Which of the statements is correct?
2 answers:
You might be interested in
Answer:
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
Thus, for the given masses of reactants we should compute the limiting reactant for which we first compute the available moles of iron (II) oxide:
Next, we compute the consumed moles of iron (II) oxide by the 10.0 g of magnesium, considering their 1:1 molar ratio in the chemical reaction:
Therefore, we can notice there is less consumed iron (II) oxide than available for which it is in excess whereas magnesium is the limiting reactant. In such a way, the produced mass of iron turns out:
Regards.
The block will sink
Explanation:
In general, an object with a higher density than water will sink in it, and one with a lower density will float. Now, to know if the block will float or sink, the first step is to calculate the density of the block, and to do this, the volume and mass of the block are required.
Mass of the block: 30 grames
Volume of the block:
The volume of the block is not provided, but this can be found using the dimensions given.
V (Volume) = s (side) x s x s
V = 1.5 cm x 4.8 cm x 2.3 cm
V = 16.56
Density of the block:
To find the density simply divide the mass into the volume
D (density) = M (Mass) ÷ V (Volume)
D = 30 grams ÷ 16.56
D = 1. 811 grams/
The density of the block is 1. 811 grams/
Additionally, the density of the water is 1 gram/ or 1 gram/mL. According to this, the density of the block is higher than the density of the water, and therefore this is the block sinks.