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
raketka [301]
1 year ago
15

Round off .00042557 to three significant digits

Chemistry
1 answer:
Mariulka [41]1 year ago
7 0

Round off .00042557 to three significant digits is = 0.000426

<h3>What is round of value ?</h3>
  • If 5, 6, 7, 8, or 9 come after the number you are rounding, round it up. For instance, 40 is the result of rounding 38 to the nearest ten.
  • If the numbers 0, 1, 2, 3, or 4 come after the number, round it down. If 33 is rounded to the nearest ten, it becomes 30.
  • To estimate a certain number in a context, rounding is a process. Look at the next digit in the correct position to determine how to round a number; if it is less than 5, round down, and if it is 5 or more, round up.

Given

The digit of 00042557

Three significant digits is 0.000426

To learn more about round of value refer to :

brainly.com/question/25297296

#SPJ10

You might be interested in
I need help of these two questions please
STatiana [176]

Answer:

Below

Explanation:

The balanced equation for h202 = h20 + 02 is:

2H2O2 = 2H20 + O2

The coefficients would be 2  

The balanced equation for Na + I2 = NaI is:

2Na + I2 = 2NAI

The coefficients would be 2

Hope this helps! :)

8 0
3 years ago
If the temperature of gas is held constant describe the relationship between a gas volume of a gas pressure?
love history [14]
This law states that the volume and temperature of a gas have a direct relationship: As temperature increases, volume increases, when pressure is held constant. Heating a gas increases the kinetic energy of the particles, causing the gas to expand.
6 0
4 years ago
C. A paramecium is a single-celled organism that lives in ponds. It travels at a rate of 2,000 micrometers per second. What is t
ruslelena [56]

Answer:

7.2 meters per hour

Explanation:

It is given that,

The speed of a paramecium is 2,000 micrometers per second.

We need to find the speed of the paramecium in meters per hour.

We know that,

1\ \mu m=10^{-6}\ m

and

1 hour = 3600 seconds

v=2000\ \dfrac{\mu m}{s}\\\\=2000\times \dfrac{10^{-6}\ m}{(\dfrac{1}{3600})\ s}\\\\=7.2\ \text{meters/hour}

Hence, the speed of the paramecium is 7.2 meters per hour.

4 0
3 years ago
A rock has a mass of 15 grams and a volume of 5 cm3. What is the density of the rock?
xz_007 [3.2K]
The answers is 3.0 g/cm^3

Explanation:
You use the formula
Density= mass/volume
When they give you mass and volume.

The mass is 15 grams and the volume would be 5 cm^3.

So the density would be
15/5= 3
3 0
3 years ago
You must answer all questions to get credit for this assignment. Use the notes above and/or the textbook to help you find the an
Allisa [31]

Explanation:

(1).  It is known that in a reaction equation, reactants are placed or written on left hand side and products are written on the right hand side.

For example, N_{2} + 3H_{2} \rightarrow 2NH_{3}

Hence, in a reaction equation you start with the reactants and end up with the products.

(2).  The number of atoms in a reaction will remain the same because according to the law of conservation of mass, mass of reactants will be equal to the mass of products.

Therefore, number of atoms on the reactant side will be equal to the number of atoms on product side.

7 0
3 years ago
Other questions:
  • Lead(II) sulfide, PbS, reacts with oxygen gas to produce lead(II)oxide and dioxide. If 0.500 moles of O2 were consumed using thi
    13·1 answer
  • What is the difference between a dwarf planet and an asteroid?
    12·2 answers
  • In the compound sodium methoxide (naoch3), there is ________ bonding
    8·1 answer
  • An astronomy research team has been studying the atmosphere of a moon orbiting a newly discovered exoplanet. The team has determ
    15·1 answer
  • When someone’s immune system overreacts to something harmless it’s called:
    13·2 answers
  • The balanced equation for a hypothetical reaction is a 5b 6c → 3d 3e. what is the rate law for this reaction?
    13·2 answers
  • The equilibrium constant, Kc, for the following reaction is 77.5 at 600 K. CO(g) Cl2(g) COCl2(g) Calculate the equilibrium conce
    11·1 answer
  • PLS HELPPP How many moles of oxygen atoms (not molecules) are present in 6.41×1025 molecules of dinitrogen pentoxide (N2O5)? 1.
    14·1 answer
  • At a fixed pressure, if the temperature is doubled, the volume of a gas will be
    15·1 answer
  • What does Na2S formula mean?; What is the two in Na2S called?; How do you write Na2S?; What state of matter is Na2S?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!