A substance has a volume of 20mL and a density of 2.5 g/mL. what is it's mass?

0.125 g

8 g

22.5 g

50 g

What's your favorite skincare ingredient/active and why do you prefer it over other ones.

What type (s) of properties of a substance do NOT change with a change in amount or shape? A) physical only B) chemical only C) physical and chemical

An animal refuge park has 120 gazelles. If the population increases by 5% in one year, how manu gazells will the park have next year?

What is the molar mass of CaCl2? 110 g/mol 75.5 g/mol 37 g/mol 54 g/mol What is the molar mass of Ca (OH) 2 100 g/mol 37 g/mol 74 g/mol 57 g/mol What percent of is calcium in Ca (OH) 2? 43.4% 2.7% 70.2% 54.1% Convert 45.5 cm to m? .

How many neutrons are in radon?

if the units cancel and you are left with only the desired units for the problem, all the rations were set up correctly. True or false?

How many valence electrons are in c4h6br2?

Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18% hydrogen (H)

Atoms of different isotopes of the same element differ in their total number of electrons neutrons protons valence electrons

Which type of electromagnetic radiation has the longest wavelength? A) ultraviolet B) infrared C) X-ray D) visible