2 years ago

Which of the following is an example of an attempt to improve an environmental problem caused by chemicals

Chemistry

2 answers:

Leto [7]2 years ago

5 0

what are the answer choices?

Kryger [21]2 years ago

5 0

Answer:

Removing lead from gasoline to reduce air pollution .

Explanation:

Answer for apex

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Calculate the density of a solid substance if a cube measuring 2.54 cm on one side has a mass of 108 g/cm3

kozerog [31]

Answer:

6.59 g/cm³

Explanation:

Step 1: Given data

Side of the cube (s): 2.54 cm

Mass of the cube (m): 108 g

Step 2: Calculate the volume of the cube

We will use the following expression.

V = s³ = (2.54 cm)³ = 16.4 cm³

Step 3: Calculate the density of the solid

Density is an intrinsic property, equal to the quotient between the mass and the volume.

ρ = m/V

ρ = 108 g / 16.4 cm³ = 6.59 g/cm³

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2 years ago

A lime has a [H+] concentration of 0.0120 M.<br><br> What is the pH of the lime? 3 sig figs

Novosadov [1.4K]

Answer: pH= 1.92

Explanation:

pH= -log[H+]

pH= -log[0.012]

= 1.92

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3 years ago

In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00?

ohaa [14]

Answer:

The answer to your question is letter A

Explanation:

Data

Mass ratio 1.62 to 1.00

Atomic mass Cr = 52 g

Atomic mass O = 16

Process

1.- Calculate the proportion Chromium to Oxygen to each possible solutions

a) CrO₃ = $\frac{52}{16 x 3} = \frac{52}{48} = 1.08$

b) CrO₂ = $\frac{52}{16 x 2} = \frac{52}{32} = 1.63$

c) CrO = $\frac{52}{16} = 3.25$

d) Cr₂O = $\frac{52 x 2}{16} = \frac{104}{16} = 6.5$

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2 years ago

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2 years ago

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How many miles is 1125.90 feet ?

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it should be 0.213238636

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3 years ago