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Hatshy [7]
2 years ago
15

9

Chemistry
1 answer:
marishachu [46]2 years ago
8 0

Answer:

B. as a food preservative in the manufacture of detergents

.........

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Light, heat, and ultraviolet radiation are types of ___ produces by stars
Charra [1.4K]

Answer:

energy

Explanation:

Those are all forms of energy

6 0
3 years ago
What do cyanobacteria use to produce energy and by what process do they produce energy
andrezito [222]
As they contain, green pigement they can perform "Photosynthesis" and obtains energy from that process

Hope this helps!
7 0
2 years ago
One mole of water weights?
Gemiola [76]

Answer:

c 18.0ml

Explanation:

The average mass of one H2O molecule is 18.02 amu. The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of one mole of H2O is 18.02 grams. This is stated: the molar mass of water is 18.02 g/mol.

8 0
2 years ago
What element has 80 protons, 81 neutrons, 79 electrons?
Mariana [72]

Answer:

The element will be ^{161}_{80}X

Explanation:

Given that,

Number of proton = 80

Number of neutron = 81

Number of electron = 79

We know that,

The atomic number is equal to the number of proton.

So, the atomic number is 80.

According to atomic number,

The element will be mercury.

We need to calculate the atomic mass

Using formula of atomic mass

atomic\ mass=atomic\ number+number\ of\ neutron

Put the value into the formula

atomic\ mass=80+81

atomic\ mass=161

We need to find the element

Using atomic mass and atomic number

atomic\ mass\ number A=161

atomic\ number Z=80

So, the element will be

^{A}_{Z}X

Put the value of A and Z

Hence, The element will be ^{161}_{80}X

5 0
3 years ago
For a science project, Janet performs four experiments that are supposed to show a chemical reaction. She displays her results i
Lina20 [59]
A. experiment 1 i believe its the best answer

7 0
3 years ago
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