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lesya692 [45]
3 years ago
11

The ____ is the time required for one half of the atoms of a radio scope to ____.

Chemistry
1 answer:
mash [69]3 years ago
7 0
First blank is: Half-Life
Second Blank is: decay into its products
You might be interested in
05. When a gold pebble is placed in a graduated cylinder that contains 12.0 mL of water, the water level rises
OLga [1]

Answer:

142.82 g

Explanation:

The following data were obtained from the question:

Volume of water = 12 mL

Volume of water + gold = 19.4 mL

Density of gol= 19.3 g/cm³

Mass of gold =.?

Next, we shall determine the volume of the gold. This can be obtained as follow:

Volume of water = 12 mL

Volume of water + gold = 19.4 mL

Volume of gold =.?

Volume of gold = (Volume of water + gold) – (Volume of water)

Volume of gold = 19.4 – 12

Volume of gold = 7.4 mL

Finally, we shall determine the mass of the gold as follow:

Note: 1 mL is equivalent to 1 cm³

Volume of gold = 7.4 mL

Density of gol= 19.3 g/cm³ = 19.3 g/mL

Mass of gold =?

Density = mass /volume

19.3 = mass of gold /7.4

Cross multiply

Mass of gold = 19.3 × 7.4

Mass of gold = 142.82 g

Therefore, the mass of the gold pebble is 142.82 g

6 0
3 years ago
Who or what has had the biggest influence on your thoughts about chemistry?
vampirchik [111]

Answer:

My chemistry teacher from my sophomore year.

Explanation:

I took class online last year and he was an older teacher and really didn't know how to use a computer. I asked for help multiple times and he would tell me to look the answer up. I would watch countless videos and still wouldn't understand. He ended up failing me that year and I had summer school. To this day, I dislike chemistry because of him.

3 0
2 years ago
Is chocolate milk a pure substance or mixture
Valentin [98]
Mixture; it contains water, surgar, fat, protein, etc.
5 0
3 years ago
Silver nitrate reacts with calcium to make calcium nitrate and silver. The reaction is exothermic and produces 18.7 kJ/mol of en
denis-greek [22]

Answer:

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.

Explanation:

AgNO_3+Ca\rightarrow Ag+CaNO_3,\Delta H_{rxn}=-18.7 kJ/mol

Mass of silver nitrate = 14.8 g

Moles of silver nitrate = \frac{14.8 g}{170 g/mol}=0.08706 mol

According to reaction, when 1 mole of silver nitrate reacts with 1 mole of calcium it gives 18.7 kJ of heat.

Then amount of heat released when 0.08706 moles of silver nitrate reacts :

0.08706\times 18.7 kJ=1.628 kJ\approx 1.63 kJ

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.

6 0
2 years ago
a car with a mass of 1.2 × 103 kilograms is moving at a speed of 18 meters/second. It is hit by a truck from behind and its spee
aalyn [17]

Answer: Value of impulse is 2.4\times 10^3\text{kg m/s}

Explanation: lmpulse is defined as the amount of force acting over a short time interval 't' which is equal to the change in momentum of the body having mass 'm'.

Mathematically,

J=F\times t=m\Delta v

And,

\Delta v=v_2-v_1

Given:

m=1.2\times 10^3kg\\v_1=18m/s\\v_2=20m/s

Putting values in above equation, we get:

J=m(v_2-v_1)=1.2\times 10^3(20-18)\text{ kg m/s}

J=2.4\times 10^3\text{kg m/s}

6 0
3 years ago
Read 2 more answers
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