answer.
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
kotykmax [81]
1 year ago
7

How many mg does a 643 kg sample contain?

Chemistry
1 answer:
MariettaO [177]1 year ago
7 0

Answer:

6.43x19^8mg

Explanation:

Hello,

In this case, this unit conversion is performed by knowing that 1 kg of mass contains 1000 g and 1 g contains 1000 mg, therefore, the result is:

643kg*\frac{1000g}{1kg} *\frac{1000mg}{1g}\\ \\=6.43x10^8mg

Regards.

You might be interested in
Jeff has 10 grams of water and 10 grams of vegetable oil in separate containers. Both liquids have a temperature of 24°C. Jeff h
Anna11 [10]
I think the answer would be that vegetable oil is a better conductor of heat than water.
8 0
2 years ago
Read 2 more answers
A chef makes a marinade by mixing red pepper flakes, dried onion flakes, and a ground ginger with soy sauce. He sets the marinad
Alisiya [41]

Answer:

Suspension

Explanation:

This mixture is a simple suspension.

A suspension is a mixture of small insoluble particles of a solid in a liquid or gas. Here, it is insoluble particles in liquid.

  • Suspensions are settle on standing this is why they have to be mixed again.
  • The particles do not pass through ordinary filter paper.
  • They are usually cloudy and have an opaque color.
  • The marinade is simply a suspension.
  • It is not a solution because they do not settle on standing.
  • Also, colloids do not settle on standing.
3 0
2 years ago
Read 2 more answers
Consider the reaction. X ( g ) + Y ( g ) − ⇀ ↽ − Z ( g ) K p = 1.00 at 300 K In which direction will the net reaction proceed fo
marta [7]

Answer:

Explanation:

We have in this question the equilibrium

X ( g ) + Y ( g ) ⇆  Z ( g )

With the equilibrium contant Kp = pZ/(pX x pY)

The moment we change the concentration of Y, we are changing effectively the partial pressure of Y since pressure and concentration are directly proportional

pV = nRT ⇒ p = nRT/V and n/V is molarity.

Therefore we can calculate the reaction quotient Q

Qp = pZ/(pX x pY) = 1/ 1  x 0.5 atm = 2

Since Qp is greater than Kp the system proceeds from right to left.

We could also arrive to the same conclusion by applying LeChatelier´s principle which states that any disturbance in the equilibrium, the system will react in such a way to counteract the change to restore the equilibrium. Therefore, by having reduced the pressure of Y the system will react favoring the reactants side increasing some of the y pressure until restoring the equilibrium Kp = 1.

4 0
2 years ago
Which substance can be described as cations bonded together by mobile electrons?a. S8(s)b. Ag(s)c. SiO2(s)d. KCl(s)e. Kr(l)
Alex73 [517]

Answer:

Ag(s)

Explanation:

Metal atoms are held together by the metallic bond. The metallic bond consists of cations held together by a sea of mobile electrons.

Thus, the crystal of Ag(s) is composed of silver ions held together by a sea of mobile electrons. Electrostatic forces of attraction holds the crystal together.

5 0
1 year ago
You are experimenting on the effect of temperature on the rate of reaction between hydrochloric acid (HCl) and potassium iodide
erica [24]

Answer is "B - 700,000".<span>

<span>Kinetic energy of a single particle (atom or molecule)<span> is directly proportional to its temperature according to the following equation.</span></span>
           KE = (3kT)/2

<span>Where </span>KE<span> is the kinetic energy of a single atom/molecule (</span>J<span>), </span>k<span> is the Boltzmann constant (</span>1.381 × 10</span>⁻²³ J/K<span>) and </span>T<span> is the temperature (</span>K<span>) </span><span>

When temperature increases, then the kinetic energy increases.

<span>If kinetic energy of atoms increases, then there will be more motions which create many collisions.</span></span>

4 0
2 years ago
Read 2 more answers
Other questions:
  • How many g i2 should be added to 750g ccl4 to prepare a 0.200m solution?
    10·2 answers
  • In which 0.01 M solution is phenolphthalein pink?
    13·1 answer
  • Calculate the amount (in grams) of kcl present in 75.0 ml of 2.10 m kcl
    5·1 answer
  • What mass of lif is contained in 18.66 g of a 20.0% by mass solution of lif in water?
    10·1 answer
  • A student assistant is cleaning up after a chemistry laboratory exercise and finds three one-liter bottles containing alcohol so
    15·1 answer
  • Scientists tracking a flock of ducks found that, on average, the ducks flew 740 km south in 12 hours. What were the speed and ve
    7·1 answer
  • 500 mL of He at 300 K is heated to 450 K. Find V2
    6·1 answer
  • Suppose now that you wanted to determine the density of a small crystal to confirm that it is silicon. From the literature, you
    9·1 answer
  • Morant Bay is 33 km south of Port Antonio a pigeon can fly at a speed of 1.2 m s what is the displacement of morant bay from Por
    11·1 answer
  • Fire a single electron towards the hydrogen atom. Describe what happens in a step by step fashion. [N.B. - It may be helpful to
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!