How many atoms of hydrogen (h) are present in 200 molecules of ammonia (nh3) ? express your answer numerically?

In chemistry, what is a precipitate? I'm doing an assignment where the question is: So ... say the two chemicals were Lead nitrate + Sodium and they produced a 'white precipitate'

How many electrons can copper lend?

What are some cool science fair expirements?

A confused student was doing an isomer problem and listed the following six names as different structural isomers of C7H16. a. 1-sec-butylpropane b. 4-methylhexane c. 2-ethylpentane d. 1-ethyl-1-methylbutane e. 3-methylhexane f.

When new compounds are formed, what type of change has taken place? physical phase form chemical

The host for this disease is the mosquito. Question 4 options: malaria HIV cholera small pox

How many milliliters of 1.50 M magnesium sulfate soulution is required to supply 2.50 mole of this salt?

What side does heat go on in an endothermic reaction?

Consider the chemical reaction represented below. CH4 + 2O2 CO2 + 2H2O + Heat Which of the following statements about this reaction is true? A. The reaction releases heat. B. Heat is absorbed by the reaction. C. The reaction releases oxygen. D.

Which phrase is a result of a scientific law? Daryl is a scientist at a research institute. He reviews articles written by other scientists. He conducts experiments after creating a hypothesis.