If a sample of matter cannot be separated by physical means, what can be said with certainty about that sample?

A It is a pure substance.

B It is an element.

C It is a compound.

D It is a mixture.

Is salt a Elements or a Compound? Is CO2 a Elements or a Compound? Is Gold a Elements or a compound? Is Na a Elements or a compound? Is Oxygen a Elements or a Compound? Is C6H2O6 a Element or a Compound?

A Student Formulated A Hypothesis That Cotton Will Grow Larger Bolls (Pods) If Magnesium Is Added To The Soil. The Student Has Two Experimental Fields Of Cotton, One With Magnesium And One Without.

Unknown element X combines with oxygen to form the compound XO2. If 44.0 grams of element X combines with 8.00 grams of oxygen, what is the atomic mass of element X? A. 16 amu B. 44 amu C. 88 amu D. 176 amu E. 352 amu

We drop a cube of ice into a glass of water. The mass of the cube of ice is 33.1 g and its initial temperature is - 10.2∘C. The mass of the water is 251 g and its initial temperature is 19.7∘C.

How many grams of salt are contained in 200 kg of a 2.6m NaCl solution?

The number of blank always differs in atoms of different elements

Hey student dissolves 5 g of salt and 20 g of water what is the mass of the solution

4 What would the volume of a gas be at - 150°C, if it had a volume of 693 mL at 45°C?

How long does nicotine stay in your system

Compare the densities among the three states of matter (which is highest, lowest?)