All categories

3 years ago

Select the expression that is equivalent to 3x105+5x108.

1 answer:

8 0

When you're dealing with scientific notation (especially when you use an order of operations such as adding on it), it's important to know that you cannot add 10^2 to 3 (for example).

(3 x 10^5) + (5 x 10^8)

When adding exponents, you're only adding the exponents together and not changing the original number (10).

5 + 8 = 13

We now have a sum of 3x5 x10^13

Multiply 3 by 5 to get your new expression.

3 x 5 = 15

15 x 10^13 is what we're left with.

Your answer is A.)

I hope this helps!

You might be interested in

ALEKS Ammonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills

Nikolay [14]

2NH3(g) = N2(g) + 3H2(g)

Before decomposed :

P NH3 = 2.7 atm

After decomposed :

P N2 = 0.54 atm

P H2 = P N2 / 3 = 0.54 / 3 = 0.18 atm

P NH3 = 2.7 - 2(0.18) = 2.34 atm

Pressure equilibrium constant :

Kp = (P N2)(P H2)³ / (P NH3)²

Kp = (0.54)(0.18)³ / (2.34)²

Kp = 5.75 × 10^(-4)

6 0

3 years ago

Which best describes a heterogeneous mixture? 0 A table salt and water O B. alcohol and water O C. oil and vinegar O D. hot tea

Oksi-84 [34.3K]

Answer:

oil and vinegar

the rest would mix well so you can't determine the individual components

Explanation:

6 0

3 years ago

the compressor exerts a pressure of 400 Pa to compress nitrogen gas from 3 L to 1 L. If no heat transfer occurs, how much will t

Triss [41]

Answer:

0.79014 J

Explanation:

According to the first law of thermodynamics:-

$\Delta U = q + w$

Where,

U is the internal energy

q is the heat

w is the work done

From the question,

q = 0 J

The expression for the calculation of work done is shown below as:

$w=P\times \Delta V$

Where, P is the pressure

$\Delta V$ is the change in volume

From the question,

$\Delta V$ = 3 - 1 L = 2 L

P = 400 Pa

The expression for the conversion of pressure in Pascal to pressure in atm is shown below:

P (Pa) = $\frac {1}{101325}$ P (atm)

Given the value of pressure = 43,836 Pa

So,

400 Pa = $\frac {400}{101325}$ atm

Pressure = 0.0039 atm

$w=0.0039\times 2\ atmL$

Also, 1 atmL = 101.3 J

So,

$w=0.0039\times 2\times 101.3\ J=0.79014\ J$ (work is done by the system)

So,

$\Delta U = 0\ J+0.79014\ J =0.79014\ J$

5 0

4 years ago

Identify the types of information that are necessary to communicate with emergency responders. Select one or more: Any chemicals

oksano4ka [1.4K]

Answer:

How the incident happened

Any chemicals involved in an incident

Any other hazards present in the lab

Explanation:

Above are the types of information that are necessary to communicate with emergency responders. The emergency responders ask the first question that how the incident happened. After that they ask that is there any harmful chemicals are present in the laboratory or what types of chemicals present in the laboratory. These questions were asked by the emergency responders in order to give the patient a suitable treatment.

8 0

3 years ago

What is your most convincing piece of evidence?

Sedaia [141]

Answer:

A magician I saw once made a painting of a dove come to life. The bird literally flew out of the painting.

That happened 10 years ago and I'm still wondering how that is even possible.

Explanation:

7 0

3 years ago