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Irina-Kira [14]

2 years ago

11

Identical rock types, identical fossils, and very similar mountain ranges are found on different continents that are separated b

y a wide ocean. Which of these best explains these observations?

2 answers:

storchak [24]2 years ago

6 0

I can’t see the picture for some reason but if I were to guess, I would say Pangea.

enyata [817]2 years ago

3 0

I’m confused about this question

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Name two liquid fuels obtained from petroleum

Ratling [72]

Answer:

Diesel and kerosene.

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2 years ago

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How many milliliters of a 0.285 M HCl solution are needed to neutralize 249 mL of a 0.0443 M Ba(OH)2 solution?

meriva

Answer:

$\large \boxed{\text{77.4 mL}}$

Explanation:

Ba(OH)₂ + 2HCl ⟶ BaCl₂ + H₂O

V/mL: 249

c/mol·L⁻¹: 0.0443 0.285

1. Calculate the moles of Ba(OH)₂

$\text{Moles of Ba(OH)$_{2}$} = \text{0.249 L Ba(OH)}_{2} \times \dfrac{\text{0.0443 mol Ba(OH)}_{2}}{\text{1 L Ba(OH)$_{2}$}} = \text{0.011 03 mol Ba(OH)}_{2}$

2. Calculate the moles of HCl

The molar ratio is 2 mol HCl:1 mol Ba(OH)₂

$\text{Moles of HCl} = \text{0.011 03 mol Ba(OH)}_{2} \times \dfrac{\text{2 mol HCl}}{\text{1 mol Ba(OH)}_{2}} = \text{0.022 06 mol HCl}$

3. Calculate the volume of HCl

$V_{\text{HCl}} = \text{0.022 06 mol HCl} \times \dfrac{\text{1 L HCl}}{\text{0.285 mol HCl}} = \text{0.0774 L HCl} = \textbf{77.4 mL HCl}\\\\\text{You must add $\large \boxed{\textbf{77.4 mL}}$ of HCl.}$

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2 years ago

Can someone answer the bottom question (22-25)

Sindrei [870]

22) Oxygen with a -2 charge
23) Neon with a +2 charge
24) Fluorine with a -1 charge
25) Lithium with a +1 charge

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2 years ago

A bond formed between a fluorine, F, atom and a fluorine, F, atom is likely to be____

nikklg [1K]

Answer:

c) non polar Covalent

Explanation:

this is a molecule formed by atoms of the same element . they both have similar electronegativities and thus cancel out . This makes it a perfect Covalent molecule . The fact that it's a symmetrical molecule makes it non polar. a symmetrical molecule is a molecule formed by the overlap of orbitals of two atoms of the same element ( that is to say , there's no dipole )

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2 years ago

What is the density of an object with a volume of 12 mL and a mass of 38g?

Andreas93 [3]

Answer:

Hi im an online tutor and I can assist you with all your assignments. we have professionals in all fields. Check out our website https://toplivewriters.com

Explanation:

5 0

1 year ago