The 121 howitzer refers to the bore size of the weapon in mm. Thus, the "121" has a 121 mm bore size. What is the "caliber" of this gun if the term caliber refers to the bore size in inches multiplied by 100 (10.0 mm = 1.00 cm; 2.54 cm = 1.00 in)? 2. According to the Bronsted-Lowry definition, a base is a(n):

For the analysis of trace metals it is necessary to prepare solutions of very low concentrations from a stock solution of higher concentration using a micropipette and a volumetric flask. What volume of a 0.0015 M solution of MgCl2(aq) would be required to prepare a 73 nM solution of Mg2* in a 150 mL flask? O 1.5 HL O 7.3 HL O 15 HL O 0.53 HL

1 A solution of 2.50 M formic acid is 0.915% ionized. What is the pH of this solution? Enter your answer, rounded to the correct number of significant figures, in the box. pH = X 2.54 A solution of HA, a weak acid (pKa = 8.112), has a pH = 5.770. [HA]eq = 3.12 x 10-4 M. What was the initial concentration of the weak acid solution? Enter your answer, rounded to the correct number of significant figures, into the box below. If your answer is a decimal, put a O before the decimal point. Do not use scientific notation. pH = 1 [weak acid] initially = X X 4.00 0.00404 An aqueous solution of 0.045 M HA (pKa = 11.11) is prepared. What is the pH of this solution? Enter your answer, rounded to the correct number of significant figures, in box below. If your answer is a decimal, put a 0 before the decimal point. Do not use scientific notation. M 1050301 the

What would be the correct products to complete the total ionic equation given below: Zn2+ (aq) + 2CIO (aq) + 2H* (aq) + S²- (aq) --> ? The following notation is used in the answers given: Chemical Answer symbol notation Zn2+ Zn^2+ CIO CIO^- H* H^+ S2- S^2- ZnS (s) + 2CIO^- (aq) + 2H^+ (aq) Zn^2+ (aq) + 2HCIO (s) + S^2- (aq) Zn^2+ (aq) + 2CIO^- (aq) + 2H^+ (aq) + S^2- (aq) Zn(CIO)2 (aq) + H2S (aq)

Antacids neutralize the hydrochloric acid in your stomach. What is the correct neutralization reaction of stomach acid with Milk of Magnesia  (Mg(OH)2)(Mg(OH)X2) ?   Select one:     HCl+Mg(OH)2⟶H2O+MgCl2HCl+Mg(OH)X2⟶HX2O+MgClX2     2HCl+Mg(OH)2⟶2H2+O2+MgCl22HCl+Mg(OH)X2⟶2HX2+OX2+MgClX2     HCl+Mg(OH)2⟶HMg+ClOHHCl+Mg(OH)X2⟶HMg+ClOH     2HCl+Mg(OH)2⟶2H2O+MgCl22HCl+Mg(OH)X2⟶2HX2O+MgClX2     HCl+Mg(OH)2⟶HMg+2Cl(OH)2

ou are asked to weigh 2 g of lithium and add it to 1500 ml of distilled water +2drops of indicator, knowing that the density of water is 1 at room temperaturewhile conducting this experiment. What type of reaction occurs? Write and balance the equation of this reaction. Is there a gas that will be emitted? How can you test that this gas was released

Consider the chemical equation below: Fe(NO3)2 (aq) + Na2CO3 (aq) → FeCO3 (s) + 2NaNO3 (aq) Identify the spectator ion(s) in this reaction.  Group of answer choices   NO3- and Na+ Na+ Fe2+ and CO32- Fe2+ NO3-

Express your answer using two significant figures. HA, a weak acid, with Ka = 1.0 × 10-8, also forms the ion HA,. The reaction is НА (ад) + А (ад) —D НА, (ад) and its K %-D 4.0. - 4 [H*] = 1.0 • 10 M Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B Calculate the A in a 1.0 M solution of HA. Express your answer using two significant figures. n ΑΣφ- ? [A¯] = M Submit Request Answer Part C Calculate the HA,] in a 1.0 M solution of HA. Express your answer using two significant figures. 圈] ? [HA,] = M Submit Request Answer

F2 (g) + Ga(s) → Ga (aq) + F (aq) a. F2 (g) + Ga(s) Ga+ (ag) + F(aq) b. O2 (9) + H2O(1) +Pb(s) → Pb(OH)2 (s) O2(g) + H2O(1) + Pb(s) |Pb(OH)2(s) 3+ H* (aq) + MnO4 (ag) + Fe (ag) → Mn²+ (aq) + Fe* (ag) + H2O(1) с. H (aq) + MnO4 (aq) + Fe?+ (aq) Mn2+ (aq) + Fe+ (aq) + H2O(1)

Correct answers are given in second picture!!! Please show me how to get them and explain!