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dusya [7]
4 years ago
14

Explain what needs to be done to the circuit so that the bell will make a sound

Chemistry
1 answer:
blondinia [14]4 years ago
4 0

Answer:a switch

Explanation:because the electricity will go to the battery to the bell and it will make a sound

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nlexa [21]

7 is the pancreas and 8 is i can’t see the other choices but for diabetes the glucose levels will be a lot higher

3 0
4 years ago
Read 2 more answers
Which is a strong base?<br><br> A. HCl<br> B. NaOH<br> C. NH3<br> D. H3CO3
ra1l [238]

Answer:

c

Explanation:

4 0
3 years ago
Calculate the ph of a solution formed by mixing 200.0 ml of 0.30 m hclo with 300.0 ml of 0.20 m kclo. the ka for hclo is 2.9 × 1
velikii [3]
C(HClO) = 0,3 M.
<span>V(HClO) = 200 mL = 0,2 L.
n(HClO) = </span>c(HClO) · V(HClO).
n(HClO) = 0,06 mol.<span>
c(KClO</span>) = 0,2 M.
<span>V(KClO) = 0,3 L.
n(KClO) = 0,06 mol.
V(buffer solution) = 0,2 L + 0,3 L = 0,5 L.
ck</span>(HClO) = 0,06 mol ÷ 0,5 L = 0,12 M.
cs(KClO) = 0,06 mol ÷ 0,5 L = 0,12 M.<span>
Ka(HClO</span>) = 2,9·10⁻⁸.<span>
This is buffer solution, so use Henderson–Hasselbalch equation: 
pH = pKa + log(cs</span> ÷ ck).<span>
pH = -log(</span>2,9·10⁻⁸) + log(0,12 M ÷ 0,12 M).<span>
pH = 7,54 + 0.
pH = 7,54</span>
6 0
4 years ago
NO FILES
MrMuchimi

Answer:

the general equation is: A + X → AX. Where a single compound on the reactant side breaks down into two or more products during a chemical change. The general equation is AX → A + X.

Explanation:

6 0
3 years ago
Which of the following changes will always be true for a system with increasing entropy?
iren2701 [21]

Answer:- The answer is +\Delta S .

Explanations:- Negative value of delta G indicates a spontaneous reaction. From Gibb's free energy equation:

\Delta G=\Delta H-T*\Delta S

From this equation, delta G is more negative if delta H is negative and delta S is positive.

If the entropy is increasing then it means delta S is positive but just by looking at the delta S, we can't say if delta G is negative as delta H and temperature also plays an important role.

So, the only right option is + delta S.

7 0
3 years ago
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