A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 miles?

OA. 2 minutes

OB. 2 hours

C. 45 minutes

OD. 45 hours

90 minutes

What elements could replace iron in a compound

Which elements has the same chemical and physical properties the one in the same period or the one the same group?

A mixture of calcium carbonate, CaCO3, and barium carbonate, BaCO3, weighing 5.40 g reacts fully with hydrochloric acid, HCl (aq), to generate 1.39 L CO2 (g), mea sured at 50°C and 0.904 atm pressure.

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

Combustion analysis was run on a 0.80391 gram sample of an unknown compound containing only C, H, and O. The results indicate that 2.007 grams of CO2 and 0.9856 grams of H2O were produced. What is the empirical formula of the compound

Candle was gradually loses its shape as it is heated. What type of solid is it? Explain

To determine the moles of ammonium chloride produced, we need to find the limiting reactant. H2O is present in an unlimited amount, so it cannot be the limiting reactant. Let's then determine the amount of each remaining reactant present (in moles).

Which of the following is a precipitation reaction? a. 2 LiI (aq) + Hg2 (NO3) 2 (aq) →Hg2I2 (s) + 2 LiNO3 (aq) b. NaCl (aq) + LiI (aq) → NaI (aq) + LiCl (aq) c. HCl (aq) + KOH (aq) → KCl (aq) + H2O (l) d.

How many outmost electrons do lithium and potassium have

Which of the following is a heterogeneous mixture Air Salt water Steel Soil I think it's soil but I'm not positive