3 years ago

In an endothermic reaction would energy be considered a reactant or a product?

1 answer:

4 0

Answer:

In an endothermic reaction, the products have more stored chemical energy than the reactants. In an exothermic reaction, the opposite is true. The products have less stored chemical energy than the reactants. The excess energy in the reactants is released to the surroundings

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Which quantity can be calculated using the equation E = mc2?

lidiya [134]

Energy, mass, and the speed of light squared.
(E, M, and C^2 respectively).

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2 years ago

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Write the balanced chemical equation for the reaction

kykrilka [37]

Answer:

2C +O2 - CO

Explanation:

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2 years ago

Roberto examines two molecular models. He sees that the atoms are the same in each model and are attached in the same order in e

almond37 [142]

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3 years ago

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When a 5.00-g metal piece, A, was immersed in 38.0 mL of water, the water level rose to 50.0 mL. Similarly, when a 5.00-g metal

Mnenie [13.5K]

Answer:

A is denser than B as it's volume for the same mass is smaller.

Explanation:

Hello.

In this case, we first need to take into account that the density of each metal A and B is computed by dividing the mass over the volume of each metal which is actually computed by substracting the volume of water from the volume of the water and the solid:

$V_A=50.0mL-38.0mL=12.0mL\\\\V_B=60.0mL-38.0mL=22.0mL$

Next, we compute the densities as shown below:

$\rho_A=\frac{m_A}{V_A}=\frac{5.00g}{12.0mL}=0.42g/mL\\ \\\rho_B=\frac{m_B}{V_B}=\frac{5.00g}{22.0mL}=0.23g/mL$

In such a way, A is denser is B as it's volume for the same mass is smaller.

Best regards.

4 0

3 years ago

what is the proper scientific notation for 0.000476? a.0.476 × 10-3 b.4.76 × 10-4 c.47.6 × 10-5 d.476 × 10-6

-BARSIC- [3]

B. 4.75 × 10-4 is the answer

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3 years ago