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3 years ago

Match these items. 1. kg measurement of area 2. cm 2 measurement of length 3. L measurement of mass 4. m measurement of volume

Chemistry

1 answer:

Phoenix [80]3 years ago

4 0

Answer:

Kg measurement of volume.

cm measurement of area

L measurement of length

m measurement of maes

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Use the bond energy to calculate an approximate value of ΔH for the following reaction. Which is the more stable form of FNO2?

Phoenix [80]

The Lewis structures in which there are no formal charges is the most stable. Hence, structure (b) is the more stable form of FNO2.

<h3>Lewis structure</h3>

The question is incomplete but I will try to answer you as much as I can. Now the equation is missing hence we can't numerically caculate the enthalpy chnage of the reaction from bond energies. However, we can do this using the formula; Σbond energy of reactants - bond energy of products.

Concerning the Lewis structures of FNO2, the most stable structure is structure (b) as shown in the image attached where the atoms have no formal charges.

Learn more about Lewis structure:brainly.com/question/4144781

8 0

3 years ago

The atoms of some radioactive isotopes, or radioisotopes, are used in scientific studies. They are called _______.

lys-0071 [83]

Radioactive Isotopes

Hope this helps

7 0

4 years ago

Before we begin, let's first establish an understanding of basic terminology It may be harder than you think lo clearly define w

pentagon [3]

Answer:

oranges: contains chemical

heat: neither

sunlight: neither

photosynthesis: chemical reaction

bleaching protein: contains chemical

neutralization: chemical reaction

combustion: chemical reaction

vitamin K: contains chemical

rainbow: neither

marble: contains chemical

Explanation:

A chemical is a substance that is used in or made by chemical reactions. It is a matter with compositions related to the science of chemistry. In the question,

- orange contains chemical like vitamins, protein molecules etc.

- Bleaching protein contains chemicals that bring about the bleaching process.

- Vitamin k contains chemical elements

- marble contains Calcium, oxygen etc elements

A chemical reaction is that which involves the change in chemical properties of involved substances.

- Photosynthesis is the chemical reaction between carbon dioxide and water in the presence of sunlight to give glucose.

- Neutralization is the chemical reaction where an acid neutralizes a base to form a salt and water molecule.

- Combustion is the chemical reaction involving the burning of a chemical substance.

Some substances like sunlight, heat and rainbow are neither a chemical or chemical reaction.

3 0

3 years ago

What is the valence electron of manganese?

DIA [1.3K]

Answer:

25th electron

Explanation:

the last electron is the valence electron. Assuming it has equal numbers of protons and electrons, then the 25th electron is the valence.

6 0

3 years ago

Read 2 more answers

What mass of water will change its temperature by 3.0 0C when 525 J of heat is added to it? The specific heat of water is 4.184

pav-90 [236]

Answer:

Mass of water = 41.8 g

Explanation:

Given data:

Mass of water = ?

Change in temperature = 3.0 °C

Specific heat capacity = 4.184 j/g.°C

Heat absorbed = 525 j

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 3.0°C

Now we will put the values in formula.

525 J = m × 4.184 j/g.°C × 3.0°C

525 J = m × 12.552 j/g

m = 525 J/ 12.552 j/g

m = 41.8 g

4 0

3 years ago