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3 years ago

This is our main source of heat

Chemistry

1 answer:

gogolik [260]3 years ago

5 0

Answer:

The sun is our main source of heat and light energy. A source is where something comes from. The heat we feel and the light we see here on Earth is mainly from our nearest star, the sun.

Explanation:

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When water droplets in a cloud combine, become too heavy, and fall to the ground as snow, sleet or hail, we are experincing what

Elza [17]

That would be known as precipitation.

8 0

4 years ago

A sample of nitrosyl bromide (nobr) decomposes according to the equation 2nobr(g)⇌2no(g)+br2(g) an equilibrium mixture in a 5.00

Alex73 [517]

Answer:

Kc = 0.122.

Explanation:

We can calculate Kc from the relation: Kc = [NO]².[Br₂] / [NOBr]².

Firstly, we convert the number of grams of each component to moles using <em>(n = mass / molar mass)</em>.

n of NOBr = (3.26 g / 109.8 g/mole) = 0.03 moles.

n of NO = (3.06 g / 29.9 g/mole) = 0.102 moles.

n of Br₂ = (8.15 g / 159.9 g/mole) = 0.051 moles.

Then we can get the concentration of each component by dividing its no. of moles by the volume of the vessel <em>(concentration = n / V)</em>.

The concentration of NOBr = (0.03 mole / 5.00 L) = 6x10⁻³ mol/L.

The concentration of NO = (0.102 mole / 5.00 L) = 2x10⁻² mol/L.

The concentration of Br₂ = (0.051 mole / 5.00 L) = 1x10⁻² mol/L.

Now, we can get Kc:

Kc = [NO]².[Br₂] / [NOBr]² = (2x10⁻² mol/L)².(1x10⁻² mol/L) / (6x10⁻³ mol/L)² = 0.122.

7 0

4 years ago

An aqueous solution has a hydrogen-ion concentration of 5.0 x 10^-6M.

andrey2020 [161]

Answer: 5.3

Explanation:

i took the test and got a 100 hope this helps :)

5 0

3 years ago

90 grams of glucose, C6H12O6, is dissolved in 2 liters of solution. Determine the molarity (M).

Masja [62]

Answer:

0.25 M

Explanation:

The first step is to determine how many moles of glucose there are, which means first finding out the molar mass of glucose. Carbon has a molar mass of about 12, hydrogen 1, and oxygen 16, so the total molar mass of glucose is about 6(12)+12(1)+6(16)=180 grams. This means that 90 grams is half a mole. Half a mole of substance divided by two liters of solution is (1/2)/2=1/4, or a molarity of 0.25. Hope this helps!

7 0

4 years ago

Why is NCl3 not soluble in water?

stiks02 [169]

Answer:

Explanation:

NCl3 does not dissolve in water because it is a nonpolar molecule which is different with water. NCl3 is nonpolar due to the difference in electronegativities between 3 atoms of Cl and 1 atom if N2.

3 0

3 years ago

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