All categories

3 years ago

HELLO MAY SOMEONE PLZ HELP ME ON THIS!!!;$7&:

Chemistry

1 answer:

Oliga [24]3 years ago

7 0

Answer:

Variable data is defined as information and figures used to build control charts. Variable data can be used to create average (X-bar) charts, range charts, and sample standard deviation charts or "S-charts."

You might be interested in

What are essential elements in plants?

madam [21]

Answer:

Chlorophyll is one. I can't quite remember other

5 0

3 years ago

Hey, if anyone is really good at Chemistry can you please let me know? I can give either my pa dlet or my email, thanks :)

Vesnalui [34]

Answer:

i'm pretty good at it

Explanation:

8 0

3 years ago

Read 2 more answers

Use the ruler to determine the length of this object. Record your answer to the nearest tenth. The object is ____ long.

VLD [36.1K]

The object is 2.7 cm long

7 0

3 years ago

A gaseous mixture of O2 and N2 contains 37.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the tot

kondor19780726 [428]

Answer: The partial pressure of oxygen in the mixture if the total pressure is 525 mmHg is 310 mm Hg

Explanation:

mass of nitrogen = 37.8 g

mass of oxygen = (100-37.8) g = 62.2 g

Using the equation given by Raoult's law, we get:

$p_A=\chi_A\times P_T$

$p_{O_2}$ = partial pressure of $O_2$ = ?

$\chi_{O_2} = mole fraction of O_2=\frac{\text{Moles of }O_2}{\text{Total moles}}$

$P_{T}$ = total pressure of mixture = 525 mmHg

${\text{Moles of }O_2}=\frac{\text {Given mass}}{\text {Molar mass}}=\frac{62.2g}{32g/mol}=1.94moles$

${\text{Moles of }N_2}=\frac{\text {Given mass}}{\text {Molar mass}}=\frac{37.8g}{28g/mol}=1.35moles$

Total moles = 1.94 + 1.35 = 3.29 moles

$\chi_{O_2}=\frac{1.94}{3.29}=0.59$

$p_{O_2}=\chi_{O_2}\times P_T=0.59\times 525=310mmHg$

Thus the partial pressure of oxygen in the mixture if the total pressure is 525 mmHg is 310 mm Hg

7 0

3 years ago

What is meant by polar molecule?

Lostsunrise [7]

A polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically. Water (H2O) is an example of a polar molecule since it has a slight positive charge on one side and a slight negative charge on the other.

3 0

3 years ago