Is the following molecule polar? BrF_(5) no yes

What effect does hydrochloric acid have on minerals? Breaks down minerals Activates minerals Transports minerals Aids in absorption of minerals

Which one of the sets of reagents would make a good buffer? A & mathrm(HCl) / mathrm(Cl)^- B & mathrm(HI) / mathrm(I)^- C & mathrm(Sr)(mathrm(OH))_(2) / mathrm(OH)^-

A solution has a pOH of 7.50 at 25^circ C . What is the pH?

Question 24 (4 points) Which of the following is a mechanism of polymerization? Addition Subtraction Multiplication Division

Balance the following chemical equation (if necessary): C_(6)H_(6)(l)+O_(2)(g)arrow H_(2)O(g)+CO_(2)(g)

This week's challenge: look around your house for a solution that has its percent concentration listed on the container. For household cleaners and food, the concentration is typically listed on the bottom of the front label. For medicinal and cosmetic solutions the concentration is typically listed on the back label. Assume this is percent concentration by volume (% m/v) Post the name of the solution and its concentration. Do not use something someone else already posted. You know the percent by volume, which means you now have a conversion factor of grams per 100 mL (g substance/ 100 mL). Look at the label again to see how many mL it contained before you opened it. Include in your post, 1) the solution's name 2) percent concentration from the label 3) volume unopened 4) your estimate for grams in the unopened container

Which molecular formula has the lowest boiling point? C_(3)H_(8) C_(2)H_(6) CH_(4)

The pH of a 1.5M solution of pentanoic acid (HC_(5)H_(9)O_(2)) is measured to be 2.33. Calculate the acid dissociation constant K_(a) of pentanoic acid . Round your answer to 2 significant digits. K_(a)=square

The purpose of a buffer system is to: A maintain a norma growth rate B prevent drastic changes in pH C ensure proper digestion D speed up nerve impulses

Hot Questions

Question 4(Multiple Choice Worth 4 points) (01.06 MC) Water is a pure substance. Which of the following is true about water? A chemical change is required to separate the elements present in it. A physical change is required to separate the elements present in it. It is made up of two compounds, each with a different set of atoms. It is made up of an element and a compound.

Magnesium reacts with oxygen gas to produce magnesium oxide, light and heat. This reaction is a combination reaction. a catalysis reaction. a decomposition reaction. a double replacement reaction. a single replacement reaction.

One mol of particles of any substance contains how many particles? $6.022\times 10^{-23}$ $6.022\times 10^{23}$ $3\times 10^{-10}$ $10^{6}$ $3\times 10^{10}$

Which is the correct electron configuration for aluminum? A $1s^{2}2s^{2}2p^{6}3s^{3}$ B $1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$ C $1s^{2}2s^{2}2p^{1}$ D $1s^{2}2s^{2}3s^{2}3p^{1}$

Elements in Group 2 are classified as alkali metals. A True B False

Aluminum-27 combines with a neutron to produce a proton and a nuclide. Identify the balanced nuclear equation for this scenario. ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{12}^{25}Mg$ ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{14}^{29}Si$ ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{12}^{27}Mg$ ${}_{13}^{27}Al+_{1}^{1}p\rightarrow _{0}^{1}n+_{14}^{27}Si$

11. Given the word equation: $sodium\quad chlorate\rightarrow sodium\quad chloride\quad +\quad oxygen$ Which type of chemical reaction is represented by this equation? A) double replacement B) single replacement c decomposition D) synthesis

Equations Write a chemical equation for each of the following combinations of known solutions. Balance each equation. Use the symbol (s) after each insoluble compound and (aq) after each soluble one. $HCl(aq)+Pb(NO_{3})_{2}(aq)\rightarrow $ $NaOH(aq)+Co(NO_{3})_{2}(aq)\rightarrow $ $K_{2}SO_{4}(aq)+BaCl_{2}(aq)\rightarrow $ $Pb(NO_{3})_{2}(aq)+BaCl_{2}(aq)\rightarrow $

Use values of $\Delta G_{f}^{\circ }$ from the appendix of your textbook to determine $\Delta G_{r\times n}^{\circ }$ for the following balanced chemical equation. $2NH_{3}(g)+2H_{2}O(g)\rightarrow 2NO(g)+5H_{2}(g)$ $\Delta G_{rxn}^{\circ }=\square kJ$

Which of the following is an example of a physical change? grinding coffee beans baking cake converting water to hydrogen and oxygen digesting a cheeseburger