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Bess [88]
2 years ago
13

How did Ptolemy's model of the solar system explain the apparent changes in speed and direction of the planets?

Chemistry
1 answer:
strojnjashka [21]2 years ago
5 0

Answer:C. Then plants spun on epicycles

Explanation:don't have one I just checked through it on my screen.

Hope it helps

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A pressure of 725 mmhg is equal to how many atms
STatiana [176]
0.953948 is what I got from dividing pressure value by 760.
3 0
3 years ago
2 NH3 + 3 CuO →3 Cu + N₂ + 3 H₂O
Tatiana [17]

40.1g of nitrogen gas is produced.

The equation given is

2 NH₃ + 3 CuO →3 Cu + N₂ + 3 H₂O

This equation is already balanced.

When 3 moles of CuO are consumed, 1 mole of nitrogen gas is produced.

We get 1 mole of nitrogen from 3 moles of copper oxide.

We need to find the number of moles of nitrogen gas produced when 4.3 moles of copper oxide are consumed.

4.3/3 x 1 = 1.433 mols

  • 1.433 mols of nitrogen gas are produced
  • The molar mass of nitrogen gas is 14+14 = 28g
  • The amount of nitrogen gas produced in grams is 28x1.433 = 40.1g

40.1g of nitrogen gas can be made when 4.3 moles of CuO are consumed.

Learn more about molarity here:

brainly.com/question/24305514

#SPJ10

5 0
1 year ago
5. How much heat is evolved when 24.9 g of propanol (C3H7OH) is burned? ΔHcomb = −2010 kJ/mol
3241004551 [841]

Answer:

At the global scale, they are a significant source of emitted carbon, contributing to global warming which could lead to biodiversity changes. ... The consequence of repeated burns is detrimental because it is a key factor in the impoverishment of biodiversity in rain forest ecosystems.

7 0
3 years ago
HELPP! pls
pshichka [43]

Answer:

"2.48 mole" of H₂ are formed. A further explanation is provided below.

Explanation:

The given values are:

Mole of Al,

= 3.22 mole

Mole of HBr,

= 4.96 mole

Now,

(a)

The number of mole of H₂ are:

⇒  \frac{Mole \ of \ H_2}{3} =\frac{Mole \ of HBr}{6}

or,

⇒  Mole \ of \ H_2=\frac{1}{2}\times Mole \ of \ HBr

⇒                      =\frac{1}{2}\times 4.96

⇒                      =2.48 \ mole

(b)

The limiting reactant is:

= HBr

(c)

The excess reactant is:

= Al

6 0
2 years ago
The starting molecule for the krebs cycle is
Delicious77 [7]

Answer:

acetyl CoA

Explanation:

The starting molecule for the krebs cycle is acetyl CoA.

3 0
3 years ago
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