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3 years ago

What year will Aquarius be visible from Earth’s North Pole?

Chemistry

1 answer:

Minchanka [31]3 years ago

3 0

Answer:

Aquarius beginning in the mid-3rd millennium. The north and south celestial poles are the two imaginary points in the sky where the Earth's ... In about 5,500 years, the pole will have moved near the position of the star ... The south celestial pole is visible only from the Southern Hemisphere.

Explanation:

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Energy transfer by convection is usually restricted to what type of substance? A. Solids only

Lunna [17]

My thought would be B) gases.

I could be wrong but that's what i'd say

4 0

3 years ago

I. Give the name for the following compounds:

alexandr402 [8]

Answer:

Explanation:

1) MgBr₂

Magnesium bromide

2) Ca₃(PO₄)₂

Calcium phosphate

3) NO₂

Nitrogen dioxide

4) Ni₂(CO₃)₃

Nickel(III) carbonate

5) (NH₄)₂CO₃

Ammonium carbonate

6) MnBr₂

Manganese bromide

7) Na[MnO₄]

Sodium permanganate

8) P₂O₅

Phosphorus pentoxide

9) CCl₄

Carbon tetrachloride

10) Fe(OH)₂

Iron(ii) hydroxide

8 0

2 years ago

Compounds A, B, and C react according to the following equation. 3A(g) + 2B(g) 2C(g) At 100°C a mixture of these gases at equili

Vedmedyk [2.9K]

Answer:

The value of Kc for the reaction is 3.24

Explanation:

A reversible chemical reaction, indicated by a double arrow, occurs in both directions: reagents transforming into products ( direct reaction) and products transforming back into reagents (inverse reaction)

Chemical Equilibrium is the state in which direct and indirect reactions have the same reaction rate. Then taking into account the rate constant of a direct reaction and its inverse the chemical constant Kc is defined.

Being:

aA + bB ⇔ cC + dD

where a, b, c and d are the stoichiometric coefficients, the equilibrium constant with the following equation:

$Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }$

Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients divided by the multiplication of the concentrations of the reagents also raised to their stoichiometric coefficients.

Then, in the reaction 3A(g) + 2B(g) ⇔ 2C(g), the constant Kc is:

$Kc=\frac{[C]^{2} }{[A]^{3} *[B]^{2} }$

where:

[A]= 0.855 M
[B]= 1.23 M
[C]= 1.75 M

Replacing:

$Kc=\frac{1.75^{2} }{0.855^{3}*1.23^{2} }$

Solving you get:

Kc=3.24

The value of Kc for the reaction is 3.24

8 0

3 years ago

Sodium chloride is produced from its elements

Kisachek [45]

Answer:

Mass of Sodium = 574.75 g

Mass of Chlorine = 886.25 g

Explanation:

The balance chemical equation for the synthesis of NaCl is,

2 Na + Cl₂ → 2 NaCl

Step 1: Find out moles of each reactant required,

According to balance chemical equation,

2 moles of NaCl is produced by = 2 moles of Na

So,

25 moles of NaCl will be produced by = X moles of Na

Solving for X,

X = 25 mol × 2 mol / 2 mol

X = 25 moles of Na

Similarly for Cl₂,

According to balance chemical equation,

2 moles of NaCl is produced by = 1 mole of Cl₂

So,

25 moles of NaCl will be produced by = X moles of Cl₂

Solving for X,

X = 25 mol × 1 mol / 2 mol

X = 12.5 moles of Cl₂

Step 2: Convert each moles to mass as;

Mass = Moles × Atomic Mass

For Na,

Mass = 25 mol × 22.99 g/mol

Mass = 574.75 g

For Cl₂,

Mass = 12.5 mol × 70.90 g/mol

Mass = 886.25 g

6 0

3 years ago

Pinky put her wet clothes inside the room for drying. But her mom told her to put it under the sun. Give reason why her mom told

bulgar [2K]

so it doesn't get smaller

5 0

1 year ago