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Sloan [31]
1 year ago
11

True or False?

Chemistry
1 answer:
Greeley [361]1 year ago
4 0

Answer:

True

Explanation:

because hydrogen is the first element and the atomic mass is 1 and after that the atomic number is kept increase

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A gas occupies 100.0 mL at a pressure of 780 mm ahh. What is the volume of the gas when it’s pressure is increased to 880 mm Hg
vlabodo [156]
Hello!

The volume of the gas when its pressure is increased to 880 mm Hg is 88,64 mL

This question can be easily answered using the Boyle's Law, which states that as pressure increases, the volume is lower. It can be expressed in a mathematical way as follows:

P_1*V_1=P_2*V_2

So, from this equation we can clear V₂ to find the volume at 880 mm Hg:

V_2= \frac{P_1*V_1}{P_2}= \frac{780 mmHg*100 mL}{880 mmHg}=88,64 mL

Have a nice day!

4 0
4 years ago
Which of the following statements does not describe the structure of an atom?
Hitman42 [59]
Most of the mass of an atom comes from the electron cloud would NOT describe the structure of an atom
7 0
4 years ago
Read 2 more answers
Which answer correctly describes the difference between covalent and ionic bonds?
elena-14-01-66 [18.8K]

Answer:

Ionic: Transfer of electrons

Covalent: sharing of electrons

Explanation:

Ionic bonding is between a metal and a non metal. The metals loses electrons while the non metal gains electrons

Covalent bonding is where two non non metals share electrons.

4 0
3 years ago
A sample of argon has a volume of 0.165L at -34.0°C and a 0.98atm of pressure. What would the volume of this gas at STP be?
JulijaS [17]

Answer: 0.185 L

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.98 atm

P_2 = final pressure of gas = 1 atm  (at STP)

V_1 = initial volume of gas = 0.165 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = -34.0^oC=273-34.0=239.0K

T_2 = final temperature of gas = 273K  (at STP)

Now put all the given values in the above equation, we get:

\frac{0.98\times 0.165}{239}=\frac{1\times V_2}{273}

V_2=0.185l

Thus the volume of this gas at STP be 0.185 L

8 0
3 years ago
What is the number of neutrons in the element Nickel?
Lelu [443]

Answer:

Number of Protons, 28. Number of Neutrons, 31. Number of Electrons, 28

Explanation:

N/A

5 0
3 years ago
Read 2 more answers
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