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3 years ago

How many significant figures are in the measurement 10,010 grams?

1 answer:

7 0

4 sigfigs because the 0 at the end is not significant unless there is a .(period)
the 0s inbetween numbers are always significant.

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Element M has two isotopes,^104M and ^106M.

snow_lady [41]

To calculate atomic mass, you have to take to weighted average of the isotopes' masses. What that means is M = RA*106 + (1 – RA)*104, where RA is relative abundance expressed in decimal form. If you simplify the right side of that equation, you get M = 2*RA + 104. Doing a little more algebra yields RA = (M –104)/2 = (104.4 – 104)/2 = 0.4 / 2 = 0.2, which is 20%. So the answer is B.

3 0

3 years ago

4. The volume of a sample of a gas at STP is 200.0 ml. If the pressure is increased to 4.00 atmospheres (temperature constant),

Elina [12.6K]

Answer : The value of new volume is, 50.0 mL

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$

or,

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure at STP = 1 atm

$P_2$ = final pressure = 4.00 atm

$V_1$ = initial volume at STP = 200.0 mL

$V_2$ = final volume = ?

Now put all the given values in the above equation, we get:

$1atm\times 200.0mL=4.00atm\times V_2$

$V_2=50.0mL$

Therefore, the value of new volume is, 50.0 mL

6 0

3 years ago

Do you know any of the answers

zzz [600]

Answer:

soorry i ddsmfcj know

Explanation:

4 0

3 years ago

What is chemical reaction?<br>

Aliun [14]

Answer:

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction

3 0

2 years ago

Read 2 more answers

The radioactive atom R 88 210 a is an alpha emitter. What nucleus does it produce?

olasank [31]

Answer:

X 86 206

Explanation:

Radioactive atoms are nuclei that can under go disintegration to emit either an alpha particle, beta particle or gamma radiation. The process could be spontaneous or stimulated.

When a radioactive atom R 88 210 emits alpha particle, it would produce an element with atomic number 86 and mass number 206 i.e X 86 206. An alpha particle is usually a helium nucleus.

$R^{210}$ ⇒ $x^{206}$ + $He^{4}$ + energy

5 0

3 years ago