A substance undergoes change. Which Of the following indicates that the change was a chemical change?

a. the substance changed state.

b. the molecules of the substance changed

c. the substance changed shape.

d. the density of the substance changed.

How can one figure out whether the electrons are being shared equally or unequally?

Why would it have been wrong to write Li2SO4 as lithium sulfur oxide?

Which statements describe kinetic and potential energy? Check all that apply. Energy can be stored in the position of an object. Energy is not present in a moving object. Energy can be stored in the position of the particles that make up a substance.

How many amu are there in 8.3g?

If an element has two isotopes, what is the atomic mass if one of the isotopes has a mass of 15.000 amu and makes up 5.000% of the mass of the element while the other isotope has a mass of 16.000 amu and make up the remaining 95.000 %?

How to find the better buy of two of the same item, but they have different units of measurements and different costs.?

The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds

What is the name of the compound composed of iron and carbonate? [hint: iron has a + 3 charge in this compound]?

In a chemical equation the products appear on which side of the equation? A. Left B. Top C. Right D. Bottom

What does the shape of a protein molecule resemble?