What effect to calcium ions have on the water in ecosystems?

A. they add to its hardness

B. they increase its acidity

C. they reduce its pH

D. they decrease its salinity

Explain how you would prepare a solution of sucrose with a molarity of 0.25.

What is the theoretical mass of water produced from 10 moles of NaHCO3? NaHCO3 + CO2 + H2O

Tell Whether or not each equation is balanced mark A if you think it is correct mark B if you think it is not balanced 1) 2Fe (OH) 3 → Fe2O3 + 3H20 2) 2Al (OH) 3→ Al2O3 + 3 H2O

How can evidence from an experiment be explained in relationship to the hypothesis? A) as a prediction B) as a question C) as an inference D) as a conclusion

All matter and elements are made of extremely small particles called? don't say gold atoms or neutrons #science

What are genes a part of?

What is the mass (in grams) of 8.45 x 1023 molecules of dextrose: C6H12O6 (Mw. 180.16 g/mol) ?

How do the number and kind of atoms in the reactants compare to the number and kind of atoms in the products

Scientists conduct experiments to collect evidence. Which of the following is the best definition of the word experiment as used by scientists?

The compound HCI is an example of a (n) A. covalent compound B. ionic compound C. element D. salt