All categories

3 years ago

0.000068 g Express your answer as an integer.

Chemistry

2 answers:

Fittoniya [83]3 years ago

6 0

Answer: This unit is equal to $68\mu g$

Explanation:

An integer is defined as a whole number which can be positive, negative or zero. This cannot be written in fractions or decimals.

The given number in the question is written in decimal form. So, to convert it into a integer, we will convert the unit of 'grams' to 'micrograms'.

To convert grams into micrograms, we use the conversion factor:

$1g=10^6\mu g$

Converting 0.000068 g into micrograms, we get:

$0.000068g=(0.000068\times 10^6)\mu g=68\mu g$

The above number is a positive integer. Hence, this unit is expressed in integer and is equal to $68\mu g$

ivann1987 [24]3 years ago

5 0

6.8x10^5? Scientific notation

You might be interested in

What information does a solubility table give?

guajiro [1.7K]

Answer:

Option D - It tells which compounds will dissolve in water.

Explanation:

It is used to predict whether or not a given ionic compound is soluble.

4 0

2 years ago

Read 2 more answers

Motion is...

Elanso [62]

A change in position over a certain amount of time

6 0

3 years ago

A sample of nitrogen gas occupies a volume of 2.55 L when it is at 755 mm Hg and 23 degrees Celsius. Use this information to det

ivolga24 [154]

Answer: The number of moles of nitrogen gas are 0.1043 moles and the pressure when volume and temperature has changed is 461.6 mmHg

Explanation:

To calculate the amount of nitrogen gas, we use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the gas = 755 mmHg

V = Volume of the gas = 2.55 L

T = Temperature of the gas = $23^oC=[23+273]K=296K$

R = Gas constant = $62.364\text{ L.mmHg }mol^{-1}K^{-1}$

n = number of moles of nitrogen gas = ?

Putting values in above equation, we get:

$755mmHg\times 2.55L=n\times 62.364\text{ L.mmHg }mol^{-1}K^{-1}\times 296K\\\\n=\frac{755\times 2.55}{62.364\times 296}=0.1043mol$

To calculate the pressure when temperature and volume has changed, we use the equation given by combined gas law.

The equation follows:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1,V_1\text{ and }T_1$ are the initial pressure, volume and temperature of the gas

$P_2,V_2\text{ and }T_2$ are the final pressure, volume and temperature of the gas

We are given:

$P_1=755mmHg\\V_1=2.55mL\\T_1=23^oC=[23+273]K=296K\\P_2=?\\V_2=4.10L\\T_2=18^oC=[18+273]K=291K$

Putting values in above equation, we get:

$\frac{755mmHg\times 2.55L}{296K}=\frac{P_2\times 4.10L}{291K}\\\\P_2=\frac{755\times 2.55\times 291}{4.10\times 296}=461.6mmHg$

Hence, the number of moles of nitrogen gas are 0.1043 moles and the pressure when volume and temperature has changed is 461.6 mmHg

6 0

3 years ago

Read 2 more answers

Amiraneli [1.4K]

Answer:

Explanation:

The reason why C is true is because this species of plant requires certain things to survive, and without said requirements they will die. Hence, the animal that is unable to compete will die and be eliminated from the ecosystem. Hope that helps!

6 0

3 years ago

Acid formulas usually start with ______________ because they have hydrogen atoms combined with other atoms in their molecules

mina [271]

Answer:

Explanation:

Example,

HCl for hydrochloric acid

H2SO4 for sulphuric acid

HNO3 for nitric (v) acid

8 0

3 years ago