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2 years ago

I need help. It’s due tonight. Thanks

Chemistry

2 answers:

VikaD [51]2 years ago

4 0

Answer:

(a) Streptococcus - Pro

(b) Yeast - Euk

(d) Acidophilus -Pro

shepuryov [24]2 years ago

4 0

All of them are prokaryotes except for yeast because it’s cells have membrane bound nuclei

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90 POINTSSSS!!!

Katarina [22]

Answer:

$\large \boxed{\text{-2043.96 kJ/mol}}$

Explanation:

Assume the reaction is the combustion of propane.

Word equation: propane plus oxygen produces carbon dioxide and water

Chemical eqn: C₃H₈(g) + O₂(g) ⟶ CO₂(g) + H₂O(g)

Balanced eqn: C₃H₈(g) + 5O₂(g) ⟶ 3CO₂(g) + 4H₂O(g)

(a) Table of enthalpies of formation of reactants and products

$\begin{array}{cc}\textbf{Substance} & \textbf{$\Delta_{\text{f}}$H/(kJ/mol}) \\\text{C$_{3}$H$_{8}$(g)} & -103.85 \\\text{O}_{2}\text{(g)} & 0 \\\text{CO}_{2}\text{(g)} & -393.51 \\\text{H$_{2}$O(g)} & -241.82\\\end{array}$

(b)Total enthalpies of reactants and products

$\Delta_{\text{rxn}}H^{\circ} = \sum \left( \Delta_{\text{f}} H^{\circ} \text{products}\right) - \sum \left (\Delta_{\text{f}}H^{\circ} \text{reactants} \right)\\= \text{-2147.81 kJ/mol - (-103.85 kJ/mol)}\\= \text{-2147.81 kJ/mol + 103.85 kJ/mol}\\= \textbf{-2043.96 kJ/mol}\\\text{The enthalpy change is $\large \boxed{\textbf{-2043.96 kJ/mol}}$}$

ΔᵣH° is negative, so the reaction is exothermic.

5 0

2 years ago

____ Are subatomic particles found in the nucleus and carry positive electrical charge.

Angelina_Jolie [31]

C. Protons
Protons are subatomic particles found in the nucleus and carry positive electrical charge.

7 0

3 years ago

Read 2 more answers

What happens to the number in a measurement that is converted from kilometers to meters

Sergeeva-Olga [200]

You multiply the number by 1000 when you convert a measurement from kilometres to metres.

The prefix kilo means ×1000, so

1 kilometre means 1 metre ×1000.

3 0

2 years ago

Protons and neutrons are found in the nucleus. these two types of charges are referred to collectively as _____

solmaris [256]

Answer:

Nucleon

Explanation:

4 0

3 years ago

What is the overall ionic equation for zinc + silver nitrate?

3241004551 [841]

Answer:

Zn(NO₃)₂

Explanation:

this single replacement reaction will produce silver metal, Ag , and aqueous zinc nitrate, Zn(NO3)2 . Zinc is above silver is the metal reactivity series, so it will replace silver in silver nitrate

7 0

2 years ago