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Dima020 [189]
3 years ago
13

Select the person responsible for the following: radium

Chemistry
2 answers:
timurjin [86]3 years ago
7 0

The answer is A curlie

xoxo- Muffin


guapka [62]3 years ago
4 0

Answer: Curie

Explanation:

In 1898, Curie discovered the existence of the element radium and polonium during their research on pitchblende she found that there is an element and named it radium.

One year after the discovery of radium, she got Nobel prize for Physics. Radium is a chemical element which lies in the group 2 of the periodic table.

Pure radium appears silvery white, but on reaction with nitrogen in air a black layer forms on it known as radium nitride.

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A weather balloon is filled with helium that occupies a volume of 5.37 104 L at 0.995 atm and 32.0°C. After it is released, it r
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Answer:

The new volume is 63583 L

Explanation:

Step 1: Data given

The initial volume of the balloon = 5.37 * 10^4 L

The initial pressure = 0.995 atm

The initial temperature = 32.0 °C = 305.15 K

The pressure decreased to 0.720 atm

The temperature decreased to -11.7 °C = 261.45 K

Step 2: Calculate the new volume

P1*V1 / T1 = P2*V2/T2

⇒with P1 = the initial pressure = 0.995 atm

⇒with V1 = the initial volume = 5.37 *10^4 L

⇒with T1 = the initial temperature = 305.15 K

⇒with P2 = the decreased pressure = 0.720 atm

⇒with V2 = the new volume = TO BE DETERMINED

⇒with T2 = the decreased temperature : 261.45 K

(0.995 * 5.37*10^4)/305.15 = (0.720 * V2) / 261.45

V2 = 63583 L

The new volume is 63583 L

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3 years ago
When two nitrogen atoms bond together in N2, what type of covalent bond do they form?
Scrat [10]
It would be a triple bond because they overlap orbitals to share three pairs of electrons
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Answer:

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