Answer:
a.) It matches the universal pH indicator and is indicating the proper pH.
Explanation:
it says its the answer.
Chadwick discovered neutron. Be + alpha particle =
Answer:
470.4N
Explanation:
Given parameters:
Mass of Stephanie = 48kg
Unknown:
Force she exerts while falling to the ground = ?
Solution:
The force she exerts is her weight;
Weight = mass x acceleration due to gravity
Now insert the parameters ands solve ;
Weight = 48 x 9.8 = 470.4N
Answer:
26.20% w/w of KBr in the sample
Explanation:
Mohr titration is a way to quantify Br⁻ and Cl⁻ ions in solution. The reaction is:
KBr(aq) + AgNO₃(aq) → KNO₃(aq) + AgBr(s)
<em>where 1 mole of KBr reacts per mole of AgNO₃</em>
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Thus, moles of AgNO₃ in (25.13mL-0.65mL = 24.48mL) of a 0.04614M solution are:
0.02448L × (0.04614mol / L) = 1.130x10⁻³ moles of AgNO₃ = moles of KBr.
Mass of KBr -Molar mass: 119g/mol- is:
1.130x10⁻³ moles of KBr × (119g / 1mol) = <em>0.1344g of KBr</em>
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Thus, %w/w of KBr in the sample is:
%w/w = 0.1344g / 0.5131g ×100 = <em>26.20% w/w of KBr in the sample</em>
Answer:
compounds, atomic compounds
