Which of the following tools measures mass?

a balance

a scale

a cyclometer

a graduated cylinder

30. A. An organic compound - A (C4H80) forms phenyl hydrazone with phenyl hydrazine and reduces Fehling's mpt any two questions: solution. It has negative iodoform test. Identify the organic compound A.

How do scientists analyze the data they collect

Describe the saponification process

We dissolve 2.45 g of sugar in 200.0 g water. what is the mass percent of sugar in the solution?

Assume that 8.5 L of iodine gas (I2) are produced at STP according to the following balanced equation:2KI (aq) + Cl2 ( g. → 2KCl (aq) + I2 ( g. How many moles of I2 are produced?

Which principle explains why it is necessary to have safety belts in cars?

Hydrochloric acid is purchased in 12 molar concentrations. If I needed 200 ml of 2.0 molar HCl, how many milliliters of the concentrated solution would I need

Which of the following represents a chemical change? Bending a wire Freezing of water Fireworks exploding Melting of a wax candle

5.00 L of a gas is collected at 100K and then allowed to expand to 20.0 L. What must the new temperature be in order to maintain the same pressure? A. 400 °C B. 127 °C C. 223 °C D. 627°C

Before the initial explosion was the matter hot or cold