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Katarina [22]
3 years ago
5

Radioactive nuclei can emit alpha, beta or gamma radiation.

Chemistry
1 answer:
Mama L [17]3 years ago
5 0

Gamma radiation is the most penetrating. It can penetrate air, paper or thin metal. It may only be stopped by many centimetres of lead or many metres of concrete.

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A student wants to do scientific research on how aquatic plants in lakes have changed over time. What field of science does this
Mice21 [21]

Answer:

The right field is oceanography

5 0
4 years ago
Determine the empirical formula of a compound containing 47.37 grams of carbon, 10.59 grams of hydrogen, and 42.04 grams of oxyg
inysia [295]

Answer:

Mass of C = 47.37g

Mass of H = 10.59g

Mass of O = 42.04g

The total mass of these elements is 100g, taking a proportion of their molar masses.

C = 47.37/12= 3.95

H = 10.59/1 = 10.59

O = 42.04/16= 2.63.

Dividing through with the smallest proportion which is 2.63

C=3.95/2.63 = 1.5

H =10.59/2.63 =4

O = 2.63/2.63= 1

Multiplying through by 2 to get a whole number.

C = 1.5x2 = 3

H= 4x2 = 8

O = 1x2= 2

The empirical formula is C3H6O2

(Empirical formula)n= molecular mass

(C3H8O2)n =228.276

(12x3 +8+16x2)n= 228.276

76n = 228.276

n = 228.276/76

n = 3

Molecular formula = Empirical formula

=(C3H8O2)3 = C9H24O6

The molecular formula is C9H24O6

4 0
3 years ago
A certain amount of gas at 25 C and at a pressure of 0.800 atm is contained in a glass vessel. Suppose that the vessel can with
sp2606 [1]

Answer:

=745 Kelvin

Explanation:

  • According to the pressure law the relationship between the pressure and absolute temperature of a  gas at a constant volume is directly proportional.
  • An increase in temperature causes a corresponding increase in pressure at a constant volume.

That is;

P\alpha T

Mathematically;

P = kT\\(Constant)k =\frac{P}{T} \\

When there are two varying conditions;

\frac{P1}{T1} =\frac{P2}{T2}

In this case;

P1 = 0.8 atm

T1 = 25+273 = 298 K

P2 =2.00 atm

T2= ?

Therefore;

T2= \frac{P2T1}{P1}

T2= \frac{(2)(298)}{0.8}

= 745 K

Therefore, the temperature can be raised up to 745 kelvin without bursting vessel.

8 0
3 years ago
Read 2 more answers
Consider the aldol-dehydration reaction. Draw the two possible products of the reaction between benzaldehyde and methylethylketo
Dafna1 [17]

Solution :

An $\text{aldol condensation}$ reaction is a type of \text{condensation reaction} in organic chemistry where the enol or an enolate ion reacts with the carbonyl compound and forms a $\beta$-hydroxyaldehyde or a $\beta$-hydroxyketone, and then followed by a dehydration to give conjugated enone.  

Benzaldehyde reacts with methylketone and forms two products:  

5 0
3 years ago
Heat is added to a 1.0-kg block of ice at OC. Determine if the process is
Tatiana [17]

Answer:

endothermic

Explanation:

Heat is added to make the process possible.

5 0
3 years ago
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