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uranmaximum [27]
2 years ago
8

Which of the following instrument would you use to see a plant cell?

Chemistry
2 answers:
olya-2409 [2.1K]2 years ago
7 0
B) is use too see plant cells
Gemiola [76]2 years ago
3 0
B . microscope
this is the answer .
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Which scientist developed the 1st model of the atom that showed the structure of the inside of an atom?
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C. Rutherford (1911)
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Which of the following measurements is equal to 150dL
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A metal X from two oxide A and B .3.oogm of A and B contain 0.72 and 1.16g of oxygen respectively.calculate the maases of metal
devlian [24]

Answer:

Explanation:

Firstly, we have to determine the mass of metal X. We can do that by interpreting the first and second statement mathematically.

Metal X can form 2 oxides (A and B).

A + B = 3g

The mass of oxygen in A is 0.72g and the mass of oxygen in B is 1.16g.

The mass of metal X in the two oxides will be the same because it's the same metal.

Thus, we represent the mass of the metal in the two oxides as 2X.

2X + 0.72 + 1.16 = 3

2X + 1.88 = 3

2X = 3 - 1.88

2X = 1.12

X = 0.56

<u>Thus, 0.56 g of the metal combines with 0.72g of oxygen in A and 1.16 g of oxygen in B.</u>

Thus, mass of metal (X) in 1g of oxygen in A is

0.56g ⇒ 0.72g

X ⇒ 1

X = 1 × 0.56/0.72

X = 0.78 g

Hence, 0.78g of the metal will combine with 1g of oxygen for A

Also, mass of metal (X) in 1g of oxygen in B is

0.56g ⇒ 1.16g

X ⇒ 1g

X = 1×0.56/1.16

X = 0.48 g

Thus, 0.48g of the metal will combine with 1g of oxygen for B

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2 years ago
When an atom gains electrons, it is called a (an) _____ and has a ______ charge.
jolli1 [7]

Answer:

When an atom gains/loses an electron, the atom becomes charged, and is called an ion. Gaining an electron results in a negative charge, so the atom is an anion

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Which of these types of changes is a physical change?
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Answer:

answer is c

Explanation: cause there breaking it

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