A reaction between zinc and hydroelectric acid can be slowed down by

A. Cooling the acid

B. Using large lumps of zinc instead of zinc powder

C. Using dilute acid rather than concentrated acid

D. All of the above

How does sand cause weathering?

How do two negatively charged particles bahave when held close together and then released

What is the trend in metallic character going left to right?

What is a family of elements

A solution with a ph of 5 has how many more protons in it than a solution with a ph of 7?

The relationship between number of particles and pressure is As number of particles increases, pressure increases As number of particles increases, pressure decreases The two are not related

Consider the reaction: Al2S3 + 6 HCl → 2 AlCl3 + 3 H2S The reaction has a 29.1% yield. How many grams of Al2S3 are needed to react with 30.0 moles of HCl? a) The molar mass of Al2S3 is 150.16 grams/mole. b) The molar mass of HCl is 36.46 grams/mole.

Why is Earth's temperature just right for life? A. Earth's core is hot enough to heat Earth's surface. B. Earth's magnetic field creates suitable temperatures on Earth's surface. C. Earth's crust is warmed by heat from the sun. D.

Which of the following is an example of a chernical change? Boiling water Burning paper Dissolving sugar in water Melting gold

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules are magnetic.