﾟ:*Pinky!! *:･✧ And i'm here to inform you that you're answer is...

Explanation:

✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:✧*:✧✧･ﾟ:*✧･ﾟ:*✧･ﾟ:

*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:✧*:✧*:･ﾟ･ﾟ

  *:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧    !!!!! Answer: add more solvent to decrease the concentration. A stock solution is a concentrated form of a particular chemical. To make a solution from the stock solution, a required amount of the stock solution has to be taken out and this will be diluted with pre-calculated amount of the correct solvent !!!! *:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧

✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:✧*:✧✧･ﾟ:*✧･ﾟ:*✧･ﾟ:

*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:･ﾟ✧*:･ﾟ*:･ﾟ✧✧･ﾟ: *✧･ﾟ:**:✧*:✧*:･ﾟ･ﾟ

                           Have An Amazingly Good Day!!

                                                   ~Pinky~                                                                            

Answer:

Its physical structure

Explanation:

Answer: Glucose is a simple sugar with six carbon atoms and one aldehyde group.

Explanation: hope this helps you

Answer:

the answer of this is glucose

Answer:

4.9cm or 4.90cm

Explanation:

Use column method and align the numbers. Make sure you add the decimal point before you write the answer, otherwise the value would be wrong.

Answer:

4.90

Explanation:

8.45.

-3.55

minus those two and you'll get the sum!

Answer:

Due to the presence of 4 valence electrons.

Explanation:

The tetrahedral arrangement of bonds formed by carbon and its relevance In the interaction of biomolecules occurs because the carbon atom has four electrons in their outermost shell and the four hydrogens has one electron each which result is a total of eight electrons distributed in four bonding orbitals making the structure of tetrahedral and the bond angles between these carbon atoms is approximately 109.5 degree.

Answer:  The volume at 600 K will be 0.050 L.

Explanation:

Given: [tex]V_{1}[/tex] = 0.025 L,    [tex]T_{1}[/tex] = 300 K

[tex]V_{2}[/tex] = ?,             [tex]T_{2}[/tex] = 600 K

Formula used is as follows.

[tex]\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}[/tex]

Substitute the values into above formula as follows.

[tex]\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{0.025 L}{300 K} = \frac{V_{2}}{600 K}\\V_{2} = 0.050 L[/tex]

Thus, we can conclude that the volume at 600 K will be 0.050 L.

Answer:

pH = 0.903.

Explanation:

Hello there!

In this case, according to the given information about the problem, we can notice there is a reaction between nitric acid and ammonia, whereas just the H ions from the former are relevant:

[tex]NH_3(aq)+H^+(aq)\rightleftharpoons NH_4^+(aq)[/tex]

Thus, we first calculate the consumed moles of ammonia, it order to evaluate the moles after the reaction:

[tex]n_{H^+}=0.020L*1.00mol/L=0.020mol\\\\n_{NH_3}=0.100L*0.050mol=0.005mol[/tex]

It means there is a leftover of moles of hydrogen ions of 0.015mol; then, we calculate the molarity of the resulting solution as follows:

[tex][H^+]=\frac{0.015mol}{0.120L}=0.125M[/tex]

Finally, we use the formula for the calculation of the pH to obtain:

[tex]pH=-log(0.125)\\\\pH=0.903[/tex]

Which means this solution is highly acidic.

Regards!

Answer:

Adaptation

Explanation:

Some plants grow and survive in the harshest environments like the desert or underwater by adapting to the environment. For example, some plants in the desert have thick, waxy skin to reduce loss of water and to reflect heat. They also have large, fleshy stems to store water.  Also, specific plants like cacti in the desert have spikes to protect them from animals wishing to use stored water. These adaptations help them to grow and survive in the desert.

In the ocean, plants have adapted to absorb all the water and carbon dioxide they need from the water they live in. Just as cacti have adapted to live in brutally hot deserts, ocean plants have adapted to deal with things like ocean tides and the salinity (or salt levels) of the water around them. Many ocean plants cling tightly to rocks in order to avoid being swept away by ocean tides.

Hope this helps! Can I have brainliest?

Answer:

The correct answer is B

Explanation:

Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

Genetic engineering is the process in which we alter the genetic makeup of an organism to produce desired characterictics in that organism.

So we can conclude that Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

Learn more about here Genetic engineering: https://brainly.com/question/2780091

Answer:

Hydroelectricity, or hydroelectric power, is electricity produced from hydropower. In 2015, hydropower generated 16.6% of the world's total electricity and 70% of all renewable electricity, and was expected to increase by about 3.1% each year for the next 25 years.

Explanation:

Answer:

The electricity which is produced from flowing water or from the force exerted by the flowing water is called Hydroelectricity..

hope it is helpful to you

Answer:

The answer is a gamma particle.

