What difference do you notice between light traveling between air and water and air and glass?

Sodium (na) is a highly reactive metal and chlorine is a poisonous gas. Which compound do they form when they chemically combine?

2. 10 kg of food at a moisture content of 320% dry basis is dried to 50% wet basis. Calculate the amount of water removed

How does saliva maintain the pH of the mouth after bacteria produce acid from the carbohydrates we've consumed?

John pushes his brother Danny on a skateboard. John applies a force of 39 N and Danny's acceleration is 0.9 m/s2. What is the combined mass of Danny and his skateboard? A. 43 kg B. 48 kg C. 31 kg D. 35 kg

Given the reaction: 4NH3 + 3O2 → 2N2 + 6H2O. How many moles of N2 are produced when 1.0 mole of NH3 is consumed?

What is the solubility of nitrogen and calcium nitrate in cyclohexane?

Carbon exists in nature as three isotopes. Given the atomic masses and relative abundance of the isotopes, what is the average atomic mass of carbon?

What is the correct value for Avogadro's number? A. 6.022 x 10^23 B. 6.023 x 10^22 C. 6.022 x 10^33 D. 6.022 x 10^2.3 E. none of the above

Fossil fuels are considered useful to humans because they are

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei