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3 years ago

(Subject is actually 8th Grade Science But The don't have that... i'm sorry.)

Chemistry

2 answers:

Ne4ueva [31]3 years ago

6 0

The smallest will have the greatest potential energy

Natasha_Volkova [10]3 years ago

5 0

Answer:

I am Going to say the smallest im in 8th grade and i got that right

Explanation:

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***Question in photo*** Is the entropy positive or negative in this question?

Kamila [148]

Answer:

Enthalpy change is negative

Entropy change is Positive

Explanation:

4 0

3 years ago

1.5mol C3H8 from C3H8+5O2-->3CO2+4H2O .how many grams of carbon dioxide are produced

koban [17]

Answer:

$\large \boxed{\text{200 g CO}_{{2}}}$

Explanation:

We will need a balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.

Mᵣ: 44.01

C₃H₈ + 5O₂ ⟶ 3CO₂ + 4H₂O

n/mol: 1.5

1. Calculate the moles of CO₂

The molar ratio is 3 mol CO₂:1 mol C₃H₈

$\rm \text{Moles of CO}_{2} = \text{1.5 mol C$_{3}$H}_{8} \times \dfrac{\text{3 mol CO}_{2}}{\text{1 mol C$_{3}$H}_{8}} =\text{4.5 mol CO}_{2}$

2. Calculate the mass of CO₂.

$\text{Mass of CO}_{2} = \text{4.5 mol CO}_{2} \times \dfrac{\text{44.01 g CO}_{2}}{\text{1 mol CO$_{2}$}} = \textbf{200 g CO}_{\mathbf{2}}\\\text{The reaction will form $\large \boxed{\textbf{200 g CO}_{\mathbf{2}}}$}$

3 0

2 years ago

What do greenhouse gases (CO2) do to the atmosphere?

Alborosie

Answer:

they causes climate change by trapping heat and also they contribute to respiratory diseases from smog and air pollution

4 0

3 years ago

Read 2 more answers

Help? for me? yes? please?

Sladkaya [172]

Answer:

2 Mg + O2 -> 2 MgO

is a synthesis reaction.

6 0

3 years ago

Boron B 10.811 Number of neutrons

andrew-mc [135]

Answer:

Explanation:

To determine the number of neutrons we round 10.8 to 11 and subtract the atomic number (5) and get 6; therefore, boron has 6 neutrons.

7 0

3 years ago