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3 years ago

Which two elements have similar characteristics Plz answer right hry

Mathematics

1 answer:

zalisa [80]3 years ago

7 0

Fluorine and Chlorine.

Step-by-step explanation:

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What is 30-25 divided by 5, pls give how you did it

Aleks04 [339]

Use PEMDAS - 30 - (25/5)

- 30 - 5 = 25

25 is the answer

8 0

3 years ago

Read 2 more answers

The sum of three numbers is 8. The first number minus the second plus the third is 4. The first minus the third is 2 more than t

Natalija [7]

The numbers are 3+2+3=8 , the first number minus the second and the third is 4 then you get 3-2+3=4
So your overall anwser is 3+2+3=8

8 0

3 years ago

Element X decays radioactively with a half life of 13 minutes. If there are 110 grams of Element X, how long, to the nearest ten

Vaselesa [24]

Answer : The time taken by the element to decay to 2 grams is, 75.2 minutes

Step-by-step explanation:

Half-life = 13 min

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{13\text{ min}}$

$k=0.0533\text{ min}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $0.0533\text{ min}^{-1}$

t = time passed by the sample = ?

a = initial amount of the reactant = 110 g

a - x = amount left after decay process = 2 g

Now put all the given values in above equation, we get

$t=\frac{2.303}{0.0533}\log\frac{110}{2}$

$t=75.2\text{ min}$

Therefore, the time taken by the element to decay to 2 grams is, 75.2 minutes

7 0

4 years ago

How do I find the exact product of 379 & 8?

xxMikexx [17]

Product means the result you get after multiplying. So you have to multiply the two numbers. 379*8 = 3032

5 0

4 years ago

Suppose that you want to mix two coffees in order to obtain 100 pounds of a blend. If x represents the number of pounds of coffe

Fantom [35]

Answer:

The required expression that represents the number of pound of coffees B is $100-x$

Step-by-step explanation:

Consider the provided information.

You want to mix two coffees in order to obtain 100 pounds of a blend.

Let x represents the number of pounds of coffee A and y represents the number of pounds of coffee B.

The obtained weight is 100 pounds.

$x+y=100$

$y=100-x$

Hence, the required expression that represents the number of pound of coffees B is $100-x$

8 0

3 years ago