What examples does
- Making Materials
- Moving Materials
- Removing Waste

Answers

Answer 1

Answer:

Answer:

You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled

Moving Materials include aluminum foil tape, shipping tape, box tape and duct tape. Moving labels take the guesswork out of the moving process.

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What is the mass in grams of each elemental sample?A. 6.65 mol W B. 0.588 mol Ba C. 68.4 mil Xe D. 1.57 mol S

What types of atoms are shown in a skeletal model of an organic molecule?A. Atoms of every element except carbon
B. Atoms of every element except hydrogen
C. Atoms of every element
D. Atoms of every element except carbon and hydrogen

Answers

Answer:

Atoms of every element are shown in a skeletal model of an organic molecule.

Explanation:

Skeletal model of an organic molecule consists of various skeletal atoms that are used in making up of the molecule. Various conventions of hydrogen and carbon atoms are employed in it. The molecules bonding and certain representation of molecular geometry are shown in the structural formula.

Use of skeletal formula is ubiquitous in organic chemistry. Thus, in organic chemistry atoms of every element are shown in the skeletal model of an organic molecule

Metalloids are border of metals and non metals why

Answers

Answer:

Metalloids are called the border of metals and non metals.

Explanation:

They show some properties of metals and some properties of non metals.

Answer:

Metalloids exhibit metal and non-metal properties.

Explanation:

Some metals such as Boron and silicons and not necessarily a metal, nor are they a gas.

What element is found in liver and is needed to prevent anemia or tired blood.

Answers

The element found in the liver that helps prevent anemia is iron.

Iron is an essential element for blood production. Close to 70% of the body's iron is found in the red blood cells. In the red blood cells it is a vital ingredient of hemoglobin, the red pigment that gives blood its red color. In the muscle cells, iron is found as myoglobin.

Iron is stored mostly in the liver as ferritin or hemosiderin.

When iron stores are finished or exhausted, the condition is called iron depletion. When the shortage of iron is severe, it results in a condition known as iron deficiency anemia whereby the red blood cells do not have enough hemoglobin.

C. If 62.9 g of lead (II) chloride is produced, how many grams of lead (II) nitrate werereacted?

Answers

Answer:

Mass = 76.176 g

Explanation:

Given data:

Mass of lead(II) chloride produced = 62.9 g

Mass of lead(II) nitrate used = ?

Solution:

Chemical equation:

Pb(NO₃)₂ + 2HCl → PbCl₂ + 2HNO₃

Number of moles of lead(II) chloride:

Number of moles = mass/molar mass

Number of moles = 62.9 g/ 278.1 g/mol

Number of moles = 0.23 mol

Now we will compare the moles of lead(II) chloride with Pb(NO₃)₂ from balance chemical equation:

PbCl₂ : Pb(NO₃)₂

1 : 1

0.23 : 0.23

Mass of Pb(NO₃)₂:

Mass = number of moles × molar mass

Mass = 0.23 mol × 331.2 g/mol

Mass = 76.176 g

Where is the moon in its orbit at the time of a solar eclipse?

Answers

The moon is exactly on the line between the sun and the Earth, and the tip of its shadow falls somewhere on the Earth. People at that exact place can see the sun for a few minutes.

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