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
steposvetlana [31]
3 years ago
7

The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original

mass of potassium 40. The approximate age of the rock is _____ billion years.
Chemistry
1 answer:
vodomira [7]3 years ago
4 0

Answer:

2.5 billion years

Explanation:

You might be interested in
2.00 L of a gas is collected at 25.0°C and 745.0 mmHg. What is the volume at 760.0 mmHg
Leviafan [203]

1.7960L

Explanation:

the mass of the gas is constant in both instances

pv/T=constant(according to pv=nRT)

745mmHg*2L/298K=760mmHg*v/273K

v=1.7960L

5 0
3 years ago
a piece of candy is burned in a calorimeter raising up the tempature of 500g of water from 21 C to 25 C water has a specific hea
OverLord2011 [107]
   The energy  that was  released   by the candy  is calculates using the below formula
Q=Mc delta T

Q= heat energy
m= mass (500g)
C= specific heat  capacity) = 4.18 j/g/c
 delta t =change in temperature = 25- 21 = 4 c

Q=  500 g  x 4.18 j/g/c x 4c = 8360  j

3 0
3 years ago
How does the displacement moved affect the amount of work done?
Sholpan [36]

The displacement affect the amount of work done by the fact that more displacement implies more work.

Option B

<u>Explanation:</u>

Work can be defined as the "measure of energy transfer" that occurs when an object is moved over a distance by an external force which is applied in the "direction of the displacement".

Work can be formulated as,

W = (F \times s)\  N / m \\ \\Work = ( Force \times Displacement )\   Newton/meter

From the above-mentioned formula, we can infer that Work is directly proportional to the displacement of the object.Therefore, more the work is more will be its displacement.

6 0
3 years ago
If a test yields consistent results every time it is used, it has a high degree of...
Marysya12 [62]

Answer:Reliability

Explanation:

Reliability of a test refers to how consistently a test measures a characteristic under the same conditions.

Reliability can be defined as the degree of consistency of which a chemical test gives a similar result. measure. A test is said to be highly reliable when it gives the same repeated result under the same conditions of measure.

But when a test gives different results under the same condition of measure it has a low reliability.

Hence, If a test yields consistent results every time it is used, it has a high degree of reliability.

4 0
3 years ago
In a chemical reaction, the products are
Blizzard [7]

whatever u r mixing together will indicated what the reaction or the product will be

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which solid is the most suitable in the space elevator cable
    7·1 answer
  • Symbiosis is an interaction between two different organisms living in close physical association. The relationship between fleas
    10·1 answer
  • What is a polar bond
    9·1 answer
  • Why was it possible to neutralize HCI using NaOH?
    6·1 answer
  • if two atoms share electrons how does knowledge of the electronegativity of each atom help determine if the bond will be polar
    14·2 answers
  • A certain amount of gas is trapped in a nonrigid container at atmospheric pressure. If the container is cooled and the gas in th
    5·1 answer
  • _______ is a physical property
    10·2 answers
  • What is a rule for determining the mass number of an atom or ion?
    10·1 answer
  • 4.Which scientist described the electrons as traveling in certain orbits or energy levels?
    6·1 answer
  • Convert 4.92 L of hydrogen at STP to moles.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!