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Mumz [18]
3 years ago
11

Which of these would be caused by a chemical change?

Chemistry
2 answers:
Irina18 [472]3 years ago
4 0
<h2>The Answer to this question is C</h2>
s2008m [1.1K]3 years ago
3 0

Metamorphic rock forming from igneous.

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It's almost time for bed but before you're ready to go to sleep you decide to make yourself a cup of hot chocolate and a tasty s
ehidna [41]

1. Milk.

2. What is in the bowl the popcorn, cereal, and pretzels.

3. Hot chocolate and hot milk.

4. Hot chocolate mix.

5. Hot milk.

6. No, because the hot chocolate powder was meant for hot liquids and with cold water it will take longer to dissolve.

You don't have to write exactly as me change it up if you need to hope this helps!!!

8 0
3 years ago
Which of the following statements is TRUE?
Alexxx [7]

Explanation:

I'll give you a real answer later need points for test questions sorry!!!!!!

8 0
3 years ago
Consider 2 Al + 6 HCl → 2 AlCl3 + 3 H2 , the reaction of Al with HCl to produce hydrogen gas. What is the pressure of H2 if the
Margaret [11]

Answer : The pressure of hydrogen gas is 8.96 atm.

Explanation :

The given balanced chemical reaction is:

2Al+6HCl\rightarrow 2AlCl_3+3H_2

From the balanced chemical reaction we conclude that,

As, 2 moles of Al react to give 3 moles of H_2 gas

So, 4.50 moles of Al react to give \frac{3}{2}\times 4.50=6.75 moles of H_2 gas

Now we have to calculate the moles of H_2 gas when percent yield is 75.4.

\text{The moles of }H_2=75.4\% \times 6.75=\frac{75.4}{100}\times 6.75=5.09moles

Now we have to calculate the pressure of H_2 gas.

Using ideal gas equation :

PV = nRT

where,

P = Pressure of hydrogen gas = ?

V = Volume of the hydrogen gas = 14.0 L

n = number of moles of hydrogen gas = 5.09 moles

R = Gas constant = 0.0821L.atm/mol.K

T = Temperature of hydrogen gas = 300 K

Putting values in above equation, we get:

P\times 14.0L=5.09mol\times 0.0821L.atm/mol.K\times 300K\\\\P=8.96atm

Therefore, the pressure of hydrogen gas is 8.96 atm.

3 0
3 years ago
Name two methods scientists use to obtain empirical evidence
adell [148]
Through hypothesis and experiments
4 0
3 years ago
Which one is more acidic, Chloroacetic acid or Bromoacetic acid? And why?
Mama L [17]

Chloroacetic acid <em>is stronger. </em>

<em>This is because it contains (more electronegative) chlorine atoms in place of (less electronegative) hydrogen atoms.</em>

3 0
3 years ago
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