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stellarik [79]
3 years ago
8

Pls help me! in the equation below, identify the base.

Chemistry
1 answer:
arlik [135]3 years ago
5 0

Answer:

NH3 (ammonia ) is a base

Explanation:

Hope it helps you

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The constant variable is the math problems, the dependent variable is the calculators, and the independent variables are the students
4 0
3 years ago
a sample of cobalt (specific heat of Co=0.418J/G C )at 100.0 C is dropped into a calorimeter containing 500.0 mL of water at 21.
Alex17521 [72]

Answer:

m_{Co}=6998g=7.0kg

Explanation:

Hello there!

In this case, according to this equilibrium temperature problem, we can set up the following equation to relate the mass, specific heat and temperature change:

Q_{Co}=-Q_{w}\\\\m_{Co}C_{Co}(T_f-T_{Co})=-m_{w}C_{w}(T_f-T_{w})

Thus, we solve for the mass of cobalt as shown below:

m_{Co}=\frac{-m_{w}C_{w}(T_f-T_{w})}{C_{Co}(T_f-T_{Co})} \\\\m_{Co}=\frac{-500.00g*4.184J/g\°C(67.1\°C-21.1\°C)}{0.418J/g\°C(67.1\°C-100\°C)} \\\\m_{Co}=6998g=7.0kg

Best regards!

7 0
3 years ago
6. Which of the following labels for the picture below is correct? a) Solute + solvent = solution b) Solvent + solute = saturati
SVETLANKA909090 [29]

Answer:

answer is a since solute dissolve a solvent to give a solution

4 0
3 years ago
Calculate ∆U (the change in internal energy) for a system on which 850.00
Illusion [34]

Answer:

The heat gain by the system,

q

=

−

250

kJ

.

The work done on the system ,

w

=

−

500

kJ

.

The First Law of Thermodynamics state that

Δ

U

=

q

+

w

=

−

750

kJ

Explanation:

6 0
3 years ago
Fill in the missing reactant and then balance each equation. k(s) + _____ → koh(aq) + h2(g) k (s) + 3h2o →2koh (aq) + 2h2 (g) bi
Marta_Voda [28]
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<span>
2) 2B</span>i(NO₃)₃(aq) + 3H₂S(g)→ Bi₂S₃(s) + 6HNO₃<span>(aq)
</span>This is a double displacement reaction where the ions are exchanged and form new compounds. Since ions are exchanged between 2 compounds its called double displacement.

3) 2HNO₃<span>(aq) + Ba(OH)</span>₂<span> → Ba(NO</span>₃<span>)</span>₂<span>(aq) + 2H</span>₂O<span>(l)
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3 0
3 years ago
Read 2 more answers
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