5. Which of the following statements is not true?

The nucleus of an atom has a positive charge.

Atoms of the same element can have different masses.

Atoms of isotopes of an element have different numbers of protons.

Atoms are mostly empty space.

How to write mole ratio of 4p + 5o2 = 2p2o5

Which substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes? a) CH4 b) H2S c) CO2 d) NaCl

A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and sanitizing the brewing tanks. 73.0% of the heat produced by the boiler is used to create saturated steam at 12.

Which wave can be transmitted through empty space

How many atoms of Hydrogen in the reactants of the following equation? 3Ba (OH) 2 + 2Na3PO4 - -> Ba3 (PO4) 2 + 6NaOH 6 5 4 3 Remember that the coefficient at the front of the compound must be multiplied by any subscript.

Geologists may choose to lick a mineral to identify it. What mineral is the geologist expecting with this test?

Al-Qaeda is the name of the group that fought against the Soviet-supported government in Afghanistan. a. True b. False

How are magic minerals different from Felsic minerals? A. Mafic minerals contains lower levels of iron and magnesium. B. Mafic minerals contain more dark-colored, high-density minerals C.

If 3.491 grams of the precipitate was formed, how many moles of strontium bromide were reacted

The rate constant for the decomposition of acetaldehyde, CH₃CHO, to methane, CH₄, and carbon monoxide, CO, in the gas phase is 1.32 ✕ 10⁻² L/mol/s at 707 K and 3.20 L/mol/s at 851 K. Determine the activation energy (in kJ/mol) for this decomposition.