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strojnjashka [21]
3 years ago
14

Why is magma so hot?

Chemistry
1 answer:
Eduardwww [97]3 years ago
6 0

Answer: Friction in the center of the earth makes melts rocks and makes magma

Explanation:

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sweet [91]

Answer:

4 hours a day

Explanation:

240/60=4

3 0
3 years ago
Read 2 more answers
Which or these equations is balanced H2SO4 + 2Al > Al2(SO4)3 + H2 or 2KCl + Pb(NO3)2 > 2KNO3 + PbCl2
Dmitry_Shevchenko [17]

Balancing of chemical equation is essential because of the law of conservation of mass, which states that the mass of a system can not be created or removed.

The second equation is balanced

2KCl_(_a_q_) +Pb(NO_3)_2_(_a_q_) ==> 2KNO_3_(-a_q_) + PbCl_2(_a_q_)

This is because the number of elements of each atom in the product side equal the number of elements of each atom on the reactant side.

The first equation is not balanced

H_2SO_4 _(_a_q) + 2Al_(_s_) ==> Al(SO_4)_3_(_a_q_) + H_2_(_g_)

This is because there is 1 molecule of SO_4^{-2} on reactant side as compared to 3 molecules of SO_4^{-2}

To balance the equation we add a coefficient of 3 on sulphuric acid (H_2SO_4) and a coefficient of 3 on hydrogen (H_2)

3H_2SO_4_(_a_q_) + 2Al_(_s_) ==> Al(SO_4)_3_(_a_q_) + 3H_2_(_g_)

7 0
4 years ago
What is the poH of a<br> 4.8 x 10-10 M H+ solution?
stiks02 [169]

Answer: pOH = 4.68

Explanation:

pOH = 14 - pH

pH = - Log [H+]

= - Log [4.8 x 10^-10]

= -(-9.32)

pH =+9.32

Therefore, pOH= 14 - 9.32

= 4.68

6 0
3 years ago
Which of these choices is a benefit of international trade?
Inessa [10]
Fewer option for consumers
4 0
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Why is refraction so important in eyeglasses.
miss Akunina [59]
It helps our eyes to see better. For example: If you can't read a book because you see that is blurry, you might need glasses to see it much clearer
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