The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of H3O + ions in the solution?

Use: [H3O+]=10-PH

A) 1.05x10^-3 M

B) 4.79x10^-3 M

C) 2.09x10^2 M

D) 9.55x10^2 M

One of the alkali metals reacts with oxygen to form a solid white substance. when this substance is dissolved in water, the solution gives a positive test for hydrogen peroxide, h2o2.

Which of the following elements is most likely to form a + 1 charge? Cl Mg Na Li

2.15 Liters of helium gas at a pressure of 58 kPa and a temperature of 25 degrees celsius, what is the new volume at stp?

Which of Newtons law's is sometimes expressed as "for every action there is equal and opposite reaction"

One disadvantage of vacuum distillation is it is inherently less efficient than fractional distillation at atmospheric pressure. a. True b. False

What is hybridisation

2. Seorang ibu perlu menyediakan satu hidangan kari daging dengan cepat untuk anaknya yang lapar. Langkah manakah yang berikut dapat membantu dia mencapai tujuan ini? (CL01, C2) A. Menggunakan periuk yang lebih besar B. Menambah banyak serbuk kari C.

Which of the following statements is not true? Question 4 options: When atoms have similar electronegativities, electrons are shared equally When electrons are shared equally, the molecule is called a nonpolar molecule.

Write the isotope symbol for two isotopes of the same element. What makes the isotopes different? How are they similar?

According to the periodic table, which element has an atomic number of 40? a. u b. ca c. zr d. np