What is the sum of the coefficients in the balanced chemical equation for the combustion of acetone, $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}(l)$, in air?

How to write the balanced equation for the reaction between boron trifluoride (BF$_3$) and water (H$_2$O)?

Imagine that in 10 rolls of a balanced die, the number 6 appeared exactly three times. What is the probability that the first three rolls each yielded the number 6?

a. Write a balanced symbol equation for the reaction of barium carbonate with dilute nitric acid.

b. Which one of the three compounds listed will decompose at the lowest temperature?

i. calcium carbonate, strontium carbonate, barium carbonate

ii. barium nitrate, calcium nitrate, magnesium nitrate

c. Write a balanced chemical equation, including state symbols, for the thermal decomposition of:

i. strontium carbonate

ii. barium nitrate.

The balanced difference quotient $f^{\prime}(a) \approx \frac{f(a+0.0001)-f(a-0.0001)}{0.0002}$ is the average rate of change of f on what interval?

A boy measures the thickness of a human hair by looking at it through a microscope of magnification

$$100\times$$

. After 25 observations, the boy finds that the average width of the hair in the field of view of the microscope is 3.8 mm. What is the estimate on the thickness of hair?

Anaya cautions his readers not to “romanticize old age.” Does Anaya romanticize, or view in an unrealistic way, his experiences with his grandfather? Support your answer with examples from the essay.

What is the balanced net ionic equation for the following reaction in an acidic solution?

$$\mathrm{Cu}+\mathrm{NO}_3{ }^{-} \longrightarrow \mathrm{Cu}^{2+}+\mathrm{N}_2 \mathrm{O}$$

Write the balanced chemical equations for the ($1$) reaction of each of the following amines with water and ($2$) neutralization with $HBr$: $N$-methylaniline

Chlorine can undergo a redox reaction in which it is simultaneously oxidized and reduced. Write a balanced equation for the following in an acidic solution.

$$\mathrm{Cl}_2(a q) \longrightarrow \mathrm{Cl}^{-}(a q)+\operatorname{HOCl}(a q)$$

Using the "Solubility Guidelines" table, write the balanced chemical equation and the net ionic equation for the reaction of aqueous mercury(II) chloride and aqueous potassium sulfide.

Imagine you are at a restaurant with Ramiro, a friend who complains about everything. Complete the sentences with the appropriate forms of este, ese or aquel, based upon the point of view of Ramiro.

_______________ chicos comen mucho.

Write a balanced equation for the complete combustion of each compound. Assume that the products are carbon dioxide and water. octane (C$_8$H$_{18}$)

Some readers feel that Buddy's friend is a realistic character, but others feel she is too good to be believable-that people like this don't exist in real life. Which point of view is closer to yours? Why?