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3 years ago

Dalton hypothesized that atoms are indivisible and that all atoms of an element are identical. It is now known that _____.

2 answers:

34kurt3 years ago

8 0

Dalton hypothesized that atoms are indivisible and that all atoms of an element are identical. It is now known that <span>atoms are divisible. The answer is letter C</span>

Digiron [165]3 years ago

6 0

1. C. atoms are divisible

2. C. Electrons are distributed around the nucleus and occupy almost all of the volume of the atom

3. B. Protons

4. B. Number of protons

5. D. Mass numbers

6. C. Subtract the number of protons from the mass number

7. A. amu

8. B. The actual masses of atoms are very small and difficult to work with.

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Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate

Anvisha [2.4K]

Answer:

$-3272$ kJ/mol

Explanation:

Given and known facts

Mass of Benzene $= 0.187$ grams

Mass of water $= 250$ grams

Standard heat capacity of water $= 4.18$ J/g∙°C

Change in temperature ΔT $= 7.48$ °C

Heat

$=250 * 4.18 * 7.48\\=7816.6 \\=7.82$

Heat released by benzine is - 7.82 kJ

Now, we know that

$0.187$ grams of benzene release $= -7.82$ kJ heat

So, $1$ g benzine releases

$\frac{ -7.82 }{0.187}\\= -41.8$

kJ/g

$0.187 * \frac{1}{78.108}=0.00239$ mol C6H6

Heat released

$= \frac{-7.82}{ 0.00239}$

$=-3272$ kJ/mol

4 0

3 years ago

PLS HELP ASAP I WILL GOVE BRAINLYEST

Radda [10]

Answer:

4 genetically different daughter cells

Explanation:

in image

5 0

3 years ago

Which statement describes streak?

Oliga [24]

Answer:

Streak is tested by scraping a mineral across plate

Explanation: Hope this helps :)

5 0

3 years ago

Read 2 more answers

1 . a chemical bond formed by the electrostatic attraction between ions covalent bond

liberstina [14]

Explanation:

When there occurs sharing of electrons between two chemically combining atoms then it forms a covalent bond. Generally, a covalent bond is formed between two non-metals.

An ionic bond is defined as the bond formed due to transfer of one or more number of electrons from one atom to another. An ionic bond is always formed between a metal and a non-metal.

Every atom of an element will have orbitals in which electrons are found. These orbitals are known as energy level.

A molecule is defined as the smallest particle present in a substance or atom.

A metallic bond is formed due to mobile valence electrons shared by positive nuclei in a metallic crystal.

Thus, we can conclude that given statements are correctly matched as follows.

1). a chemical bond formed by the electrostatic attraction between ions - ionic bond

2). a chemical bond formed by two electrons that are shared between two atoms - covalent bond

3). the orbitals of an atom where electrons are found - energy level

4). the smallest particle of a covalently bonded substance - molecule

5). a bond characteristic of metals in which mobile valence electrons are shared among positive nuclei in the metallic crystal - metallic bond

7 0

3 years ago

How many significant figures are in 4.800x10-3?

seraphim [82]

4 after solving =0.004800 where 4,800 is the significant number

5 0

2 years ago