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SVEN [57.7K]
3 years ago
11

a microscope is a labolatory tool that is used to__________ this allowed scientists to ____________ we cannot see using our nake

d eyes such as _____ protists ______and___________ the main parts of a microscope that magnifies are the __________ and the ___________. the__________ serves as the light source. in order to see he specimen clearly the stage needs to be adjusted at the right distance from the lens. this is done using the __________ and _______. other parts of the microscope such as the______. ______ and _________ serves as a primary support for device
Chemistry
1 answer:
Whitepunk [10]3 years ago
8 0

Answer:

See the answer below

Explanation:

A microscope is a laboratory tool that is used to <u>magnify the image of objects</u> This allowed scientists to <u>study tiny organisms that cannot be seen with an ordinary eye</u>. We cannot see some organisms using our naked eyes, such as <u>bacteria,</u> protists, <u>viruses,</u> and <u>microscopic fungi.</u> The main parts of a microscope that magnifies are the <u>ocular</u> and the <u>objective lenses</u>. the <u>lamp </u>serves as the light source. In order to see the specimen clearly the stage needs to be adjusted at the right distance from the lens. this is done using the <u>coarse</u> and <u>the fine adjustment knobs</u>. other parts of the microscope such as the <u>base</u> and <u>the arm</u> serve as primary support for the device.

The microscope is primarily designed to magnify the image of objects and, thus, enables one to see objects that cannot ordinarily be seen with the naked eyes. It magnifies objects using a system of lenses in the ocular and the eyepiece. Microscopic organisms such as protists, bacteria, viruses, microscopic fungi and algae can be seen using the microscope. Slides of objects are prepared and placed on the stage of the microscope and the coarse/fine adjustment knobs used to adjust the stage in order to bring the image on the slide into focus through the ocular. A lamp at the base provides the light source for the light microscope while other parts such as the arm, the head, and the base provide supportive functions for the microscope,

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What mass of aluminum sulfate is required to precipitate all of the Ba?? out of 45.0 mL of 0.548 M barium nitrate solution? 3 Ba
Verizon [17]

Answer:

2.82 g

Explanation:

Step 1: Write the balanced precipitation reaction

3 Ba(NO₃)₂ (aq) + Al₂(SO₄)₃ (aq) ⇒ 3 BaSO₄(s) + 2 Al(NO₃)₃(aq)

Step 2: Calculate the reacting moles of Ba(NO₃)₂

45.0 mL (0.0450 L) of 0.548 M Ba(NO₃)₂ react.

0.0450 L × 0.548 mol/L = 0.0247 mol

Step 3: Calculate the moles of Al₂(SO₄)₃ that react with 0.0247 moles of Ba(NO₃)₂

The molar ratio of Ba(NO₃)₂ to Al₂(SO₄)₃ is 3:1. The reacting moles of Al₂(SO₄)₃ are 1/3 × 0.0247 mol = 8.23 × 10⁻³ mol

Step 4: Calculate the mass corresponding to 8.23 × 10⁻³ moles of Al₂(SO₄)₃

The molar mass of Al₂(SO₄)₃ is 342.2 g/mol.

8.23 × 10⁻³ mol × 342.2 g/mol = 2.82 g

5 0
3 years ago
The density of silver is 10.5 g/cm3. what would be the mass (in grams) of a piece of silver that occupies a volume of 23.6 cm3?
Keith_Richards [23]
Hey there : !

density = 10.5 g/cm³

volume = 23.6 cm³

therefore:

D = m / V

10.5 = m / 23.6

m = 10.5 * 23.6

m = 247.8 g

hope this helps!
6 0
3 years ago
Read 2 more answers
Write the 1 g equivalents using the following prefixes: (a) mega−, (b) kilo−, (c) deci−, (d) centi−, (e) milli−, (f) micro−, (g)
dem82 [27]

<u>Explanation:</u>

Unit is defined as the quantity that is used as a standard for measurement.

S.I. unit of mass of kilograms. Other units in which mass of a substance can be measured are grams, milligrams, etc...

All these units are inter convertible.

  • <u>For a:</u> Mega-

The conversion factor used is:

1g=10^{-6}Mg

  • <u>For b:</u> kilo-

The conversion factor used is:

1g=10^{-3}kg

  • <u>For c:</u> deci-

The conversion factor used is:

1g=10dg

  • <u>For d:</u> centi-

The conversion factor used is:

1g=10^{3}cg

  • <u>For e:</u> milli-

The conversion factor used is:

1g=10^3mg

  • <u>For f:</u> micro-

The conversion factor used is:

1g=10^6\mu g

  • <u>For g:</u> nano-

The conversion factor used is:

1g=10^9ng

  • <u>For h:</u> pico-

The conversion factor used is:

1g=10^{12}pg

8 0
3 years ago
Write a poem about one of the elements (preferably Neon or Helium):
stepan [7]

Answer:

hydrogen is the chemical element with the symbol H and atomic number 1. with the standard atomic

8 0
3 years ago
gold is heavier than aluminium if we put a 100 gram biscuit of gold in water taken in a measuring cylinder or we put a 100 gram
kati45 [8]

Answer:

The level of the water will be higher for 100g Al because occupy more space than gold.

Explanation:

To understand this problem, we must know Archimedes' principle:

"A body that is submerged in a fluid produce a bouyant force equal to the weight of the fluid that the body displaces". The volume of the body is equal to the volume displaced in the liquid.

Now, as gold is heavier than aluminium, 100g of Al have more volume than 100g of gold, than means:

<h3>The level of the water will be higher for 100g Al because occupy more space than gold.</h3>

4 0
4 years ago
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