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tamaranim1 [39]
3 years ago
14

400.00 in scientific notation

Chemistry
1 answer:
Damm [24]3 years ago
7 0
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the <span>10</span>. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.<span>
Answer : 4×<span>10^2</span></span>
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What is the Chemical formula for Hexacarbon octaphosphide?
bagirrra123 [75]

Answer:C6P8

Explanation:

8 0
3 years ago
Which of the following tool components is unlikely to present a hazard
nydimaria [60]

Gloves is the tool component which will unlikely present a hazard in this scenario.

<h3>What is Hazard?</h3>

This is referred to as potential source of harm when performing various types of activities.

Gloves will unlikely cause harm as it is used to prevent the risk of electric shock when handling electrical devices which is why it is the most appropriate choice.

Read more about Hazard here brainly.com/question/7310653

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6 0
2 years ago
Could I please get some help on this?
Deffense [45]

Answer:  0.0008636 kilometers

Explanation:

6 0
3 years ago
Analysis of a rock sample shows that it contains 6.25% of its original uranium-235. How old is the rock? How do you know?
nadya68 [22]

Answer:

2.82\cdot 10^9 y

Explanation:

A radioactive isotope is an isotope that undergoes nuclear decay, breaking apart into a smaller nucleus and emitting radiation during the process.

The half-life of an isotope is the amount of time it takes for a certain quantity of a radioactive isotope to halve.

For a radioactive isotope, the amount of substance left after a certain time t is:

m(t)=m_0 (\frac{1}{2})^{\frac{t}{\tau}} (1)

where

m_0 is the mass of the substance at time t = 0

m(t) is the mass of the substance at time t

\tau is the half-life of the isotope

In this problem, the isotope is uranium-235, which has a half-life of

\tau=7.04\cdot 10^8 y

We also know that the amount of uranium left in the rock sample is 6.25% of its original value, this means that

\frac{m(t)}{m_0}=\frac{6.25}{100}

Substituting into (1) and solving for t, we can find how much time has passed:

t=-\tau log_2 (\frac{m(t)}{m_0})=-(7.04\cdot 10^8) log_2 (\frac{6.25}{100})=2.82\cdot 10^9 y

5 0
4 years ago
Assume that the batteries in a flashlight are rechargeable. What energy conversion would have to take place in order to recharge
zaharov [31]

Electrical to chemical energy

Explanation:

If the batteries in a flashlight are rechargeable, the energy conversion that would take place to recharge the battery is from electrical to chemical energy.

  • A battery is an electrochemical cell in which chemical reactions produces electrical currents.
  • This is a typical energy conversion from chemical to electrical energy.
  • When such batteries are to be recharged, the revere process is followed.
  • Electrical energy are used to drive chemical reactions.
  • This in turn makes the battery recharged and on its own, it can further chemical reactions to produce electrical energy.
  • During charging, the potential of the battery increases.

learn more:

Electrochemical reactions brainly.com/question/12174850

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7 0
4 years ago
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