The temperature of a sample of water increases from 30.0 degrees C to 40.0 degrees C as 6540 joules of heat are added. What is the mass of the sample of water?

The number of electrons can accommodate in K shell is 8. True or False

What imformation is contained in a chemical formula

If one mole of Uranium has a mass of 238.029 g, 0.0550 moles of U has a mass of (blank) grams.

There are many different types of maps a map that shows the types of rocks or the age of rocks in an area is called a Topographic map, geologic map, street map, contour map?

Pb (OH) 2 + _HCI → __ H2O + _ PbCl2

Which of the following statements is not true? Question 4 options: When atoms have similar electronegativities, electrons are shared equally When electrons are shared equally, the molecule is called a nonpolar molecule.

Write the isotope symbol for two isotopes of the same element. What makes the isotopes different? How are they similar?

According to the periodic table, which element has an atomic number of 40? a. u b. ca c. zr d. np

3. Which word best fits with the Earth's day and night cycle a. Revolution b. Rotation C Orbit d. Axis

What causes temperatures in the summer to be higher than temperatures in the winter? A. The greenhouse effect, which raises temperatures on Earth, takes place during the summer months only. B.