All categories

2 years ago

Will mark Brainliest!!! PLEASE HELP

Chemistry

1 answer:

GalinKa [24]2 years ago

8 0

1= D
2= B
3= E
4= F
5= A

You might be interested in

Need help!!! Also don't joke around please

uysha [10]

47.867 u jdjsjsnsnnajjaisjsb

3 0

3 years ago

To make use of an ionic hydrate for storing solar energy, you place 422.0 kg of sodium sulfate decahydrate on your house roof. A

Law Incorporation [45]

Complete Question

To make use of an ionic hydrate for storing solar energy, you place 422.0 kg of sodium sulfate decahydrate on your house roof. Assuming complete reaction and 100% efficiency of heat transfer, how much heat (in kJ) is released to your house at night? Note that sodium sulfate decahydrate will transfer 354 kJ/mol.

Answer:

The amount of energy released is $x = 4.63650 *10^5 KJ$

Explanation:

Number of moles is mathematically represented as

$n =\frac{mass}{Molar\ Mass}$

substituting $422.0kg = 422 *10^3g$ for mass of sodium sulfate decahydrate( $Na_2 SO_4 \cdot 10H_2 O$ ), $322.2g/mol$ (This value is a constant )for the molar mass of sodium sulfate decahydrate

$n= \frac{422*10^3}{322.2}$

$= 1309.7 \ moles$

From the question we are told that

1 mole of sodium sulfate decahydrate generates $354KJ$ of energy

So 1309.7 mole would generate x

Now stating the relation mathematically

1 mol → 354KJ

1309.7 mol → x

=> $x = 4.63650 *10^5 KJ$

5 0

2 years ago

Nuclear power doesn't directly emit greenhouse gases, but it does leave behind dangerous nuclear _______.

Aleksandr-060686 [28]

Answer:

Waste.

Explanation:

"A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years. Radioactive wastes are subject to special regulations that govern their handling, transportation, storage, and disposal to protect human health and the environment. The U.S. Nuclear Regulatory Commission (NRC) regulates the operation of nuclear power plants."

4 0

3 years ago

Where are you located Somalia

UNO [17]

Answer:

Africa

Explanation:

3 0

2 years ago

Read 2 more answers

A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. Which is the symbol of t

Musya8 [376]

I believe this nuclide is potassium with the symbol K. Atomic number for an element remains constant no matter how the mass changes. From the periodic table, potassium has an atomic number of 19.

5 0

3 years ago

Read 2 more answers