Which of the following methods can be used to determine the limiting reagent in an equation?

Hen solid kbr is dissoved in water, the solution gets colder. this is an example of a(n) ________ reaction.

Sonja [21]

Endothermic reactions. These are reactionsthat take in energy from the surroundings. The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to get colder

7 0

3 years ago

If u (x) = negative 2 x squared and v (x) = StartFraction 1 Over x EndFraction, what is the range of (u circle ma poottay

KonstantinChe [14]

The range is negative numbers.
The interval for the range is .
***You might want to look at your functions again because I don't see a choice that matches.
Step-by-step explanation:
Given functions:

We are asked to find the range of .
I'm also going to look at the domain just to see if this possibly might change my range .
is the inner function. So we will consider the domain of that function first.
You only have to worry about division by zero for the function .
Since we are dividing by , we don't want to be zero.
So far the domain is all real numbers except .
Now let's move out.
exists for all numbers, . So we didn't want to include from before.
Now let's put it together:

So the domain is still all real numbers except at since we cannot divide by 0 and is 0 when .
with .
is positive for all numbers except .
So is negative for all numbers since negative divided by positive is negative.
So the range is only negative numbers.
Let's also look at the inverse:

Multiply both sides by :

Divide both sides by :

Take the square root of both sides:
.
So can't be 0 and it also can't be positive because the inside of the square root will be negative (since negative divided by positive results in negative).

5 0

3 years ago

Calculate how many grams of the product form when 16.7 g of oxygen gas completely reacts with solid chromium. Assume that there

34kurt

<u>Answer:</u> The mass of product formed is 79.344 g.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of oxygen = 16.7 g

Molar mass of oxygen = 32 g/mol

Putting values in equation 1, we get:

$\text{Moles of oxygen}=\frac{16.7g}{32g/mol}=0.522mol$

The chemical reaction for the formation of chromium oxide follows the equation:

$4Cr+3O_2\rightarrow 3Cr_2O_3$

By Stoichiometry of the reaction:

3 moles of oxygen produces 3 moles of chromium oxide.

So, 0.522 moles of oxygen will produce = $\frac{3}{3}\times 0.522=0.522mol$ of chromium oxide.

Now, calculating the mass of chromium oxide from equation 1, we get:

Molar mass of chromium oxide = 152 g/mol

Moles of chromium oxide = 0.522 moles

Putting values in equation 1, we get:

$0.522mol=\frac{\text{Mass of chromium oxide}}{152g/mol}\\\\\text{Mass of chromium oxide}=79.344g$

Hence, the mass of chromium oxide produced in the given reaction is 79.344 grams.

3 0

3 years ago

Solutions with a higher concentration of solutes than the concentration inside the cell are: Solutions with a higher concentrati

Nadusha1986 [10]

Answer:

A

Explanation:

A hypertonic solution is one in which the concentration of the solute is greater than that of those inside the cell. This means that there is a solution with a higher concentration of solute compared to what is obtainable inside the cell environment.

Hence, we say that the solutions are hypertonic since they contain essentially solutes that are more concentrated than those inside the cell

7 0

3 years ago

Can someone help? Thank you.

____ [38]

that' the answer i don't need an explanation

3 0

2 years ago