Which of these is considered a native element?

a. pyrite

b. galena

c. platinum

d. cinnabar

Edith will be handing out school spirit ribbons in class on Monday. She needs 70 ribbons that are each 20 cm long - a total of 1,400 cm of ribbon - but the fabric store only sells ribbons by the meter. How many meters of ribbon does Edith need?

Which group of people was President Jackson addressing? (1) African Americans (2) Asian Americans (3) Mexican Americans (4) Native American Indians

According to the reaction Cl2O7 + H2O → 2HClO4, how many grams of Cl2O7 must react with an excess of H2O to form 56.2 g HClO4?

For the reaction, X + Y → A + B, ΔGo is - 1324 kJ. Which one of the following statements is NOT valid concerning the reaction? a. The reaction is spontaneous as written. b. Three of these statements are valid. c.

If you add acid or base to water how will the ph change

In an open system, the vapor pressure is equal to the outside air pressure. T or F?

Could acetic acid be used in the esterification, instead of acetyl chloride? Why or why not?

9. In a sample of gas, what causes pressure? Answer in a completesentence.

Sodium (Na) reacts with chlorine gas (Cl2 ) to form sodium chloride (NaCl) as shown in the equation: 2Na + Cl2 → 2NaCl If 4 moles of chlorine gas react, how many moles of sodium will react?

What are transuranium elements properties?