Answer:

beta particle

Explanation:

Answer: capsaicin C18 H27 NO3

Explanation: I just know the last one sorry G

Explanation:

P1V1 = P2V2

(100.7 kPa)(0.75 L) = (99.8 kPa)V2

V2 = (100.7 kPa)(0.75 L)/(99.8 kPa)

= 0.757 L

Answer:

wavelength

Explanation:

Answer:

false

Explanation:

metal such as copper, silver, etc conducts heat and electricity. an object such as a rock, plastic, paper does NOT conduct heat.

Answer:

the number of neutrons available is 30

Explanation:

Given that

The atomic number is 26

And, the mass number is 56

We need to determine the number of neutrons does it have

So, the number of neutrons is

= Mass number - atomic number

= 56 - 26

= 30

Hence, the number of neutrons available is 30

The same would be considered and relevant

Answer: Clouds are composed of liquid suspended water droplets in about a 100% RH environment. The three primary ways that clouds dissipate is by (1) the temperature increasing, (2) the cloud mixing with drier air, or (3) the air sinking within the cloud. Many things can increase the temperature of the cloud, like the sun, or warm air radiating off of the ground. That's why low fog and clouds tend to disappear as it warms up during the day. ... The air within the cloud descends - When the air descends, it warms.

Explanation:

Answer:

iodine = I

sodium= Na

oxygen= O2

aluminum = AI

nitrogen=N

sulfur= S

bromine =Br

magnesium =Mg

Answer:

Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity. Every factor in an ecosystem depends on every other factor, either directly or indirectly.

Answer:

1.They are reliable.

2.They dont vary from person to person

Answer:

[tex]t=46.13days[/tex]

Explanation:

Hello there!

In this case, since the radioactive decay is considered as first-order kinetic model, whereby the remaining mass of the radioactive material involves the initial one, the rate constant and elapsed time:

[tex]A=Ao*exp(-kt)[/tex]

As we were not initially given the rate constant, we can use the half-life to calculate it as follows:

[tex]k=\frac{ln(2)}{8.040days}=0.08621days^{-1}[/tex]

Thus, we can calculated the elapsed time for the given conditions to obtain:

[tex]t=\frac{ln(0.75g/40.0g)}{-0.08621days^{-1} }\\\\t=46.13days[/tex]

Regards!

Answer:C

Explanation:

Got it right in usatestprep

The physical evidence that indicates that there has been a chemical reaction is that the beaker changes temperature and the correct option is option C.

Neutralization is a chemical reaction in which acid and base react to form salt and water. Hydrogen (H⁺) ions and hydroxide (OH⁻ ions) react with each other to form water.

The strong acid and strong base neutralization have a pH value of 7.

The beaker gets warm which indicates that the reaction between acid and base is an exothermic reaction releasing heat energy into the surroundings.

Therefore, The physical evidence that indicates that there has been a chemical reaction is that the beaker changes temperature and the correct option is option C.

Learn more about Neutralization reaction, here:

https://brainly.com/question/28970253

#SPJ2

Answer:

Option A) Formation of an adduct.

Explanation:

Lewis acid-base concept have the following characteristics except? Option A. Have a great day .

The Lewis acid -base concepts states that acid are electron acceptors and bases are electron donors. Hence, this concept is based on the donation and acceptance of electron pair. Thus, option C is correct.

According to Lewis concept of acids and bases acids are substances tends to accepts electrons and bases are electron donors. Therefore, Lewis acids are electron deficient or electrophiles.

Similarly Lewis bases are electron rich or nucleophiles. For example BF₃ is a Lewis acid and NH₃ is a Lewis base. Hence,  BF₃ can accept electron from the lone pair of nitrogen from the Lewis base NH₃. and forms the acid-base pair NH₃ - BF₃.

Lewis acid- base concepts thus states the donation and acceptance of an electron pair. Hence, option C is correct.

To find more on Lewis concept, refer here:

https://brainly.com/question/15717190

#SPJ2

Explanation:

remember the equation percentage yield = actual/theoretical yield

so 6.26/18.81 X 100 gives u 33.28017012 so to 3 SF ot would be 33.3%

hope this helps:)

The statement, that describes the percent yield is 33.280 g.

The percent yield is the ratio of actual yield to theoretical yield. It is computed by dividing the experimental yield by the theoretical yield and multiplying the result by 100 percent. If the actual and theoretical yields are equal, the percent yield is one hundred percent.

To express the efficiency of a reaction, use the following formula: percent yield

= (actual yield/theoretical yield) x 100

= (6.26 g/ 18.81 g) x 100

= 33.280 g

Hence the correct answer is 33.280 g.

Learn more about percent yield here

https://brainly.in/question/5487028

#SPJ2

Answer:

discoveries that can change little aspects of our daily lives or finding cures for diseases that have hounded humanity, scientists have been hard at work trying to push us toward a brighter future.

Explanation:

thats what i got from my research :D