Ask question

Ask question

All categories

aleksandr82 [10.1K]

3 years ago

9

An object was measured by a worker as 14.6 cm long, however, the manufacturer specifications list the length of the object at 14

.4 cm. What is the percent error in the workers measurement

1 answer:

Nitella [24]3 years ago

4 0

Answer:

Explanation:Answer - 0.73%

14.6 .2

=

100 x

(Above is proportions I used to get the answer)

x = 0.73% which is the answer.

You might be interested in

Write the formula for Zn+2 (SO4)-2

Pie

Answer:

Zn2 + SO4 = Zn2(SO4)2

Explanation:

4 0

3 years ago

Which part of a chemical formula indicates the number of copies of molecules or compounds? A. plus signs B. subscripts C. coeffi

nadya68 [22]

I think it is C. coefficients but I don't know what subscripts are

3 0

3 years ago

State the Alfabau's principle in atomic chemistry

Jlenok [28]

According to the Aufbau principle, , electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels (e.g., 1s before 2s).

7 0

3 years ago

A chemistry student needs 10.00 g of isopropenylbenzene for an experiment. He has available 120. g of a 42.7% w/w solution of is

Vanyuwa [196]

<u>Answer:</u> The mass of solution that the chemistry student should use is 23.4 grams

<u>Explanation:</u>

We are given:

Available mass of isopropenylbenzene = 120. g

Amount of isopropenylbenzene needed by chemistry student = 10.00 g

42.7 % (w/w) solution of isopropenylbenzene.

This means that 42.7 grams of isopropenylbenzene is present in 100 grams of solution.

To calculate the mass of solution for given needed of isopropenylbenzene, we apply unitary method:

For 42.7 grams of isopropenylbenzene, the amount of solution needed is 100 grams

So, for 10.00 grams of isopropenylbenzene, the amount of solution needed will be = $\frac{100}{42.7}\times 10=23.4g$

Hence, the mass of solution that the chemistry student should use is 23.4 grams

3 0

3 years ago

A 2. 00 g sample of cocl2. x h2o is dried in an oven. when the anhydrous salt is removed from the oven, its mass is 1. 565 g. wh

timofeeve [1]

It is Cobalt(II)chloride dihydrate. The value of x is 2.

First, we have to determine the mass of H₂O that was evaporated upon heating which will be = 2.00g - 1.56 g

= 0.435 g

So,

CoCl₂ + x.H₂O → CoCl₂.xH₂O

Molecular mass of CoCl₂ = 129.839 g/mol

Molecular mass of H₂O = 18 g/mol

Weight of sample after heating = 1.565 g

Weight of H₂O evaporated = 0.435 g

Hence,

$18x = \frac{129.839X0.435}{1.565} \\x = \frac{55.48}{28.17} \\x = 1.9$

x ≈ 2

So, it is Cobalt(II)chloride dihydrate.

Learn more about molecular mass here:

brainly.com/question/13147431

#SPJ4

3 0

2 years ago