Which of the following statements is true?

A. Metals lose electrons to become cations.

B. Nonmetals gain electrons to become cations.

C. Metals gain electrons to become cations.

D. Nonmetals lose electrons to become cations.

For the reaction 2N2O5 (g) 4NO2 (g) + O2 (g), the following data were colected: t (minutes) [N2O5] (mol/L) 0 1.24x10-2 10 0.92x10-2 20 0.68x10-2 30 0.50x10-2 40 0.37x10-2 50 0.28x10-2 70 0.

A calculator answer of 423.6059 must be rounded off to three significant figures. what answer is reported?

What type of wave is sound? a. gamma b. pressure c. electromagnetic d. light

Which type of radioactive decay can pass through the body? A. alpha emission B. beta emission C. positron emission D. gamma rays

If liquid substance A is pH 4 and substance B is pH 3, then which is more acidic? How do you know? What is neutral pH?

In which of the following situations does water undergo a change in physical properties? a. The bathroom fills with steam when you take a hot shower. b. The neighbor's pond freezes over in winter. c. Water is broken down to yield H2 and O2. d. a.

Which statement best describes the ideas of two scientists who studied properties of light? Newton and Maxwell had similar ideas about light being made of particles.

As transformações estão presente em nosso cotidiano, elas nunca param de acontecer, na sua maioria invisível a olho nu. Quais critérios é preciso observar para identificar se ocorreu transformação?

U human ear is measured in?

Is the earth older than any of the rock layers.