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2 years ago

SEP math! Each day, the average person's

Chemistry

1 answer:

Lesechka [4]2 years ago

5 0

Answer:

Quarts of blood = 72000

Quarts of urine = 720

Explanation:

<h3><u>Given</u>;</h3>

Each day, the average person's
kidneys filter around 200 quarts of blood.
About 2 quarts of urine is produced in the
process.

In one year the average person's kidney filter quarts of blood and quarts of urine.

Here, we know that

1 year = 365 days

For blood

200 × 365 = 72000

For urine

2 × 365 = 720

Thus, The average person's kidney filters 72000 quarts of blood and 720 quarts of urine.

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If element X has 59 protons, how many electrons does it have?

laiz [17]

If element X has 59 protons then element X has 59 electrons.

Side note: as long as an element stays an atom the number of protons and electrons will always have the same value.

8 0

3 years ago

Suppose the half-life is 9.0 s for a first order reaction and the reactant concentration is 0.0741 M 50.7 s after the reaction s

bazaltina [42]

<u>Answer:</u> The time taken by the reaction is 84.5 seconds

<u>Explanation:</u>

The equation used to calculate half life for first order kinetics:

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

where,

$t_{1/2}$ = half-life of the reaction = 9.0 s

k = rate constant = ?

Putting values in above equation, we get:

$k=\frac{0.693}{9}=0.077s^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$ ......(1)

where,

k = rate constant = $0.077s^{-1}$

t = time taken for decay process = 50.7 sec

$[A_o]$ = initial amount of the reactant = ?

[A] = amount left after decay process = 0.0741 M

Putting values in equation 1, we get:

$0.077=\frac{2.303}{50.7}\log\frac{[A_o]}{0.0741}$

$[A_o]=3.67M$

Now, calculating the time taken by using equation 1:

$[A]=0.0055M$

$k=0.077s^{-1}$

$[A_o]=3.67M$

Putting values in equation 1, we get:

$0.077=\frac{2.303}{t}\log\frac{3.67}{0.0055}\\\\t=84.5s$

Hence, the time taken by the reaction is 84.5 seconds

6 0

4 years ago

Compared to a swimming pool filled with water, a hot cup of coffee has higher temperature, but less thermal energy

Julli [10]

Thermal energy equation is;
Q = mcΔθ

Q = Thermal energy
m = mass
c = specific heat
Δθ = Temperature difference

the hot cup of coffee has a higher temperature. But the mass of coffee is very low compared to the mass of water in swimming pool. The maximum temperature for coffee only can go up to 100 ⁰C since the boiling point of water is 100 ⁰C. But the mass of water in swimming pool is very large and the thermal enegy is very high compared to the coffee cup due to that reason.

3 0

3 years ago

Why is the table salt considered to be a compound, while sodium is not??

Brrunno [24]

Answer:

Table salt is considered to be a compound because it is made up of two elements (sodium and chloride,) while sodium itself is a raw element. That's why table salt is considered to be a compound, while sodium is not.

Hope this helped, have a nice day! :)

7 0

3 years ago

Read 2 more answers

For a solution containing 6.38% para-diclorobenzene by mass in benzene, the density of the solution as a function of temperature

antiseptic1488 [7]

Answer:

T=34.20 °C

Explanation:

The formula given by the problem is

ρ= 1.5794 - 1.836*10⁻³ *(T-15)

ρ is density (in g/mL), and T is temperature (in °C).

To solve the problem we use a ρ of 1.543 g/mL and solve the equation for T:

1.543 = 1.5794 - 1.836*10⁻³ *(T-15)

0.0364 = 1.836*10⁻³ *(T-15)

19.1983=T-15

T=34.20 °C

7 0

3 years ago