When heated, solid copper (ii) carbonate decomposes to solid copper (ii) oxide and carbon dioxide gas. give the balanced chemical equation (including phases) that describes this reaction?

Identify which element is the most metallic - potassium, calcium, scandium, or titanium

When placed in a 100-mL square box, a substance has a spherical shape and has a volume of 50 mL. When placed in a 100-mL circular tube, that same substance has a spherical shape and a 50-mL volume. In what phase or state was the substance?

1. If a maximum of 5.60g of a gas at 2.50 atm of pressure dissolves in 3.5-L of water, what will the solubility be if the pressure changes to 5.00atm?

Which reaction has a positive δs°? question 6 options: a. o2 (g) + 2h2 (g) → 2h2o (l) b. 2n2h4 (g) → 2nh3 (g) + h2 (g) c. 2no (g) → n2o2 (g) d. n2 (g) + 3h2 (g) → 2nh3 (g) ?

Stella has poured 3 cups of water into a 1-L soda bottle. Stella then sealed the bottle and placed it in the sunlight. What natural process can Stella study with the model she built? A. nitrogen cycle B. rock cycle C. carbon cycle D. water cycle

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

3. Which word best fits with the Earth's day and night cycle a. Revolution b. Rotation C Orbit d. Axis