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4 years ago

Which two models would be most useful in predicting weather

Chemistry

1 answer:

nirvana33 [79]4 years ago

8 0

Answer:mathematical and map

Explanation:

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A chemical reaction that has a positive δg is best described as _____.

Ann [662]

A chemical reaction that has a positive g is best described as endergonic.

8 0

4 years ago

A 40 g gold coin is cooled from 50°C to 10°C (CAu is 0.13 J/g-°

Debora [2.8K]

When the Heat gain or lose = the mass * specific heat * ΔT

and when we have the mass of gold coin= 40 g

and the specific Heat of gold= 0.13 J/g°

and ΔT = (Tf- Ti) = 10°C - 50°C = -40 °C

so by substitution:

∴Heat H = 40 g * 0.13 J/g° * -40
= - 208 J

4 0

3 years ago

Suppose a current of flows through a copper wire for seconds. Calculate how many moles of electrons travel through the wire. Be

vagabundo [1.1K]

Answer:

1.20 × 10⁻³ mol e⁻

Explanation:

There is some info missing. I think this is the original question.

Suppose a current of 0.880 A flows through a copper wire for 132 seconds. Calculate how many moles of electrons travel through the wire. Be sure your answer has the correct unit symbol and round your answer to significant digits.

Step 1: Given data

Intensity of the current (I): 0.880 A (= 0.880 C/s)

Time elapsed (t): 132 s

Step 2: Calculate the charge, in Coulomb, that travel through the wire

We will find the circulating charge (q) using the following expression.

$q = I \times t = \frac{0.880C}{s} \times 132s = 116C$

Step 3: Calculate the moles of electrons with a charge of 116 C

We will use the relationship 1 mole of electrons = 96,486 C (Faraday's constant)

$116C \times \frac{1mol\ e^{-} }{96,486 C} =1.20 \times 10^{-3} mol\ e^{-}$

6 0

3 years ago

Which of the following would not be defined as an acid A.KOH, B. HNO3, D. H3PO4 and why

tigry1 [53]

B. HNO3 because it is copper and can not move the place of hydrogen's atom from the acid

3 0

3 years ago

Convert 7.9 x 10^22 atoms of Ca to grams

Vika [28.1K]

Answer:

Mass = 5.24 g

Explanation:

Given data:

Number of atoms of Ca = 7.9×10²² atoms

Mass of Ca = ?

Solution:

First of all we will calculate the number of moles by using Avogadro number.

1 mole contain 6.022×10²³ atoms

7.9×10²² atoms × 1 mol /6.022×10²³ atoms

1.31 ×10⁻¹ mol

0.131 mol

Mass of Ca:

Mass = number of moles × molar mass

Mass = 0.131 mol × 40 g/mol

Mass = 5.24 g

6 0

3 years ago

Which two models would be most useful in predicting weather​

Which two models would be most useful in predicting weather