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2 years ago

How many significant figures are in 6000

Chemistry

2 answers:

hjlf2 years ago

6 0

There are 4 significant figures

BlackZzzverrR [31]2 years ago

3 0

Significant figures are the numbers that compose a whole number.

Since there are 4 digits in 6000 and it's a whole number, the answer is 4.

Hope it helped,

BioTeacher101

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Arrange these compounds by their expected vapor pressure: H2O NCl3 Br2

Tamiku [17]

Answer: Given compounds are arranged in decreasing order of their vapor pressure as follows.

$Br_{2}$ > $NCl_{3}$ > $H_{2}O$

Explanation:

Vapor pressure is defined as the pressure exerted by the vapors which are present on the surface of a liquid. Less is the intermoecular forces present within the molecules of a substance more will be its vapor pressure.

For example, $Br_{2}$ is a gas and there exists Vander waal forces between its molecules. Hence, it has more vapor pressure than $NCl_{3}$ and $H_{2}O$ .

In $H_{2}O$ , there exists hydrogen bonding which is stronger than bonding present in $NCl_{3}$ . So, $H_{2}O$ has low vapor pressure.

In $NCl_{3}$ , there exists dipole-dipole interaction which is stronger than Vander waal forces but weaker than hydrogen bonding.

Therefore, given compounds are arranged in decreasing order of their vapor pressure as follows.

$Br_{2}$ > $NCl_{3}$ > $H_{2}O$

6 0

2 years ago

You are experimenting on the effect of temperature on the rate of reaction between hydrochloric acid (HCI) and potassium iodide

Paraphin [41]

320,512.8 collisions

Easy trick- 273x = 250,000 find the x value and times it by 350.

4 0

2 years ago

If 3.5 g of element X reacts with 10.5 g of element Y to form the compound XY.

irina [24]

Answer:

The percentage by mass of element X is 25 %.

The percentage by mass of element Y is 75 %

Explanation:

X + Y ⇒ XY

3.5 g of element X + 10.5 g of element Y = 14g in total

⇒Element X : 3.5g / 14g = 0.25 ⇒ x 100 % = 25 %

⇒Element Y : 10.5 / 14 = 0.75 ⇒ x 100 % = 75 %

The percentage by mass of element X is 25 %.

The percentage by mass of element Y is 75 %

8 0

2 years ago

RUDIKE [14]

Answer:

THE CURRENT REQUIRED TO PRODUCE 193000 C OF ELECTRICITY IS 35.74 A.

Explanation:

Equation:

Al3+ + 3e- -------> Al

3 F of electricity is required to produce 1 mole of Al

3 F of electricity = 27 g of Al

If 18 g of aluminium was used, the quantity of electricity to be used up will be:

27 g of AL = 3 * 96500 C

18 G of Al = x C

x C = ( 3 * 96500 * 18 / 27)

x C = 193 000 C

For 18 g of Al to be produced, 193000 C of electricity is required.

To calculate the current required to produce 193 000 C quantity of electricity, we use:

Q = I t

Quantity of electricity = Current * time

193 00 = I * 1.50 * 60 * 60 seconds

I = 193 000 / 1.50 * 60 *60

I = 193 000 / 5400

I = 35.74 A

The cuurent required to produce 193,000 C of electricity by 18 g of aluminium is 35.74 A

3 0

2 years ago

How many moles of carbon are in 7.87*10^7 carbon atoms

bonufazy [111]

There is 7 moles in C

6 0

2 years ago

Read 2 more answers