A gas occupies 100 liters at 30 degrees C under a pressure of 1.28 atm. Approximately what volume would the gas occupy at STP (273 K, 1 atm) ?

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is A. Argon B. Xenon C. Helium D. Krypton The gases used in different types of welding would include A. oxygen and hydrogen B.

Magnesium metal burns in the presence of oxygen gas to produce solid magnesium oxide. You are given 4.00 grams of magnesium and an excess of oxygen gas in a tank. How many grams of magnesium oxide can be produced?

What does it mean if the salt decomposes to yield a volatile material

For the equation 3 H2SO4 + 2 Al - > 3 H2 + Al2 (SO4) 3, suppose you wish to prepare 28.7 grams of H2. How many grams of H2SO4 and of Al would you require so that all of the H2SO4 and Al were combined?

Which of these is an acid

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