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Westkost [7]
3 years ago
15

How many calcium ions are in 0.5 mol of CaCl2?

Mathematics
2 answers:
Sauron [17]3 years ago
6 0

Answer:

1.5 mol ions

Step-by-step explanation:

slamgirl [31]3 years ago
3 0
1 Calcium  ion / formula unit times  0.5 moles CaCl2 x 6.02 x 10^23 = 

<span>3.01 x 10^23 Calcium  ions.</span>
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Tell whether x and y show direct variation, inverse variation or - y/4 = 2x
Sophie [7]

9514 1404 393

Answer:

  direct variation

Step-by-step explanation:

The given equation can be written in the direct variation form ...

  y = kx

  y = -8x . . . . rewrite of the given equation (multiply by -4)

This is an example of direct variation.

4 0
3 years ago
Suppose the names of the months of the year are placed in a hat and a name is drawn at random. (a) list the sample space for thi
ollegr [7]

(a)

The sample space is a set whose elements are all the possible outcomes for the experiment. Since we will extract one of the months of the years, the sample space is the set composed by all the 12 months:

\Omega = \{ \text{January},\ \text{February},\ldots,\text{December}\}

(b)

An event is a subset of the sample space. Events are often defined by their properties. In this example, the event E is the subset of the sample space defined as

E = \{ x \in \Omega: x \text{ starts with the letter J}\}

So, we have

E = \{\text{January},\ \text{June},\ \text{July}\}

(c)

If all outcomes have equal probability, then the probability of an event is the ratio bewteen its cardinality, and the cardinality of the whole sample space:

P(E) = \dfrac{n(E)}{n(\Omega)} = \dfrac{3}{12} = \dfrac{1}{4}

In words, since there are three months beginning with J out of 12 months, we have a probability of 3 over 12 to pick a month starting with J, which simplifies to 1 over 4.

3 0
3 years ago
meg has $20 in a savings account that earns 10% annually. the interest is not compounded. how much will she have in 1 year
snow_tiger [21]
<h2>Answer: 22$</h2>

Step-by-step explanation: 10% of 20 is 2 so 20 + 2 = 22.

Hope this helps! ;)

4 0
3 years ago
Sarah borrows £500 for 2 years at a rate of 15% to buy a
andrew11 [14]

Answer: 150 pounds

Step-by-step explanation:

3 0
3 years ago
What is the domain of the square root function graphed below?
lesya [120]

Answer:

x \geqslant 0

Option D is the right option.

Explanation:

Observe from the graph that the value of X starts at X=0 and the graph is going to the right infinitely.

So the domain of the function should be:

x \geqslant 0

Hope this helps...

Good luck on your assignment..

4 0
3 years ago
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