What substance is helium in helium balloon?

If you combine 410.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

15. During inspiration, A. alveolar pressure exceeds atmospheric pressure. B. transpulmonary pressure increases. C. the diaphragm relaxes. D. intrapulmonary pressure is less than atmospheric pressure

Which is most likely true about electronegativity? a. it tends to be the same across a period b. it tends to be the same down a group c. it tends to increase across a period d. it tends to increase down a group

Significant figure of 75.02

What is the molarity of 48.6 g of magnesium (Mg) ions in 2 L H20?

Which item takes the most amount of water to produce

1. Which of the following two ingredients can combine to make a compound? a. Salt and water b. Hydrogen and oxygen c. Eggs and butter d. Sugar and water 2.

What are two ways climate can influence weathering?

A light has a wavelength of 4.10*10^12m. What is the Frequency?

If a compound has a molar más of 180g/mol and it's empirical formula is CH^2O, what is it's molecular formula?