Steel is attracted to magnet is that a chemical or physical change

Why are bacteria required in the nitrogen cycle? A. Nitrogen needs to be fixed before it is used by plants. O B. The xylem in plants cannot function without bacteria. O C. Plant DNA can only be transmitted by bacteria. 0 D.

The neutron is located in the what part of the atom? A) cloud B) nucleus C) orbital D) quark

What does scientific inquiry refer to

A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of carbon dioxide produced by the reaction of of oxygen.

Which compound will have the most polarization? A. Magnesium telluride B. Magnesium selenide C. Magnesium sulfide D. Magnesium oxide

A gas is collected in a 34.3L container at a temperature of 31.5°C. Later, the container has a volume of 29.2L, a temperature of 21.0°C and a pressure of 122.2kPa. What was the original pressure on the container?

What does it mean for a cell to be specialized?

A 7.20 L container holds a mixture of two gases at 29 °C. The partial pressures of gas A and gas B, respectively, are 0.179 atm and 0.749 atm. If 0.

Using activated charcoal to separate heavy metals from water is a process known as scrubbing. True or False

If 119.5 g of iron is mixed with 279.50 g of copper (II) nitrate, what is the limiting reagent for the reaction?