Cience, Life Science

Question 1

Which of the following is one of the four main classes of biochemical compounds?

fats

sugars

O DNA

O All of these answers are correct

O carbohydrates

Question 1/5

When water is heated, bubbles form in the water. Is this evidence of a chemical reaction? Why? Question 2 options: No, boiling water is a physical change. Yes, the formation of a gas is evidence of a chemical reaction.

Wave a and b have the same speed, but wave a has a shorter wavelength. which wave has the higher frequency? explain how you know

Compare and contrast, the fission and fusion

Which of the following is type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one?. a. ionic bonding. b. metallic bonding. c. covalent bonding. d. hydrogen bonding

In the tetrachloromethane (carbon tetrachloride) molecule the Cl-C-Cl bond angle is 109.5º. Which distribution of electrons around the central atom provides the best explanation for this bond angle?

Balance the equation _H2O2->_H2O+_O2

A balanced chemical reaction obeys the law of ... A) ideal gases. B) definite proportions. C) conservation of matter. D) conservation of energy.

What is the net ionic equation for the reaction between nickle (II) chloride and silver (I) nitrate?

What is the velocity of a wave with a wavelength of 0.03 m and a frequency of 120 Hz?

What is the gram atomic mass of sodium?