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damaskus [11]
3 years ago
10

SOMEONE PLS HELP ME WITH THE FIRST QUESTION IN THE BOTTOM.

Chemistry
2 answers:
Natali5045456 [20]3 years ago
7 0

Answer:

Yes

Explanation:

Water being burnt in a pot of fire results in H20 Gas.

Juliette [100K]3 years ago
6 0

Answer:When you boil water, the heat given off is a sign that chemical bonds are being broken and new ones are being fore broken.

Explanation: false Water boiling is a physical change and not a chemical change, therefore no bonds are broken.

hope this helps

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A balloon filled with helium has a volume of 6.3 L. What is the mass, in grams, of helium in the balloon?
nikklg [1K]

Answer:

The mass of helium in the balloon is 1.125 grams

Explanation:

Step 1: Data given

Volume of helium = 6.3 L

Molar mass of helium = 4.0 g/mol

Step 2: Calculate moles helium

1 mol gas = 22.4 L

6.3 L = 0.28125 moles

Step 3: Calculate mass of helium

Mass = moles helium * molar mass helium

Mass = 0.28125 * 4.0 g/mol

Mass = 1.125 grams

The mass of helium in the balloon is 1.125 grams

7 0
3 years ago
Calculate the ph of the solution resulting from the addition of 85.0 ml of 0.35 m hcl to 30.0 ml of 0.40 m aniline (c6h5nh2). kb
stiv31 [10]

Answer:

pH = 0.81

Explanation:

HCl reacts with aniline, thus:

C₆H₅NH₂ + HCl → C₆H₅NH₃⁺ + Cl⁻

Moles of HCl are:

0.085L × (0.35mol HCl / L) = <em>0.02975mol HCl</em>

Moles of aniline are:

0.030L × (0.40mol HCl / L) = <em>0.012mol aniline</em>

Thus, after reaction, will remain:

0.02975mol - 0.012mol = <em>0.01775mol HCl</em>

Moles of HCl in solution are equal to moles of H⁺, thus, moles of H⁺ are: <em>0.01775mol H⁺</em>

As total volume is 85.0mL + 30.0mL = 115.0mL ≡ <em>0.115L</em>

0.01775mol / 0.115L = 0.1543M

pH of solution = -log[H⁺]

pH = -log 0.1543M

<em>pH = 0.81</em>

<em></em>

3 0
3 years ago
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german

Answer:

Well in one glucose they are 6.022*1023 individual glucose molecule.

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ra1l [238]
They have different neutron number and thus different mass number, but they are the same element.
5 0
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The outermost layer of Earth is called the mantle. Please select the best answer from the choices provided T F
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I think it would be false
7 0
4 years ago
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