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Which is an indicator of a chemical reaction?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
A medicine is a sleeping pill but if pregnant women take it, her fetus is a great risk to birth defects. Which statement is most accurate?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
Triclosan and bleach kill bacteria. Why is only Triclosan in hand soap?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
Na is a highly reactive metal, Cl is a poisonous gas, table salt is made of both. Why is table salt safe to eat?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
Insecticides kill insects and may affect human health. Why are they most likely still used?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
Why is copper most likely used more often than gold in electrical wiring?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
A student pours hydrochloric acid into the flask and puts the zinc in a balloon, puts the balloon on the flask and lets the zinc fall into the flask. Bubbles form, the balloon expands and the flask heats up. Which of the following statements is true?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
Which is the best describes the result of a chemical reaction?
They are easily removed from food
Copper is a better conductor
When elements form compounds, their chemical properties change
The mass of the reactants is equal to the mass of the products
Fetuses have a low threshold level for this medicine
Change in temperature
This is a chemical change because the zinc and hydrochloric acid made gas.
Triclosan is a less harsh chemical
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