Which of the postulates of Dalton's atomic theory explains why we can calculate a theoretical yield for a chemical reaction?

Which of Dalton's postulates about atoms are inconsistent with later observations? Do these inconsistencies mean that Dalton was wrong? Is Dalton's model still useful? Explain.

Express using negative exponents:

$$\dfrac{1}{9^2}$$

For each primary trigonometric ratio, determine the corresponding reciprocal ratio. a) sin

$$\theta=\frac{1}{2}$$

b) cos

$$\theta=\frac{3}{4}$$

c) tan

$$\theta=\frac{3}{2}$$

d) tan

$$\theta=\frac{1}{4}$$

The lesson before describes the postulates of Dalton's atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications made today.

How is water different from hydrogen peroxide $\left(\mathrm{H}_2 \mathrm{O}_2\right)$ even though both compounds are composed of only hydrogen and oxygen?

The lesson before describes the postulates of Dalton's atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications made today.

How are atoms of hydrogen different from atoms of helium? How can H atoms be similar to He atoms?

The lesson before describes the postulates of Dalton's atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications made today.

How are atoms of hydrogen identical to each other and how can they be different from each other?

The lesson before describes the postulates of Dalton's atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications made today.

What happens in a chemical reaction and why is mass conserved in a chemical reaction?

What mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH?

Heating a sample of $\mathrm{Na}_2 \mathrm{CO}_3 \cdot x \mathrm{xH}_2 \mathrm{O}$ weighing $4.640 \mathrm{~g}$ until the removal of the water of hydration leaves $1.720 \mathrm{~g}$ of anhydrous $\mathrm{Na}_2 \mathrm{CO}_3$. What is the formula of the hydrated compound?

The lesson before describes the postulates of Dalton's atomic theory. With some modifications, these postulates hold up very well regarding how we view elements, compounds, and chemical reactions today. Answer the following questions concerning Dalton's atomic theory and the modifications made today.

The atom can be broken down into smaller parts. What are the smaller parts?

There is a higher concentration of air molecules inside an inflated balloon than there is outside the balloon. Because of their constant random motion, the molecules inside press against the balloon and keep it taut. How is the pressure exerted by these air molecules similar to turgor pressure? How is it different?

The following quantities are placed in a container: $1.5 \times 10^{24}$ atoms of hydrogen, $1.0 \mathrm{~mol}$ of sulfur, and $88.0 \mathrm{~g}$ of diatomic oxygen. (a) What is the total mass in grams for the collection of all three elements? (b) What is the total number of moles of atoms for the three elements? (c) If the mixture of the three elements formed a compound with molecules that contain two hydrogen atoms, one sulfur atom, and four oxygen atoms, which substance is consumed first? (d) How many atoms of each remaining element would remain unreacted in the change described in (c)?

Solve the Initial Value Problem. y' + (tanh x)y = 1, y(0) = 3