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nlexa [21]
3 years ago
5

Which half-reaction correctly describes an oxidation?

Chemistry
2 answers:
Sergeeva-Olga [200]3 years ago
4 0

Answer: The Answer was D. These people trolling. Look at the attachments I put on

Explanation:

Brums [2.3K]3 years ago
3 0

Answer:

its D

Explanation:

on edge 2020

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When a substance was dissolved in water, the temperature of the water increased. This process is described as
NemiM [27]
The correct answer will be A
3 0
3 years ago
A student carried heated a 25.00 g piece of aluminum to a temperature of 100°C, and placed it in 100.00 g of water, initially at
lawyer [7]

<u>Answer:</u> The final temperature of the system is 14.60°C

<u>Explanation:</u>

When metal is dipped in water, the amount of heat released by metal will be equal to the amount of heat absorbed by water.

Heat_{\text{absorbed}}=Heat_{\text{released}}

The equation used to calculate heat released or absorbed follows:

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]      ......(1)

where,

q = heat absorbed or released

m_1 = mass of aluminium = 25.00 g

m_2 = mass of water = 100 g

T_{final} = final temperature = ?°C

T_1 = initial temperature of aluminium = 100°C

T_2 = initial temperature of water = 10°C

c_1 = specific heat of aluminium = 0.900 J/g°C

c_2 = specific heat of water= 4.18 J/g°C

Putting values in equation 1, we get:

25\times 0.900\times (T_{final}-100)=-[100\times 4.18\times (T_{final}-10)]

T_{final}=14.60^oC

Hence, the final temperature of the system is 14.60°C

3 0
3 years ago
What is the molality of a solution that has 30mg of K3PO4 dissolved in 40mL of water? (The density of water is 1.00 g/mL)
sweet [91]

Answer:

m = 0.0035 m.

Explanation:

Hello there!

In this case, since the formula for the computation of the molality is:

m=\frac{n_{solute}}{m_{solvent}}

We can first compute the moles of solute, K3PO4 by using its molar mass:

n=30mgK_3PO_4*\frac{1gK_3PO_4}{1000gK_3PO_4}*\frac{1molK_3PO_4}{212.27gK_3PO_4}  =1.41x10^{-4}mol

Next, since the volume of water is 40.0 mL and its density is 1.00 g/mL we infer we have the same grams (40.0 g). Thus, we obtain the following molality by making sure we use the mass of water in kilograms (0.04000kg):

m=\frac{1.41x10^{-4}mol}{0.0400kg}\\\\m=0.0035m

In molal units (m=mol/kg).

Best regards!

8 0
3 years ago
Oil platforms may be built in the middle of the ocean. How does an oil platform work?
Korolek [52]

Answer:

A

Explanation:

There is a specific tool called an oil drill that drills into the ground and then a pipe sucks the oil up onto a vessle

8 0
3 years ago
Using the tools and knowledge of science to solve a problem or build new technology is called...
kaheart [24]

Answer:

Invention

Explanation:

Scientific ideas can be applied in novel was to solve new scientific problems and create new technology. This process helps to make life easier and better.

The application of scientific knowledge to solve new problems and create new technology is generally referred to as invention.

5 0
4 years ago
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