The pH level of a substance can be determined by the formula pH = –log[H+], where [H+] is the hydrogen ion concentration in moles per liter. An alkaline substance has a pH level between 7 and 14. Which ion concentration corresponds to an alkaline substance? 3.5 x 10^-16
5.0 x 10^-12
1.0 x 10^-7
1.1 x 10^-4
Please answer asap

B. 5.0 × 10⁻¹² moles per liter.

Step-by-step explanation:

In this exercise we have to calculate the pH levels associated with respective hydrogen ion concentration based on the following formula:

Where is the hydrogen ion concentration, measured in moles per liter.

a) 3.5 × 10⁻¹⁶ moles per liter:

The substance is above the upper bound for alkaline substances.

b) 5.0 × 10⁻¹² moles per liter:

The substance is alkaline.

c) 1.0 × 10⁻⁷ moles per liter:

The substance is not acid nor alkaline.

d) 1.1 × 10⁻⁴ moles per liter:

The substance is acid.

Thus, we concluded that correct answer is B.

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)