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aivan3 [116]
3 years ago
10

What type of reaction is Ni + MgSo4

Chemistry
1 answer:
kumpel [21]3 years ago
4 0
Chemical- it produces ammonia.
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Calculate the amount of energy when water at 72 degrees c freezes completely at 0 degrees c
gtnhenbr [62]

<u>Answer:</u>

<em>The amount of energy needed when water at 72 degrees c freezes completely at 0 degrees c is 6.37\times10^4 Joules</em>

<em></em>

<u>Explanation:</u>

Q = m \times c \times \Delta T

where

\Delta T = Final T - Initial T

$Q_{1}=100 g \times 4.184 \frac{J}{g^{\circ} \mathrm{C}} \times\left(72^{\circ} \mathrm{C}-0^{\circ} \mathrm{C}\right)$

Q_1 =30125J

Q is the heat energy in Joules  

c is the specific heat capacity (for water 1.0  cal/(g℃))  or 4.184  J/(g℃)

m is the mass of water

mass of water is assumed as 100 g (since not mentioned)

Q_2  is the heat energy required for the phase change

Q_2 =mass × heat of fusion

\\$Q_{2}=100 g \times 336 \frac{J}{g}$\\\\$Q_{2}=33600 J$

Total heat = Q_1 + Q_2

Total Heat = 30123J + 33600J

= 63725 J

= 6.37\times10^4 Joules is the answer

3 0
3 years ago
Which of the following can be used to neutralize an ammonia (NH3) solution?
tensa zangetsu [6.8K]
It really depends on your options. 
Since NH3 solution is a weak base, the option that neutralizes a base is an acid. So find an acid among your options, and here are some examples: HNO3, HCl, etc.
5 0
3 years ago
Read 2 more answers
Lead (II) Acetate + Potassium Chromate
castortr0y [4]

Answer:

SOMEONE HURRY AND ANSWER THIS

Explanation:

8 0
3 years ago
Question 5 why does grinding solid crystals increase the rate of dissolving for a solid solute in water? smaller crystals are mo
My name is Ann [436]
Grinding solid crystals increase the rate of dissolving for a solid solute in water because smaller crystals have more surface area. The solubility of a substance depends on the physical and chemical properties of the solute and solvent as well as the temperature, pressure and the pH of the solution. For example increase in temperature increases the rate at which a solute dissolves in a solvent.
5 0
3 years ago
What is the volume of a 5.30g piece of aluminum? The density for aluminum is 2.70gmL.
Blizzard [7]

The volume of the piece of aluminum is 1.96 mL

Explanation:

Density is the relationship of the mass of a substance and its volume.

In this case, the mass of aluminum is 5.30 g and the density is 2.70 g/mL

The formula to apply is;

D=M/V where D is density in g/mL, M is mass in g and V is volume in mL

2.70=5.30/V

V=5.30/2.70 =1.96 mL

Learn More

Density of a substance:brainly.com/question/12605423

Keywords: volume, aluminum,density

#LearnwithBrainly

4 0
3 years ago
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