What is the oxidation state of strontium (Sr) ?

What is another name for the heat involved in a reaction?

CH3OH + O2 → CH2O + H2O balance thiss

2. J. J. Thomson's cathode-ray tube experiment showed which of the following? Electrons are in a cloud surrounding positively charged particles. Atoms consist of at least some negatively charged particles. Matter can be neither created nor destroyed.

1. Rank the following compounds in order of decreasing acid strength using periodic trends. Rank the acids from strongest to weakest. To rank items as equivalent, overlap them. A. HCl. B. H2S. C. HBr. D. BH3.2.

Vaccines are used to prevent disease. They are given to patients as dead or weakened forms of a virus. Which disease would most likely have a vaccine?

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