Which of the following could result from a substance that undergoes a physical change?

a) Its chemical composition is altered.

b) It has an irreversible change.

c) It forms a new substance.

d) Its shape is altered.

Bacillus megaterium is a mesophile that forms endospores. considering endospores are resistant to high heat, at what temperature will bacillus megaterium survive for experiment 17a if endospores are present?

Number of atoms in sodium chloride

What conclusion can you make about a hypothesis that contradicts an existing theory?

How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?

Write an equation that shows the dehydration of manganese (ii) sulfate pentahydrate.

A 126-gram sample of titanium metal is heated from 20.0°C to 45.4°C while absorbing 1.68 kJ of heat. What is the specific heat of titanium?

What pressure (in atm) will a sample of o2 gas occupy at 100.0 ml, if o2 has a volume of 25.00 ml at 2.0 atm?

What happens when francium and nitrogen are mixed

Which type of chemical reaction occurs in 2KClO3 Right arrow. 2KCl + 3O2

An electrochemical cell is constructed using two half-cells: Al (s) in Al (NO2) 3 (aq) and Cu (s) in Cu (NO3) 2 (aq). The two half cells are connected by a KNO3 salt bridge and two copper wires from the electrodes to a voltmeter.