What is the oxidation number of alkaline earth metals in their compounds? Of alkali metals?

Explain why not all oxidation reactions involve oxygen.

Consider the following surfaces f(x, y, z)=0, which may be regarded as a level surface of the function w=f(x, y, z). A point P(a, b, c) on the surface is also given. The set of all vectors orthogonal to the gradient with their tails at P form a plane. Find an equation of that plane (soon to be called the tangent plane). $$ f ( x , y , z ) = 8 - x y z = 0 ; P ( 2,2,2 )$ $$

In

$$CF_3Cl$$

the C-Cl bond-dissociation energy is 339 kJ / mol. In

$$CCl_4$$

the C-Cl bond-dissociation energy is 293 kJ / mol. What is the range of wavelengths of photons that can cause C-Cl bond rupture in one molecule but not in the other?

Choose the best answer. Which material constitutes the largest component of municipal solid waste? (a) metals (b) yard waste (c) food scraps (d) paper

When metals combine with non-metals the metallic atoms tend to?

Let W be the vector space of upper triangular

$$2 \times 2$$

matrices. (a) Find a linear transformation

$$T : M _ { 22 } \rightarrow M _ { 22 }$$

such that ker(T) = W. (b) Find a linear transformation

$$T : M _ { 22 } \rightarrow M _ { 22 }$$

such that range(T) = W.

Evaluate the expression when

$$x = - 2 \frac { 5 } { 8 } , y = \frac { 3 } { 10 }$$

, and

$$z = 6 \frac { 3 } { 4 }$$

.

$$z \div x \cdot y$$

Write the standard equation of the circle with the given center and radius. Center (7, -6), radius 8

Which of the ordered pairs (1,1),(4,-2), and (3,-1)are in the relation given by 3x+4y=5?

A

$$19 \frac { 1 } { 2 } ft$$

ladder leans against a building. The base of the ladder is

$$7 \frac { 1 } { 2 } ft$$

from the building. How high up the building does the ladder reach?

Use the dot product to find IuI.

$$u=3j$$

Draw the figure and its reflection in the x-axis. Identify the coordinates of the image. 10. A(3, 2), B(4, 4), C(1, 3)

Find the sum. -17 + 8