A hardware salesman measures the mass of a box containing 1000 washers. The mass is 1.1298kg. What is the mass of a single washer in milligrams? Write your answer as a decimal.

A mixture contains 3.64g nacl, 2.87g nh4cl, and 4.13g of sio2. what is the percent by mass of nh4cl

What is the concentration of hydrogen ions [H+] in a solution of pH = 4.0? 1 * 104M 4 * 10-4M 2 * 10-2M 1 * 10-4M

Earth would not have seasons if?

A radioactive nuclide that is used to label blood platelets has 49 protons and 62 neutrons. Which is the symbol of nuclide

Which would show an example of how physical changes are reversible? A cutting a gold bar in two pieces and then putting the pieces next to each other B burning a match and then relighting it C melting tin and then cooling it into a mold D combining

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