1. Which of these items wastes sound energy?

-car radio

-alarm clock

-washing machine

-smartphone

Select the correct answer. The combustion reaction of propane is described by the reaction. C3H8 + 5O2 → 4H2O + 3CO2. How many moles of O2 are required to generate 3 moles of CO2? A. 2.5 moles B. 3 moles C. 4 moles D. 5 moles

Determine whether the following pairs of elements can form ionic compounds. a. oxygen and calcium b. lithium and fluorine c. potassium and calcium d. nickel and chlorine e. fluorine and sodium f. sulfur and bromine

The blank variable response to changes in the manipulated variable

Which tool can be used to measure the volume of a liquid to one decimal place?

What can show the presence of carbon dioxide?

Describe 2 theories for yawning

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?

Where does transcription happen? why is it only in this location?

True or false during decomposition nitrogen gas is changed into nitrogen compounds

Which of the following is a suggested practice to invite families to participate in decision-making and goal-setting for their child? A. Advocacy events B. Take-home backpacks C. Family/teacher conference D. Weekly newsletters