What is the correct coefficients to balance the equation

SiO2 + HF - SiF4 + H2O

2 3 4 5

Why is a fan considerd mechanical energy

Which of the following mixtures may be act as a buffer solution? A) HBr, NaBr B) HF, NaF C) HCl, NaCl D) HI, NaI

Which of the following is true about homogeneous mixtures? A. They are known as solutions B. They consist of two or more phases C. They have compositions that never vary D. They are always liquids

Oxygen is broken down when it comes into contact with A the sun B carbon dioxide C water

Be sure to answer all parts. Determine how many grams of each of the following solutes would be needed to make 4.30 * 102 mL of a 0.100 M solution.

A flask contains 0.83molof neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the volume of the neon gas?

Why would it be unwise to take a hot air balloon ride in the upper atmosphere? (The chapter is about Pressure)

Unit conversions. (a) Convert 10,000 dynes to units of lbm ∙ ft/s^2 and lbf (b) Convert 0.2 atm to units of Kpa and lbf/in^2 (c) Convert 37 °C (physiological temperature) to units of °F and K. (d) Convert 50 in 2 ∙ lbm/s^2 units of joules and cal.

How much CO2 is produced from 10g of CH4?

Balance the following redox reaction in acidic solution. Zn (s) + MnO-4 (aq) → Zn+2 (aq) + Mn+2 (aq)