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2 years ago

Mendeleev arranged the known chemical elements in a table according to increasing

Chemistry

1 answer:

vesna_86 [32]2 years ago

8 0

Atomic mass. Which is the number of protons and neutrons combined.

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What is the momentum of a cat of mass 4 kg that is running south with a speed of 1.5 m/s?

Ulleksa [173]

Answer:

option B is correct

Explanation:

momentum(p)=mv

mass= m=4 kg

velocity=v=1.5 m/s

P=4kg*1.5 m/s=6.0 kg.m/s

so option B is correct

3 0

3 years ago

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This group of fungi forms spores in a round structure on the end of a hyphae

r-ruslan [8.4K]

Answer:

Is zygote fungi an option??

3 0

2 years ago

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MATCH

almond37 [142]

I wanna say it would be 1 would be A 2 would be C 3 would be D 4 would be B and 5 would be E

hope this helps

6 0

3 years ago

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This kind of bond is formed when an atom with low electronegativity donates electrons to an

Butoxors [25]

Answer:

Ionic Bond

Explanation:

The atom with the higher electronegativity wants to fill its valence electron shell (meaning it wants 8 electrons in this shell). The atom with lower electronegativity will want to empty <em>or donate </em>an electron so that it can have an empty valence shell.

3 0

2 years ago

Consider the following equilibrium: H2CO3+H2O = H3O+HCO3^-1. What is the correct equilibrium expression?

mylen [45]

Equilibrium expression is $Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\$

<u>Explanation:</u>

Equilibrium expression is denoted by Keq.

Keq is the equilibrium constant that is defined as the ratio of concentration of products to the concentration of reactants each raised to the power its stoichiometric coefficients.

Example -

aA + bB = cC + dD

So, Keq = conc of product/ conc of reactant

$Keq = \frac{[C]^c [D]^d}{[A]^a [B]^b}$

So from the equation, H₂CO₃+H₂O = H₃O+HCO₃⁻¹

$Keq = \frac{[H3O^+]^1 [HCO3^-]^1}{[H2CO3]^1 [H2O]^1}$

The concentration of pure solid and liquid is considered as 1. Therefore, concentration of H2O is 1.

Thus,

$Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\$

Therefore, Equilibrium expression is $Keq = \frac{[H3O+][HCO3^-]}{[H2CO3]}\\$

4 0

2 years ago