Which is a factor that affects the size of mineral crystals formed in magma?

a. rate of cooling

b. fluorescence

c. evaporation

d. elements dissolved in hot water

Why is the metric (SI) system called a decimal system of measurement

How many milliliters o a 0.2% solution o a skin test antigen must be used to prepare 4 mL o a solution containing 0.04 mg/mL o the antigen?

Hydrogen fuel cells are a promising alternative to gasoline engines in part because they release water instead of carbon dioxide. In a hydrogen fuel cell, hydrogen gas (H2) and oxygen gas (02) react to make water as shown below.

A 0.100-g sample of your favorite candy is burned in a calorimeter that contains 1.00 kg of water initially at 21.0 ∘C. After the candy is burned, the water temperature is 34.5 ∘C. How many Calories are there per gram of your candy?

Contrast the chemical reactivity of potassium lithium and sodium

Which terms are used to identify pure substances? (1) an element and a mixture (2) an element and a compound (3) a solution and a mixture (4) a solution and a compound

Which of the following polyatomic ions will form an ionic compound with two sodium ions? CO32- HCO31- NO21- NO31-

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.