What is the density of a smaple if it weight 3.5 grams and has a volume of 2cm^3

Many people claim that science is "just" based on theories, and that since theories can change, science shouldn't be considered stable. How could you prove that science is stable and valid?

When chlorine gas is passed through a potassium bromide solution, bromine forms in a potassium chloride solution?

A sample of 0.010 mole of oxygen gas is confined at 127 °c and 0.80 atmosphere. what would be the pressure of this sample at 27 °c and the same volume?

My experiment is: How does the amount of salt sprinkled on ice affect the time it takes for the ice to melt? What would be a good hypothesis and what would be the independent and dependent variables?

Some bacteria can reproduce at every 20 minutes. true or false

Sodium (Na) reacts with chlorine gas (Cl2 ) to form sodium chloride (NaCl) as shown in the equation: 2Na + Cl2 → 2NaCl If 4 moles of chlorine gas react, how many moles of sodium will react?

What are transuranium elements properties?

A geologist finds a section of rock that shows was ripple marks. What does it he pr send me or a ripple marks say about the area where the rock formed? A. the rock from rk s in a fast moving stream B.

375centimetercube of a gas has a pressure of 770mmHg. find it's volume if the pressure is reduced to 750mmHg

How did the planets in our solar system form?