Category: Chemistry

Comparing Plant Cells to animal cells, which statement is most correct?

In a calorimetry lab, sodium oxide is combined with water. Compute the

heat released in the formation of 1.99 grams of sodium hydroxide. Na2O +
H2O -> 2NaOH + 215. 76 kJ

Pick the larger species from each of the following pairs.

a. When comparing the two species Pd and Pd2+ the larger of the two is
b. When comparing the two species Se^2- and Sr^2+ the larger of the two is
c. When comparing the two species Sr and Sr^2+ the larger of the two is
d. When comparing the two species N and N^3- the larger of the two is
1. Sr^2+
2. Se^2-
3. Pd^2+
4. Pd
5. Sr^2+
6. N^3-
7. N^3-
N
Sr

Give two uses of compound under each of the following, in medicine and in industry​

Cr,0,2- + 6 11 + 14 H+ + 2 Cr3+ + 3 12 + 7 H2O

Which of the following statements about the reaction given above is NOT true?
The oxidation number of iodine changes from – 1 to 0
The oxidation number of oxygen remains the same
O The oxidation number of chromium changes from +6 to +3
O The oxidation number of hydrogen changes from +1 to 0

What is the molarity of a NaOH solution if 25.0 mi is required to completely neutralize

40.0 ml of a 1.5 M solution of H2SO4?

A body of mass 0.5kg is thrown vertically upwards

from the ground with an Initial velocity of 80.m/sCalculate” the potential energy at B 80.0cm above the ground​

7. Calculate moles of H2 needed to form 2.25 moles HCl in the reaction H2 + Cl2==>2HCl

What mass of NaCrO2 can be obtained from the reaction of 7.40g Cr(OH)3 with 7.60g NaOH in the following reaction: CrOH3+NaOH==>NaCrO2+2H2O

QUESTIONS A how does the ratio in calculation #4 Compare with stre catio oa etre Cooprecent a the same too aetate the balanced equation per te reaction Fe – Cusau Cu + Fesou​