A 40 g sample of water at an inital temperature of 40°C is heated to 99°C. How much heat did the water absorb? The specific heat of water is 4.18J/gºC

a. 413.82j

b.-9864j

c. 9864.8j

d.-413.82j

Which of the following combinations of reactants will result in a synthesis reaction? A. Li + HCl B. Al + O2 C. Ca + H2O D. F2 + HCl

he density of solid aluminum is 2.70. If a 1g peice of aluminum is dropped in a cup of water, it will sink to the bottomfloat to the tophover in the middle. (The density of water is 1.0

How many moles of CCl4 are there in 34.99 g?

Explain the metallic bonding in terms of the sparsely populated outermost orbitals of metal atoms.

Which of the following is not a correct chemical equation for a double replacement reaction? 2 HNO3 + Mg (OH) 2 yields 2 H2O + Mg (NO3) 2 H3PO4 + 3 NaF yields 3 HF + Na3PO4 2 KNO2 + BaSO4 yields K2SO4 + Ba (NO2) 2 Ca + 2H2O yields Ca (OH) 2 + H2

What are some disadvantages of incinerators?

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

A base can neutralize an acid. true or false