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ololo11 [35]
3 years ago
10

Make a generalization about the importance of tools to science.

Chemistry
2 answers:
inessss [21]3 years ago
6 0
Tools are important of science, because of how and when they are used. we use them for many things especially experiments.
nasty-shy [4]3 years ago
4 0
Scientists use special tools to do their work. They gather data, or information, as they seek to learn about the world. In order to solve problems they must record data that is accurate and organized. This is an important part of the scientific method.
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Express the following numbers as standard form:<br> a) 1.52 x 10^-2<br> b) 7.78 x 10^-8
Vikentia [17]

Answer:

0.0152

0.0000000778

Explanation:

You just need to more the decimal as many times as the exponent to the to the left if it is negativa and to the right if it is positive.

4 0
3 years ago
Pb(OH)Cl, one of the lead compounds used in ancient Egyptian cosmetics, was prepared from PbO according to the following recipe:
sladkih [1.3K]

Answer:

8.59 g

2.25 g

Explanation:

According to the given situation the calculation of grams of PbO and grams of NaCL is shown below:-

Moles of Pb(OH)CL is

= \frac{Mass}{Molar\ mass}

= \frac{10.0 g}{259.65g / mol}

= 0.0385 mol

Mass of PbO needed is

= 0.385mol Pb(OH) Cl\times \frac{1 mol PbO}{1molpb (OH) cl} \times \frac{223.2g PbO}{1mol PbO}

After solving the above equation we will get

= 8.59 g

Mass of NaCL needed is

= \frac{1mol\ NaCl}{1molPb\ (OH)Cl} \times \frac{58.45NaCl}{1mol NaCl}

After solving the above equation we will get

= 2.25 g

Therefore we have applied the above formula.

7 0
3 years ago
12 POINTS!! Which step would help a student find the molecular formula of a compound from the empirical formula?
pishuonlain [190]
Is the C because the mass in the compound is correct
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Do acids have ph above 7?
nata0808 [166]
No acids have a ph of less than 7 our rain is around a six. dilated water is a 7 and any thing above a 7 is a base
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4 years ago
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What is a tube like structure of neurons
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<span>It is known as the axon</span>
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