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iragen [17]
4 years ago
7

Which of the following are physical properties of matter?

Chemistry
1 answer:
prisoha [69]4 years ago
8 0
The physical properties of matter are going to be appearance,texture, density. hope that helped
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Calculate the number of atoms in 2.0g of hydrogen atoms?
Jobisdone [24]
First you calculate how many moles there are in 2.0 grams of hydrogen (H2) atoms.
Hydrogen has a relative atomic mass (RAM) of 1 g/mol, but there are 2 hydrogen atoms: 1 x 2 = 2 g/mol

To work out how many moles there are,
use the formula: n(moles) = mass ÷ molar mass
n(moles) = 2 grams ÷ 2 g/mol = 1 mol

Then use Avogadro's Constant : 6.023 x 10^23
= 1 x 6.023 x 10^23
= 6.023 x 10^23

Final step is to multiply it by the number of atoms, in this case there are 2.
= 6.023 x 10^23 x 2
= 12.046 x 10^23
= 1.205 x 10^24

that ^ should be your final answer

have a great day :)

4 0
3 years ago
Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.
Sphinxa [80]
ANDESITE is a fine grained rock that formed when magma irrupt it onto the surface and crystallized quickly ANDESITE & DIORITE have a composition that is intermediate between basalt.This is because their parent magmas formed from the PARTIAL melting of a BASALTIC oceanic plate.
7 0
3 years ago
Three-quarters of the elements are..
Dennis_Churaev [7]

Answer:

metals

Explanation:

Approximately three-quarters of all known chemical elements are metals. The most abundant varieties in the Earth's crust are aluminum,... Gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6, of the periodic table.

8 0
3 years ago
The plant chemical which absorbs sunlight and helps make cell food is:
nadya68 [22]

Answer:

photosynthesis

Explanation:

The process by which land plants produce their own food using sunlight and carbon dioxide is known as photosynthesis (Figure 1). While carbon dioxide is absorbed by the leaves, the sunlight is captured by a chemical molecule in the plant, called chlorophyll (Chl).

8 0
3 years ago
Read 2 more answers
A scientist conduncted one trial of experiment and got unexpected results . How can the scientiest increase confidence in the re
kakasveta [241]

Answer:

by repeating the experiment several times

Explanation:

A scientist conducted one trial of an experiment and got unexpected results. Therefore, he should repeat his experiment and see if he is getting the same result again or not. If the result is again the same and does not matches his expectations then he should discuss the results with other scientist. If the result is different, then he should check for the cause of error.

6 0
3 years ago
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