4 years ago

The course of a chemical reaction can be traced by using a

Chemistry

2 answers:

Alexeev081 [22]4 years ago

5 0

I believe the answer would be D)radioisotope

Vladimir [108]4 years ago

4 0

Answer: D radioisotopes

Explanation: radioactive isotopes are used because they emits radiation. With these radiations, scientists can trace the course of a chemical reaction

You might be interested in

The variable____ and _____ affect the gravitational force between objects

Gwar [14]

Mass and distance.
Hope this helps:)

6 0

3 years ago

When he carried out his experiment, Nathan found that he had three small

Ann [662]

I think it's either B or D

Explanation:

it really depends on how differently shaped the beakers are sorry if this doesn't help very much

3 0

3 years ago

On may 10th it's gonna be my birthday and my mum don't know what to get me what do u think i would like my bio: creative,artisti

pickupchik [31]

Answer:

It’s past your b day... sorry

Explanation:

8 0

3 years ago

An experiment was conducted with a 1.57 gram starting mass of copper. How many grams of cooper were collected if the yield was 8

IRINA_888 [86]

Answer:

1.26 g of Cu

Explanation:

Since we have to find the percentage of the given amount so...

Yield in grams = (Initial mass used / 100) x Percentage Yield

Yield in grams = (1.57 / 100) x 80.6 = 1.26 g of Cu

7 0

3 years ago

PLEASE PLEASE HELP!

valentinak56 [21]

Answer: The number of grams of $H_2$ in 1620 mL is 1.44 g

Explanation:

According to ideal gas equation:

$PV=nRT$

P = pressure of gas = 1 atm (at STP)

V = Volume of gas = 1620 ml = 1.62 L (1L=1000ml)

n = number of moles = ?

R = gas constant = $0.0821Latm/Kmol$

T =temperature = $273K$

$n=\frac{PV}{RT}$

$n=\frac{1atm\times 16.2L}{0.0821Latm/K mol\times 273K}=0.72moles$

Mass of hydrogen = $moles\times {\text {Molar mass}}=0.72mol\times 2g/mol=1.44g$

The number of grams of $H_2$ in 1620 mL is 1.44 g

8 0

3 years ago