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SashulF [63]
3 years ago
13

As a clinical chemist in charge of the testing of blood samples. You are required to mix a solution of sodium chloride with wate

r in the ratio of 2:5. =2:5 2/7 of whole solution chloride 5/7 of whole solution is water 780ml = 2/7 1/7 = 390 ml 5/7 = 1950 Total solution =2730ml 780ml = sodium chloride 1950ml = water 780:1950ml.
How do I put that in standard form and to an appropriate number of significant figures?
Physics
1 answer:
Natalka [10]3 years ago
6 0
<span>7.8x102 x 1.95x10<span>3 this is the answer mate
</span></span>
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If a bag holds 70.874 grams ,how many itemsare in the bag?​
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Answer:

The answer is not able to be solved, because we dont know what objects are in it, and how heavy they are. More information please!

Explanation:

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Can u help me with C
Vladimir79 [104]
I believe it would be 2m/s.
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Which statement correctly describes why a compound is a pure substance?
ad-work [718]

Explanation:

A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.

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3 years ago
If a substance has a density of 2.7g/cm3 and a mass of 86.4g, what is its volume?
Gennadij [26K]

Answer:

32cm³

Explanation:

Given parameters:

  Density of substance  = 2.7g/cm³

   Mass of substance  = 86.4g

Unknown:

Volume of substance  = ?

Solution:

Density is the mass per unit volume of a substance.

    Density  = \frac{mass}{volume}

Since the unknown is volume we solve for it;

   mass  = density x volume

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7 0
3 years ago
We know that the Moon revolves around Earth during a period of 27.3 days. The average distance from the center of Earth to the c
PtichkaEL [24]

Answer:

Explanation:

This is a circular motion questions

Where the oscillation is 27.3days

Given radius (r)=3.84×10^8m

Circular motion formulas

V=wr

a=v^2/r

w=θ/t

Now, the moon makes one complete oscillation for 27.3days

Then, one complete oscillation is 2πrad

Therefore, θ=2πrad

Then 27.3 days to secs

1day=24hrs

1hrs=3600sec

Therefore, 1day=24×3600secs

Now, 27.3days= 27.3×24×3600=2358720secs

t=2358720secs

Now,

w=θ/t

w=2π/2358720 rad/secs

Now,

V=wr

V=2π/2358720 ×3.84×10^8

V=1022.9m/s

Then,

a=v^2/r

a=1022.9^2/×3.84×10^8

a=0.0027m/s^2

3 0
3 years ago
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