Login
Premium
Home Question Bank Chemistry Archive 2024 December 11

Chemistry Questions from Dec 11,2024

Browse the Chemistry Q&A Archive for Dec 11,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

error msg
21) The half life of radium is 1690 years. If 80 grams are present now, how much will be present in 950 years? 4: Calculate the solubility of zinc hydroxide, \( \mathrm{Zn}(\mathrm{OH})_{2} \), in \( 1.00 \mathrm{M} \mathrm{NaOH} . \mathrm{K}_{\mathrm{sp}}=3.0 \times 10^{-16} \mathrm{for} \mathrm{Zn}(\mathrm{OH})_{2}, \mathrm{Kf}_{\mathrm{f}} \) \( =3.0 \times 10^{15} \) for \( \mathrm{Zn}(\mathrm{OH})_{4}^{2-} \) 60 M -. 0.52 M C. 0.37 M D. 0.32 M E. 0.24 M Ans: E c. Quelle quantité d'énergie faut-il retirer à 343 g d'eau pour diminuer sa température de \( 1^{\circ} \mathrm{C} \) ? d. Représente graphiquement l'énergie reçue par les 222 g d'eau et l'énergie cédée par les 343 g d'eau en fonction de la température Quelle quantité d'énergie faut-il apporter à 222 g d'eau pour élever sa température de \( 1^{\circ} \mathrm{C} \) ? Représente graphiquement l'énergie reçue par les 222 g d'eau et l'énergie cédée par les 343 g d'eau en fonction de la température. Quelle est la température d'équilibre? Quelle quantité d'énergie ont-ils échangé? Calcolare la concentrazione \( \% \mathrm{~m} / \mathrm{m} \) di unA soluzione ottenuta sciogliendo 13.5 g di solito in tanta acqua da ottenere 400 g di soluzione. Se la densità della soluzione è di \( 1.08 \mathrm{~g} / \mathrm{ml} \), calcolare il volume di soluzione e la concentrazione \( \% \mathrm{~m} / \mathrm{v} \) Studiare pag 27 , 28 e 33 Calcolare la densità della seconda frazione ottenuta in laboratorio (t \( =95^{\circ} \mathrm{C} \) ), sapendo che la massa del cilindro vuoto era \( 7,60 \mathrm{~g} \), quella con il liquido è \( 12,42 \mathrm{~g} \), il volume del liquido \( 5,4 \mathrm{ml} \). In classe finiremo l'elaborazione \( ^{2} \) Suppose a radioactive substance decays at a rate of \( 3.5 \% \) per hour Describe the relationship that exists using key words/phrases. Write an equation to model the sinuation. How much of the substance is left after 6 hours? 2. ¿Cuál de las siguientes moléculas presenta un carbono terciario? A) \( 2,2,4,4 \) - tetrametil pentano B) Undecano C) 3,3 - dimetil hexano D) \( 2,2,3 \) - trimetil pentano On completion of the reaction it is found that \( 460 \mathrm{~cm}^{3} \) of HCl gas has formed. \( \begin{array}{l}\text { 6.2.3 Calculate the percentage purity of the sodium chloride. Use } \\ 24,45 \mathrm{dm}^{3} \text { as the molar gas volume }\left(\mathrm{V}_{\mathrm{m}}\right) \text { at room temperature. }\end{array} \) [24] Дана схема превращений \( \mathrm{FeS}_{2} \rightarrow \mathrm{X} \rightarrow \mathrm{H}_{2} \mathrm{SO}_{3} \rightarrow \mathrm{CaSO}_{3} \mathrm{H} \)
Prev 1 2 3 4 5 6 7 Next
1 2 3 4 5 6 7
Prev Next
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy