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3 years ago

How many moles are in 25g of CO2? With calculation show please

Mathematics

2 answers:

GuDViN [60]3 years ago

5 0

Here’s the answer! Let me know if you have any questions

goldenfox [79]3 years ago

3 0

Answer:

0.568 moles (3 s.f.)

Step-by-step explanation:

no. of moles= mass ÷mr

Mr (molecular mass) is the sum of atomic masses of the atoms in the compound. The atomic mass can be found from the periodic table.

Mr of CO₂

= 12 + 2(16)

= 44 amu

Thus, no. of moles

= 25 ÷44

= 0.568 moles (3 s.f.)

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3 years ago

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Aleksandr [31]

Just answers since long and many simplifiction
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3 years ago

Kyla makes a triangular school pennant. The area of the triangle is 180 square inches. The base of the pennant is z inches long.

kykrilka [37]

We can represent the base as z and the height as 2z+6. We are going to use the formula A=1/2*b*h and solve for z
180=1/2*z*(2z+6)
360=2z^2+6z
0=2z^2+6z-360
0=2(z^2+3z-180)
0=(z+15)(z-12)
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3 years ago

Find the indicated probability. Round to three decimal places. The participants in a television quiz show are picked from a larg

Arturiano [62]

Answer:

0.033

Step-by-step explanation:

Use binomial probability:

P = nCr pʳ (1−p)ⁿ⁻ʳ

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1-p).

Here, p = 0.5, q = 0.5, and n = 11.

We need to find P when r is 0, 1, and 2, then add up the results to get the total probability.

r = 0:

P = ₁₁C₀ (0.5)⁰ (0.5)¹¹⁻⁰

P ≈ 0.0005

r = 1:

P = ₁₁C₁ (0.5)¹ (0.5)¹¹⁻¹

P ≈ 0.0054

r = 2:

P = ₁₁C₂ (0.5)² (0.5)¹¹⁻²

P ≈ 0.0269

Therefore, the total probability is:

P = 0.0005 + 0.0054 + 0.0269

P = 0.0328

Round to the thousandths place, the probability is 0.033.

3 0

3 years ago

Any thoughts im really confused on it

wariber [46]

In step two he flipped the fraction back to how it was originally but he was supposed to leave it improper in order to multiply

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3 years ago