Answer:
1.26 g of Cu
Explanation:
Since we have to find the percentage of the given amount so...
Yield in grams = (Initial mass used / 100) x Percentage Yield
Yield in grams = (1.57 / 100) x 80.6 = 1.26 g of Cu
Answer:
Radiation oncologist.
Explanation:
Cancer is one of the most deadly disease and half of the world population died due to cancer every year. Cancer might occur due to the mutation in the genes that control the cell cycle.
The oncologist may be defined as the individual that has specialized in the cancer and its treatment. The different radiation might use to kill the cancerous cell and the radio elements are administered in the drugs used during the chemotherapy.
Thus, the answer is radiation oncologist.
Answer:
178 grams
Explanation:
<em>It is known that 1.0 mole of a compound contains Avogadro's number of molecules (6.022 x 10²³).</em>
<em><u>Using cross multiplication:</u></em>
1.0 mol contains → 6.022 x 10²³ molecules.
??? mol contains → 6.3 x 10²⁴ molecules.
∴ The no. of moles of (6.3 x 10²⁴ molecules) of NH₃ = (1.0 mol)(6.3 x 10²⁴ molecules)/(6.022 x 10²³ molecules) = 10.46 mol.
<em>∴ The no. of grams of NH₃ present = no. of moles x molar mass</em> = (10.46 mol)(17.0 g/mol) = <em>177.8 g ≅ 178 g.</em>
Answer:
5.00 × 10⁻⁴ mol HCl; 100 mL NaOH
Step-by-step explanation:
3. Moles of HCl
<em>Data:
</em>
V(HCl) = 500 mL
pH = 3
<em>Calculations:
</em>
pH = 3
[H₃O⁺] = 10⁻³ mol·L⁻¹
V = 500 mL × (1 L/1000 mL) = 0.500 L
Moles HCl = volume × concentration
= 0.500 L × (10⁻³ mol/1 L)
= 5.00 × 10⁻⁴ mol
4. Volume of NaOH
NaOH + HCl ⟶ NaCl + H₂O
<em>Data:
</em>
[NaOH] = 0.01 mol·L⁻¹
[HCl] = 0.02 mol·L⁻¹
V(HCl) = 50 mL
<em>Calculations:
</em>
Moles HCl = 0.050 L × (0.02 mol/1 L)
= 1.0 × 10⁻³ mol
Moles NaOH = 1.0 × 10⁻³ mol HCl × (1 mol NaOH/1 mol HCl)
= 1.0 × 10⁻³ mol NaOH
V(NaOH) = 1.0 × 10⁻³ mol NaOH × (1 L NaOH/0.01 mol NaOH)
= 0.1 L NaOH Convert to millilitres
= 100 mL NaOH
The answer is q= -20 hope this helps
