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a_sh-v [17]
3 years ago
9

HelpPPPPP pleaseeeeEEEEE

Chemistry
1 answer:
velikii [3]3 years ago
8 0

Answer:

A

Explanation:

Fusion combines light elements.

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What is the mass of 13 gold atoms?
Ludmilka [50]

Answer:

uuuh 4.25191 × 10-21 grams????

Explanation:

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Calculate the number of moles of BaF2 in a 10.0 g sample of BaF2.
UkoKoshka [18]

Answer:

The number of moles = 0.06 moles

Explanation:

i) Formula

Number of moles = Mass of the sample ÷ Molar masses of the substances

ii) Number of moles = 10.0 ÷ (137)+(19×2)

= 10.0 ÷ 175

= 0.06 moles

5 0
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What are the 3 Newton laws
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Answer:

The laws are: (1) Every object moves in a straight line unless acted upon by a force.

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(3) For every action, there is an equal and opposite reaction.

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What two methods are used for determining the age of rocks and fossils?
Alexandra [31]

Explanation:

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7 0
3 years ago
2. A sample of oxygen gas is placed in a rigid 1.5L glass container at STP. If the gas is
sladkih [1.3K]

The new pressure : P₂ = 1038.39 mmHg

<h3>Further explanation</h3>

Given

1.5 L container at STP

Heated to 100 °C

Required

The new pressure

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

So P₁ =  1 atm = 760 mmHg

T₁ = 273 K

T₂ = 100 °C+273 = 373 K

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

Input the value :

P₂=(P₁.T₂)/T₁

P₂=(760 x 373)/273

P₂ = 1038.39 mmHg

7 0
3 years ago
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