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Novosadov [1.4K]
3 years ago
15

Select all the element(s) from the periodic table shown that will form an ionic compound with a metal M and a nonmetal X and a f

ormula unit of M3X2
Chemistry
1 answer:
Volgvan3 years ago
4 0

Answer:

<h2>Sulfate- SO4^2-</h2><h2>Sulfite- SO3^2-</h2><h2>Permanganate- MnO4</h2><h2>Carbonate- CO3^2</h2>

Explanation:

CARRY ON LEARNING.

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1. How many molecules of S2 gas are in 756.2 L?
AfilCa [17]

Answer: There are 2.032 \times 10^{25} molecules S_{2} gas are in 756.2 L.

Explanation:

It is known that 1 mole of any gas equals 22.4 L at STP. Hence, number of  moles present in 756.2 L are calculated as follows.

Mole = \frac{Volume}{22.4 L}\\= \frac{756.2 L}{22.4 L}\\= 33.76 mol

According to mole concept, 1 mole of every substance contains 6.022 \times 10^{23} molecules.

Therefore, molecules of S present in 33.76 moles are calculated as follows.

1 mol = 6.022 \times 10^{23}\\33.76 mol = 33.76 \times 6.022 \times 10^{23}\\= 2.032 \times 10^{25}

Thus, we can conclude that there are 2.032 \times 10^{25} molecules S_{2} gas are in 756.2 L.

5 0
3 years ago
Help me (number 5).
olga55 [171]

Answer:

a. HF

Explanation:

6 0
3 years ago
What could you change or add to your models based on what you have learned about molecules and phases so far?
timurjin [86]

Answer:Phase changes require either the addition of heat energy (melting, evaporation, and sublimation) or subtraction of heat energy (condensation and freezing). ... Changing the amount of heat energy usually causes a temperature change.

Explanation:

5 0
3 years ago
Read 2 more answers
Mass can be created and destroyed.
Musya8 [376]

Answer:

Conservation of Energy and Mass

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. ... Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

5 0
3 years ago
Before you start an investigation, you see the Hazard symbol for Electrical Hazard. What safety steps should you follow when con
Fantom [35]

Explanation:

Safety hazards means they are are the unsafe working conditions which can cause the workmen injury, illness, or death. Safety hazards are some of the most common risks at the workplace.

Electrical hazards may be defined as a place or a condition which is dangerous and where a person working can come in contact with electrical contact with some energized equipment or any electrical conductor. There is always danger or a chance for the workmen to get injury or get a flash burn while working.

The safety steps are :

1. Follow the instruction properly

2. Take proper safety measures like wearing gloves, shoes, not touching any live wires, etc.

3. Follow the clean up procedure properly.

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3 years ago
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