1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena-14-01-66 [18.8K]
4 years ago
9

The first nucleus of an atom was shown as

Chemistry
1 answer:
shtirl [24]4 years ago
3 0
A mass of protons and neutrons. Hope this helps. Abby (I'm really awesome)
You might be interested in
What does the hydrolysis of atp do in a ca2+ pump or na+/k+ pump?
34kurt
Hydrolysis of ATP provides the energy that is needed to drive the electrolytes pumps. Energy is needed for these pumps to function because they are active form of transportation which the body use to move electrolytes from one point in the body to the other.
6 0
4 years ago
The table below shows a list of radioisotopes and their half-lives.
omeli [17]

Answer: D: plutonium-239

Explanation: Got it right on the quiz

6 0
3 years ago
Read 2 more answers
Determine the amount of heat energy in joules required to raise the temperature of 7.40g of water from 29.0OC to 46.0 OC.
valina [46]

Answer: The amount of heat energy in joules required to raise the temperature is 526 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed = ?

m= mass of substance = 7.40 g

c = specific heat capacity = 4.184J/g^0C

Initial temperature of the water = T_i = 29.0°C

Final temperature of the water = T_f  = 46.0°C

Change in temperature ,\Delta T=T_f-T_i=(46.0-29.0)^0C=17.0^0C

Putting in the values, we get:

Q=7.40g\times 4.184J/g^0C\times 17.0^0C

Q=526J

The amount of heat energy in joules required to raise the temperature is 526 Joules

4 0
3 years ago
Fe + CuCl2 → FeCl2 + Cu
inna [77]

Answer:

the type is single replacement

5 0
3 years ago
Discuss why it is not necessary to know exactly how much salt was added to the water in making the salt solution to just float t
valina [46]

Answer and Explanation:

It is not necessary to know the amount of salt in the aqua, because we know that the presence of salt in the water will increase its density.

In this case, salt increases the mass of the water, without increasing the volume of water. as the egg will not change in volume or water, we know that the density of the egg will be constant, while the change in the mass of the water with the addition of salt, will change the density of the water which will increase progressively until it becomes denser than the egg and, consequently, it will not let the egg sink.

5 0
3 years ago
Other questions:
  • The half-life of carbon-14 is 5,715 years. After 29,000 years (5 half-lives) have elapsed, how much carbon-14 remains in a sampl
    14·1 answer
  • How many atom of cd are in 3.00g of cadmium
    8·2 answers
  • Select true or false: substitute natural gas can be synthesized by passing carbon monoxide and hydrogen over ni or co at 400°c.
    6·1 answer
  • Please help :(<br> I just need the bottom true or false part
    12·1 answer
  • How do matter and energy move through an ecosystem?
    8·2 answers
  • What is the purpose of the scientific method?
    7·2 answers
  • Use the equation for the combustion of butane: 2 C,H, + 13 0,8 CO, +10 H,O 4. If you had 99.08g of butane react, how many grams
    6·1 answer
  • Which sources would preserve the soft tissues of an early mammal? Check all that apply.
    5·2 answers
  • The concentration of either the H+ ion or the OH- ion is given for four aqueous solutions at 298 K. For each solution, calculate
    15·1 answer
  • Fatty acids are ________ Group of answer choices composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio. composed of carbon,
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!