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Mariulka [41]
2 years ago
13

Who wants to be mine

Chemistry
1 answer:
andrew11 [14]2 years ago
8 0

hellow! how r you? 。◕‿◕。

Explanation:

nice to know you then:)

You might be interested in
Part 1: Name the type of chemical reaction that occurs when calcium hydroxide (Ca(OH)2) reacts with nitric acid (HNO3).
liberstina [14]

<u>Answer:</u>

<u>For 1:</u> Neutralization reaction

<u>For 2: </u>Zinc is more reactive than lead and less reactive than calcium.

<u>Explanation:</u>

  • <u>For (1):</u>

When a base reacts with an acid to form a salt and water molecule, it is known as a neutralization reaction. The general equation follows:

HX+BOH\rightarrow BX+H_2O

The chemical equation for the reaction of calcium hydroxide and nitric acid follows:

Ca(OH)_2(aq)+2HNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+2H_2O(l)

  • <u>For (2):</u>

A single displacement reaction is defined as the reaction in which a more reactive metal displaces a less reactive metal from its salt solution. The general chemical equation follows:

A+BX\rightarrow AX+B

where,

Metal A is more reactive than metal B

The reactivity of metals is judged by the reactivity series where a metal lying above in the series is more reactive than the metal lying below it.

From the reactivity series below,

Zinc lies above in the series than lead thus is more reactive and will easily replace lead from its aqueous solution.

While zinc lies below in the series than calcium thus is less reactive and will not easily replace calcium from its aqueous solution.

Zn(s)+Pb(NO_3)_2(aq)\rightarrow Zn(NO_3)_2(aq)+Pb(s)

Zn(s)+CaCl_2(aq)\rightarrow \text{No reaction}

5 0
3 years ago
An average person expends about 845 kilojoules of energy per hour of walking. Suppose a person eats 2 baked potatoes with butter
ExtremeBDS [4]

Answer:

         \large\boxed{2hours}

Explanation:

You will need to use the conversion between food calories, calories and joules.

       1\text { nutritional calorie }= 1,000cal\\ \\ 1cal=4.184joule

From a nutritional table (from the internet) you can obtain the amount of nutritional calories for each type macronutrient:<em> carbohydrates, protein, and fat.</em>

Macronutrient      food calories

Carbohydrate         4 cal/g

Protein                    4 cal/g

Fat                           9 cal/g

To convert food calories to regular calories, mutiply by the conversion factor:

                1=1,000cal/\text{nutritional calorie}

Macronutrient        calories

Carbohydrate         4,000 cal/g

Protein                    4,000 cal/g

Fat                           9,000 cal/g

To convert regular calories to joules, multiply by the conversion factor:

               1=4.184 joule/1cal

Macronutrient        energy in joules

Carbohydrate         16,736 joule/g

Protein                    16,736 joule/g

Fat                           37,656 joule/g

Now you can multiply the grams of each macronutrient in one potato by its energy content:

Macronutrient        energy/gram     ×   grams  =  total energy

Carbohydrate         16,736 joule/g   ×   37 g      =  619,232 joules

Protein                    16,736 joule/g   ×   4.3 g     =  71,968.8 joules

Fat                           37,656 joule/g  ×   4 g        = 150,624 joules

Total = 619,232 joules + 71,968.8 joules + 150,624 joules = 841,820.8 joules.

Since they are <u>two potatoes</u>, multiply by 2: × 841,820.8 joules = 1,683,641.6 joules.

Divide by 1,000 to convert to kilojoules = 1,683.64 kilojoules

Divide the total energy from the two potatoes by the <em>energy that an average person expend per hour of walking (845 kilojoules of energy per hour):</em>

       1,683.64kilojoules/845kilojouesl/hour=1.99hours\approx 2hours

7 0
3 years ago
What is the name for C2I3
Sidana [21]

Answer: The correct name for the compound C_2I_3  is, Dicarbon triiodide.

Explanation:

C_2I_3 is a covalent compound because in this compound the sharing of electrons takes place between carbon and iodine.. Both the elements are non-metals. Hence, it will form covalent bond.

The naming of covalent compound is given by:

The less electronegative element is written first.

The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.

If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.

Hence, the correct name for the compound C_2I_3  is, Dicarbon triiodide..

4 0
2 years ago
Why does food need to be digested
OLga [1]

Answer:

Food has to be digested into smaller component nutrients that are then absorbed and used throughout your body. Calories in food provide your body with the energy it needs to complete vital processes such as cellular maintenance and reproduction, and respiration.

Explanation:

can i have a brainlist :)

5 0
3 years ago
Read 2 more answers
Why a finely powdered sample should be used in a melting point measurement?
lapo4ka [179]

because it a essential for good heat transfer

6 0
3 years ago
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