How can a scientist ensure that his or her data are reliable? by making a single observation by repeating trials during an experiment by recording values without units by keeping the results private

Day 19: You throw a baseball straight up in the air, it moves vertically, stops in midair, then falls back down into your hand. Which of Newton's Laws explains the motion of the ball as it travels through the air and how does this Law explain it?

All atoms of an element always have the same number of question 4 options: electrons protons electrons neutrons save

A reproductive cell that is resistant to harsh conditions and capable of developing into an adult without fusing with another cell. spores antibiotic budding fungus hyphae

The chemical equation below shows the reaction of methane (CH4) and oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O).

What would happen if we run out of fresh water?

1. 1.204 x 1024 atoms He = ? moles He

How many atoms are in 35.1 g of sodium chloride (NaCl) ?

Write the complete balanced equation for the reaction that occurs when C3 H8 combusts in O2.

Which one of the following is not a homogeneous mixture? Question 18 options: vegetable soup carbonated beverages saline solution brewed tea

Choose the substance with the lowest surface tension. Choose the substance with the lowest surface tension. a) H2O b) (CH3) 2CO c) CH3CH2CH2CH3 d) C6H6 e) CH3OH